About the Execution of 2025-gold for FunctionPointer-PT-c032
| Execution Summary | |||||
| Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
| 2881.424 | 3600000.00 | 4962076.00 | 10390.20 | ? ? ? ? inf ? ? ? 0 0 ? ? 0 ? ? ? | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2026-input.r159-tall-177961079800019.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2026-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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=====================================================================
Generated by BenchKit 2-5973
Executing tool gold2025
Input is FunctionPointer-PT-c032, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r159-tall-177961079800019
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 4.6M
-rw-r--r-- 1 mcc users 7.7K Mar 7 07:28 CTLCardinality.txt
-rw-r--r-- 1 mcc users 82K Mar 7 07:28 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.3K Mar 7 07:28 CTLFireability.txt
-rw-r--r-- 1 mcc users 32K Mar 7 07:28 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Mar 15 10:26 LTLCardinality.txt
-rw-r--r-- 1 mcc users 29K Mar 15 10:26 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K Mar 15 10:26 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K Mar 15 10:26 LTLFireability.xml
-rw-r--r-- 1 mcc users 15K Mar 7 07:28 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 155K Mar 7 07:28 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 6.9K Mar 7 07:28 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 52K Mar 7 07:28 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Mar 15 10:26 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Mar 15 10:26 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 equiv_col
-rw-r--r-- 1 mcc users 5 Mar 3 18:30 instance
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 iscolored
-rw-r--r-- 1 mcc users 4.2M Mar 3 18:30 model.pnml
--------------------
content from stdout:
=== Data for post analysis generated by BenchKit (invocation template)
The expected result is a vector of positive values
NUM_VECTOR
echo here is the order used to build the result vector(from xml file)
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-00
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-01
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-02
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-03
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-04
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-05
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-06
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-07
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-08
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-09
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-10
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-11
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-12
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-13
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-14
FORMULA_NAME FunctionPointer-PT-c032-UpperBounds-15
=== Now, execution of the tool begins
BK_START 1779707081124
Invoking MCC driver with
GOLD_TOOL=
BK_EXAMINATION=UpperBounds
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=FunctionPointer-PT-c032
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
UpperBounds PT
Running Version 202505121319
[2026-05-25 11:04:42] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, UpperBounds, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2026-05-25 11:04:42] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2026-05-25 11:04:42] [INFO ] Load time of PNML (sax parser for PT used): 370 ms
[2026-05-25 11:04:42] [INFO ] Transformed 2826 places.
[2026-05-25 11:04:42] [INFO ] Transformed 8960 transitions.
[2026-05-25 11:04:42] [INFO ] Parsed PT model containing 2826 places and 8960 transitions and 36096 arcs in 505 ms.
Parsed 16 properties from file /home/mcc/execution/UpperBounds.xml in 8 ms.
Deduced a syphon composed of 1198 places in 41 ms
Reduce places removed 1198 places and 2998 transitions.
FORMULA FunctionPointer-PT-c032-UpperBounds-08 0 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-c032-UpperBounds-09 0 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-c032-UpperBounds-12 0 TECHNIQUES TOPOLOGICAL INITIAL_STATE
Current structural bounds on expressions (Initially) : Max Seen:[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (Before main loop) : Max Seen:[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:04:43] [INFO ] Flow matrix only has 3540 transitions (discarded 2422 similar events)
// Phase 1: matrix 3540 rows 1628 cols
[2026-05-25 11:04:43] [INFO ] Computed 4 invariants in 104 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 10002 steps (2 resets) in 251 ms. (39 steps per ms)
BEST_FIRST walk for 130013 steps (50 resets) in 381 ms. (340 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[2, 4, 3, 0, 7, 0, 4, 1, 0, 2, 0, 0, 0] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:04:43] [INFO ] Flow matrix only has 3540 transitions (discarded 2422 similar events)
[2026-05-25 11:04:43] [INFO ] Invariant cache hit.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:04:44] [INFO ] [Real]Absence check using 3 positive place invariants in 18 ms returned sat
[2026-05-25 11:04:44] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:04:45] [INFO ] [Real]Absence check using state equation in 716 ms returned sat
[2026-05-25 11:04:45] [INFO ] State equation strengthened by 479 read => feed constraints.
[2026-05-25 11:04:45] [INFO ] [Real]Added 479 Read/Feed constraints in 208 ms returned sat
[2026-05-25 11:04:45] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:04:45] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:04:45] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 11:04:46] [INFO ] [Nat]Absence check using state equation in 737 ms returned sat
[2026-05-25 11:04:46] [INFO ] [Nat]Added 479 Read/Feed constraints in 178 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:04:48] [INFO ] Deduced a trap composed of 133 places in 1520 ms of which 249 ms to minimize.
[2026-05-25 11:04:48] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 1780 ms
[2026-05-25 11:04:49] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 895 ms.
[2026-05-25 11:04:49] [INFO ] Added : 2 causal constraints over 1 iterations in 1388 ms. Result :sat
Minimization took 580 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:04:50] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:04:50] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 11:04:51] [INFO ] [Real]Absence check using state equation in 702 ms returned sat
[2026-05-25 11:04:51] [INFO ] [Real]Added 479 Read/Feed constraints in 141 ms returned sat
[2026-05-25 11:04:51] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:04:51] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:04:51] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:04:52] [INFO ] [Nat]Absence check using state equation in 738 ms returned sat
[2026-05-25 11:04:52] [INFO ] [Nat]Added 479 Read/Feed constraints in 125 ms returned sat
[2026-05-25 11:04:53] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 1048 ms.
[2026-05-25 11:04:54] [INFO ] Added : 2 causal constraints over 1 iterations in 1507 ms. Result :sat
Minimization took 577 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:04:55] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:04:55] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 11:04:55] [INFO ] [Real]Absence check using state equation in 746 ms returned sat
[2026-05-25 11:04:56] [INFO ] [Real]Added 479 Read/Feed constraints in 175 ms returned sat
[2026-05-25 11:04:56] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:04:56] [INFO ] [Nat]Absence check using 3 positive place invariants in 16 ms returned sat
[2026-05-25 11:04:56] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:04:57] [INFO ] [Nat]Absence check using state equation in 727 ms returned sat
[2026-05-25 11:04:57] [INFO ] [Nat]Added 479 Read/Feed constraints in 104 ms returned sat
[2026-05-25 11:04:57] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 540 ms.
[2026-05-25 11:04:58] [INFO ] Added : 1 causal constraints over 1 iterations in 872 ms. Result :sat
Minimization took 575 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:04:58] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:04:58] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:04:59] [INFO ] [Real]Absence check using state equation in 703 ms returned sat
[2026-05-25 11:04:59] [INFO ] [Real]Added 479 Read/Feed constraints in 119 ms returned sat
[2026-05-25 11:04:59] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:00] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:00] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:00] [INFO ] [Nat]Absence check using state equation in 724 ms returned sat
[2026-05-25 11:05:00] [INFO ] [Nat]Added 479 Read/Feed constraints in 81 ms returned sat
[2026-05-25 11:05:01] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 561 ms.
[2026-05-25 11:05:01] [INFO ] Added : 1 causal constraints over 1 iterations in 907 ms. Result :sat
Minimization took 576 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:02] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:05:02] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 2 ms returned sat
[2026-05-25 11:05:03] [INFO ] [Real]Absence check using state equation in 751 ms returned sat
[2026-05-25 11:05:03] [INFO ] [Real]Added 479 Read/Feed constraints in 168 ms returned sat
[2026-05-25 11:05:03] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:03] [INFO ] [Nat]Absence check using 3 positive place invariants in 15 ms returned sat
[2026-05-25 11:05:03] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 3 ms returned sat
[2026-05-25 11:05:04] [INFO ] [Nat]Absence check using state equation in 681 ms returned sat
[2026-05-25 11:05:04] [INFO ] [Nat]Added 479 Read/Feed constraints in 119 ms returned sat
[2026-05-25 11:05:05] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 517 ms.
[2026-05-25 11:05:05] [INFO ] Added : 2 causal constraints over 1 iterations in 878 ms. Result :sat
Minimization took 576 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:06] [INFO ] [Real]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:06] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:07] [INFO ] [Real]Absence check using state equation in 728 ms returned sat
[2026-05-25 11:05:07] [INFO ] [Real]Added 479 Read/Feed constraints in 147 ms returned sat
[2026-05-25 11:05:07] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:07] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:07] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 11:05:08] [INFO ] [Nat]Absence check using state equation in 649 ms returned sat
[2026-05-25 11:05:08] [INFO ] [Nat]Added 479 Read/Feed constraints in 95 ms returned sat
[2026-05-25 11:05:09] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 515 ms.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:05:10] [INFO ] Deduced a trap composed of 133 places in 1426 ms of which 235 ms to minimize.
[2026-05-25 11:05:10] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 1655 ms
[2026-05-25 11:05:11] [INFO ] Added : 2 causal constraints over 1 iterations in 2608 ms. Result :sat
Minimization took 577 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:11] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:05:11] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 11:05:12] [INFO ] [Real]Absence check using state equation in 756 ms returned sat
[2026-05-25 11:05:12] [INFO ] [Real]Added 479 Read/Feed constraints in 134 ms returned sat
[2026-05-25 11:05:12] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:13] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:13] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 11:05:13] [INFO ] [Nat]Absence check using state equation in 651 ms returned sat
[2026-05-25 11:05:13] [INFO ] [Nat]Added 479 Read/Feed constraints in 97 ms returned sat
[2026-05-25 11:05:14] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 518 ms.
[2026-05-25 11:05:14] [INFO ] Added : 2 causal constraints over 1 iterations in 863 ms. Result :sat
Minimization took 575 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:15] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:05:15] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:16] [INFO ] [Real]Absence check using state equation in 658 ms returned sat
[2026-05-25 11:05:16] [INFO ] [Real]Added 479 Read/Feed constraints in 128 ms returned sat
[2026-05-25 11:05:16] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:16] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:16] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:17] [INFO ] [Nat]Absence check using state equation in 767 ms returned sat
[2026-05-25 11:05:17] [INFO ] [Nat]Added 479 Read/Feed constraints in 99 ms returned sat
[2026-05-25 11:05:18] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 528 ms.
[2026-05-25 11:05:18] [INFO ] Added : 2 causal constraints over 1 iterations in 879 ms. Result :sat
Minimization took 577 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:19] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:05:19] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:20] [INFO ] [Real]Absence check using state equation in 740 ms returned sat
[2026-05-25 11:05:20] [INFO ] [Real]Added 479 Read/Feed constraints in 142 ms returned sat
[2026-05-25 11:05:20] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:20] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:20] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:21] [INFO ] [Nat]Absence check using state equation in 739 ms returned sat
[2026-05-25 11:05:21] [INFO ] [Nat]Added 479 Read/Feed constraints in 88 ms returned sat
[2026-05-25 11:05:22] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 536 ms.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:05:23] [INFO ] Deduced a trap composed of 133 places in 1420 ms of which 236 ms to minimize.
[2026-05-25 11:05:23] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 1631 ms
[2026-05-25 11:05:24] [INFO ] Added : 2 causal constraints over 1 iterations in 2620 ms. Result :sat
Minimization took 576 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:24] [INFO ] [Real]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:24] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:25] [INFO ] [Real]Absence check using state equation in 758 ms returned sat
[2026-05-25 11:05:25] [INFO ] [Real]Added 479 Read/Feed constraints in 136 ms returned sat
[2026-05-25 11:05:25] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:26] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:26] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:26] [INFO ] [Nat]Absence check using state equation in 698 ms returned sat
[2026-05-25 11:05:26] [INFO ] [Nat]Added 479 Read/Feed constraints in 90 ms returned sat
[2026-05-25 11:05:27] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 528 ms.
[2026-05-25 11:05:27] [INFO ] Added : 2 causal constraints over 1 iterations in 870 ms. Result :sat
Minimization took 577 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:28] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:05:28] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:29] [INFO ] [Real]Absence check using state equation in 688 ms returned sat
[2026-05-25 11:05:29] [INFO ] [Real]Added 479 Read/Feed constraints in 104 ms returned sat
[2026-05-25 11:05:29] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:29] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:29] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:30] [INFO ] [Nat]Absence check using state equation in 718 ms returned sat
[2026-05-25 11:05:30] [INFO ] [Nat]Added 479 Read/Feed constraints in 96 ms returned sat
[2026-05-25 11:05:31] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 515 ms.
[2026-05-25 11:05:31] [INFO ] Added : 1 causal constraints over 1 iterations in 867 ms. Result :sat
Minimization took 579 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:32] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:05:32] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:32] [INFO ] [Real]Absence check using state equation in 712 ms returned sat
[2026-05-25 11:05:33] [INFO ] [Real]Added 479 Read/Feed constraints in 149 ms returned sat
[2026-05-25 11:05:33] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:33] [INFO ] [Nat]Absence check using 3 positive place invariants in 15 ms returned sat
[2026-05-25 11:05:33] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:34] [INFO ] [Nat]Absence check using state equation in 724 ms returned sat
[2026-05-25 11:05:34] [INFO ] [Nat]Added 479 Read/Feed constraints in 118 ms returned sat
[2026-05-25 11:05:34] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 518 ms.
[2026-05-25 11:05:35] [INFO ] Added : 1 causal constraints over 1 iterations in 863 ms. Result :sat
Minimization took 574 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:36] [INFO ] [Real]Absence check using 3 positive place invariants in 13 ms returned sat
[2026-05-25 11:05:36] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 2 ms returned sat
[2026-05-25 11:05:36] [INFO ] [Real]Absence check using state equation in 749 ms returned sat
[2026-05-25 11:05:36] [INFO ] [Real]Added 479 Read/Feed constraints in 131 ms returned sat
[2026-05-25 11:05:37] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:05:37] [INFO ] [Nat]Absence check using 3 positive place invariants in 14 ms returned sat
[2026-05-25 11:05:37] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 11:05:37] [INFO ] [Nat]Absence check using state equation in 737 ms returned sat
[2026-05-25 11:05:38] [INFO ] [Nat]Added 479 Read/Feed constraints in 140 ms returned sat
[2026-05-25 11:05:38] [INFO ] Computed and/alt/rep : 351/504/351 causal constraints (skipped 3187 transitions) in 521 ms.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:05:40] [INFO ] Deduced a trap composed of 133 places in 1442 ms of which 241 ms to minimize.
[2026-05-25 11:05:40] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 1706 ms
[2026-05-25 11:05:40] [INFO ] Added : 2 causal constraints over 1 iterations in 2694 ms. Result :sat
Minimization took 576 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[2, 4, 3, 0, 7, 0, 4, 1, 0, 2, 0, 0, 0] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[2, 4, 3, 0, 7, 0, 4, 1, 0, 2, 0, 0, 0] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 1628 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 1628/1628 places, 5962/5962 transitions.
Graph (complete) has 7332 edges and 1628 vertex of which 1422 are kept as prefixes of interest. Removing 206 places using SCC suffix rule.13 ms
Discarding 206 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 379 transitions
Reduce isomorphic transitions removed 379 transitions.
Iterating post reduction 0 with 379 rules applied. Total rules applied 380 place count 1422 transition count 5583
Discarding 296 places :
Symmetric choice reduction at 1 with 296 rule applications. Total rules 676 place count 1126 transition count 3323
Iterating global reduction 1 with 296 rules applied. Total rules applied 972 place count 1126 transition count 3323
Ensure Unique test removed 364 transitions
Reduce isomorphic transitions removed 364 transitions.
Iterating post reduction 1 with 364 rules applied. Total rules applied 1336 place count 1126 transition count 2959
Discarding 154 places :
Symmetric choice reduction at 2 with 154 rule applications. Total rules 1490 place count 972 transition count 2651
Iterating global reduction 2 with 154 rules applied. Total rules applied 1644 place count 972 transition count 2651
Ensure Unique test removed 72 transitions
Reduce isomorphic transitions removed 72 transitions.
Iterating post reduction 2 with 72 rules applied. Total rules applied 1716 place count 972 transition count 2579
Discarding 14 places :
Symmetric choice reduction at 3 with 14 rule applications. Total rules 1730 place count 958 transition count 2551
Iterating global reduction 3 with 14 rules applied. Total rules applied 1744 place count 958 transition count 2551
Discarding 14 places :
Symmetric choice reduction at 3 with 14 rule applications. Total rules 1758 place count 944 transition count 2523
Iterating global reduction 3 with 14 rules applied. Total rules applied 1772 place count 944 transition count 2523
Discarding 14 places :
Symmetric choice reduction at 3 with 14 rule applications. Total rules 1786 place count 930 transition count 2495
Iterating global reduction 3 with 14 rules applied. Total rules applied 1800 place count 930 transition count 2495
Discarding 14 places :
Symmetric choice reduction at 3 with 14 rule applications. Total rules 1814 place count 916 transition count 2467
Iterating global reduction 3 with 14 rules applied. Total rules applied 1828 place count 916 transition count 2467
Discarding 13 places :
Symmetric choice reduction at 3 with 13 rule applications. Total rules 1841 place count 903 transition count 2441
Iterating global reduction 3 with 13 rules applied. Total rules applied 1854 place count 903 transition count 2441
Discarding 13 places :
Symmetric choice reduction at 3 with 13 rule applications. Total rules 1867 place count 890 transition count 2415
Iterating global reduction 3 with 13 rules applied. Total rules applied 1880 place count 890 transition count 2415
Discarding 13 places :
Symmetric choice reduction at 3 with 13 rule applications. Total rules 1893 place count 877 transition count 2389
Iterating global reduction 3 with 13 rules applied. Total rules applied 1906 place count 877 transition count 2389
Discarding 57 places :
Symmetric choice reduction at 3 with 57 rule applications. Total rules 1963 place count 820 transition count 2173
Iterating global reduction 3 with 57 rules applied. Total rules applied 2020 place count 820 transition count 2173
Discarding 57 places :
Symmetric choice reduction at 3 with 57 rule applications. Total rules 2077 place count 763 transition count 1945
Iterating global reduction 3 with 57 rules applied. Total rules applied 2134 place count 763 transition count 1945
Discarding 57 places :
Symmetric choice reduction at 3 with 57 rule applications. Total rules 2191 place count 706 transition count 1819
Iterating global reduction 3 with 57 rules applied. Total rules applied 2248 place count 706 transition count 1819
Discarding 57 places :
Symmetric choice reduction at 3 with 57 rule applications. Total rules 2305 place count 649 transition count 1705
Iterating global reduction 3 with 57 rules applied. Total rules applied 2362 place count 649 transition count 1705
Discarding 57 places :
Symmetric choice reduction at 3 with 57 rule applications. Total rules 2419 place count 592 transition count 1591
Iterating global reduction 3 with 57 rules applied. Total rules applied 2476 place count 592 transition count 1591
Discarding 57 places :
Symmetric choice reduction at 3 with 57 rule applications. Total rules 2533 place count 535 transition count 1477
Iterating global reduction 3 with 57 rules applied. Total rules applied 2590 place count 535 transition count 1477
Discarding 54 places :
Symmetric choice reduction at 3 with 54 rule applications. Total rules 2644 place count 481 transition count 1369
Iterating global reduction 3 with 54 rules applied. Total rules applied 2698 place count 481 transition count 1369
Discarding 6 places :
Symmetric choice reduction at 3 with 6 rule applications. Total rules 2704 place count 475 transition count 1357
Iterating global reduction 3 with 6 rules applied. Total rules applied 2710 place count 475 transition count 1357
Drop transitions (Redundant composition of simpler transitions.) removed 14 transitions
Redundant transition composition rules discarded 14 transitions
Iterating global reduction 3 with 14 rules applied. Total rules applied 2724 place count 475 transition count 1343
Applied a total of 2724 rules in 1159 ms. Remains 475 /1628 variables (removed 1153) and now considering 1343/5962 (removed 4619) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1171 ms. Remains : 475/1628 places, 1343/5962 transitions.
[2026-05-25 11:05:42] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 161 ms. (steps per millisecond=62 ) properties (out of 13) seen :[0, 2, 0, 3, 3, 2, 2, 0, 2, 3, 0, 4, 3]
Current structural bounds on expressions (after cover walk) : Max Seen:[2, 4, 3, 3, 7, 2, 4, 1, 2, 3, 0, 4, 3] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:05:43] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
// Phase 1: matrix 779 rows 475 cols
[2026-05-25 11:05:43] [INFO ] Computed 3 invariants in 4 ms
Current structural bounds on expressions (after invariants) : Max Seen:[2, 4, 3, 3, 7, 2, 4, 1, 2, 3, 0, 4, 3] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 3060 ms. (326 steps per ms)
BEST_FIRST walk for 13000013 steps (26 resets) in 16148 ms. (805 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[17, 43, 546, 110, 119, 147, 107, 185, 22, 82, 102, 119, 10] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:06:02] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:06:02] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:02] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:02] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:06:02] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:06:02] [INFO ] [Real]Added 99 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:06:02] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:02] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:02] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:06:02] [INFO ] [Nat]Added 99 Read/Feed constraints in 57 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:06:03] [INFO ] Deduced a trap composed of 78 places in 259 ms of which 40 ms to minimize.
[2026-05-25 11:06:03] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 310 ms
[2026-05-25 11:06:03] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:06:03] [INFO ] Added : 2 causal constraints over 1 iterations in 182 ms. Result :sat
Minimization took 357 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:03] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:06:04] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:06:04] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:06:04] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:04] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:04] [INFO ] [Nat]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:06:04] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:06:04] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:06:04] [INFO ] Added : 14 causal constraints over 4 iterations in 277 ms. Result :sat
Minimization took 322 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:05] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:06:05] [INFO ] [Real]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:06:05] [INFO ] [Real]Added 99 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:06:05] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:05] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:05] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:06:05] [INFO ] [Nat]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:06:05] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:06:05] [INFO ] Added : 1 causal constraints over 1 iterations in 178 ms. Result :sat
Minimization took 328 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:06] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:06] [INFO ] [Real]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:06:06] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:06:06] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:06] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:06] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:06:06] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:06:06] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:06:06] [INFO ] Added : 1 causal constraints over 1 iterations in 173 ms. Result :sat
Minimization took 329 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:07] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:06:07] [INFO ] [Real]Absence check using state equation in 159 ms returned sat
[2026-05-25 11:06:07] [INFO ] [Real]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:06:07] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:07] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:07] [INFO ] [Nat]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:06:07] [INFO ] [Nat]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:06:07] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 85 ms.
[2026-05-25 11:06:08] [INFO ] Added : 10 causal constraints over 4 iterations in 277 ms. Result :sat
Minimization took 327 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:08] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:08] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:06:08] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:06:08] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:08] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:08] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:06:08] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:06:09] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 89 ms.
[2026-05-25 11:06:09] [INFO ] Added : 5 causal constraints over 2 iterations in 239 ms. Result :sat
Minimization took 330 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:09] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:09] [INFO ] [Real]Absence check using state equation in 160 ms returned sat
[2026-05-25 11:06:09] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:06:09] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:09] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:10] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:06:10] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:06:10] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:06:10] [INFO ] Added : 14 causal constraints over 4 iterations in 264 ms. Result :sat
Minimization took 334 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:10] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:10] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:06:11] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:06:11] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:11] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:11] [INFO ] [Nat]Absence check using state equation in 162 ms returned sat
[2026-05-25 11:06:11] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:06:11] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 86 ms.
[2026-05-25 11:06:11] [INFO ] Added : 15 causal constraints over 5 iterations in 343 ms. Result :sat
Minimization took 331 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:12] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:12] [INFO ] [Real]Absence check using state equation in 165 ms returned sat
[2026-05-25 11:06:12] [INFO ] [Real]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:06:12] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:12] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:12] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:06:12] [INFO ] [Nat]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:06:12] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:06:12] [INFO ] Added : 3 causal constraints over 1 iterations in 187 ms. Result :sat
Minimization took 314 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:13] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:13] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:06:13] [INFO ] [Real]Added 99 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:06:13] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:13] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:06:13] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:06:13] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:06:13] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 72 ms.
[2026-05-25 11:06:13] [INFO ] Added : 7 causal constraints over 2 iterations in 219 ms. Result :sat
Minimization took 325 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:14] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:14] [INFO ] [Real]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:06:14] [INFO ] [Real]Added 99 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:06:14] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:14] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:14] [INFO ] [Nat]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:06:14] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:06:14] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:06:14] [INFO ] Added : 1 causal constraints over 1 iterations in 163 ms. Result :sat
Minimization took 319 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:15] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:06:15] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:06:15] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:06:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:06:15] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:06:15] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:06:15] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:06:16] [INFO ] Added : 1 causal constraints over 1 iterations in 171 ms. Result :sat
Minimization took 330 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:16] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:06:16] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:06:16] [INFO ] [Real]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:06:16] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:06:16] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:06:16] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:06:16] [INFO ] [Nat]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:06:17] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 81 ms.
[2026-05-25 11:06:17] [INFO ] Added : 4 causal constraints over 2 iterations in 226 ms. Result :sat
Minimization took 322 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[17, 43, 546, 110, 119, 147, 107, 185, 22, 82, 102, 119, 10] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[29, 43, 546, 110, 119, 147, 107, 185, 22, 82, 102, 119, 10] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 58 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 58 ms. Remains : 475/475 places, 1343/1343 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 90 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
[2026-05-25 11:06:17] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:06:17] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:06:18] [INFO ] Implicit Places using invariants in 571 ms returned []
[2026-05-25 11:06:18] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:06:18] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:06:18] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:06:20] [INFO ] Implicit Places using invariants and state equation in 1911 ms returned []
Implicit Place search using SMT with State Equation took 2484 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:06:20] [INFO ] Redundant transitions in 92 ms returned []
Running 1341 sub problems to find dead transitions.
[2026-05-25 11:06:20] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:06:20] [INFO ] Invariant cache hit.
[2026-05-25 11:06:20] [INFO ] State equation strengthened by 99 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:06:37] [INFO ] Deduced a trap composed of 131 places in 117 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 475/1254 variables, and 4 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30032 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/475 constraints, ReadFeed: 0/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/475 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 3 (OVERLAPS) 779/1254 variables, 475/479 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1254 variables, 99/578 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1254/1254 variables, and 1919 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30936 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 475/475 constraints, ReadFeed: 99/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 63116ms problems are : Problem set: 0 solved, 1341 unsolved
Search for dead transitions found 0 dead transitions in 63135ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65828 ms. Remains : 475/475 places, 1343/1343 transitions.
[2026-05-25 11:07:23] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 146 ms. (steps per millisecond=68 ) properties (out of 13) seen :[0, 2, 5, 2, 2, 2, 2, 2, 4, 1, 2, 3, 4]
Current structural bounds on expressions (after cover walk) : Max Seen:[29, 43, 546, 110, 119, 147, 107, 185, 22, 82, 102, 119, 10] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:07:23] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:07:23] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[29, 43, 546, 110, 119, 147, 107, 185, 22, 82, 102, 119, 10] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000003 steps (2 resets) in 3060 ms. (326 steps per ms)
BEST_FIRST walk for 13000013 steps (26 resets) in 15758 ms. (824 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[29, 68, 738, 122, 137, 147, 107, 185, 51, 82, 261, 127, 121] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:07:42] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:07:42] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:42] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:42] [INFO ] [Real]Absence check using state equation in 138 ms returned sat
[2026-05-25 11:07:42] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:07:43] [INFO ] [Real]Added 99 Read/Feed constraints in 40 ms returned sat
[2026-05-25 11:07:43] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:43] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:43] [INFO ] [Nat]Absence check using state equation in 137 ms returned sat
[2026-05-25 11:07:43] [INFO ] [Nat]Added 99 Read/Feed constraints in 58 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:07:43] [INFO ] Deduced a trap composed of 78 places in 249 ms of which 39 ms to minimize.
[2026-05-25 11:07:43] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 305 ms
[2026-05-25 11:07:43] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:07:43] [INFO ] Added : 2 causal constraints over 1 iterations in 168 ms. Result :sat
Minimization took 369 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:44] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:44] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:07:44] [INFO ] [Real]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:07:44] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:44] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:44] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:07:44] [INFO ] [Nat]Added 99 Read/Feed constraints in 22 ms returned sat
[2026-05-25 11:07:44] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:07:44] [INFO ] Added : 14 causal constraints over 4 iterations in 265 ms. Result :sat
Minimization took 328 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:45] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:07:45] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:07:45] [INFO ] [Real]Added 99 Read/Feed constraints in 40 ms returned sat
[2026-05-25 11:07:45] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:45] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:45] [INFO ] [Nat]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:07:45] [INFO ] [Nat]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:07:45] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:07:46] [INFO ] Added : 1 causal constraints over 1 iterations in 176 ms. Result :sat
Minimization took 335 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:46] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:46] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:07:46] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:07:46] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:46] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:46] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:07:46] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:07:47] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:07:47] [INFO ] Added : 1 causal constraints over 1 iterations in 162 ms. Result :sat
Minimization took 322 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:47] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:07:47] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:07:47] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:07:47] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:47] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:48] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:07:48] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:07:48] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:07:48] [INFO ] Added : 10 causal constraints over 4 iterations in 260 ms. Result :sat
Minimization took 327 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:48] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:07:48] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:07:48] [INFO ] [Real]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:07:48] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:49] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:49] [INFO ] [Nat]Absence check using state equation in 163 ms returned sat
[2026-05-25 11:07:49] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:07:49] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:07:49] [INFO ] Added : 5 causal constraints over 2 iterations in 214 ms. Result :sat
Minimization took 329 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:49] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:50] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:07:50] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:07:50] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:50] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:50] [INFO ] [Nat]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:07:50] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:07:50] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:07:50] [INFO ] Added : 14 causal constraints over 4 iterations in 253 ms. Result :sat
Minimization took 333 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:51] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:07:51] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:07:51] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:07:51] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:51] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:51] [INFO ] [Nat]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:07:51] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:07:51] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:07:51] [INFO ] Added : 15 causal constraints over 5 iterations in 320 ms. Result :sat
Minimization took 332 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:52] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:52] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:07:52] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:07:52] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:52] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:52] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:07:52] [INFO ] [Nat]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:07:52] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:07:53] [INFO ] Added : 3 causal constraints over 1 iterations in 202 ms. Result :sat
Minimization took 308 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:53] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:53] [INFO ] [Real]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:07:53] [INFO ] [Real]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:07:53] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:53] [INFO ] [Nat]Absence check using 3 positive place invariants in 6 ms returned sat
[2026-05-25 11:07:53] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:07:53] [INFO ] [Nat]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:07:53] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:07:54] [INFO ] Added : 7 causal constraints over 2 iterations in 233 ms. Result :sat
Minimization took 326 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:54] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:54] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:07:54] [INFO ] [Real]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:07:54] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:54] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:55] [INFO ] [Nat]Absence check using state equation in 170 ms returned sat
[2026-05-25 11:07:55] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:07:55] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:07:55] [INFO ] Added : 1 causal constraints over 1 iterations in 188 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:55] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:55] [INFO ] [Real]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:07:55] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:07:55] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:55] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:07:56] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:07:56] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:07:56] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 83 ms.
[2026-05-25 11:07:56] [INFO ] Added : 1 causal constraints over 1 iterations in 179 ms. Result :sat
Minimization took 316 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:56] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:07:56] [INFO ] [Real]Absence check using state equation in 138 ms returned sat
[2026-05-25 11:07:56] [INFO ] [Real]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:07:56] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:07:57] [INFO ] [Nat]Absence check using 3 positive place invariants in 6 ms returned sat
[2026-05-25 11:07:57] [INFO ] [Nat]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:07:57] [INFO ] [Nat]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:07:57] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:07:57] [INFO ] Added : 4 causal constraints over 2 iterations in 192 ms. Result :sat
Minimization took 316 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[29, 68, 738, 122, 137, 147, 107, 185, 51, 82, 261, 127, 121] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[29, 68, 738, 122, 137, 147, 107, 185, 51, 82, 261, 127, 121] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 61 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 61 ms. Remains : 475/475 places, 1343/1343 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 67 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
[2026-05-25 11:07:58] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:07:58] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:07:58] [INFO ] Implicit Places using invariants in 354 ms returned []
[2026-05-25 11:07:58] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:07:58] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:07:58] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:08:00] [INFO ] Implicit Places using invariants and state equation in 1883 ms returned []
Implicit Place search using SMT with State Equation took 2242 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:08:00] [INFO ] Redundant transitions in 33 ms returned []
Running 1341 sub problems to find dead transitions.
[2026-05-25 11:08:00] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:08:00] [INFO ] Invariant cache hit.
[2026-05-25 11:08:00] [INFO ] State equation strengthened by 99 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:08:16] [INFO ] Deduced a trap composed of 131 places in 121 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 475/1254 variables, and 4 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30022 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/475 constraints, ReadFeed: 0/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/475 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 3 (OVERLAPS) 779/1254 variables, 475/479 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1254 variables, 99/578 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1254/1254 variables, and 1919 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30938 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 475/475 constraints, ReadFeed: 99/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62809ms problems are : Problem set: 0 solved, 1341 unsolved
Search for dead transitions found 0 dead transitions in 62812ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65162 ms. Remains : 475/475 places, 1343/1343 transitions.
[2026-05-25 11:09:03] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 76 ms. (steps per millisecond=131 ) properties (out of 13) seen :[0, 4, 2, 0, 2, 3, 2, 1, 2, 2, 2, 4, 2]
Current structural bounds on expressions (after cover walk) : Max Seen:[29, 68, 738, 122, 137, 147, 107, 185, 51, 82, 261, 127, 121] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:09:03] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:09:03] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[29, 68, 738, 122, 137, 147, 107, 185, 51, 82, 261, 127, 121] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 3026 ms. (330 steps per ms)
BEST_FIRST walk for 13000013 steps (26 resets) in 15809 ms. (822 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[29, 68, 931, 122, 137, 147, 107, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:09:22] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:09:22] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:22] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:22] [INFO ] [Real]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:09:22] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:09:22] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:09:22] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:22] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:22] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:09:22] [INFO ] [Nat]Added 99 Read/Feed constraints in 58 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:09:23] [INFO ] Deduced a trap composed of 78 places in 249 ms of which 40 ms to minimize.
[2026-05-25 11:09:23] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 320 ms
[2026-05-25 11:09:23] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:09:23] [INFO ] Added : 2 causal constraints over 1 iterations in 165 ms. Result :sat
Minimization took 362 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:23] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:23] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:09:23] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:09:24] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:24] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:24] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:09:24] [INFO ] [Nat]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:09:24] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 79 ms.
[2026-05-25 11:09:24] [INFO ] Added : 14 causal constraints over 4 iterations in 252 ms. Result :sat
Minimization took 322 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:24] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:25] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:09:25] [INFO ] [Real]Added 99 Read/Feed constraints in 41 ms returned sat
[2026-05-25 11:09:25] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:25] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:25] [INFO ] [Nat]Absence check using state equation in 135 ms returned sat
[2026-05-25 11:09:25] [INFO ] [Nat]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:09:25] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:09:25] [INFO ] Added : 1 causal constraints over 1 iterations in 170 ms. Result :sat
Minimization took 314 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:26] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:09:26] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:09:26] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:09:26] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:26] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:26] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:09:26] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:09:26] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:09:26] [INFO ] Added : 1 causal constraints over 1 iterations in 162 ms. Result :sat
Minimization took 319 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:27] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:09:27] [INFO ] [Real]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:09:27] [INFO ] [Real]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:09:27] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:27] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:27] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:09:27] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:09:27] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:09:27] [INFO ] Added : 10 causal constraints over 4 iterations in 259 ms. Result :sat
Minimization took 326 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:28] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:28] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:09:28] [INFO ] [Real]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:09:28] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:28] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:28] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:09:28] [INFO ] [Nat]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:09:28] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:09:29] [INFO ] Added : 5 causal constraints over 2 iterations in 233 ms. Result :sat
Minimization took 332 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:29] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:09:29] [INFO ] [Real]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:09:29] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:09:29] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:29] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:09:29] [INFO ] [Nat]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:09:29] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:09:30] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:09:30] [INFO ] Added : 14 causal constraints over 4 iterations in 266 ms. Result :sat
Minimization took 337 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:30] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:09:30] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:09:30] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:09:30] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:30] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:31] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:09:31] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:09:31] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:09:31] [INFO ] Added : 15 causal constraints over 5 iterations in 341 ms. Result :sat
Minimization took 329 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:31] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:09:32] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:09:32] [INFO ] [Real]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:09:32] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:32] [INFO ] [Nat]Absence check using 3 positive place invariants in 6 ms returned sat
[2026-05-25 11:09:32] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:09:32] [INFO ] [Nat]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:09:32] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:09:32] [INFO ] Added : 3 causal constraints over 1 iterations in 199 ms. Result :sat
Minimization took 326 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:33] [INFO ] [Real]Absence check using 3 positive place invariants in 6 ms returned sat
[2026-05-25 11:09:33] [INFO ] [Real]Absence check using state equation in 161 ms returned sat
[2026-05-25 11:09:33] [INFO ] [Real]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:09:33] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:33] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:33] [INFO ] [Nat]Absence check using state equation in 164 ms returned sat
[2026-05-25 11:09:33] [INFO ] [Nat]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:09:33] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:09:33] [INFO ] Added : 7 causal constraints over 2 iterations in 226 ms. Result :sat
Minimization took 319 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:34] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:34] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:09:34] [INFO ] [Real]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:09:34] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:34] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:34] [INFO ] [Nat]Absence check using state equation in 163 ms returned sat
[2026-05-25 11:09:34] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:09:34] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:09:34] [INFO ] Added : 1 causal constraints over 1 iterations in 161 ms. Result :sat
Minimization took 324 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:35] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:35] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:09:35] [INFO ] [Real]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:09:35] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:35] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:35] [INFO ] [Nat]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:09:35] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:09:35] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:09:35] [INFO ] Added : 1 causal constraints over 1 iterations in 166 ms. Result :sat
Minimization took 320 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:36] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:09:36] [INFO ] [Real]Absence check using state equation in 137 ms returned sat
[2026-05-25 11:09:36] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:09:36] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:09:36] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:09:36] [INFO ] [Nat]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:09:36] [INFO ] [Nat]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:09:36] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:09:37] [INFO ] Added : 4 causal constraints over 2 iterations in 208 ms. Result :sat
Minimization took 329 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[29, 68, 931, 122, 137, 147, 107, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[29, 68, 931, 122, 137, 147, 107, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 60 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 60 ms. Remains : 475/475 places, 1343/1343 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 57 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
[2026-05-25 11:09:37] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:09:37] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:09:37] [INFO ] Implicit Places using invariants in 322 ms returned []
[2026-05-25 11:09:37] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:09:37] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:09:38] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:09:39] [INFO ] Implicit Places using invariants and state equation in 1920 ms returned []
Implicit Place search using SMT with State Equation took 2244 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:09:39] [INFO ] Redundant transitions in 22 ms returned []
Running 1341 sub problems to find dead transitions.
[2026-05-25 11:09:39] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:09:39] [INFO ] Invariant cache hit.
[2026-05-25 11:09:39] [INFO ] State equation strengthened by 99 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:09:56] [INFO ] Deduced a trap composed of 131 places in 125 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 475/1254 variables, and 4 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30029 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/475 constraints, ReadFeed: 0/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/475 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 3 (OVERLAPS) 779/1254 variables, 475/479 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1254 variables, 99/578 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1254/1254 variables, and 1919 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30971 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 475/475 constraints, ReadFeed: 99/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62720ms problems are : Problem set: 0 solved, 1341 unsolved
Search for dead transitions found 0 dead transitions in 62723ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65055 ms. Remains : 475/475 places, 1343/1343 transitions.
[2026-05-25 11:10:42] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 112 ms. (steps per millisecond=89 ) properties (out of 13) seen :[0, 0, 4, 4, 2, 2, 0, 2, 0, 0, 3, 2, 0]
Current structural bounds on expressions (after cover walk) : Max Seen:[29, 68, 931, 122, 137, 147, 107, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:10:42] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:10:42] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[29, 68, 931, 122, 137, 147, 107, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 2679 ms. (373 steps per ms)
BEST_FIRST walk for 13000013 steps (26 resets) in 15951 ms. (814 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[29, 68, 931, 157, 137, 147, 181, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:11:01] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:11:01] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:01] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:01] [INFO ] [Real]Absence check using state equation in 162 ms returned sat
[2026-05-25 11:11:01] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:11:01] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:11:01] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:01] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:02] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:11:02] [INFO ] [Nat]Added 99 Read/Feed constraints in 60 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:11:02] [INFO ] Deduced a trap composed of 78 places in 265 ms of which 40 ms to minimize.
[2026-05-25 11:11:02] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 320 ms
[2026-05-25 11:11:02] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:11:02] [INFO ] Added : 2 causal constraints over 1 iterations in 183 ms. Result :sat
Minimization took 372 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:03] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:03] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:11:03] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:11:03] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:03] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:03] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:11:03] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:11:03] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:11:03] [INFO ] Added : 14 causal constraints over 4 iterations in 271 ms. Result :sat
Minimization took 329 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:04] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:04] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:11:04] [INFO ] [Real]Added 99 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:11:04] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:04] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:04] [INFO ] [Nat]Absence check using state equation in 138 ms returned sat
[2026-05-25 11:11:04] [INFO ] [Nat]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:11:04] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 90 ms.
[2026-05-25 11:11:05] [INFO ] Added : 1 causal constraints over 1 iterations in 190 ms. Result :sat
Minimization took 326 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:05] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:05] [INFO ] [Real]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:11:05] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:11:05] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:05] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:05] [INFO ] [Nat]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:11:05] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:11:06] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:11:06] [INFO ] Added : 1 causal constraints over 1 iterations in 166 ms. Result :sat
Minimization took 335 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:06] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:06] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:11:06] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:11:06] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:06] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:06] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:11:07] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:11:07] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:11:07] [INFO ] Added : 10 causal constraints over 4 iterations in 268 ms. Result :sat
Minimization took 333 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:07] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:07] [INFO ] [Real]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:11:07] [INFO ] [Real]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:11:07] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:08] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:08] [INFO ] [Nat]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:11:08] [INFO ] [Nat]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:11:08] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:11:08] [INFO ] Added : 5 causal constraints over 2 iterations in 226 ms. Result :sat
Minimization took 322 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:08] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:08] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:11:09] [INFO ] [Real]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:11:09] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:09] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:09] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:11:09] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:11:09] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:11:09] [INFO ] Added : 14 causal constraints over 4 iterations in 283 ms. Result :sat
Minimization took 327 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:10] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:10] [INFO ] [Real]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:11:10] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:11:10] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:10] [INFO ] [Nat]Absence check using 3 positive place invariants in 12 ms returned sat
[2026-05-25 11:11:10] [INFO ] [Nat]Absence check using state equation in 160 ms returned sat
[2026-05-25 11:11:10] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:11:10] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:11:10] [INFO ] Added : 15 causal constraints over 5 iterations in 333 ms. Result :sat
Minimization took 335 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:11] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:11] [INFO ] [Real]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:11:11] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:11:11] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:11] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:11] [INFO ] [Nat]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:11:11] [INFO ] [Nat]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:11:11] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 82 ms.
[2026-05-25 11:11:12] [INFO ] Added : 3 causal constraints over 1 iterations in 213 ms. Result :sat
Minimization took 322 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:12] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:12] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:11:12] [INFO ] [Real]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:11:12] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:12] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:12] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:11:12] [INFO ] [Nat]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:11:13] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:11:13] [INFO ] Added : 7 causal constraints over 2 iterations in 219 ms. Result :sat
Minimization took 333 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:13] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:13] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:11:13] [INFO ] [Real]Added 99 Read/Feed constraints in 40 ms returned sat
[2026-05-25 11:11:13] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:13] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:14] [INFO ] [Nat]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:11:14] [INFO ] [Nat]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:11:14] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:11:14] [INFO ] Added : 1 causal constraints over 1 iterations in 172 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:14] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:14] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:11:14] [INFO ] [Real]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:11:14] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:15] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:11:15] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:11:15] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:11:15] [INFO ] Added : 1 causal constraints over 1 iterations in 166 ms. Result :sat
Minimization took 320 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:15] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:11:15] [INFO ] [Real]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:11:15] [INFO ] [Real]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:11:16] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:11:16] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:11:16] [INFO ] [Nat]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:11:16] [INFO ] [Nat]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:11:16] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:11:16] [INFO ] Added : 4 causal constraints over 2 iterations in 198 ms. Result :sat
Minimization took 317 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[29, 68, 931, 157, 137, 147, 181, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[30, 68, 931, 157, 137, 147, 181, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 57 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 57 ms. Remains : 475/475 places, 1343/1343 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 57 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
[2026-05-25 11:11:17] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:11:17] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:11:17] [INFO ] Implicit Places using invariants in 352 ms returned []
[2026-05-25 11:11:17] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:11:17] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:11:17] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:11:19] [INFO ] Implicit Places using invariants and state equation in 1907 ms returned []
Implicit Place search using SMT with State Equation took 2262 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:11:19] [INFO ] Redundant transitions in 31 ms returned []
Running 1341 sub problems to find dead transitions.
[2026-05-25 11:11:19] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:11:19] [INFO ] Invariant cache hit.
[2026-05-25 11:11:19] [INFO ] State equation strengthened by 99 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:11:36] [INFO ] Deduced a trap composed of 131 places in 123 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 475/1254 variables, and 4 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30022 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/475 constraints, ReadFeed: 0/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/475 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 3 (OVERLAPS) 779/1254 variables, 475/479 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1254 variables, 99/578 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1254/1254 variables, and 1919 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30935 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 475/475 constraints, ReadFeed: 99/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62773ms problems are : Problem set: 0 solved, 1341 unsolved
Search for dead transitions found 0 dead transitions in 62776ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65134 ms. Remains : 475/475 places, 1343/1343 transitions.
[2026-05-25 11:12:22] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 130 ms. (steps per millisecond=76 ) properties (out of 13) seen :[0, 0, 4, 2, 2, 0, 0, 1, 3, 2, 3, 2, 5]
Current structural bounds on expressions (after cover walk) : Max Seen:[30, 68, 931, 157, 137, 147, 181, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:12:22] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:12:22] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[30, 68, 931, 157, 137, 147, 181, 185, 51, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000002 steps (2 resets) in 3175 ms. (314 steps per ms)
BEST_FIRST walk for 13000013 steps (26 resets) in 16304 ms. (797 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:12:41] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:12:41] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:42] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:42] [INFO ] [Real]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:12:42] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:12:42] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:12:42] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:42] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:42] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:12:42] [INFO ] [Nat]Added 99 Read/Feed constraints in 59 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:12:42] [INFO ] Deduced a trap composed of 78 places in 258 ms of which 40 ms to minimize.
[2026-05-25 11:12:42] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 306 ms
[2026-05-25 11:12:42] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:12:43] [INFO ] Added : 2 causal constraints over 1 iterations in 176 ms. Result :sat
Minimization took 357 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:43] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:43] [INFO ] [Real]Absence check using state equation in 159 ms returned sat
[2026-05-25 11:12:43] [INFO ] [Real]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:12:43] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:43] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:12:43] [INFO ] [Nat]Absence check using state equation in 163 ms returned sat
[2026-05-25 11:12:43] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:12:44] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:12:44] [INFO ] Added : 14 causal constraints over 4 iterations in 278 ms. Result :sat
Minimization took 328 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:44] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:44] [INFO ] [Real]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:12:44] [INFO ] [Real]Added 99 Read/Feed constraints in 40 ms returned sat
[2026-05-25 11:12:44] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:45] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:45] [INFO ] [Nat]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:12:45] [INFO ] [Nat]Added 99 Read/Feed constraints in 43 ms returned sat
[2026-05-25 11:12:45] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:12:45] [INFO ] Added : 1 causal constraints over 1 iterations in 167 ms. Result :sat
Minimization took 334 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:45] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:45] [INFO ] [Real]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:12:46] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:12:46] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:46] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:46] [INFO ] [Nat]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:12:46] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:12:46] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:12:46] [INFO ] Added : 1 causal constraints over 1 iterations in 168 ms. Result :sat
Minimization took 322 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:46] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:47] [INFO ] [Real]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:12:47] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:12:47] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:47] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:12:47] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:12:47] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:12:47] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 81 ms.
[2026-05-25 11:12:47] [INFO ] Added : 10 causal constraints over 4 iterations in 276 ms. Result :sat
Minimization took 326 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:48] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:48] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:12:48] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:12:48] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:48] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:48] [INFO ] [Nat]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:12:48] [INFO ] [Nat]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:12:48] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:12:48] [INFO ] Added : 5 causal constraints over 2 iterations in 232 ms. Result :sat
Minimization took 335 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:49] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:49] [INFO ] [Real]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:12:49] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:12:49] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:49] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:49] [INFO ] [Nat]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:12:49] [INFO ] [Nat]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:12:49] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:12:50] [INFO ] Added : 14 causal constraints over 4 iterations in 266 ms. Result :sat
Minimization took 332 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:50] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:50] [INFO ] [Real]Absence check using state equation in 175 ms returned sat
[2026-05-25 11:12:50] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:12:50] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:50] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:12:50] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:12:50] [INFO ] [Nat]Added 99 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:12:51] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:12:51] [INFO ] Added : 15 causal constraints over 5 iterations in 314 ms. Result :sat
Minimization took 341 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:51] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:12:51] [INFO ] [Real]Absence check using state equation in 178 ms returned sat
[2026-05-25 11:12:51] [INFO ] [Real]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:12:51] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:52] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:52] [INFO ] [Nat]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:12:52] [INFO ] [Nat]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:12:52] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 73 ms.
[2026-05-25 11:12:52] [INFO ] Added : 3 causal constraints over 1 iterations in 194 ms. Result :sat
Minimization took 327 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:52] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:12:52] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:12:53] [INFO ] [Real]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:12:53] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:53] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:53] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:12:53] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:12:53] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:12:53] [INFO ] Added : 7 causal constraints over 2 iterations in 219 ms. Result :sat
Minimization took 326 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:53] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:54] [INFO ] [Real]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:12:54] [INFO ] [Real]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:12:54] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:54] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:54] [INFO ] [Nat]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:12:54] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:12:54] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:12:54] [INFO ] Added : 1 causal constraints over 1 iterations in 192 ms. Result :sat
Minimization took 333 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:55] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:55] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:12:55] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:12:55] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:55] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:55] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:12:55] [INFO ] [Nat]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:12:55] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:12:55] [INFO ] Added : 1 causal constraints over 1 iterations in 160 ms. Result :sat
Minimization took 321 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:56] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:12:56] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:12:56] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:12:56] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:12:56] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:12:56] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:12:56] [INFO ] [Nat]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:12:56] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:12:56] [INFO ] Added : 4 causal constraints over 2 iterations in 202 ms. Result :sat
Minimization took 319 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 56 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 56 ms. Remains : 475/475 places, 1343/1343 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 56 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
[2026-05-25 11:12:57] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:12:57] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:12:57] [INFO ] Implicit Places using invariants in 350 ms returned []
[2026-05-25 11:12:57] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:12:57] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:12:57] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:12:59] [INFO ] Implicit Places using invariants and state equation in 1868 ms returned []
Implicit Place search using SMT with State Equation took 2222 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:12:59] [INFO ] Redundant transitions in 22 ms returned []
Running 1341 sub problems to find dead transitions.
[2026-05-25 11:12:59] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:12:59] [INFO ] Invariant cache hit.
[2026-05-25 11:12:59] [INFO ] State equation strengthened by 99 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:13:15] [INFO ] Deduced a trap composed of 131 places in 133 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 475/1254 variables, and 4 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30025 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/475 constraints, ReadFeed: 0/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/475 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 3 (OVERLAPS) 779/1254 variables, 475/479 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1254 variables, 99/578 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1254/1254 variables, and 1919 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30949 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 475/475 constraints, ReadFeed: 99/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62725ms problems are : Problem set: 0 solved, 1341 unsolved
Search for dead transitions found 0 dead transitions in 62727ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65038 ms. Remains : 475/475 places, 1343/1343 transitions.
[2026-05-25 11:14:02] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 84 ms. (steps per millisecond=119 ) properties (out of 13) seen :[0, 2, 3, 3, 2, 2, 2, 2, 0, 0, 2, 3, 2]
Current structural bounds on expressions (after cover walk) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:14:02] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:14:02] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 140, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000001 steps (2 resets) in 3188 ms. (313 steps per ms)
BEST_FIRST walk for 13000013 steps (26 resets) in 16897 ms. (769 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:14:22] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:14:22] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:22] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:23] [INFO ] [Real]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:14:23] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:14:23] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:14:23] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:23] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:14:23] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:14:23] [INFO ] [Nat]Added 99 Read/Feed constraints in 56 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:14:23] [INFO ] Deduced a trap composed of 78 places in 265 ms of which 39 ms to minimize.
[2026-05-25 11:14:23] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 327 ms
[2026-05-25 11:14:23] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 98 ms.
[2026-05-25 11:14:23] [INFO ] Added : 2 causal constraints over 1 iterations in 193 ms. Result :sat
Minimization took 362 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:24] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:14:24] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:14:24] [INFO ] [Real]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:14:24] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:24] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:24] [INFO ] [Nat]Absence check using state equation in 166 ms returned sat
[2026-05-25 11:14:24] [INFO ] [Nat]Added 99 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:14:24] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 79 ms.
[2026-05-25 11:14:25] [INFO ] Added : 14 causal constraints over 4 iterations in 275 ms. Result :sat
Minimization took 330 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:25] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:25] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:14:25] [INFO ] [Real]Added 99 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:14:25] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:25] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:25] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:14:25] [INFO ] [Nat]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:14:26] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 90 ms.
[2026-05-25 11:14:26] [INFO ] Added : 1 causal constraints over 1 iterations in 177 ms. Result :sat
Minimization took 325 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:26] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:26] [INFO ] [Real]Absence check using state equation in 169 ms returned sat
[2026-05-25 11:14:26] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:14:26] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:26] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:27] [INFO ] [Nat]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:14:27] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:14:27] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 91 ms.
[2026-05-25 11:14:27] [INFO ] Added : 1 causal constraints over 1 iterations in 173 ms. Result :sat
Minimization took 339 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:27] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:14:27] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:14:27] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:14:27] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:28] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:28] [INFO ] [Nat]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:14:28] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:14:28] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 87 ms.
[2026-05-25 11:14:28] [INFO ] Added : 10 causal constraints over 4 iterations in 266 ms. Result :sat
Minimization took 330 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:28] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:29] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:14:29] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:14:29] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:29] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:29] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:14:29] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:14:29] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 82 ms.
[2026-05-25 11:14:29] [INFO ] Added : 5 causal constraints over 2 iterations in 222 ms. Result :sat
Minimization took 317 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:30] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:30] [INFO ] [Real]Absence check using state equation in 162 ms returned sat
[2026-05-25 11:14:30] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:14:30] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:30] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:30] [INFO ] [Nat]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:14:30] [INFO ] [Nat]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:14:30] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 89 ms.
[2026-05-25 11:14:30] [INFO ] Added : 14 causal constraints over 4 iterations in 289 ms. Result :sat
Minimization took 331 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:31] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:31] [INFO ] [Real]Absence check using state equation in 163 ms returned sat
[2026-05-25 11:14:31] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:14:31] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:31] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:31] [INFO ] [Nat]Absence check using state equation in 163 ms returned sat
[2026-05-25 11:14:31] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:14:31] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 79 ms.
[2026-05-25 11:14:32] [INFO ] Added : 15 causal constraints over 5 iterations in 321 ms. Result :sat
Minimization took 334 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:32] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:14:32] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:14:32] [INFO ] [Real]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:14:32] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:32] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:32] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:14:32] [INFO ] [Nat]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:14:33] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:14:33] [INFO ] Added : 3 causal constraints over 1 iterations in 186 ms. Result :sat
Minimization took 333 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:33] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:33] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:14:33] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:14:33] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:33] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:14:34] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:14:34] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:14:34] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:14:34] [INFO ] Added : 7 causal constraints over 2 iterations in 212 ms. Result :sat
Minimization took 339 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:34] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:34] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:14:34] [INFO ] [Real]Added 99 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:14:35] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:35] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:35] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:14:35] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:14:35] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:14:35] [INFO ] Added : 1 causal constraints over 1 iterations in 175 ms. Result :sat
Minimization took 338 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:35] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:36] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:14:36] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:14:36] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:36] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:36] [INFO ] [Nat]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:14:36] [INFO ] [Nat]Added 99 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:14:36] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:14:36] [INFO ] Added : 1 causal constraints over 1 iterations in 184 ms. Result :sat
Minimization took 327 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:37] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:14:37] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:14:37] [INFO ] [Real]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:14:37] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:14:37] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:14:37] [INFO ] [Nat]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:14:37] [INFO ] [Nat]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:14:37] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:14:37] [INFO ] Added : 4 causal constraints over 2 iterations in 203 ms. Result :sat
Minimization took 323 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 57 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 58 ms. Remains : 475/475 places, 1343/1343 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 54 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
[2026-05-25 11:14:38] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:14:38] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:14:38] [INFO ] Implicit Places using invariants in 330 ms returned []
[2026-05-25 11:14:38] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:14:38] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:14:38] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:14:40] [INFO ] Implicit Places using invariants and state equation in 1905 ms returned []
Implicit Place search using SMT with State Equation took 2236 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:14:40] [INFO ] Redundant transitions in 30 ms returned []
Running 1341 sub problems to find dead transitions.
[2026-05-25 11:14:40] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:14:40] [INFO ] Invariant cache hit.
[2026-05-25 11:14:40] [INFO ] State equation strengthened by 99 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:14:57] [INFO ] Deduced a trap composed of 131 places in 114 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 475/1254 variables, and 4 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30028 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/475 constraints, ReadFeed: 0/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/475 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 3 (OVERLAPS) 779/1254 variables, 475/479 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1254 variables, 99/578 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1254/1254 variables, and 1919 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30964 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 475/475 constraints, ReadFeed: 99/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 63310ms problems are : Problem set: 0 solved, 1341 unsolved
Search for dead transitions found 0 dead transitions in 63312ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65641 ms. Remains : 475/475 places, 1343/1343 transitions.
[2026-05-25 11:15:43] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 82 ms. (steps per millisecond=121 ) properties (out of 13) seen :[0, 1, 4, 2, 2, 2, 1, 1, 0, 0, 3, 2, 0]
Current structural bounds on expressions (after cover walk) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:15:44] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:15:44] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[30, 68, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000001 steps (2 resets) in 3225 ms. (309 steps per ms)
BEST_FIRST walk for 13000013 steps (26 resets) in 16657 ms. (780 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:16:04] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:16:04] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:04] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:04] [INFO ] [Real]Absence check using state equation in 161 ms returned sat
[2026-05-25 11:16:04] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:16:04] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:16:04] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:04] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:04] [INFO ] [Nat]Absence check using state equation in 160 ms returned sat
[2026-05-25 11:16:04] [INFO ] [Nat]Added 99 Read/Feed constraints in 55 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:16:04] [INFO ] Deduced a trap composed of 78 places in 255 ms of which 40 ms to minimize.
[2026-05-25 11:16:04] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 316 ms
[2026-05-25 11:16:05] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:16:05] [INFO ] Added : 2 causal constraints over 1 iterations in 182 ms. Result :sat
Minimization took 359 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:05] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:05] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:16:05] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:16:05] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:05] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:06] [INFO ] [Nat]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:16:06] [INFO ] [Nat]Added 99 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:16:06] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:16:06] [INFO ] Added : 14 causal constraints over 4 iterations in 265 ms. Result :sat
Minimization took 333 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:06] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:06] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:16:06] [INFO ] [Real]Added 99 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:16:07] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:07] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:07] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:16:07] [INFO ] [Nat]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:16:07] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:16:07] [INFO ] Added : 1 causal constraints over 1 iterations in 164 ms. Result :sat
Minimization took 325 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:07] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:08] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:16:08] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:16:08] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:08] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:08] [INFO ] [Nat]Absence check using state equation in 136 ms returned sat
[2026-05-25 11:16:08] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:16:08] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 85 ms.
[2026-05-25 11:16:08] [INFO ] Added : 1 causal constraints over 1 iterations in 168 ms. Result :sat
Minimization took 317 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:08] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:09] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:16:09] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:16:09] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:09] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:09] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:16:09] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:16:09] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:16:09] [INFO ] Added : 10 causal constraints over 4 iterations in 282 ms. Result :sat
Minimization took 327 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:10] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:10] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:16:10] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:16:10] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:10] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:10] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:16:10] [INFO ] [Nat]Added 99 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:16:10] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 73 ms.
[2026-05-25 11:16:10] [INFO ] Added : 5 causal constraints over 2 iterations in 197 ms. Result :sat
Minimization took 317 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:11] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:11] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:16:11] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:16:11] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:11] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:11] [INFO ] [Nat]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:16:11] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:16:11] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 85 ms.
[2026-05-25 11:16:11] [INFO ] Added : 14 causal constraints over 4 iterations in 281 ms. Result :sat
Minimization took 329 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:12] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:12] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:16:12] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:16:12] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:12] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:12] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:16:12] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:16:12] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:16:13] [INFO ] Added : 15 causal constraints over 5 iterations in 317 ms. Result :sat
Minimization took 335 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:13] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:13] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:16:13] [INFO ] [Real]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:16:13] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:13] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:14] [INFO ] [Nat]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:16:14] [INFO ] [Nat]Added 99 Read/Feed constraints in 42 ms returned sat
[2026-05-25 11:16:14] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:16:14] [INFO ] Added : 3 causal constraints over 1 iterations in 200 ms. Result :sat
Minimization took 332 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:14] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:14] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:16:14] [INFO ] [Real]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:16:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:15] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:16:15] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:16:15] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:16:15] [INFO ] Added : 7 causal constraints over 2 iterations in 216 ms. Result :sat
Minimization took 328 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:15] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:16] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:16:16] [INFO ] [Real]Added 99 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:16:16] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:16] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:16] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:16:16] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:16:16] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:16:16] [INFO ] Added : 1 causal constraints over 1 iterations in 164 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:17] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:16:17] [INFO ] [Real]Absence check using state equation in 167 ms returned sat
[2026-05-25 11:16:17] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:16:17] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:17] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:17] [INFO ] [Nat]Absence check using state equation in 164 ms returned sat
[2026-05-25 11:16:17] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:16:17] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:16:17] [INFO ] Added : 1 causal constraints over 1 iterations in 172 ms. Result :sat
Minimization took 325 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:18] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:16:18] [INFO ] [Real]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:16:18] [INFO ] [Real]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:16:18] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:16:18] [INFO ] [Nat]Absence check using 3 positive place invariants in 6 ms returned sat
[2026-05-25 11:16:18] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:16:18] [INFO ] [Nat]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:16:18] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 89 ms.
[2026-05-25 11:16:18] [INFO ] Added : 4 causal constraints over 2 iterations in 214 ms. Result :sat
Minimization took 323 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 56 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 56 ms. Remains : 475/475 places, 1343/1343 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 72 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
[2026-05-25 11:16:19] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:16:19] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:16:19] [INFO ] Implicit Places using invariants in 327 ms returned []
[2026-05-25 11:16:19] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:16:19] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:16:19] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:16:21] [INFO ] Implicit Places using invariants and state equation in 1868 ms returned []
Implicit Place search using SMT with State Equation took 2196 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:16:21] [INFO ] Redundant transitions in 32 ms returned []
Running 1341 sub problems to find dead transitions.
[2026-05-25 11:16:21] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:16:21] [INFO ] Invariant cache hit.
[2026-05-25 11:16:21] [INFO ] State equation strengthened by 99 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:16:38] [INFO ] Deduced a trap composed of 131 places in 121 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Error getting values : (error "ParserException while parsing response: ((s0 0.0)
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(s196 timeout
0.0 org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 475/1254 variables, and 4 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30025 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/475 constraints, ReadFeed: 0/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/475 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 3 (OVERLAPS) 779/1254 variables, 475/479 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1254 variables, 99/578 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1254/1254 variables, and 1919 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30932 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 475/475 constraints, ReadFeed: 99/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62992ms problems are : Problem set: 0 solved, 1341 unsolved
Search for dead transitions found 0 dead transitions in 62994ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65306 ms. Remains : 475/475 places, 1343/1343 transitions.
[2026-05-25 11:17:24] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 82 ms. (steps per millisecond=121 ) properties (out of 13) seen :[0, 2, 5, 3, 2, 3, 3, 4, 2, 3, 3, 2, 3]
Current structural bounds on expressions (after cover walk) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:17:24] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:17:24] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 127, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000001 steps (2 resets) in 3045 ms. (328 steps per ms)
BEST_FIRST walk for 13000013 steps (26 resets) in 17434 ms. (745 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:17:45] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:17:45] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:45] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:17:45] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:17:45] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:17:45] [INFO ] [Real]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:17:45] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:45] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:45] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:17:46] [INFO ] [Nat]Added 99 Read/Feed constraints in 58 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:17:46] [INFO ] Deduced a trap composed of 78 places in 247 ms of which 40 ms to minimize.
[2026-05-25 11:17:46] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 300 ms
[2026-05-25 11:17:46] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 82 ms.
[2026-05-25 11:17:46] [INFO ] Added : 2 causal constraints over 1 iterations in 177 ms. Result :sat
Minimization took 369 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:47] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:17:47] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:17:47] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:17:47] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:47] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:17:47] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:17:47] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:17:47] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 87 ms.
[2026-05-25 11:17:47] [INFO ] Added : 14 causal constraints over 4 iterations in 284 ms. Result :sat
Minimization took 343 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:48] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:48] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:17:48] [INFO ] [Real]Added 99 Read/Feed constraints in 41 ms returned sat
[2026-05-25 11:17:48] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:48] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:48] [INFO ] [Nat]Absence check using state equation in 159 ms returned sat
[2026-05-25 11:17:48] [INFO ] [Nat]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:17:48] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 83 ms.
[2026-05-25 11:17:48] [INFO ] Added : 1 causal constraints over 1 iterations in 182 ms. Result :sat
Minimization took 336 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:49] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:17:49] [INFO ] [Real]Absence check using state equation in 159 ms returned sat
[2026-05-25 11:17:49] [INFO ] [Real]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:17:49] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:49] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:49] [INFO ] [Nat]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:17:49] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:17:49] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 90 ms.
[2026-05-25 11:17:50] [INFO ] Added : 1 causal constraints over 1 iterations in 182 ms. Result :sat
Minimization took 325 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:50] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:17:50] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:17:50] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:17:50] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:50] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:50] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:17:50] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:17:51] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 96 ms.
[2026-05-25 11:17:51] [INFO ] Added : 10 causal constraints over 4 iterations in 276 ms. Result :sat
Minimization took 328 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:51] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:51] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:17:51] [INFO ] [Real]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:17:51] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:51] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:52] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:17:52] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:17:52] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 82 ms.
[2026-05-25 11:17:52] [INFO ] Added : 5 causal constraints over 2 iterations in 241 ms. Result :sat
Minimization took 338 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:52] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:52] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:17:52] [INFO ] [Real]Added 99 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:17:53] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:53] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:53] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:17:53] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:17:53] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 81 ms.
[2026-05-25 11:17:53] [INFO ] Added : 14 causal constraints over 4 iterations in 262 ms. Result :sat
Minimization took 329 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:53] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:54] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:17:54] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:17:54] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:54] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:54] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:17:54] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:17:54] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 86 ms.
[2026-05-25 11:17:54] [INFO ] Added : 15 causal constraints over 5 iterations in 354 ms. Result :sat
Minimization took 329 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:55] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:55] [INFO ] [Real]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:17:55] [INFO ] [Real]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:17:55] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:55] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:55] [INFO ] [Nat]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:17:55] [INFO ] [Nat]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:17:55] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 81 ms.
[2026-05-25 11:17:55] [INFO ] Added : 3 causal constraints over 1 iterations in 206 ms. Result :sat
Minimization took 317 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:56] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:17:56] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:17:56] [INFO ] [Real]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:17:56] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:56] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:17:56] [INFO ] [Nat]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:17:56] [INFO ] [Nat]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:17:56] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 85 ms.
[2026-05-25 11:17:57] [INFO ] Added : 7 causal constraints over 2 iterations in 237 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:57] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:17:57] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:17:57] [INFO ] [Real]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:17:57] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:57] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:57] [INFO ] [Nat]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:17:57] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:17:58] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 81 ms.
[2026-05-25 11:17:58] [INFO ] Added : 1 causal constraints over 1 iterations in 174 ms. Result :sat
Minimization took 322 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:58] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:17:58] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:17:58] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:17:58] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:58] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:58] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:17:59] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:17:59] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 88 ms.
[2026-05-25 11:17:59] [INFO ] Added : 1 causal constraints over 1 iterations in 182 ms. Result :sat
Minimization took 329 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:59] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:17:59] [INFO ] [Real]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:17:59] [INFO ] [Real]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:17:59] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:17:59] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:18:00] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:18:00] [INFO ] [Nat]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:18:00] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 86 ms.
[2026-05-25 11:18:00] [INFO ] Added : 4 causal constraints over 2 iterations in 216 ms. Result :sat
Minimization took 323 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 54 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 54 ms. Remains : 475/475 places, 1343/1343 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 55 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
[2026-05-25 11:18:00] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:18:00] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:18:01] [INFO ] Implicit Places using invariants in 329 ms returned []
[2026-05-25 11:18:01] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:18:01] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:18:01] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:18:03] [INFO ] Implicit Places using invariants and state equation in 1841 ms returned []
Implicit Place search using SMT with State Equation took 2171 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:18:03] [INFO ] Redundant transitions in 30 ms returned []
Running 1341 sub problems to find dead transitions.
[2026-05-25 11:18:03] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:18:03] [INFO ] Invariant cache hit.
[2026-05-25 11:18:03] [INFO ] State equation strengthened by 99 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:18:20] [INFO ] Deduced a trap composed of 131 places in 118 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 475/1254 variables, and 4 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30026 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/475 constraints, ReadFeed: 0/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/475 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 3 (OVERLAPS) 779/1254 variables, 475/479 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1254 variables, 99/578 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1254/1254 variables, and 1919 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30931 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 475/475 constraints, ReadFeed: 99/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62978ms problems are : Problem set: 0 solved, 1341 unsolved
Search for dead transitions found 0 dead transitions in 62980ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65243 ms. Remains : 475/475 places, 1343/1343 transitions.
[2026-05-25 11:19:06] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 82 ms. (steps per millisecond=121 ) properties (out of 13) seen :[3, 4, 5, 1, 2, 3, 3, 0, 0, 0, 0, 2, 1]
Current structural bounds on expressions (after cover walk) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:19:06] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:19:06] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 62, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000001 steps (2 resets) in 3032 ms. (329 steps per ms)
BEST_FIRST walk for 13000011 steps (26 resets) in 17715 ms. (733 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:19:27] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:19:27] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:27] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:27] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:19:27] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:19:27] [INFO ] [Real]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:19:27] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:27] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:27] [INFO ] [Nat]Absence check using state equation in 160 ms returned sat
[2026-05-25 11:19:27] [INFO ] [Nat]Added 99 Read/Feed constraints in 56 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:19:28] [INFO ] Deduced a trap composed of 78 places in 281 ms of which 41 ms to minimize.
[2026-05-25 11:19:28] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 346 ms
[2026-05-25 11:19:28] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 90 ms.
[2026-05-25 11:19:28] [INFO ] Added : 2 causal constraints over 1 iterations in 178 ms. Result :sat
Minimization took 364 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:28] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:28] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:19:29] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:19:29] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:29] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:29] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:19:29] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:19:29] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 83 ms.
[2026-05-25 11:19:29] [INFO ] Added : 14 causal constraints over 4 iterations in 277 ms. Result :sat
Minimization took 334 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:30] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:30] [INFO ] [Real]Absence check using state equation in 170 ms returned sat
[2026-05-25 11:19:30] [INFO ] [Real]Added 99 Read/Feed constraints in 42 ms returned sat
[2026-05-25 11:19:30] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:30] [INFO ] [Nat]Absence check using 3 positive place invariants in 9 ms returned sat
[2026-05-25 11:19:30] [INFO ] [Nat]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:19:30] [INFO ] [Nat]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:19:30] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 79 ms.
[2026-05-25 11:19:30] [INFO ] Added : 1 causal constraints over 1 iterations in 169 ms. Result :sat
Minimization took 321 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:31] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:31] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:19:31] [INFO ] [Real]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:19:31] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:31] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:31] [INFO ] [Nat]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:19:31] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:19:31] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:19:31] [INFO ] Added : 1 causal constraints over 1 iterations in 165 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:32] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:32] [INFO ] [Real]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:19:32] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:19:32] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:32] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:32] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:19:32] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:19:32] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:19:32] [INFO ] Added : 10 causal constraints over 4 iterations in 252 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:33] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:33] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:19:33] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:19:33] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:33] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:33] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:19:33] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:19:33] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:19:34] [INFO ] Added : 5 causal constraints over 2 iterations in 217 ms. Result :sat
Minimization took 320 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:34] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:34] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:19:34] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:19:34] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:34] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:34] [INFO ] [Nat]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:19:34] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:19:35] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 85 ms.
[2026-05-25 11:19:35] [INFO ] Added : 14 causal constraints over 4 iterations in 277 ms. Result :sat
Minimization took 335 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:35] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:35] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:19:35] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:19:35] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:36] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:36] [INFO ] [Nat]Absence check using state equation in 162 ms returned sat
[2026-05-25 11:19:36] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:19:36] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 95 ms.
[2026-05-25 11:19:36] [INFO ] Added : 15 causal constraints over 5 iterations in 350 ms. Result :sat
Minimization took 414 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:37] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:37] [INFO ] [Real]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:19:37] [INFO ] [Real]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:19:37] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:37] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:37] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:19:37] [INFO ] [Nat]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:19:37] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 73 ms.
[2026-05-25 11:19:37] [INFO ] Added : 3 causal constraints over 1 iterations in 195 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:38] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:38] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:19:38] [INFO ] [Real]Added 99 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:19:38] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:38] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:38] [INFO ] [Nat]Absence check using state equation in 160 ms returned sat
[2026-05-25 11:19:38] [INFO ] [Nat]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:19:38] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:19:38] [INFO ] Added : 7 causal constraints over 2 iterations in 219 ms. Result :sat
Minimization took 318 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:39] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:39] [INFO ] [Real]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:19:39] [INFO ] [Real]Added 99 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:19:39] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:39] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:39] [INFO ] [Nat]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:19:39] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:19:39] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 75 ms.
[2026-05-25 11:19:40] [INFO ] Added : 1 causal constraints over 1 iterations in 169 ms. Result :sat
Minimization took 330 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:40] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:40] [INFO ] [Real]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:19:40] [INFO ] [Real]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:19:40] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:40] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:40] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:19:40] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:19:40] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 82 ms.
[2026-05-25 11:19:41] [INFO ] Added : 1 causal constraints over 1 iterations in 171 ms. Result :sat
Minimization took 318 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:41] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:19:41] [INFO ] [Real]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:19:41] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:19:41] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:19:41] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:19:41] [INFO ] [Nat]Absence check using state equation in 159 ms returned sat
[2026-05-25 11:19:41] [INFO ] [Nat]Added 99 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:19:42] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 88 ms.
[2026-05-25 11:19:42] [INFO ] Added : 4 causal constraints over 2 iterations in 222 ms. Result :sat
Minimization took 408 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[30, 86, 931, 157, 170, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 13 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 54 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 54 ms. Remains : 475/475 places, 1343/1343 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Applied a total of 0 rules in 54 ms. Remains 475 /475 variables (removed 0) and now considering 1343/1343 (removed 0) transitions.
[2026-05-25 11:19:42] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:19:42] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:19:43] [INFO ] Implicit Places using invariants in 338 ms returned []
[2026-05-25 11:19:43] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:19:43] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:19:43] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:19:45] [INFO ] Implicit Places using invariants and state equation in 1894 ms returned []
Implicit Place search using SMT with State Equation took 2234 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:19:45] [INFO ] Redundant transitions in 32 ms returned []
Running 1341 sub problems to find dead transitions.
[2026-05-25 11:19:45] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:19:45] [INFO ] Invariant cache hit.
[2026-05-25 11:19:45] [INFO ] State equation strengthened by 99 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:20:01] [INFO ] Deduced a trap composed of 131 places in 126 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 475/1254 variables, and 4 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 30029 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/475 constraints, ReadFeed: 0/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1341 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/475 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/475 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/475 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 3 (OVERLAPS) 779/1254 variables, 475/479 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1254 variables, 99/578 constraints. Problems are: Problem set: 0 solved, 1341 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1254/1254 variables, and 1919 constraints, problems are : Problem set: 0 solved, 1341 unsolved in 31055 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 475/475 constraints, ReadFeed: 99/99 constraints, PredecessorRefiner: 1341/1341 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62977ms problems are : Problem set: 0 solved, 1341 unsolved
Search for dead transitions found 0 dead transitions in 62979ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65311 ms. Remains : 475/475 places, 1343/1343 transitions.
[2026-05-25 11:20:48] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {217=1, 358=1, 562=1, 759=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {203=1, 344=1, 548=1, 762=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 85 ms. (steps per millisecond=117 ) properties (out of 13) seen :[2, 2, 3, 2, 2147483647, 1, 2, 1, 3, 1, 3, 4, 4]
Current structural bounds on expressions (after cover walk) : Max Seen:[30, 86, 931, 157, +inf, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:20:48] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:20:48] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[30, 86, 931, 157, +inf, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 3202 ms. (312 steps per ms)
FORMULA FunctionPointer-PT-c032-UpperBounds-04 +inf TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 12000012 steps (24 resets) in 15780 ms. (760 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[30, 86, 931, 157, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:21:07] [INFO ] Flow matrix only has 779 transitions (discarded 564 similar events)
[2026-05-25 11:21:07] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:07] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:07] [INFO ] [Real]Absence check using state equation in 160 ms returned sat
[2026-05-25 11:21:07] [INFO ] State equation strengthened by 99 read => feed constraints.
[2026-05-25 11:21:07] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:21:07] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:07] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:07] [INFO ] [Nat]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:21:07] [INFO ] [Nat]Added 99 Read/Feed constraints in 54 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:21:08] [INFO ] Deduced a trap composed of 78 places in 263 ms of which 40 ms to minimize.
[2026-05-25 11:21:08] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 309 ms
[2026-05-25 11:21:08] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 83 ms.
[2026-05-25 11:21:08] [INFO ] Added : 2 causal constraints over 1 iterations in 177 ms. Result :sat
Minimization took 365 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:08] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:09] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:09] [INFO ] [Real]Added 99 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:21:09] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:09] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:09] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:21:09] [INFO ] [Nat]Added 99 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:21:09] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 76 ms.
[2026-05-25 11:21:09] [INFO ] Added : 14 causal constraints over 4 iterations in 287 ms. Result :sat
Minimization took 337 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:10] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:10] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:10] [INFO ] [Real]Added 99 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:21:10] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:10] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:10] [INFO ] [Nat]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:21:10] [INFO ] [Nat]Added 99 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:21:10] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 74 ms.
[2026-05-25 11:21:10] [INFO ] Added : 1 causal constraints over 1 iterations in 168 ms. Result :sat
Minimization took 321 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:11] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:11] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:11] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:21:11] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:11] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:11] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:21:11] [INFO ] [Nat]Added 99 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:21:11] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:21:11] [INFO ] Added : 1 causal constraints over 1 iterations in 163 ms. Result :sat
Minimization took 326 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:12] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:12] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:21:12] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:21:12] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:12] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:12] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:21:12] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:21:12] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 86 ms.
[2026-05-25 11:21:12] [INFO ] Added : 5 causal constraints over 2 iterations in 214 ms. Result :sat
Minimization took 319 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:13] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:13] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:21:13] [INFO ] [Real]Added 99 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:21:13] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:13] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:13] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:13] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:21:13] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 91 ms.
[2026-05-25 11:21:14] [INFO ] Added : 14 causal constraints over 4 iterations in 275 ms. Result :sat
Minimization took 328 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:14] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:14] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:21:14] [INFO ] [Real]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:21:14] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:14] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:15] [INFO ] [Nat]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:21:15] [INFO ] [Nat]Added 99 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:21:15] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:21:15] [INFO ] Added : 15 causal constraints over 5 iterations in 325 ms. Result :sat
Minimization took 325 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:15] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:15] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:21:16] [INFO ] [Real]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:21:16] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:16] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:16] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:21:16] [INFO ] [Nat]Added 99 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:21:16] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 80 ms.
[2026-05-25 11:21:16] [INFO ] Added : 3 causal constraints over 1 iterations in 187 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:16] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:17] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:21:17] [INFO ] [Real]Added 99 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:21:17] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:17] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:17] [INFO ] [Nat]Absence check using state equation in 136 ms returned sat
[2026-05-25 11:21:17] [INFO ] [Nat]Added 99 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:21:17] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 73 ms.
[2026-05-25 11:21:17] [INFO ] Added : 7 causal constraints over 2 iterations in 200 ms. Result :sat
Minimization took 335 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:17] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:18] [INFO ] [Real]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:21:18] [INFO ] [Real]Added 99 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:21:18] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:18] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:18] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:18] [INFO ] [Nat]Added 99 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:21:18] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 72 ms.
[2026-05-25 11:21:18] [INFO ] Added : 1 causal constraints over 1 iterations in 163 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:19] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:19] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:21:19] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:21:19] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:19] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:19] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:21:19] [INFO ] [Nat]Added 99 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:21:19] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 77 ms.
[2026-05-25 11:21:19] [INFO ] Added : 1 causal constraints over 1 iterations in 183 ms. Result :sat
Minimization took 323 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:20] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:20] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:21:20] [INFO ] [Real]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:21:20] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:20] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:20] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:21:20] [INFO ] [Nat]Added 99 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:21:20] [INFO ] Computed and/alt/rep : 105/240/100 causal constraints (skipped 677 transitions) in 78 ms.
[2026-05-25 11:21:20] [INFO ] Added : 4 causal constraints over 2 iterations in 192 ms. Result :sat
Minimization took 328 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[30, 86, 931, 157, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[30, 86, 931, 157, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 12 out of 475 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 475/475 places, 1343/1343 transitions.
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 1 place count 474 transition count 1341
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 474 transition count 1341
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 4 place count 474 transition count 1339
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 5 place count 473 transition count 1337
Iterating global reduction 1 with 1 rules applied. Total rules applied 6 place count 473 transition count 1337
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 7 place count 472 transition count 1335
Iterating global reduction 1 with 1 rules applied. Total rules applied 8 place count 472 transition count 1335
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 9 place count 471 transition count 1333
Iterating global reduction 1 with 1 rules applied. Total rules applied 10 place count 471 transition count 1333
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 11 place count 470 transition count 1331
Iterating global reduction 1 with 1 rules applied. Total rules applied 12 place count 470 transition count 1331
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 13 place count 469 transition count 1327
Iterating global reduction 1 with 1 rules applied. Total rules applied 14 place count 469 transition count 1327
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 15 place count 468 transition count 1325
Iterating global reduction 1 with 1 rules applied. Total rules applied 16 place count 468 transition count 1325
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 17 place count 467 transition count 1323
Iterating global reduction 1 with 1 rules applied. Total rules applied 18 place count 467 transition count 1323
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 19 place count 466 transition count 1321
Iterating global reduction 1 with 1 rules applied. Total rules applied 20 place count 466 transition count 1321
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 21 place count 465 transition count 1319
Iterating global reduction 1 with 1 rules applied. Total rules applied 22 place count 465 transition count 1319
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 23 place count 464 transition count 1317
Iterating global reduction 1 with 1 rules applied. Total rules applied 24 place count 464 transition count 1317
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 25 place count 463 transition count 1315
Iterating global reduction 1 with 1 rules applied. Total rules applied 26 place count 463 transition count 1315
Applied a total of 26 rules in 187 ms. Remains 463 /475 variables (removed 12) and now considering 1315/1343 (removed 28) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 187 ms. Remains : 463/475 places, 1315/1343 transitions.
[2026-05-25 11:21:21] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {230=1, 359=1, 562=1, 749=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 381=1, 584=1, 746=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 76 ms. (steps per millisecond=131 ) properties (out of 12) seen :[1, 2, 4, 2, 1, 1, 1, 3, 3, 1, 0, 1]
Current structural bounds on expressions (after cover walk) : Max Seen:[30, 86, 931, 157, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:21:21] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
// Phase 1: matrix 761 rows 463 cols
[2026-05-25 11:21:21] [INFO ] Computed 3 invariants in 12 ms
Current structural bounds on expressions (after invariants) : Max Seen:[30, 86, 931, 157, 147, 181, 185, 66, 165, 261, 160, 140] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000008 steps (2 resets) in 3010 ms. (332 steps per ms)
BEST_FIRST walk for 12000012 steps (24 resets) in 13423 ms. (893 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[30, 86, 970, 157, 220, 318, 185, 66, 174, 261, 160, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:21:38] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:21:38] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:38] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:38] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:21:38] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:21:38] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:21:38] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:38] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:38] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:21:38] [INFO ] [Nat]Added 96 Read/Feed constraints in 44 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:21:39] [INFO ] Deduced a trap composed of 77 places in 240 ms of which 44 ms to minimize.
[2026-05-25 11:21:39] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 303 ms
[2026-05-25 11:21:39] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:21:39] [INFO ] Added : 2 causal constraints over 1 iterations in 164 ms. Result :sat
Minimization took 286 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:39] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:39] [INFO ] [Real]Absence check using state equation in 162 ms returned sat
[2026-05-25 11:21:39] [INFO ] [Real]Added 96 Read/Feed constraints in 41 ms returned sat
[2026-05-25 11:21:39] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:39] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:40] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:21:40] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:21:40] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:21:40] [INFO ] Added : 10 causal constraints over 4 iterations in 251 ms. Result :sat
Minimization took 263 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:40] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:40] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:21:40] [INFO ] [Real]Added 96 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:21:40] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:41] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:41] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:21:41] [INFO ] [Nat]Added 96 Read/Feed constraints in 21 ms returned sat
[2026-05-25 11:21:41] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:21:41] [INFO ] Added : 1 causal constraints over 1 iterations in 164 ms. Result :sat
Minimization took 255 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:41] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:41] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:21:41] [INFO ] [Real]Added 96 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:21:41] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:42] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:42] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:42] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:21:42] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:21:42] [INFO ] Added : 1 causal constraints over 1 iterations in 164 ms. Result :sat
Minimization took 253 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:42] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:42] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:21:42] [INFO ] [Real]Added 96 Read/Feed constraints in 64 ms returned sat
[2026-05-25 11:21:42] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:43] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:43] [INFO ] [Nat]Absence check using state equation in 135 ms returned sat
[2026-05-25 11:21:43] [INFO ] [Nat]Added 96 Read/Feed constraints in 49 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:21:43] [INFO ] Deduced a trap composed of 77 places in 256 ms of which 46 ms to minimize.
[2026-05-25 11:21:43] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 310 ms
[2026-05-25 11:21:43] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 77 ms.
[2026-05-25 11:21:43] [INFO ] Added : 12 causal constraints over 4 iterations in 267 ms. Result :sat
Minimization took 266 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:44] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:44] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:21:44] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:21:44] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:44] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:44] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:21:44] [INFO ] [Nat]Added 96 Read/Feed constraints in 33 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:21:44] [INFO ] Deduced a trap composed of 77 places in 264 ms of which 46 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:21:45] [INFO ] Deduced a trap composed of 77 places in 257 ms of which 47 ms to minimize.
[2026-05-25 11:21:45] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 614 ms
[2026-05-25 11:21:45] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 80 ms.
[2026-05-25 11:21:45] [INFO ] Added : 6 causal constraints over 3 iterations in 259 ms. Result :sat
Minimization took 282 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:45] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:46] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:21:46] [INFO ] [Real]Added 96 Read/Feed constraints in 44 ms returned sat
[2026-05-25 11:21:46] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:46] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:46] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:46] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:21:46] [INFO ] Deduced a trap composed of 77 places in 255 ms of which 46 ms to minimize.
[2026-05-25 11:21:46] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 334 ms
[2026-05-25 11:21:46] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:21:46] [INFO ] Added : 5 causal constraints over 3 iterations in 249 ms. Result :sat
Minimization took 371 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:47] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:47] [INFO ] [Real]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:21:47] [INFO ] [Real]Added 96 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:21:47] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:47] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:47] [INFO ] [Nat]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:21:47] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:21:47] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 72 ms.
[2026-05-25 11:21:48] [INFO ] Added : 3 causal constraints over 1 iterations in 173 ms. Result :sat
Minimization took 248 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:48] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:48] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:48] [INFO ] [Real]Added 96 Read/Feed constraints in 44 ms returned sat
[2026-05-25 11:21:48] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:48] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:48] [INFO ] [Nat]Absence check using state equation in 159 ms returned sat
[2026-05-25 11:21:48] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:21:48] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:21:49] [INFO ] Added : 3 causal constraints over 1 iterations in 171 ms. Result :sat
Minimization took 249 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:49] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:49] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:49] [INFO ] [Real]Added 96 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:21:49] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:49] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:49] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:49] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:21:49] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:21:50] [INFO ] Added : 1 causal constraints over 1 iterations in 161 ms. Result :sat
Minimization took 243 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:50] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:50] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:21:50] [INFO ] [Real]Added 96 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:21:50] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:50] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:21:50] [INFO ] [Nat]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:21:50] [INFO ] [Nat]Added 96 Read/Feed constraints in 23 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:21:51] [INFO ] Deduced a trap composed of 77 places in 248 ms of which 39 ms to minimize.
[2026-05-25 11:21:51] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 295 ms
[2026-05-25 11:21:51] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:21:51] [INFO ] Added : 1 causal constraints over 1 iterations in 156 ms. Result :sat
Minimization took 248 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:51] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:51] [INFO ] [Real]Absence check using state equation in 160 ms returned sat
[2026-05-25 11:21:51] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:21:51] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:21:51] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:21:52] [INFO ] [Nat]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:21:52] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:21:52] [INFO ] Deduced a trap composed of 77 places in 264 ms of which 45 ms to minimize.
[2026-05-25 11:21:52] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 317 ms
[2026-05-25 11:21:52] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 73 ms.
[2026-05-25 11:21:52] [INFO ] Added : 5 causal constraints over 3 iterations in 382 ms. Result :sat
Minimization took 324 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[30, 86, 970, 157, 220, 318, 185, 66, 174, 261, 160, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[31, 86, 970, 157, 220, 318, 185, 66, 174, 261, 160, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 57 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 57 ms. Remains : 463/463 places, 1315/1315 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 51 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
[2026-05-25 11:21:59] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:21:59] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:21:59] [INFO ] Implicit Places using invariants in 296 ms returned []
[2026-05-25 11:21:59] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:21:59] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:21:59] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:22:01] [INFO ] Implicit Places using invariants and state equation in 1632 ms returned []
Implicit Place search using SMT with State Equation took 1929 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:22:01] [INFO ] Redundant transitions in 29 ms returned []
Running 1313 sub problems to find dead transitions.
[2026-05-25 11:22:01] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:22:01] [INFO ] Invariant cache hit.
[2026-05-25 11:22:01] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:22:13] [INFO ] Deduced a trap composed of 131 places in 115 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 463/1224 variables, and 4 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30020 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/463 constraints, ReadFeed: 0/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/463 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 3 (OVERLAPS) 761/1224 variables, 463/467 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1224 variables, 96/563 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 1876 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30905 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62740ms problems are : Problem set: 0 solved, 1313 unsolved
Search for dead transitions found 0 dead transitions in 62742ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64757 ms. Remains : 463/463 places, 1315/1315 transitions.
[2026-05-25 11:23:03] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {230=1, 359=1, 562=1, 749=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 381=1, 584=1, 746=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 80 ms. (steps per millisecond=125 ) properties (out of 12) seen :[4, 3, 4, 2, 2, 4, 3, 1, 1, 3, 2, 2]
Current structural bounds on expressions (after cover walk) : Max Seen:[31, 86, 970, 157, 220, 318, 185, 66, 174, 261, 160, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:23:04] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:23:04] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[31, 86, 970, 157, 220, 318, 185, 66, 174, 261, 160, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 2995 ms. (333 steps per ms)
BEST_FIRST walk for 12000012 steps (24 resets) in 13313 ms. (901 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[34, 86, 970, 157, 220, 318, 219, 66, 174, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:23:20] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:23:20] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:20] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:23:20] [INFO ] [Real]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:23:20] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:23:20] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:23:20] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:20] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:23:20] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:23:21] [INFO ] [Nat]Added 96 Read/Feed constraints in 47 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:23:21] [INFO ] Deduced a trap composed of 77 places in 253 ms of which 38 ms to minimize.
[2026-05-25 11:23:21] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 304 ms
[2026-05-25 11:23:21] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 77 ms.
[2026-05-25 11:23:21] [INFO ] Added : 2 causal constraints over 1 iterations in 167 ms. Result :sat
Minimization took 303 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:21] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:22] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:23:22] [INFO ] [Real]Added 96 Read/Feed constraints in 41 ms returned sat
[2026-05-25 11:23:22] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:22] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:23:22] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:23:22] [INFO ] [Nat]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:23:22] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:23:22] [INFO ] Added : 10 causal constraints over 4 iterations in 249 ms. Result :sat
Minimization took 248 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:22] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:23] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:23:23] [INFO ] [Real]Added 96 Read/Feed constraints in 22 ms returned sat
[2026-05-25 11:23:23] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:23] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:23] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:23:23] [INFO ] [Nat]Added 96 Read/Feed constraints in 20 ms returned sat
[2026-05-25 11:23:23] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 72 ms.
[2026-05-25 11:23:23] [INFO ] Added : 1 causal constraints over 1 iterations in 153 ms. Result :sat
Minimization took 238 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:23] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:24] [INFO ] [Real]Absence check using state equation in 135 ms returned sat
[2026-05-25 11:23:24] [INFO ] [Real]Added 96 Read/Feed constraints in 40 ms returned sat
[2026-05-25 11:23:24] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:24] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:23:24] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:23:24] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:23:24] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:23:24] [INFO ] Added : 1 causal constraints over 1 iterations in 160 ms. Result :sat
Minimization took 247 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:24] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:25] [INFO ] [Real]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:23:25] [INFO ] [Real]Added 96 Read/Feed constraints in 63 ms returned sat
[2026-05-25 11:23:25] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:25] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:25] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:23:25] [INFO ] [Nat]Added 96 Read/Feed constraints in 52 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:23:25] [INFO ] Deduced a trap composed of 77 places in 256 ms of which 45 ms to minimize.
[2026-05-25 11:23:25] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 310 ms
[2026-05-25 11:23:25] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:23:26] [INFO ] Added : 12 causal constraints over 4 iterations in 264 ms. Result :sat
Minimization took 249 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:26] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:26] [INFO ] [Real]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:23:26] [INFO ] [Real]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:23:26] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:26] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:23:26] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:23:26] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:23:27] [INFO ] Deduced a trap composed of 77 places in 265 ms of which 45 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:23:27] [INFO ] Deduced a trap composed of 77 places in 247 ms of which 45 ms to minimize.
[2026-05-25 11:23:27] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 603 ms
[2026-05-25 11:23:27] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 87 ms.
[2026-05-25 11:23:27] [INFO ] Added : 6 causal constraints over 3 iterations in 253 ms. Result :sat
Minimization took 254 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:28] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:23:28] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:23:28] [INFO ] [Real]Added 96 Read/Feed constraints in 40 ms returned sat
[2026-05-25 11:23:28] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:28] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:23:28] [INFO ] [Nat]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:23:28] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:23:28] [INFO ] Deduced a trap composed of 77 places in 251 ms of which 45 ms to minimize.
[2026-05-25 11:23:28] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 322 ms
[2026-05-25 11:23:28] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:23:29] [INFO ] Added : 5 causal constraints over 3 iterations in 245 ms. Result :sat
Minimization took 348 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:29] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:29] [INFO ] [Real]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:23:29] [INFO ] [Real]Added 96 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:23:29] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:29] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:29] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:23:29] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:23:30] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:23:30] [INFO ] Added : 3 causal constraints over 1 iterations in 175 ms. Result :sat
Minimization took 251 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:30] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:23:30] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:23:30] [INFO ] [Real]Added 96 Read/Feed constraints in 42 ms returned sat
[2026-05-25 11:23:30] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:30] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:23:30] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:23:30] [INFO ] [Nat]Added 96 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:23:31] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 70 ms.
[2026-05-25 11:23:31] [INFO ] Added : 3 causal constraints over 1 iterations in 166 ms. Result :sat
Minimization took 245 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:31] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:31] [INFO ] [Real]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:23:31] [INFO ] [Real]Added 96 Read/Feed constraints in 42 ms returned sat
[2026-05-25 11:23:31] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:31] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:31] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:23:31] [INFO ] [Nat]Added 96 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:23:32] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 72 ms.
[2026-05-25 11:23:32] [INFO ] Added : 1 causal constraints over 1 iterations in 158 ms. Result :sat
Minimization took 245 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:32] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:32] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:23:32] [INFO ] [Real]Added 96 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:23:32] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:32] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:32] [INFO ] [Nat]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:23:32] [INFO ] [Nat]Added 96 Read/Feed constraints in 23 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:23:33] [INFO ] Deduced a trap composed of 77 places in 235 ms of which 38 ms to minimize.
[2026-05-25 11:23:33] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 287 ms
[2026-05-25 11:23:33] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 72 ms.
[2026-05-25 11:23:33] [INFO ] Added : 1 causal constraints over 1 iterations in 164 ms. Result :sat
Minimization took 247 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:33] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:33] [INFO ] [Real]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:23:33] [INFO ] [Real]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:23:33] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:23:34] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:23:34] [INFO ] [Nat]Absence check using state equation in 136 ms returned sat
[2026-05-25 11:23:34] [INFO ] [Nat]Added 96 Read/Feed constraints in 26 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:23:34] [INFO ] Deduced a trap composed of 77 places in 257 ms of which 45 ms to minimize.
[2026-05-25 11:23:34] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 309 ms
[2026-05-25 11:23:34] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 67 ms.
[2026-05-25 11:23:34] [INFO ] Added : 5 causal constraints over 3 iterations in 353 ms. Result :sat
Minimization took 319 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[34, 86, 970, 157, 220, 318, 219, 66, 174, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[34, 86, 970, 157, 220, 318, 219, 66, 174, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 51 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 52 ms. Remains : 463/463 places, 1315/1315 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 50 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
[2026-05-25 11:23:41] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:23:41] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:23:41] [INFO ] Implicit Places using invariants in 305 ms returned []
[2026-05-25 11:23:41] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:23:41] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:23:41] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:23:43] [INFO ] Implicit Places using invariants and state equation in 1571 ms returned []
Implicit Place search using SMT with State Equation took 1878 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:23:43] [INFO ] Redundant transitions in 28 ms returned []
Running 1313 sub problems to find dead transitions.
[2026-05-25 11:23:43] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:23:43] [INFO ] Invariant cache hit.
[2026-05-25 11:23:43] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:23:55] [INFO ] Deduced a trap composed of 131 places in 117 ms of which 4 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 463/1224 variables, and 4 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30022 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/463 constraints, ReadFeed: 0/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/463 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 3 (OVERLAPS) 761/1224 variables, 463/467 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1224 variables, 96/563 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 1876 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30925 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62607ms problems are : Problem set: 0 solved, 1313 unsolved
Search for dead transitions found 0 dead transitions in 62609ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64571 ms. Remains : 463/463 places, 1315/1315 transitions.
[2026-05-25 11:24:45] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {230=1, 359=1, 562=1, 749=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {252=1, 381=1, 584=1, 746=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 75 ms. (steps per millisecond=133 ) properties (out of 12) seen :[2, 1, 0, 0, 2, 1, 0, 3, 3, 0, 2, 2]
Current structural bounds on expressions (after cover walk) : Max Seen:[34, 86, 970, 157, 220, 318, 219, 66, 174, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:24:46] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:24:46] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[34, 86, 970, 157, 220, 318, 219, 66, 174, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 2947 ms. (339 steps per ms)
BEST_FIRST walk for 12000012 steps (24 resets) in 14963 ms. (801 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[34, 86, 970, 157, 506, 318, 219, 66, 244, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:25:03] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:25:03] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:04] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:04] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:25:04] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:25:04] [INFO ] [Real]Added 96 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:25:04] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:04] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:25:04] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:25:04] [INFO ] [Nat]Added 96 Read/Feed constraints in 42 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:25:04] [INFO ] Deduced a trap composed of 77 places in 251 ms of which 41 ms to minimize.
[2026-05-25 11:25:04] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 312 ms
[2026-05-25 11:25:04] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 80 ms.
[2026-05-25 11:25:04] [INFO ] Added : 2 causal constraints over 1 iterations in 177 ms. Result :sat
Minimization took 301 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:05] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:05] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:25:05] [INFO ] [Real]Added 96 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:25:05] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:05] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:25:05] [INFO ] [Nat]Absence check using state equation in 136 ms returned sat
[2026-05-25 11:25:05] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:25:05] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 82 ms.
[2026-05-25 11:25:06] [INFO ] Added : 10 causal constraints over 4 iterations in 262 ms. Result :sat
Minimization took 248 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:06] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:06] [INFO ] [Real]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:25:06] [INFO ] [Real]Added 96 Read/Feed constraints in 22 ms returned sat
[2026-05-25 11:25:06] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:06] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:25:06] [INFO ] [Nat]Absence check using state equation in 162 ms returned sat
[2026-05-25 11:25:06] [INFO ] [Nat]Added 96 Read/Feed constraints in 21 ms returned sat
[2026-05-25 11:25:07] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 86 ms.
[2026-05-25 11:25:07] [INFO ] Added : 1 causal constraints over 1 iterations in 177 ms. Result :sat
Minimization took 289 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:07] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:07] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:25:07] [INFO ] [Real]Added 96 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:25:07] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:07] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:07] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:25:07] [INFO ] [Nat]Added 96 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:25:08] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 80 ms.
[2026-05-25 11:25:08] [INFO ] Added : 1 causal constraints over 1 iterations in 164 ms. Result :sat
Minimization took 296 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:08] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:08] [INFO ] [Real]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:25:08] [INFO ] [Real]Added 96 Read/Feed constraints in 63 ms returned sat
[2026-05-25 11:25:08] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:08] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:09] [INFO ] [Nat]Absence check using state equation in 135 ms returned sat
[2026-05-25 11:25:09] [INFO ] [Nat]Added 96 Read/Feed constraints in 48 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:25:09] [INFO ] Deduced a trap composed of 77 places in 264 ms of which 46 ms to minimize.
[2026-05-25 11:25:09] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 323 ms
[2026-05-25 11:25:09] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 89 ms.
[2026-05-25 11:25:09] [INFO ] Added : 12 causal constraints over 4 iterations in 286 ms. Result :sat
Minimization took 303 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:10] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:10] [INFO ] [Real]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:25:10] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:25:10] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:10] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:10] [INFO ] [Nat]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:25:10] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:25:10] [INFO ] Deduced a trap composed of 77 places in 279 ms of which 46 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:25:11] [INFO ] Deduced a trap composed of 77 places in 263 ms of which 46 ms to minimize.
[2026-05-25 11:25:11] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 650 ms
[2026-05-25 11:25:11] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 88 ms.
[2026-05-25 11:25:11] [INFO ] Added : 6 causal constraints over 3 iterations in 244 ms. Result :sat
Minimization took 260 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:11] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:11] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:25:12] [INFO ] [Real]Added 96 Read/Feed constraints in 40 ms returned sat
[2026-05-25 11:25:12] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:12] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:25:12] [INFO ] [Nat]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:25:12] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:25:12] [INFO ] Deduced a trap composed of 77 places in 269 ms of which 45 ms to minimize.
[2026-05-25 11:25:12] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 349 ms
[2026-05-25 11:25:12] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 81 ms.
[2026-05-25 11:25:12] [INFO ] Added : 5 causal constraints over 3 iterations in 258 ms. Result :sat
Minimization took 354 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:13] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:13] [INFO ] [Real]Absence check using state equation in 159 ms returned sat
[2026-05-25 11:25:13] [INFO ] [Real]Added 96 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:25:13] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:13] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:13] [INFO ] [Nat]Absence check using state equation in 165 ms returned sat
[2026-05-25 11:25:13] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:25:13] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 81 ms.
[2026-05-25 11:25:14] [INFO ] Added : 3 causal constraints over 1 iterations in 187 ms. Result :sat
Minimization took 247 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:14] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:25:14] [INFO ] [Real]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:25:14] [INFO ] [Real]Added 96 Read/Feed constraints in 41 ms returned sat
[2026-05-25 11:25:14] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:14] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:14] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:25:14] [INFO ] [Nat]Added 96 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:25:14] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 81 ms.
[2026-05-25 11:25:15] [INFO ] Added : 3 causal constraints over 1 iterations in 177 ms. Result :sat
Minimization took 249 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:15] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:25:15] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:25:15] [INFO ] [Real]Added 96 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:25:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:15] [INFO ] [Nat]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:25:15] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:25:16] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 82 ms.
[2026-05-25 11:25:16] [INFO ] Added : 1 causal constraints over 1 iterations in 173 ms. Result :sat
Minimization took 255 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:16] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:16] [INFO ] [Real]Absence check using state equation in 159 ms returned sat
[2026-05-25 11:25:16] [INFO ] [Real]Added 96 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:25:16] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:16] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:25:16] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:25:16] [INFO ] [Nat]Added 96 Read/Feed constraints in 23 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:25:17] [INFO ] Deduced a trap composed of 77 places in 272 ms of which 39 ms to minimize.
[2026-05-25 11:25:17] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 327 ms
[2026-05-25 11:25:17] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 87 ms.
[2026-05-25 11:25:17] [INFO ] Added : 1 causal constraints over 1 iterations in 172 ms. Result :sat
Minimization took 243 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:17] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:25:17] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:25:17] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:25:17] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:25:18] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:25:18] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:25:18] [INFO ] [Nat]Added 96 Read/Feed constraints in 27 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:25:18] [INFO ] Deduced a trap composed of 77 places in 247 ms of which 44 ms to minimize.
[2026-05-25 11:25:18] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 314 ms
[2026-05-25 11:25:18] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 85 ms.
[2026-05-25 11:25:18] [INFO ] Added : 5 causal constraints over 3 iterations in 358 ms. Result :sat
Minimization took 314 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[34, 86, 970, 157, 506, 318, 219, 66, 244, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[34, 86, 970, 157, 506, 318, 219, 66, 244, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 50 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 50 ms. Remains : 463/463 places, 1315/1315 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 52 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
[2026-05-25 11:25:27] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:25:27] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:25:28] [INFO ] Implicit Places using invariants in 326 ms returned []
[2026-05-25 11:25:28] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:25:28] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:25:28] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:25:29] [INFO ] Implicit Places using invariants and state equation in 1575 ms returned []
Implicit Place search using SMT with State Equation took 1903 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:25:29] [INFO ] Redundant transitions in 32 ms returned []
Running 1313 sub problems to find dead transitions.
[2026-05-25 11:25:29] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:25:29] [INFO ] Invariant cache hit.
[2026-05-25 11:25:29] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:25:42] [INFO ] Deduced a trap composed of 131 places in 126 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 463/1224 variables, and 4 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30020 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/463 constraints, ReadFeed: 0/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/463 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 3 (OVERLAPS) 761/1224 variables, 463/467 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1224 variables, 96/563 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 1876 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30935 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 63027ms problems are : Problem set: 0 solved, 1313 unsolved
Search for dead transitions found 0 dead transitions in 63029ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65027 ms. Remains : 463/463 places, 1315/1315 transitions.
[2026-05-25 11:26:32] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {230=1, 359=1, 562=1, 749=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 381=1, 584=1, 746=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 79 ms. (steps per millisecond=126 ) properties (out of 12) seen :[2, 1, 5, 0, 0, 2, 3, 2, 1, 2, 3, 0]
Current structural bounds on expressions (after cover walk) : Max Seen:[34, 86, 970, 157, 506, 318, 219, 66, 244, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:26:33] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:26:33] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[34, 86, 970, 157, 506, 318, 219, 66, 244, 261, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 3004 ms. (332 steps per ms)
BEST_FIRST walk for 12000012 steps (24 resets) in 14394 ms. (833 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[34, 86, 1179, 194, 506, 318, 219, 66, 244, 266, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:26:50] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:26:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:50] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:26:50] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:26:50] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:26:50] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:26:50] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:50] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:51] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:26:51] [INFO ] [Nat]Added 96 Read/Feed constraints in 39 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:26:51] [INFO ] Deduced a trap composed of 77 places in 246 ms of which 38 ms to minimize.
[2026-05-25 11:26:51] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 301 ms
[2026-05-25 11:26:51] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 79 ms.
[2026-05-25 11:26:51] [INFO ] Added : 2 causal constraints over 1 iterations in 166 ms. Result :sat
Minimization took 303 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:51] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:52] [INFO ] [Real]Absence check using state equation in 137 ms returned sat
[2026-05-25 11:26:52] [INFO ] [Real]Added 96 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:26:52] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:52] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:26:52] [INFO ] [Nat]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:26:52] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:26:52] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:26:52] [INFO ] Added : 10 causal constraints over 4 iterations in 254 ms. Result :sat
Minimization took 237 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:53] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:53] [INFO ] [Real]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:26:53] [INFO ] [Real]Added 96 Read/Feed constraints in 22 ms returned sat
[2026-05-25 11:26:53] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:53] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:26:53] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:26:53] [INFO ] [Nat]Added 96 Read/Feed constraints in 20 ms returned sat
[2026-05-25 11:26:53] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 85 ms.
[2026-05-25 11:26:53] [INFO ] Added : 1 causal constraints over 1 iterations in 172 ms. Result :sat
Minimization took 231 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:53] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:54] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:26:54] [INFO ] [Real]Added 96 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:26:54] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:54] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:54] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:26:54] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:26:54] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:26:54] [INFO ] Added : 1 causal constraints over 1 iterations in 165 ms. Result :sat
Minimization took 235 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:54] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:55] [INFO ] [Real]Absence check using state equation in 138 ms returned sat
[2026-05-25 11:26:55] [INFO ] [Real]Added 96 Read/Feed constraints in 62 ms returned sat
[2026-05-25 11:26:55] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:55] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:26:55] [INFO ] [Nat]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:26:55] [INFO ] [Nat]Added 96 Read/Feed constraints in 47 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:26:55] [INFO ] Deduced a trap composed of 77 places in 256 ms of which 45 ms to minimize.
[2026-05-25 11:26:55] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 305 ms
[2026-05-25 11:26:55] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:26:56] [INFO ] Added : 12 causal constraints over 4 iterations in 276 ms. Result :sat
Minimization took 263 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:56] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:56] [INFO ] [Real]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:26:56] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:26:56] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:56] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:56] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:26:56] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:26:57] [INFO ] Deduced a trap composed of 77 places in 256 ms of which 44 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:26:57] [INFO ] Deduced a trap composed of 77 places in 259 ms of which 45 ms to minimize.
[2026-05-25 11:26:57] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 625 ms
[2026-05-25 11:26:57] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 71 ms.
[2026-05-25 11:26:57] [INFO ] Added : 6 causal constraints over 3 iterations in 231 ms. Result :sat
Minimization took 253 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:58] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:58] [INFO ] [Real]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:26:58] [INFO ] [Real]Added 96 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:26:58] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:58] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:58] [INFO ] [Nat]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:26:58] [INFO ] [Nat]Added 96 Read/Feed constraints in 27 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:26:58] [INFO ] Deduced a trap composed of 77 places in 244 ms of which 44 ms to minimize.
[2026-05-25 11:26:58] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 336 ms
[2026-05-25 11:26:58] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 77 ms.
[2026-05-25 11:26:59] [INFO ] Added : 5 causal constraints over 3 iterations in 247 ms. Result :sat
Minimization took 415 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:59] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:26:59] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:26:59] [INFO ] [Real]Added 96 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:26:59] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:26:59] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:27:00] [INFO ] [Nat]Absence check using state equation in 166 ms returned sat
[2026-05-25 11:27:00] [INFO ] [Nat]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:27:00] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:27:00] [INFO ] Added : 3 causal constraints over 1 iterations in 178 ms. Result :sat
Minimization took 307 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:27:00] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:27:00] [INFO ] [Real]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:27:00] [INFO ] [Real]Added 96 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:27:00] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:27:00] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:27:01] [INFO ] [Nat]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:27:01] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:27:01] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 73 ms.
[2026-05-25 11:27:01] [INFO ] Added : 3 causal constraints over 1 iterations in 168 ms. Result :sat
Minimization took 237 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:27:01] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:27:01] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:27:01] [INFO ] [Real]Added 96 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:27:01] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:27:01] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:27:02] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:27:02] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:27:02] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:27:02] [INFO ] Added : 1 causal constraints over 1 iterations in 165 ms. Result :sat
Minimization took 241 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:27:02] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:27:02] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:27:02] [INFO ] [Real]Added 96 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:27:02] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:27:02] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:27:03] [INFO ] [Nat]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:27:03] [INFO ] [Nat]Added 96 Read/Feed constraints in 22 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:27:03] [INFO ] Deduced a trap composed of 77 places in 258 ms of which 39 ms to minimize.
[2026-05-25 11:27:03] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 311 ms
[2026-05-25 11:27:03] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 84 ms.
[2026-05-25 11:27:03] [INFO ] Added : 1 causal constraints over 1 iterations in 176 ms. Result :sat
Minimization took 252 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:27:03] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:27:04] [INFO ] [Real]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:27:04] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:27:04] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:27:04] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:27:04] [INFO ] [Nat]Absence check using state equation in 133 ms returned sat
[2026-05-25 11:27:04] [INFO ] [Nat]Added 96 Read/Feed constraints in 27 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:27:04] [INFO ] Deduced a trap composed of 77 places in 247 ms of which 44 ms to minimize.
[2026-05-25 11:27:04] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 317 ms
[2026-05-25 11:27:04] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:27:05] [INFO ] Added : 5 causal constraints over 3 iterations in 351 ms. Result :sat
Minimization took 325 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[34, 86, 1179, 194, 506, 318, 219, 66, 244, 266, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[34, 86, 1179, 194, 506, 318, 219, 66, 244, 266, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 51 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 52 ms. Remains : 463/463 places, 1315/1315 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 50 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
[2026-05-25 11:27:13] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:27:13] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:27:13] [INFO ] Implicit Places using invariants in 320 ms returned []
[2026-05-25 11:27:13] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:27:13] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:27:14] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:27:15] [INFO ] Implicit Places using invariants and state equation in 1649 ms returned []
Implicit Place search using SMT with State Equation took 1973 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:27:15] [INFO ] Redundant transitions in 30 ms returned []
Running 1313 sub problems to find dead transitions.
[2026-05-25 11:27:15] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:27:15] [INFO ] Invariant cache hit.
[2026-05-25 11:27:15] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:27:28] [INFO ] Deduced a trap composed of 131 places in 124 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 463/1224 variables, and 4 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30022 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/463 constraints, ReadFeed: 0/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/463 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 3 (OVERLAPS) 761/1224 variables, 463/467 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1224 variables, 96/563 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 1876 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30872 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62708ms problems are : Problem set: 0 solved, 1313 unsolved
Search for dead transitions found 0 dead transitions in 62710ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64771 ms. Remains : 463/463 places, 1315/1315 transitions.
[2026-05-25 11:28:18] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {230=1, 359=1, 562=1, 749=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 381=1, 584=1, 746=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 74 ms. (steps per millisecond=135 ) properties (out of 12) seen :[2, 3, 0, 1, 0, 2, 2, 1, 2, 2, 2, 0]
Current structural bounds on expressions (after cover walk) : Max Seen:[34, 86, 1179, 194, 506, 318, 219, 66, 244, 266, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:28:18] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:28:18] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[34, 86, 1179, 194, 506, 318, 219, 66, 244, 266, 496, 294] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 2943 ms. (339 steps per ms)
BEST_FIRST walk for 12000012 steps (24 resets) in 13657 ms. (878 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[34, 100, 1179, 194, 506, 318, 219, 79, 244, 266, 496, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:28:35] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:28:35] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:35] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:28:35] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:28:35] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:28:35] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:28:35] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:35] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:35] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:28:35] [INFO ] [Nat]Added 96 Read/Feed constraints in 41 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:28:36] [INFO ] Deduced a trap composed of 77 places in 253 ms of which 39 ms to minimize.
[2026-05-25 11:28:36] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 300 ms
[2026-05-25 11:28:36] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 71 ms.
[2026-05-25 11:28:36] [INFO ] Added : 2 causal constraints over 1 iterations in 168 ms. Result :sat
Minimization took 299 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:36] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:36] [INFO ] [Real]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:28:36] [INFO ] [Real]Added 96 Read/Feed constraints in 40 ms returned sat
[2026-05-25 11:28:36] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:36] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:37] [INFO ] [Nat]Absence check using state equation in 134 ms returned sat
[2026-05-25 11:28:37] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:28:37] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 82 ms.
[2026-05-25 11:28:37] [INFO ] Added : 10 causal constraints over 4 iterations in 252 ms. Result :sat
Minimization took 244 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:37] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:37] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:28:37] [INFO ] [Real]Added 96 Read/Feed constraints in 22 ms returned sat
[2026-05-25 11:28:37] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:37] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:38] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:28:38] [INFO ] [Nat]Added 96 Read/Feed constraints in 20 ms returned sat
[2026-05-25 11:28:38] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 72 ms.
[2026-05-25 11:28:38] [INFO ] Added : 1 causal constraints over 1 iterations in 148 ms. Result :sat
Minimization took 228 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:38] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:38] [INFO ] [Real]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:28:38] [INFO ] [Real]Added 96 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:28:38] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:38] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:28:39] [INFO ] [Nat]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:28:39] [INFO ] [Nat]Added 96 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:28:39] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 73 ms.
[2026-05-25 11:28:39] [INFO ] Added : 1 causal constraints over 1 iterations in 165 ms. Result :sat
Minimization took 247 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:39] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:39] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:28:39] [INFO ] [Real]Added 96 Read/Feed constraints in 75 ms returned sat
[2026-05-25 11:28:39] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:39] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:40] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:28:40] [INFO ] [Nat]Added 96 Read/Feed constraints in 46 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:28:40] [INFO ] Deduced a trap composed of 77 places in 261 ms of which 45 ms to minimize.
[2026-05-25 11:28:40] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 311 ms
[2026-05-25 11:28:40] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 73 ms.
[2026-05-25 11:28:40] [INFO ] Added : 12 causal constraints over 4 iterations in 276 ms. Result :sat
Minimization took 255 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:41] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:41] [INFO ] [Real]Absence check using state equation in 154 ms returned sat
[2026-05-25 11:28:41] [INFO ] [Real]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:28:41] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:41] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:28:41] [INFO ] [Nat]Absence check using state equation in 135 ms returned sat
[2026-05-25 11:28:41] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:28:41] [INFO ] Deduced a trap composed of 77 places in 238 ms of which 44 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:28:41] [INFO ] Deduced a trap composed of 77 places in 235 ms of which 44 ms to minimize.
[2026-05-25 11:28:42] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 564 ms
[2026-05-25 11:28:42] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 79 ms.
[2026-05-25 11:28:42] [INFO ] Added : 6 causal constraints over 3 iterations in 241 ms. Result :sat
Minimization took 248 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:42] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:42] [INFO ] [Real]Absence check using state equation in 189 ms returned sat
[2026-05-25 11:28:42] [INFO ] [Real]Added 96 Read/Feed constraints in 53 ms returned sat
[2026-05-25 11:28:42] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:42] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:43] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:28:43] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:28:43] [INFO ] Deduced a trap composed of 77 places in 237 ms of which 43 ms to minimize.
[2026-05-25 11:28:43] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 302 ms
[2026-05-25 11:28:43] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:28:43] [INFO ] Added : 5 causal constraints over 3 iterations in 232 ms. Result :sat
Minimization took 355 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:44] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:44] [INFO ] [Real]Absence check using state equation in 137 ms returned sat
[2026-05-25 11:28:44] [INFO ] [Real]Added 96 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:28:44] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:44] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:28:44] [INFO ] [Nat]Absence check using state equation in 134 ms returned sat
[2026-05-25 11:28:44] [INFO ] [Nat]Added 96 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:28:44] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 70 ms.
[2026-05-25 11:28:44] [INFO ] Added : 3 causal constraints over 1 iterations in 163 ms. Result :sat
Minimization took 242 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:45] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:45] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:28:45] [INFO ] [Real]Added 96 Read/Feed constraints in 42 ms returned sat
[2026-05-25 11:28:45] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:45] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:28:45] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:28:45] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:28:45] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 72 ms.
[2026-05-25 11:28:45] [INFO ] Added : 3 causal constraints over 1 iterations in 189 ms. Result :sat
Minimization took 263 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:46] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:46] [INFO ] [Real]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:28:46] [INFO ] [Real]Added 96 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:28:46] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:46] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:46] [INFO ] [Nat]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:28:46] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:28:46] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 73 ms.
[2026-05-25 11:28:46] [INFO ] Added : 1 causal constraints over 1 iterations in 156 ms. Result :sat
Minimization took 245 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:47] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:47] [INFO ] [Real]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:28:47] [INFO ] [Real]Added 96 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:28:47] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:47] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:47] [INFO ] [Nat]Absence check using state equation in 137 ms returned sat
[2026-05-25 11:28:47] [INFO ] [Nat]Added 96 Read/Feed constraints in 26 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:28:47] [INFO ] Deduced a trap composed of 77 places in 260 ms of which 38 ms to minimize.
[2026-05-25 11:28:47] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 306 ms
[2026-05-25 11:28:47] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:28:48] [INFO ] Added : 1 causal constraints over 1 iterations in 160 ms. Result :sat
Minimization took 233 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:48] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:48] [INFO ] [Real]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:28:48] [INFO ] [Real]Added 96 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:28:48] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:28:48] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:28:48] [INFO ] [Nat]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:28:48] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:28:49] [INFO ] Deduced a trap composed of 77 places in 248 ms of which 45 ms to minimize.
[2026-05-25 11:28:49] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 303 ms
[2026-05-25 11:28:49] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 84 ms.
[2026-05-25 11:28:49] [INFO ] Added : 5 causal constraints over 3 iterations in 342 ms. Result :sat
Minimization took 306 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[34, 100, 1179, 194, 506, 318, 219, 79, 244, 266, 496, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[34, 100, 1179, 194, 506, 318, 219, 79, 244, 266, 496, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 50 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 51 ms. Remains : 463/463 places, 1315/1315 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 49 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
[2026-05-25 11:28:58] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:28:58] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:28:59] [INFO ] Implicit Places using invariants in 302 ms returned []
[2026-05-25 11:28:59] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:28:59] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:28:59] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:29:00] [INFO ] Implicit Places using invariants and state equation in 1581 ms returned []
Implicit Place search using SMT with State Equation took 1884 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:29:00] [INFO ] Redundant transitions in 28 ms returned []
Running 1313 sub problems to find dead transitions.
[2026-05-25 11:29:00] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:29:00] [INFO ] Invariant cache hit.
[2026-05-25 11:29:00] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:29:12] [INFO ] Deduced a trap composed of 131 places in 123 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 463/1224 variables, and 4 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30027 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/463 constraints, ReadFeed: 0/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/463 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 3 (OVERLAPS) 761/1224 variables, 463/467 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1224 variables, 96/563 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 1876 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30861 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62758ms problems are : Problem set: 0 solved, 1313 unsolved
Search for dead transitions found 0 dead transitions in 62760ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64728 ms. Remains : 463/463 places, 1315/1315 transitions.
[2026-05-25 11:30:03] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {230=1, 359=1, 562=1, 749=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {252=1, 381=1, 584=1, 746=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 82 ms. (steps per millisecond=121 ) properties (out of 12) seen :[1, 0, 0, 2, 4, 0, 2, 1, 2, 4, 3, 3]
Current structural bounds on expressions (after cover walk) : Max Seen:[34, 100, 1179, 194, 506, 318, 219, 79, 244, 266, 496, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:30:03] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:30:03] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[34, 100, 1179, 194, 506, 318, 219, 79, 244, 266, 496, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 2822 ms. (354 steps per ms)
BEST_FIRST walk for 12000012 steps (24 resets) in 14061 ms. (853 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[34, 100, 1179, 194, 506, 338, 219, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:30:20] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:30:20] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:20] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:30:20] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:30:20] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:30:20] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:30:20] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:20] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:30:21] [INFO ] [Nat]Absence check using state equation in 160 ms returned sat
[2026-05-25 11:30:21] [INFO ] [Nat]Added 96 Read/Feed constraints in 40 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:30:21] [INFO ] Deduced a trap composed of 77 places in 248 ms of which 38 ms to minimize.
[2026-05-25 11:30:21] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 310 ms
[2026-05-25 11:30:21] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 85 ms.
[2026-05-25 11:30:21] [INFO ] Added : 2 causal constraints over 1 iterations in 173 ms. Result :sat
Minimization took 308 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:22] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:22] [INFO ] [Real]Absence check using state equation in 173 ms returned sat
[2026-05-25 11:30:22] [INFO ] [Real]Added 96 Read/Feed constraints in 43 ms returned sat
[2026-05-25 11:30:22] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:22] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:30:22] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:30:22] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:30:22] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 78 ms.
[2026-05-25 11:30:22] [INFO ] Added : 10 causal constraints over 4 iterations in 266 ms. Result :sat
Minimization took 245 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:23] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:23] [INFO ] [Real]Absence check using state equation in 138 ms returned sat
[2026-05-25 11:30:23] [INFO ] [Real]Added 96 Read/Feed constraints in 22 ms returned sat
[2026-05-25 11:30:23] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:23] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:23] [INFO ] [Nat]Absence check using state equation in 134 ms returned sat
[2026-05-25 11:30:23] [INFO ] [Nat]Added 96 Read/Feed constraints in 20 ms returned sat
[2026-05-25 11:30:23] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:30:23] [INFO ] Added : 1 causal constraints over 1 iterations in 158 ms. Result :sat
Minimization took 244 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:24] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:24] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:30:24] [INFO ] [Real]Added 96 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:30:24] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:24] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:30:24] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:30:24] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:30:24] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:30:24] [INFO ] Added : 1 causal constraints over 1 iterations in 159 ms. Result :sat
Minimization took 283 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:25] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:25] [INFO ] [Real]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:30:25] [INFO ] [Real]Added 96 Read/Feed constraints in 66 ms returned sat
[2026-05-25 11:30:25] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:25] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:25] [INFO ] [Nat]Absence check using state equation in 135 ms returned sat
[2026-05-25 11:30:25] [INFO ] [Nat]Added 96 Read/Feed constraints in 48 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:30:25] [INFO ] Deduced a trap composed of 77 places in 267 ms of which 44 ms to minimize.
[2026-05-25 11:30:26] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 327 ms
[2026-05-25 11:30:26] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 82 ms.
[2026-05-25 11:30:26] [INFO ] Added : 12 causal constraints over 4 iterations in 271 ms. Result :sat
Minimization took 245 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:26] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:26] [INFO ] [Real]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:30:26] [INFO ] [Real]Added 96 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:30:26] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:26] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:27] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:30:27] [INFO ] [Nat]Added 96 Read/Feed constraints in 32 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:30:27] [INFO ] Deduced a trap composed of 77 places in 252 ms of which 45 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:30:27] [INFO ] Deduced a trap composed of 77 places in 249 ms of which 45 ms to minimize.
[2026-05-25 11:30:27] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 618 ms
[2026-05-25 11:30:27] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 78 ms.
[2026-05-25 11:30:27] [INFO ] Added : 6 causal constraints over 3 iterations in 235 ms. Result :sat
Minimization took 252 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:28] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:28] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:30:28] [INFO ] [Real]Added 96 Read/Feed constraints in 40 ms returned sat
[2026-05-25 11:30:28] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:28] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:28] [INFO ] [Nat]Absence check using state equation in 146 ms returned sat
[2026-05-25 11:30:28] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:30:29] [INFO ] Deduced a trap composed of 77 places in 247 ms of which 45 ms to minimize.
[2026-05-25 11:30:29] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 327 ms
[2026-05-25 11:30:29] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 78 ms.
[2026-05-25 11:30:29] [INFO ] Added : 5 causal constraints over 3 iterations in 255 ms. Result :sat
Minimization took 341 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:29] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:29] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:30:29] [INFO ] [Real]Added 96 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:30:29] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:30] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:30] [INFO ] [Nat]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:30:30] [INFO ] [Nat]Added 96 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:30:30] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 79 ms.
[2026-05-25 11:30:30] [INFO ] Added : 3 causal constraints over 1 iterations in 173 ms. Result :sat
Minimization took 306 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:30] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:30] [INFO ] [Real]Absence check using state equation in 162 ms returned sat
[2026-05-25 11:30:31] [INFO ] [Real]Added 96 Read/Feed constraints in 42 ms returned sat
[2026-05-25 11:30:31] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:31] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:30:31] [INFO ] [Nat]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:30:31] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:30:31] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 84 ms.
[2026-05-25 11:30:31] [INFO ] Added : 3 causal constraints over 1 iterations in 191 ms. Result :sat
Minimization took 245 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:31] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:32] [INFO ] [Real]Absence check using state equation in 157 ms returned sat
[2026-05-25 11:30:32] [INFO ] [Real]Added 96 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:30:32] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:32] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:30:32] [INFO ] [Nat]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:30:32] [INFO ] [Nat]Added 96 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:30:32] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 82 ms.
[2026-05-25 11:30:32] [INFO ] Added : 1 causal constraints over 1 iterations in 165 ms. Result :sat
Minimization took 288 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:32] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:33] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:30:33] [INFO ] [Real]Added 96 Read/Feed constraints in 24 ms returned sat
[2026-05-25 11:30:33] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:33] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:30:33] [INFO ] [Nat]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:30:33] [INFO ] [Nat]Added 96 Read/Feed constraints in 24 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:30:33] [INFO ] Deduced a trap composed of 77 places in 253 ms of which 38 ms to minimize.
[2026-05-25 11:30:33] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 312 ms
[2026-05-25 11:30:33] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 83 ms.
[2026-05-25 11:30:33] [INFO ] Added : 1 causal constraints over 1 iterations in 169 ms. Result :sat
Minimization took 287 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:34] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:30:34] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:30:34] [INFO ] [Real]Added 96 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:30:34] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:30:34] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:30:34] [INFO ] [Nat]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:30:34] [INFO ] [Nat]Added 96 Read/Feed constraints in 27 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:30:34] [INFO ] Deduced a trap composed of 77 places in 244 ms of which 45 ms to minimize.
[2026-05-25 11:30:35] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 312 ms
[2026-05-25 11:30:35] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 80 ms.
[2026-05-25 11:30:35] [INFO ] Added : 5 causal constraints over 3 iterations in 352 ms. Result :sat
Minimization took 349 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[34, 100, 1179, 194, 506, 338, 219, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[34, 100, 1179, 194, 506, 338, 219, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 51 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 52 ms. Remains : 463/463 places, 1315/1315 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 51 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
[2026-05-25 11:30:47] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:30:47] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:30:47] [INFO ] Implicit Places using invariants in 318 ms returned []
[2026-05-25 11:30:47] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:30:47] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:30:47] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:30:48] [INFO ] Implicit Places using invariants and state equation in 1644 ms returned []
Implicit Place search using SMT with State Equation took 1964 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:30:48] [INFO ] Redundant transitions in 29 ms returned []
Running 1313 sub problems to find dead transitions.
[2026-05-25 11:30:49] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:30:49] [INFO ] Invariant cache hit.
[2026-05-25 11:30:49] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:31:01] [INFO ] Deduced a trap composed of 131 places in 122 ms of which 4 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 463/1224 variables, and 4 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30022 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/463 constraints, ReadFeed: 0/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/463 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 3 (OVERLAPS) 761/1224 variables, 463/467 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1224 variables, 96/563 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 1876 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30882 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62713ms problems are : Problem set: 0 solved, 1313 unsolved
Search for dead transitions found 0 dead transitions in 62716ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64768 ms. Remains : 463/463 places, 1315/1315 transitions.
[2026-05-25 11:31:51] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {230=1, 359=1, 562=1, 749=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {252=1, 381=1, 584=1, 746=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 79 ms. (steps per millisecond=126 ) properties (out of 12) seen :[0, 2, 4, 2, 0, 4, 1, 2, 2, 2, 0, 0]
Current structural bounds on expressions (after cover walk) : Max Seen:[34, 100, 1179, 194, 506, 338, 219, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:31:52] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:31:52] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[34, 100, 1179, 194, 506, 338, 219, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 2983 ms. (335 steps per ms)
BEST_FIRST walk for 12000012 steps (24 resets) in 14593 ms. (822 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:32:09] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:32:09] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:09] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:09] [INFO ] [Real]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:32:09] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:32:09] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:32:09] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:10] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:10] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:32:10] [INFO ] [Nat]Added 96 Read/Feed constraints in 41 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:32:10] [INFO ] Deduced a trap composed of 77 places in 246 ms of which 39 ms to minimize.
[2026-05-25 11:32:10] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 309 ms
[2026-05-25 11:32:10] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:32:10] [INFO ] Added : 2 causal constraints over 1 iterations in 168 ms. Result :sat
Minimization took 306 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:11] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:11] [INFO ] [Real]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:32:11] [INFO ] [Real]Added 96 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:32:11] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:11] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:11] [INFO ] [Nat]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:32:11] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:32:11] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 73 ms.
[2026-05-25 11:32:11] [INFO ] Added : 10 causal constraints over 4 iterations in 268 ms. Result :sat
Minimization took 256 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:12] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:12] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:32:12] [INFO ] [Real]Added 96 Read/Feed constraints in 22 ms returned sat
[2026-05-25 11:32:12] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:12] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:32:12] [INFO ] [Nat]Absence check using state equation in 149 ms returned sat
[2026-05-25 11:32:12] [INFO ] [Nat]Added 96 Read/Feed constraints in 21 ms returned sat
[2026-05-25 11:32:12] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 73 ms.
[2026-05-25 11:32:12] [INFO ] Added : 1 causal constraints over 1 iterations in 157 ms. Result :sat
Minimization took 234 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:13] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:13] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:32:13] [INFO ] [Real]Added 96 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:32:13] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:13] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:13] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:32:13] [INFO ] [Nat]Added 96 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:32:13] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 71 ms.
[2026-05-25 11:32:13] [INFO ] Added : 1 causal constraints over 1 iterations in 152 ms. Result :sat
Minimization took 237 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:14] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:14] [INFO ] [Real]Absence check using state equation in 164 ms returned sat
[2026-05-25 11:32:14] [INFO ] [Real]Added 96 Read/Feed constraints in 66 ms returned sat
[2026-05-25 11:32:14] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:14] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:14] [INFO ] [Nat]Absence check using state equation in 145 ms returned sat
[2026-05-25 11:32:14] [INFO ] [Nat]Added 96 Read/Feed constraints in 48 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:32:14] [INFO ] Deduced a trap composed of 77 places in 259 ms of which 46 ms to minimize.
[2026-05-25 11:32:14] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 306 ms
[2026-05-25 11:32:14] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:32:15] [INFO ] Added : 12 causal constraints over 4 iterations in 295 ms. Result :sat
Minimization took 247 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:15] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:32:15] [INFO ] [Real]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:32:15] [INFO ] [Real]Added 96 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:32:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:15] [INFO ] [Nat]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:32:16] [INFO ] [Nat]Added 96 Read/Feed constraints in 32 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:32:16] [INFO ] Deduced a trap composed of 77 places in 245 ms of which 44 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:32:16] [INFO ] Deduced a trap composed of 77 places in 245 ms of which 45 ms to minimize.
[2026-05-25 11:32:16] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 583 ms
[2026-05-25 11:32:16] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 84 ms.
[2026-05-25 11:32:16] [INFO ] Added : 6 causal constraints over 3 iterations in 235 ms. Result :sat
Minimization took 258 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:17] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:32:17] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:32:17] [INFO ] [Real]Added 96 Read/Feed constraints in 44 ms returned sat
[2026-05-25 11:32:17] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:17] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:32:17] [INFO ] [Nat]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:32:17] [INFO ] [Nat]Added 96 Read/Feed constraints in 39 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:32:17] [INFO ] Deduced a trap composed of 77 places in 261 ms of which 45 ms to minimize.
[2026-05-25 11:32:17] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 341 ms
[2026-05-25 11:32:18] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 97 ms.
[2026-05-25 11:32:18] [INFO ] Added : 5 causal constraints over 3 iterations in 274 ms. Result :sat
Minimization took 351 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:18] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:18] [INFO ] [Real]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:32:18] [INFO ] [Real]Added 96 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:32:18] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:18] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:32:19] [INFO ] [Nat]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:32:19] [INFO ] [Nat]Added 96 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:32:19] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 85 ms.
[2026-05-25 11:32:19] [INFO ] Added : 3 causal constraints over 1 iterations in 190 ms. Result :sat
Minimization took 257 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:19] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:32:19] [INFO ] [Real]Absence check using state equation in 164 ms returned sat
[2026-05-25 11:32:19] [INFO ] [Real]Added 96 Read/Feed constraints in 41 ms returned sat
[2026-05-25 11:32:19] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:20] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:32:20] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:32:20] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:32:20] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 81 ms.
[2026-05-25 11:32:20] [INFO ] Added : 3 causal constraints over 1 iterations in 185 ms. Result :sat
Minimization took 260 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:20] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:20] [INFO ] [Real]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:32:20] [INFO ] [Real]Added 96 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:32:21] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:21] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:21] [INFO ] [Nat]Absence check using state equation in 132 ms returned sat
[2026-05-25 11:32:21] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:32:21] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 71 ms.
[2026-05-25 11:32:21] [INFO ] Added : 1 causal constraints over 1 iterations in 164 ms. Result :sat
Minimization took 249 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:21] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:21] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:32:21] [INFO ] [Real]Added 96 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:32:21] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:22] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:22] [INFO ] [Nat]Absence check using state equation in 136 ms returned sat
[2026-05-25 11:32:22] [INFO ] [Nat]Added 96 Read/Feed constraints in 22 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:32:22] [INFO ] Deduced a trap composed of 77 places in 249 ms of which 39 ms to minimize.
[2026-05-25 11:32:22] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 291 ms
[2026-05-25 11:32:22] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:32:22] [INFO ] Added : 1 causal constraints over 1 iterations in 168 ms. Result :sat
Minimization took 245 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:22] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:32:23] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:32:23] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:32:23] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:32:23] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:32:23] [INFO ] [Nat]Absence check using state equation in 153 ms returned sat
[2026-05-25 11:32:23] [INFO ] [Nat]Added 96 Read/Feed constraints in 27 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:32:23] [INFO ] Deduced a trap composed of 77 places in 258 ms of which 46 ms to minimize.
[2026-05-25 11:32:23] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 315 ms
[2026-05-25 11:32:23] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 85 ms.
[2026-05-25 11:32:24] [INFO ] Added : 5 causal constraints over 3 iterations in 360 ms. Result :sat
Minimization took 317 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 55 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 55 ms. Remains : 463/463 places, 1315/1315 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 51 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
[2026-05-25 11:32:36] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:32:36] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:32:36] [INFO ] Implicit Places using invariants in 318 ms returned []
[2026-05-25 11:32:36] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:32:36] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:32:36] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:32:38] [INFO ] Implicit Places using invariants and state equation in 1597 ms returned []
Implicit Place search using SMT with State Equation took 1916 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:32:38] [INFO ] Redundant transitions in 21 ms returned []
Running 1313 sub problems to find dead transitions.
[2026-05-25 11:32:38] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:32:38] [INFO ] Invariant cache hit.
[2026-05-25 11:32:38] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:32:50] [INFO ] Deduced a trap composed of 131 places in 138 ms of which 4 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 463/1224 variables, and 4 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30023 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/463 constraints, ReadFeed: 0/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/463 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 3 (OVERLAPS) 761/1224 variables, 463/467 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1224 variables, 96/563 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 1876 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 31011 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 63070ms problems are : Problem set: 0 solved, 1313 unsolved
Search for dead transitions found 0 dead transitions in 63072ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65067 ms. Remains : 463/463 places, 1315/1315 transitions.
[2026-05-25 11:33:41] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {230=1, 359=1, 562=1, 749=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 381=1, 584=1, 746=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 79 ms. (steps per millisecond=126 ) properties (out of 12) seen :[0, 1, 4, 2, 3, 1, 2, 2, 1, 2, 3, 3]
Current structural bounds on expressions (after cover walk) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:33:41] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:33:41] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 1000002 steps (2 resets) in 2979 ms. (335 steps per ms)
BEST_FIRST walk for 12000012 steps (24 resets) in 13862 ms. (865 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 11:33:58] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:33:58] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:33:58] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:33:58] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:33:58] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:33:58] [INFO ] [Real]Added 96 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:33:58] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:33:58] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:33:58] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:33:58] [INFO ] [Nat]Added 96 Read/Feed constraints in 42 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:33:59] [INFO ] Deduced a trap composed of 77 places in 227 ms of which 36 ms to minimize.
[2026-05-25 11:33:59] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 291 ms
[2026-05-25 11:33:59] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 77 ms.
[2026-05-25 11:33:59] [INFO ] Added : 2 causal constraints over 1 iterations in 162 ms. Result :sat
Minimization took 343 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:33:59] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:33:59] [INFO ] [Real]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:33:59] [INFO ] [Real]Added 96 Read/Feed constraints in 41 ms returned sat
[2026-05-25 11:34:00] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:00] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:00] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:34:00] [INFO ] [Nat]Added 96 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:34:00] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 74 ms.
[2026-05-25 11:34:00] [INFO ] Added : 10 causal constraints over 4 iterations in 252 ms. Result :sat
Minimization took 247 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:00] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:00] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:34:01] [INFO ] [Real]Added 96 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:34:01] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:01] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:01] [INFO ] [Nat]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:34:01] [INFO ] [Nat]Added 96 Read/Feed constraints in 19 ms returned sat
[2026-05-25 11:34:01] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:34:01] [INFO ] Added : 1 causal constraints over 1 iterations in 151 ms. Result :sat
Minimization took 238 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:01] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:34:01] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:34:01] [INFO ] [Real]Added 96 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:34:02] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:02] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:34:02] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:34:02] [INFO ] [Nat]Added 96 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:34:02] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 73 ms.
[2026-05-25 11:34:02] [INFO ] Added : 1 causal constraints over 1 iterations in 161 ms. Result :sat
Minimization took 238 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:02] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:02] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:34:02] [INFO ] [Real]Added 96 Read/Feed constraints in 62 ms returned sat
[2026-05-25 11:34:03] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:03] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:03] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:34:03] [INFO ] [Nat]Added 96 Read/Feed constraints in 47 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:34:03] [INFO ] Deduced a trap composed of 77 places in 259 ms of which 46 ms to minimize.
[2026-05-25 11:34:03] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 322 ms
[2026-05-25 11:34:03] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:34:03] [INFO ] Added : 12 causal constraints over 4 iterations in 278 ms. Result :sat
Minimization took 254 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:04] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:04] [INFO ] [Real]Absence check using state equation in 162 ms returned sat
[2026-05-25 11:34:04] [INFO ] [Real]Added 96 Read/Feed constraints in 35 ms returned sat
[2026-05-25 11:34:04] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:04] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:04] [INFO ] [Nat]Absence check using state equation in 163 ms returned sat
[2026-05-25 11:34:04] [INFO ] [Nat]Added 96 Read/Feed constraints in 33 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:34:04] [INFO ] Deduced a trap composed of 77 places in 256 ms of which 44 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:34:05] [INFO ] Deduced a trap composed of 77 places in 254 ms of which 44 ms to minimize.
[2026-05-25 11:34:05] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 616 ms
[2026-05-25 11:34:05] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 92 ms.
[2026-05-25 11:34:05] [INFO ] Added : 6 causal constraints over 3 iterations in 276 ms. Result :sat
Minimization took 269 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:05] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:06] [INFO ] [Real]Absence check using state equation in 151 ms returned sat
[2026-05-25 11:34:06] [INFO ] [Real]Added 96 Read/Feed constraints in 38 ms returned sat
[2026-05-25 11:34:06] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:06] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:34:06] [INFO ] [Nat]Absence check using state equation in 147 ms returned sat
[2026-05-25 11:34:06] [INFO ] [Nat]Added 96 Read/Feed constraints in 28 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:34:06] [INFO ] Deduced a trap composed of 77 places in 259 ms of which 44 ms to minimize.
[2026-05-25 11:34:06] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 340 ms
[2026-05-25 11:34:06] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 75 ms.
[2026-05-25 11:34:07] [INFO ] Added : 5 causal constraints over 3 iterations in 248 ms. Result :sat
Minimization took 350 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:07] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:07] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:34:07] [INFO ] [Real]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:34:07] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:07] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:07] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:34:07] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:34:08] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 79 ms.
[2026-05-25 11:34:08] [INFO ] Added : 3 causal constraints over 1 iterations in 174 ms. Result :sat
Minimization took 252 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:08] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:08] [INFO ] [Real]Absence check using state equation in 152 ms returned sat
[2026-05-25 11:34:08] [INFO ] [Real]Added 96 Read/Feed constraints in 39 ms returned sat
[2026-05-25 11:34:08] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:08] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:34:08] [INFO ] [Nat]Absence check using state equation in 150 ms returned sat
[2026-05-25 11:34:08] [INFO ] [Nat]Added 96 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:34:09] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 78 ms.
[2026-05-25 11:34:09] [INFO ] Added : 3 causal constraints over 1 iterations in 186 ms. Result :sat
Minimization took 247 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:09] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:09] [INFO ] [Real]Absence check using state equation in 155 ms returned sat
[2026-05-25 11:34:09] [INFO ] [Real]Added 96 Read/Feed constraints in 36 ms returned sat
[2026-05-25 11:34:09] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:09] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:09] [INFO ] [Nat]Absence check using state equation in 143 ms returned sat
[2026-05-25 11:34:10] [INFO ] [Nat]Added 96 Read/Feed constraints in 30 ms returned sat
[2026-05-25 11:34:10] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 90 ms.
[2026-05-25 11:34:10] [INFO ] Added : 1 causal constraints over 1 iterations in 167 ms. Result :sat
Minimization took 247 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:10] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:34:10] [INFO ] [Real]Absence check using state equation in 135 ms returned sat
[2026-05-25 11:34:10] [INFO ] [Real]Added 96 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:34:10] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:10] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:34:10] [INFO ] [Nat]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:34:10] [INFO ] [Nat]Added 96 Read/Feed constraints in 21 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:34:11] [INFO ] Deduced a trap composed of 77 places in 254 ms of which 37 ms to minimize.
[2026-05-25 11:34:11] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 309 ms
[2026-05-25 11:34:11] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 79 ms.
[2026-05-25 11:34:11] [INFO ] Added : 1 causal constraints over 1 iterations in 156 ms. Result :sat
Minimization took 234 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:11] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:34:11] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:34:11] [INFO ] [Real]Added 96 Read/Feed constraints in 29 ms returned sat
[2026-05-25 11:34:11] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:34:12] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:34:12] [INFO ] [Nat]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:34:12] [INFO ] [Nat]Added 96 Read/Feed constraints in 27 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:34:12] [INFO ] Deduced a trap composed of 77 places in 261 ms of which 45 ms to minimize.
[2026-05-25 11:34:12] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 325 ms
[2026-05-25 11:34:12] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 80 ms.
[2026-05-25 11:34:12] [INFO ] Added : 5 causal constraints over 3 iterations in 347 ms. Result :sat
Minimization took 313 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 56 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 56 ms. Remains : 463/463 places, 1315/1315 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 63 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
[2026-05-25 11:34:25] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:34:25] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:34:25] [INFO ] Implicit Places using invariants in 319 ms returned []
[2026-05-25 11:34:25] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:34:25] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:34:25] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:34:26] [INFO ] Implicit Places using invariants and state equation in 1564 ms returned []
Implicit Place search using SMT with State Equation took 1884 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:34:26] [INFO ] Redundant transitions in 29 ms returned []
Running 1313 sub problems to find dead transitions.
[2026-05-25 11:34:26] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:34:26] [INFO ] Invariant cache hit.
[2026-05-25 11:34:26] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:34:40] [INFO ] Deduced a trap composed of 131 places in 119 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 463/1224 variables, and 4 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30022 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/463 constraints, ReadFeed: 0/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/463 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 3 (OVERLAPS) 761/1224 variables, 463/467 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1224 variables, 96/563 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 1876 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30930 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62862ms problems are : Problem set: 0 solved, 1313 unsolved
Search for dead transitions found 0 dead transitions in 62864ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64847 ms. Remains : 463/463 places, 1315/1315 transitions.
[2026-05-25 11:35:29] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {230=1, 359=1, 562=1, 749=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 381=1, 584=1, 746=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 75 ms. (steps per millisecond=133 ) properties (out of 12) seen :[1, 2, 6, 0, 3, 3, 0, 1, 2, 0, 0, 3]
Current structural bounds on expressions (after cover walk) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
RANDOM walk for 40002 steps (8 resets) in 1298 ms. (30 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 173 ms. (229 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 180 ms. (221 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 135 ms. (294 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 107 ms. (370 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 100 ms. (396 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 100 ms. (396 steps per ms) remains 12/12 properties
[2026-05-25 11:35:30] [INFO ] Flatten gal took : 298 ms
BEST_FIRST walk for 40004 steps (8 resets) in 120 ms. (330 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 122 ms. (325 steps per ms) remains 12/12 properties
[2026-05-25 11:35:30] [INFO ] Flatten gal took : 91 ms
BEST_FIRST walk for 40004 steps (8 resets) in 118 ms. (336 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 103 ms. (384 steps per ms) remains 12/12 properties
[2026-05-25 11:35:30] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality1874782523890296107.gal : 52 ms
[2026-05-25 11:35:30] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality6592559298334364918.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality1874782523890296107.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality6592559298334364918.prop' '--nowitness' '--gen-order' 'FOLLOW'
BEST_FIRST walk for 40003 steps (8 resets) in 116 ms. (341 steps per ms) remains 12/12 properties
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...328
BEST_FIRST walk for 40004 steps (8 resets) in 116 ms. (341 steps per ms) remains 12/12 properties
Loading property file /tmp/ReachabilityCardinality6592559298334364918.prop.
SDD proceeding with computation,12 properties remain. new max is 4
SDD size :1 after 31
SDD proceeding with computation,12 properties remain. new max is 8
SDD size :31 after 1991
SDD proceeding with computation,12 properties remain. new max is 16
SDD size :1991 after 1.23611e+06
Interrupted probabilistic random walk after 166253 steps, run timeout after 3001 ms. (steps per millisecond=55 ) properties seen :0 out of 12
Probabilistic random walk after 166253 steps, saw 102330 distinct states, run finished after 3006 ms. (steps per millisecond=55 ) properties seen :0
[2026-05-25 11:35:34] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:35:34] [INFO ] Invariant cache hit.
[2026-05-25 11:35:34] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/12 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 1 (OVERLAPS) 26/38 variables, 12/12 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/38 variables, 0/12 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 3 (OVERLAPS) 416/454 variables, 23/35 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/454 variables, 1/36 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/454 variables, 0/36 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 6 (OVERLAPS) 16/470 variables, 2/38 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/470 variables, 2/40 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/470 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 9 (OVERLAPS) 626/1096 variables, 358/398 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/1096 variables, 95/493 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/1096 variables, 0/493 constraints. Problems are: Problem set: 0 solved, 12 unsolved
All remaining problems are real, not stopping.
At refinement iteration 12 (OVERLAPS) 62/1158 variables, 1/494 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/1158 variables, 0/494 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 14 (OVERLAPS) 66/1224 variables, 68/562 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/1224 variables, 0/562 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 16 (OVERLAPS) 0/1224 variables, 0/562 constraints. Problems are: Problem set: 0 solved, 12 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1224/1224 variables, and 562 constraints, problems are : Problem set: 0 solved, 12 unsolved in 1812 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 12/12 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 12 unsolved
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/12 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 1 (OVERLAPS) 26/38 variables, 12/12 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/38 variables, 0/12 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 3 (OVERLAPS) 416/454 variables, 23/35 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/454 variables, 1/36 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/454 variables, 11/47 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/454 variables, 0/47 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 7 (OVERLAPS) 16/470 variables, 2/49 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/470 variables, 2/51 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/470 variables, 0/51 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 10 (OVERLAPS) 626/1096 variables, 358/409 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/1096 variables, 95/504 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/1096 variables, 1/505 constraints. Problems are: Problem set: 0 solved, 12 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:35:36] [INFO ] Deduced a trap along path composed of 3 places in 29 ms of which 2 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:35:36] [INFO ] Deduced a trap along path composed of 3 places in 15 ms of which 1 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:35:36] [INFO ] Deduced a trap along path composed of 3 places in 31 ms of which 5 ms to minimize.
At refinement iteration 13 (INCLUDED_ONLY) 0/1096 variables, 3/508 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/1096 variables, 0/508 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 15 (OVERLAPS) 62/1158 variables, 1/509 constraints. Problems are: Problem set: 0 solved, 12 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:35:37] [INFO ] Deduced a trap composed of 131 places in 194 ms of which 6 ms to minimize.
At refinement iteration 16 (INCLUDED_ONLY) 0/1158 variables, 1/510 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1158 variables, 0/510 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 18 (OVERLAPS) 66/1224 variables, 68/578 constraints. Problems are: Problem set: 0 solved, 12 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:35:38] [INFO ] Deduced a trap along path composed of 3 places in 29 ms of which 1 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:35:38] [INFO ] Deduced a trap along path composed of 3 places in 17 ms of which 0 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:35:38] [INFO ] Deduced a trap along path composed of 3 places in 15 ms of which 1 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:35:38] [INFO ] Deduced a trap along path composed of 3 places in 15 ms of which 0 ms to minimize.
SDD proceeding with computation,12 properties remain. new max is 32
SDD size :1.23611e+06 after 3.67438e+10
At refinement iteration 19 (INCLUDED_ONLY) 0/1224 variables, 4/582 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/1224 variables, 0/582 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 21 (OVERLAPS) 0/1224 variables, 0/582 constraints. Problems are: Problem set: 0 solved, 12 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 582 constraints, problems are : Problem set: 0 solved, 12 unsolved in 4458 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 12/12 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 7/7 constraints]
After SMT, in 6285ms problems are : Problem set: 0 solved, 12 unsolved
Fused 12 Parikh solutions to 8 different solutions.
SDD proceeding with computation,12 properties remain. new max is 64
SDD size :3.67438e+10 after 5.52917e+17
Parikh walk visited 0 properties in 30001 ms.
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 64 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65 ms. Remains : 463/463 places, 1315/1315 transitions.
RANDOM walk for 40003 steps (8 resets) in 434 ms. (91 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40003 steps (8 resets) in 111 ms. (357 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 87 ms. (454 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 136 ms. (292 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 103 ms. (384 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40003 steps (8 resets) in 133 ms. (298 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 104 ms. (380 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 94 ms. (421 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 86 ms. (459 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40003 steps (8 resets) in 76 ms. (519 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40002 steps (8 resets) in 105 ms. (377 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 79 ms. (500 steps per ms) remains 12/12 properties
BEST_FIRST walk for 40004 steps (8 resets) in 107 ms. (370 steps per ms) remains 12/12 properties
Interrupted probabilistic random walk after 191428 steps, run timeout after 3001 ms. (steps per millisecond=63 ) properties seen :0 out of 12
Probabilistic random walk after 191428 steps, saw 117907 distinct states, run finished after 3001 ms. (steps per millisecond=63 ) properties seen :0
[2026-05-25 11:36:13] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:36:13] [INFO ] Invariant cache hit.
[2026-05-25 11:36:13] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/12 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 1 (OVERLAPS) 26/38 variables, 12/12 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/38 variables, 0/12 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 3 (OVERLAPS) 416/454 variables, 23/35 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/454 variables, 1/36 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/454 variables, 0/36 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 6 (OVERLAPS) 16/470 variables, 2/38 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/470 variables, 2/40 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/470 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 9 (OVERLAPS) 626/1096 variables, 358/398 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/1096 variables, 95/493 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/1096 variables, 0/493 constraints. Problems are: Problem set: 0 solved, 12 unsolved
All remaining problems are real, not stopping.
At refinement iteration 12 (OVERLAPS) 62/1158 variables, 1/494 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/1158 variables, 0/494 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 14 (OVERLAPS) 66/1224 variables, 68/562 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/1224 variables, 0/562 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 16 (OVERLAPS) 0/1224 variables, 0/562 constraints. Problems are: Problem set: 0 solved, 12 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1224/1224 variables, and 562 constraints, problems are : Problem set: 0 solved, 12 unsolved in 1646 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 12/12 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 12 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/12 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 1 (OVERLAPS) 26/38 variables, 12/12 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/38 variables, 0/12 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 3 (OVERLAPS) 416/454 variables, 23/35 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/454 variables, 1/36 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/454 variables, 11/47 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/454 variables, 0/47 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 7 (OVERLAPS) 16/470 variables, 2/49 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/470 variables, 2/51 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/470 variables, 0/51 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 10 (OVERLAPS) 626/1096 variables, 358/409 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/1096 variables, 95/504 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/1096 variables, 1/505 constraints. Problems are: Problem set: 0 solved, 12 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:36:16] [INFO ] Deduced a trap along path composed of 3 places in 32 ms of which 5 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:36:16] [INFO ] Deduced a trap along path composed of 3 places in 21 ms of which 1 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:36:16] [INFO ] Deduced a trap along path composed of 3 places in 24 ms of which 0 ms to minimize.
At refinement iteration 13 (INCLUDED_ONLY) 0/1096 variables, 3/508 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/1096 variables, 0/508 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 15 (OVERLAPS) 62/1158 variables, 1/509 constraints. Problems are: Problem set: 0 solved, 12 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:36:17] [INFO ] Deduced a trap composed of 131 places in 175 ms of which 7 ms to minimize.
At refinement iteration 16 (INCLUDED_ONLY) 0/1158 variables, 1/510 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1158 variables, 0/510 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 18 (OVERLAPS) 66/1224 variables, 68/578 constraints. Problems are: Problem set: 0 solved, 12 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:36:18] [INFO ] Deduced a trap along path composed of 3 places in 27 ms of which 0 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:36:18] [INFO ] Deduced a trap along path composed of 3 places in 23 ms of which 1 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:36:18] [INFO ] Deduced a trap along path composed of 3 places in 21 ms of which 0 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:36:18] [INFO ] Deduced a trap along path composed of 3 places in 21 ms of which 1 ms to minimize.
At refinement iteration 19 (INCLUDED_ONLY) 0/1224 variables, 4/582 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/1224 variables, 0/582 constraints. Problems are: Problem set: 0 solved, 12 unsolved
At refinement iteration 21 (OVERLAPS) 0/1224 variables, 0/582 constraints. Problems are: Problem set: 0 solved, 12 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 582 constraints, problems are : Problem set: 0 solved, 12 unsolved in 4385 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 12/12 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 7/7 constraints]
After SMT, in 6043ms problems are : Problem set: 0 solved, 12 unsolved
Fused 12 Parikh solutions to 8 different solutions.
Detected timeout of ITS tools.
[2026-05-25 11:36:21] [INFO ] Flatten gal took : 84 ms
[2026-05-25 11:36:21] [INFO ] Applying decomposition
[2026-05-25 11:36:21] [INFO ] Flatten gal took : 62 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph1352319212356098730.txt' '-o' '/tmp/graph1352319212356098730.bin' '-w' '/tmp/graph1352319212356098730.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph1352319212356098730.bin' '-l' '-1' '-v' '-w' '/tmp/graph1352319212356098730.weights' '-q' '0' '-e' '0.001'
[2026-05-25 11:36:21] [INFO ] Decomposing Gal with order
[2026-05-25 11:36:21] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 11:36:21] [INFO ] Removed a total of 2256 redundant transitions.
[2026-05-25 11:36:21] [INFO ] Flatten gal took : 143 ms
[2026-05-25 11:36:21] [INFO ] Fuse similar labels procedure discarded/fused a total of 968 labels/synchronizations in 78 ms.
[2026-05-25 11:36:21] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality7000312112057398638.gal : 13 ms
[2026-05-25 11:36:21] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality16917236173252504447.prop : 1 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality7000312112057398638.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality16917236173252504447.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...308
Loading property file /tmp/ReachabilityCardinality16917236173252504447.prop.
Parikh walk visited 0 properties in 30001 ms.
Support contains 12 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 53 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 53 ms. Remains : 463/463 places, 1315/1315 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Applied a total of 0 rules in 51 ms. Remains 463 /463 variables (removed 0) and now considering 1315/1315 (removed 0) transitions.
[2026-05-25 11:36:50] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:36:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:36:50] [INFO ] Implicit Places using invariants in 404 ms returned []
[2026-05-25 11:36:50] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:36:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:36:50] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:36:52] [INFO ] Implicit Places using invariants and state equation in 1592 ms returned []
Implicit Place search using SMT with State Equation took 1999 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:36:52] [INFO ] Redundant transitions in 104 ms returned []
Running 1313 sub problems to find dead transitions.
[2026-05-25 11:36:52] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:36:52] [INFO ] Invariant cache hit.
[2026-05-25 11:36:52] [INFO ] State equation strengthened by 96 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:37:05] [INFO ] Deduced a trap composed of 131 places in 98 ms of which 4 ms to minimize.
Detected timeout of ITS tools.
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 463/1224 variables, and 4 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30023 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/463 constraints, ReadFeed: 0/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1313 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/463 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/463 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/463 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 3 (OVERLAPS) 761/1224 variables, 463/467 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1224 variables, 96/563 constraints. Problems are: Problem set: 0 solved, 1313 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1224/1224 variables, and 1876 constraints, problems are : Problem set: 0 solved, 1313 unsolved in 30979 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 463/463 constraints, ReadFeed: 96/96 constraints, PredecessorRefiner: 1313/1313 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 63183ms problems are : Problem set: 0 solved, 1313 unsolved
Search for dead transitions found 0 dead transitions in 63188ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65354 ms. Remains : 463/463 places, 1315/1315 transitions.
Current structural bounds on expressions (After reachability solving 0 queries.) : Max Seen:[34, 100, 1179, 194, 506, 338, 286, 79, 503, 266, 672, 345] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Starting property specific reduction for FunctionPointer-PT-c032-UpperBounds-00
Current structural bounds on expressions (Initially) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Adding known information on max bounds.) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Before main loop) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:37:55] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:37:55] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[0] Max Struct:[+inf]
RANDOM walk for 10000 steps (2 resets) in 27 ms. (357 steps per ms)
BEST_FIRST walk for 10001 steps (2 resets) in 8 ms. (1111 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:37:55] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:37:55] [INFO ] Invariant cache hit.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:37:55] [INFO ] [Real]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:37:55] [INFO ] [Real]Absence check using state equation in 165 ms returned sat
[2026-05-25 11:37:55] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:37:55] [INFO ] [Real]Added 96 Read/Feed constraints in 25 ms returned sat
[2026-05-25 11:37:55] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:37:55] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:37:55] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:37:56] [INFO ] [Nat]Added 96 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:37:56] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 173 ms.
[2026-05-25 11:37:56] [INFO ] Added : 2 causal constraints over 1 iterations in 265 ms. Result :sat
Minimization took 285 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[25] Max Struct:[+inf]
Support contains 1 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Discarding 10 places :
Symmetric choice reduction at 0 with 10 rule applications. Total rules 10 place count 453 transition count 1291
Iterating global reduction 0 with 10 rules applied. Total rules applied 20 place count 453 transition count 1291
Ensure Unique test removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
Iterating post reduction 0 with 6 rules applied. Total rules applied 26 place count 453 transition count 1285
Discarding 7 places :
Symmetric choice reduction at 1 with 7 rule applications. Total rules 33 place count 446 transition count 1269
Iterating global reduction 1 with 7 rules applied. Total rules applied 40 place count 446 transition count 1269
Discarding 5 places :
Symmetric choice reduction at 1 with 5 rule applications. Total rules 45 place count 441 transition count 1255
Iterating global reduction 1 with 5 rules applied. Total rules applied 50 place count 441 transition count 1255
Discarding 5 places :
Symmetric choice reduction at 1 with 5 rule applications. Total rules 55 place count 436 transition count 1245
Iterating global reduction 1 with 5 rules applied. Total rules applied 60 place count 436 transition count 1245
Discarding 5 places :
Symmetric choice reduction at 1 with 5 rule applications. Total rules 65 place count 431 transition count 1235
Iterating global reduction 1 with 5 rules applied. Total rules applied 70 place count 431 transition count 1235
Discarding 5 places :
Symmetric choice reduction at 1 with 5 rule applications. Total rules 75 place count 426 transition count 1225
Iterating global reduction 1 with 5 rules applied. Total rules applied 80 place count 426 transition count 1225
Discarding 5 places :
Symmetric choice reduction at 1 with 5 rule applications. Total rules 85 place count 421 transition count 1215
Iterating global reduction 1 with 5 rules applied. Total rules applied 90 place count 421 transition count 1215
Discarding 3 places :
Symmetric choice reduction at 1 with 3 rule applications. Total rules 93 place count 418 transition count 1209
Iterating global reduction 1 with 3 rules applied. Total rules applied 96 place count 418 transition count 1209
Discarding 2 places :
Symmetric choice reduction at 1 with 2 rule applications. Total rules 98 place count 416 transition count 1205
Iterating global reduction 1 with 2 rules applied. Total rules applied 100 place count 416 transition count 1205
Applied a total of 100 rules in 131 ms. Remains 416 /463 variables (removed 47) and now considering 1205/1315 (removed 110) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 131 ms. Remains : 416/463 places, 1205/1315 transitions.
[2026-05-25 11:37:56] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {219=1, 303=1, 501=1, 675=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {256=1, 340=1, 666=1, 678=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 69 ms. (steps per millisecond=144 ) properties (out of 1) seen :[0]
Current structural bounds on expressions (after cover walk) : Max Seen:[25] Max Struct:[+inf]
[2026-05-25 11:37:57] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
// Phase 1: matrix 680 rows 416 cols
[2026-05-25 11:37:57] [INFO ] Computed 3 invariants in 23 ms
Current structural bounds on expressions (after invariants) : Max Seen:[25] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2578 ms. (387 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 951 ms. (1050 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[25] Max Struct:[+inf]
[2026-05-25 11:38:00] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:38:00] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:38:00] [INFO ] [Real]Absence check using 3 positive place invariants in 3 ms returned sat
[2026-05-25 11:38:00] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:38:00] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:38:00] [INFO ] [Real]Added 75 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:38:00] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:38:01] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:38:01] [INFO ] [Nat]Absence check using state equation in 127 ms returned sat
[2026-05-25 11:38:01] [INFO ] [Nat]Added 75 Read/Feed constraints in 37 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:38:01] [INFO ] Deduced a trap composed of 69 places in 213 ms of which 24 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:38:01] [INFO ] Deduced a trap composed of 69 places in 200 ms of which 23 ms to minimize.
[2026-05-25 11:38:01] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 486 ms
[2026-05-25 11:38:01] [INFO ] Computed and/alt/rep : 333/1252/331 causal constraints (skipped 347 transitions) in 63 ms.
[2026-05-25 11:38:01] [INFO ] Added : 5 causal constraints over 2 iterations in 194 ms. Result :sat
Minimization took 252 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[25] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[32] Max Struct:[+inf]
Support contains 1 out of 416 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 416/416 places, 1205/1205 transitions.
Applied a total of 0 rules in 44 ms. Remains 416 /416 variables (removed 0) and now considering 1205/1205 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 45 ms. Remains : 416/416 places, 1205/1205 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 416/416 places, 1205/1205 transitions.
Applied a total of 0 rules in 44 ms. Remains 416 /416 variables (removed 0) and now considering 1205/1205 (removed 0) transitions.
[2026-05-25 11:38:02] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:38:02] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:38:02] [INFO ] Implicit Places using invariants in 284 ms returned []
[2026-05-25 11:38:02] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:38:02] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:38:02] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:38:04] [INFO ] Implicit Places using invariants and state equation in 2244 ms returned []
Implicit Place search using SMT with State Equation took 2531 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:38:04] [INFO ] Redundant transitions in 25 ms returned []
Running 1203 sub problems to find dead transitions.
[2026-05-25 11:38:04] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:38:04] [INFO ] Invariant cache hit.
[2026-05-25 11:38:04] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/416 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:38:15] [INFO ] Deduced a trap composed of 131 places in 140 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/416 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 416/1096 variables, and 4 constraints, problems are : Problem set: 0 solved, 1203 unsolved in 30022 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/416 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1203/1203 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1203 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/416 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/416 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/416 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 3 (OVERLAPS) 680/1096 variables, 416/420 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1096 variables, 75/495 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1096/1096 variables, and 1698 constraints, problems are : Problem set: 0 solved, 1203 unsolved in 30790 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 416/416 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1203/1203 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62377ms problems are : Problem set: 0 solved, 1203 unsolved
Search for dead transitions found 0 dead transitions in 62380ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64991 ms. Remains : 416/416 places, 1205/1205 transitions.
[2026-05-25 11:39:07] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {219=1, 303=1, 501=1, 675=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {256=1, 340=1, 666=1, 678=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 68 ms. (steps per millisecond=147 ) properties (out of 1) seen :[3]
Current structural bounds on expressions (after cover walk) : Max Seen:[32] Max Struct:[+inf]
[2026-05-25 11:39:07] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:39:07] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[32] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2568 ms. (389 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 1132 ms. (882 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[32] Max Struct:[+inf]
[2026-05-25 11:39:11] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:39:11] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:39:11] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:39:11] [INFO ] [Real]Absence check using state equation in 129 ms returned sat
[2026-05-25 11:39:11] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:39:11] [INFO ] [Real]Added 75 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:39:11] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:39:11] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:39:11] [INFO ] [Nat]Absence check using state equation in 122 ms returned sat
[2026-05-25 11:39:11] [INFO ] [Nat]Added 75 Read/Feed constraints in 38 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:39:11] [INFO ] Deduced a trap composed of 69 places in 230 ms of which 34 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:39:12] [INFO ] Deduced a trap composed of 69 places in 203 ms of which 26 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:39:12] [INFO ] Deduced a trap composed of 131 places in 170 ms of which 7 ms to minimize.
[2026-05-25 11:39:12] [INFO ] Trap strengthening (SAT) tested/added 4/3 trap constraints in 692 ms
[2026-05-25 11:39:12] [INFO ] Computed and/alt/rep : 333/1252/331 causal constraints (skipped 347 transitions) in 82 ms.
[2026-05-25 11:39:12] [INFO ] Added : 6 causal constraints over 2 iterations in 192 ms. Result :sat
Minimization took 236 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[32] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[32] Max Struct:[+inf]
Support contains 1 out of 416 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 416/416 places, 1205/1205 transitions.
Applied a total of 0 rules in 62 ms. Remains 416 /416 variables (removed 0) and now considering 1205/1205 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 62 ms. Remains : 416/416 places, 1205/1205 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 416/416 places, 1205/1205 transitions.
Applied a total of 0 rules in 62 ms. Remains 416 /416 variables (removed 0) and now considering 1205/1205 (removed 0) transitions.
[2026-05-25 11:39:13] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:39:13] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:39:13] [INFO ] Implicit Places using invariants in 284 ms returned []
[2026-05-25 11:39:13] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:39:13] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:39:13] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:39:15] [INFO ] Implicit Places using invariants and state equation in 2233 ms returned []
Implicit Place search using SMT with State Equation took 2518 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:39:15] [INFO ] Redundant transitions in 19 ms returned []
Running 1203 sub problems to find dead transitions.
[2026-05-25 11:39:15] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:39:15] [INFO ] Invariant cache hit.
[2026-05-25 11:39:15] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/416 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:39:26] [INFO ] Deduced a trap composed of 131 places in 120 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/416 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 416/1096 variables, and 4 constraints, problems are : Problem set: 0 solved, 1203 unsolved in 30032 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/416 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1203/1203 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1203 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/416 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/416 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/416 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 3 (OVERLAPS) 680/1096 variables, 416/420 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1096 variables, 75/495 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1096/1096 variables, and 1698 constraints, problems are : Problem set: 0 solved, 1203 unsolved in 30764 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 416/416 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1203/1203 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62499ms problems are : Problem set: 0 solved, 1203 unsolved
Search for dead transitions found 0 dead transitions in 62504ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65119 ms. Remains : 416/416 places, 1205/1205 transitions.
[2026-05-25 11:40:18] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {219=1, 303=1, 501=1, 675=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {256=1, 340=1, 666=1, 678=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 69 ms. (steps per millisecond=144 ) properties (out of 1) seen :[1]
Current structural bounds on expressions (after cover walk) : Max Seen:[32] Max Struct:[+inf]
[2026-05-25 11:40:18] [INFO ] Flatten gal took : 35 ms
RANDOM walk for 40009 steps (8 resets) in 251 ms. (158 steps per ms) remains 1/1 properties
[2026-05-25 11:40:18] [INFO ] Flatten gal took : 35 ms
BEST_FIRST walk for 40004 steps (8 resets) in 73 ms. (540 steps per ms) remains 1/1 properties
[2026-05-25 11:40:18] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality8977173955579652554.gal : 13 ms
[2026-05-25 11:40:18] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality4368107536106440881.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality8977173955579652554.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality4368107536106440881.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...328
Loading property file /tmp/ReachabilityCardinality4368107536106440881.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 31
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :31 after 1995
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :1995 after 1.24464e+06
Interrupted probabilistic random walk after 541076 steps, run timeout after 3001 ms. (steps per millisecond=180 ) properties seen :0 out of 1
Probabilistic random walk after 541076 steps, saw 331776 distinct states, run finished after 3001 ms. (steps per millisecond=180 ) properties seen :0
[2026-05-25 11:40:21] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:40:21] [INFO ] Invariant cache hit.
[2026-05-25 11:40:21] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 5/8 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/8 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 340/348 variables, 4/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/348 variables, 1/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/348 variables, 0/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 6/354 variables, 2/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/354 variables, 2/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/354 variables, 0/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 598/952 variables, 333/345 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 12 (INCLUDED_ONLY) 0/952 variables, 74/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/952 variables, 0/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 62/1014 variables, 1/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/1014 variables, 0/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 68/1082 variables, 66/486 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1082 variables, 0/486 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 8/1090 variables, 4/490 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/1090 variables, 0/490 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 6/1096 variables, 4/494 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (INCLUDED_ONLY) 0/1096 variables, 0/494 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (OVERLAPS) 0/1096 variables, 0/494 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1096/1096 variables, and 494 constraints, problems are : Problem set: 0 solved, 1 unsolved in 317 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 416/416 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 5/8 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/8 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 340/348 variables, 4/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/348 variables, 1/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/348 variables, 1/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/348 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 6/354 variables, 2/11 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/354 variables, 2/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/354 variables, 0/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 598/952 variables, 333/346 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/952 variables, 74/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/952 variables, 0/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 62/1014 variables, 1/421 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/1014 variables, 0/421 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 68/1082 variables, 66/487 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/1082 variables, 0/487 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 8/1090 variables, 4/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/1090 variables, 0/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 6/1096 variables, 4/495 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (INCLUDED_ONLY) 0/1096 variables, 0/495 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 23 (OVERLAPS) 0/1096 variables, 0/495 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1096/1096 variables, and 495 constraints, problems are : Problem set: 0 solved, 1 unsolved in 445 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 416/416 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 773ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 162 ms.
Support contains 1 out of 416 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 416/416 places, 1205/1205 transitions.
Applied a total of 0 rules in 44 ms. Remains 416 /416 variables (removed 0) and now considering 1205/1205 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 44 ms. Remains : 416/416 places, 1205/1205 transitions.
RANDOM walk for 40004 steps (8 resets) in 180 ms. (221 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (8 resets) in 43 ms. (909 steps per ms) remains 1/1 properties
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :1.24464e+06 after 3.74714e+10
Interrupted probabilistic random walk after 547619 steps, run timeout after 3001 ms. (steps per millisecond=182 ) properties seen :0 out of 1
Probabilistic random walk after 547619 steps, saw 335788 distinct states, run finished after 3001 ms. (steps per millisecond=182 ) properties seen :0
[2026-05-25 11:40:25] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:40:25] [INFO ] Invariant cache hit.
[2026-05-25 11:40:25] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 5/8 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/8 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 340/348 variables, 4/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/348 variables, 1/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/348 variables, 0/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 6/354 variables, 2/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/354 variables, 2/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/354 variables, 0/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 598/952 variables, 333/345 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 12 (INCLUDED_ONLY) 0/952 variables, 74/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/952 variables, 0/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 62/1014 variables, 1/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/1014 variables, 0/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 68/1082 variables, 66/486 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1082 variables, 0/486 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 8/1090 variables, 4/490 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/1090 variables, 0/490 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 6/1096 variables, 4/494 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (INCLUDED_ONLY) 0/1096 variables, 0/494 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (OVERLAPS) 0/1096 variables, 0/494 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1096/1096 variables, and 494 constraints, problems are : Problem set: 0 solved, 1 unsolved in 309 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 416/416 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 5/8 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/8 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 340/348 variables, 4/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/348 variables, 1/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/348 variables, 1/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/348 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 6/354 variables, 2/11 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/354 variables, 2/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/354 variables, 0/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 598/952 variables, 333/346 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/952 variables, 74/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/952 variables, 0/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 62/1014 variables, 1/421 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/1014 variables, 0/421 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 68/1082 variables, 66/487 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/1082 variables, 0/487 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 8/1090 variables, 4/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/1090 variables, 0/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 6/1096 variables, 4/495 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (INCLUDED_ONLY) 0/1096 variables, 0/495 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 23 (OVERLAPS) 0/1096 variables, 0/495 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1096/1096 variables, and 495 constraints, problems are : Problem set: 0 solved, 1 unsolved in 414 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 416/416 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 744ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 161 ms.
Support contains 1 out of 416 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 416/416 places, 1205/1205 transitions.
Applied a total of 0 rules in 43 ms. Remains 416 /416 variables (removed 0) and now considering 1205/1205 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 43 ms. Remains : 416/416 places, 1205/1205 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 416/416 places, 1205/1205 transitions.
Applied a total of 0 rules in 46 ms. Remains 416 /416 variables (removed 0) and now considering 1205/1205 (removed 0) transitions.
[2026-05-25 11:40:26] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:40:26] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:40:26] [INFO ] Implicit Places using invariants in 289 ms returned []
[2026-05-25 11:40:26] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:40:26] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:40:27] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:40:29] [INFO ] Implicit Places using invariants and state equation in 2235 ms returned []
Implicit Place search using SMT with State Equation took 2529 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:40:29] [INFO ] Redundant transitions in 23 ms returned []
Running 1203 sub problems to find dead transitions.
[2026-05-25 11:40:29] [INFO ] Flow matrix only has 680 transitions (discarded 525 similar events)
[2026-05-25 11:40:29] [INFO ] Invariant cache hit.
[2026-05-25 11:40:29] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/416 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:40:40] [INFO ] Deduced a trap composed of 131 places in 120 ms of which 4 ms to minimize.
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :3.74714e+10 after 5.80647e+17
At refinement iteration 1 (INCLUDED_ONLY) 0/416 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Error getting values : (error "ParserException while parsing response: (timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 416/1096 variables, and 4 constraints, problems are : Problem set: 0 solved, 1203 unsolved in 30024 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/416 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1203/1203 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1203 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/416 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/416 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Detected timeout of ITS tools.
[2026-05-25 11:41:08] [INFO ] Flatten gal took : 36 ms
[2026-05-25 11:41:08] [INFO ] Applying decomposition
[2026-05-25 11:41:08] [INFO ] Flatten gal took : 30 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph17596801062212450817.txt' '-o' '/tmp/graph17596801062212450817.bin' '-w' '/tmp/graph17596801062212450817.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph17596801062212450817.bin' '-l' '-1' '-v' '-w' '/tmp/graph17596801062212450817.weights' '-q' '0' '-e' '0.001'
[2026-05-25 11:41:08] [INFO ] Decomposing Gal with order
[2026-05-25 11:41:08] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 11:41:08] [INFO ] Removed a total of 2058 redundant transitions.
[2026-05-25 11:41:08] [INFO ] Flatten gal took : 79 ms
[2026-05-25 11:41:08] [INFO ] Fuse similar labels procedure discarded/fused a total of 919 labels/synchronizations in 46 ms.
[2026-05-25 11:41:09] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality6791724237341289577.gal : 13 ms
[2026-05-25 11:41:09] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality11127584851292598379.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality6791724237341289577.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality11127584851292598379.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...308
Loading property file /tmp/ReachabilityCardinality11127584851292598379.prop.
At refinement iteration 2 (INCLUDED_ONLY) 0/416 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 3 (OVERLAPS) 680/1096 variables, 416/420 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1096 variables, 75/495 constraints. Problems are: Problem set: 0 solved, 1203 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1096/1096 variables, and 1698 constraints, problems are : Problem set: 0 solved, 1203 unsolved in 30878 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 416/416 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1203/1203 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62768ms problems are : Problem set: 0 solved, 1203 unsolved
Search for dead transitions found 0 dead transitions in 62770ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65375 ms. Remains : 416/416 places, 1205/1205 transitions.
Attempting over-approximation, by ignoring read arcs.
Ensure Unique test removed 525 transitions
Reduce isomorphic transitions removed 525 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 11 transitions
Trivial Post-agglo rules discarded 11 transitions
Performed 11 trivial Post agglomeration. Transition count delta: 11
Iterating post reduction 0 with 536 rules applied. Total rules applied 536 place count 416 transition count 669
Reduce places removed 11 places and 0 transitions.
Iterating post reduction 1 with 11 rules applied. Total rules applied 547 place count 405 transition count 669
Performed 69 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 69 Pre rules applied. Total rules applied 547 place count 405 transition count 600
Deduced a syphon composed of 69 places in 1 ms
Reduce places removed 69 places and 0 transitions.
Iterating global reduction 2 with 138 rules applied. Total rules applied 685 place count 336 transition count 600
Performed 127 Post agglomeration using F-continuation condition.Transition count delta: 127
Deduced a syphon composed of 127 places in 0 ms
Reduce places removed 127 places and 0 transitions.
Iterating global reduction 2 with 254 rules applied. Total rules applied 939 place count 209 transition count 473
Discarding 64 places :
Symmetric choice reduction at 2 with 64 rule applications. Total rules 1003 place count 145 transition count 345
Iterating global reduction 2 with 64 rules applied. Total rules applied 1067 place count 145 transition count 345
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 1068 place count 145 transition count 344
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 1 Pre rules applied. Total rules applied 1068 place count 145 transition count 343
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 3 with 2 rules applied. Total rules applied 1070 place count 144 transition count 343
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1133 place count 81 transition count 217
Iterating global reduction 3 with 63 rules applied. Total rules applied 1196 place count 81 transition count 217
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1259 place count 18 transition count 91
Iterating global reduction 3 with 63 rules applied. Total rules applied 1322 place count 18 transition count 91
Ensure Unique test removed 63 transitions
Reduce isomorphic transitions removed 63 transitions.
Iterating post reduction 3 with 63 rules applied. Total rules applied 1385 place count 18 transition count 28
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 1 Pre rules applied. Total rules applied 1385 place count 18 transition count 27
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 1387 place count 17 transition count 27
Applied a total of 1387 rules in 126 ms. Remains 17 /416 variables (removed 399) and now considering 27/1205 (removed 1178) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 27 rows 17 cols
[2026-05-25 11:41:32] [INFO ] Computed 3 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 11:41:32] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 11:41:32] [INFO ] After 25ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 11:41:32] [INFO ] [Nat]Absence check using 3 positive place invariants in 0 ms returned sat
[2026-05-25 11:41:32] [INFO ] After 6ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2026-05-25 11:41:32] [INFO ] State equation strengthened by 2 read => feed constraints.
[2026-05-25 11:41:32] [INFO ] After 1ms SMT Verify possible using 2 Read/Feed constraints in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-25 11:41:32] [INFO ] After 3ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-25 11:41:32] [INFO ] After 29ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
[2026-05-25 11:41:32] [INFO ] Flatten gal took : 1 ms
[2026-05-25 11:41:32] [INFO ] Flatten gal took : 1 ms
[2026-05-25 11:41:32] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality10471001057363800001.gal : 1 ms
[2026-05-25 11:41:32] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality12160899606822048951.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality10471001057363800001.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality12160899606822048951.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...330
Loading property file /tmp/ReachabilityCardinality12160899606822048951.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :19 after 126
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :126 after 2674
SDD proceeding with computation,1 properties remain. new max is 128
SDD size :2674 after 26178
SDD proceeding with computation,1 properties remain. new max is 256
SDD size :26178 after 3.00733e+06
SDD proceeding with computation,1 properties remain. new max is 512
SDD size :3.00733e+06 after 9.15888e+06
SDD proceeding with computation,1 properties remain. new max is 1024
SDD size :9.15888e+06 after 2.14381e+07
SDD proceeding with computation,1 properties remain. new max is 2048
SDD size :2.14381e+07 after 4.59725e+07
Detected timeout of ITS tools.
[2026-05-25 11:41:47] [INFO ] Flatten gal took : 1 ms
[2026-05-25 11:41:47] [INFO ] Applying decomposition
[2026-05-25 11:41:47] [INFO ] Flatten gal took : 1 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph15123877244731932306.txt' '-o' '/tmp/graph15123877244731932306.bin' '-w' '/tmp/graph15123877244731932306.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph15123877244731932306.bin' '-l' '-1' '-v' '-w' '/tmp/graph15123877244731932306.weights' '-q' '0' '-e' '0.001'
[2026-05-25 11:41:47] [INFO ] Decomposing Gal with order
[2026-05-25 11:41:47] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 11:41:47] [INFO ] Removed a total of 20 redundant transitions.
[2026-05-25 11:41:47] [INFO ] Flatten gal took : 3 ms
[2026-05-25 11:41:47] [INFO ] Fuse similar labels procedure discarded/fused a total of 0 labels/synchronizations in 0 ms.
[2026-05-25 11:41:47] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality8116631019196096587.gal : 0 ms
[2026-05-25 11:41:47] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality12682929748449650450.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality8116631019196096587.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality12682929748449650450.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...308
Loading property file /tmp/ReachabilityCardinality12682929748449650450.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :19 after 126
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :126 after 3170
SDD proceeding with computation,1 properties remain. new max is 128
SDD size :3170 after 75171
Detected timeout of ITS tools.
Detected timeout of ITS tools.
Over-approximation ignoring read arcs solved 0 properties in 30291 ms.
Current structural bounds on expressions (After reachability solving 0 queries.) : Max Seen:[32] Max Struct:[+inf]
Ending property specific reduction for FunctionPointer-PT-c032-UpperBounds-00 in 246802 ms.
Starting property specific reduction for FunctionPointer-PT-c032-UpperBounds-01
Current structural bounds on expressions (Initially) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Adding known information on max bounds.) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Before main loop) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:42:02] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
// Phase 1: matrix 761 rows 463 cols
[2026-05-25 11:42:02] [INFO ] Computed 3 invariants in 11 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0] Max Struct:[+inf]
RANDOM walk for 10003 steps (2 resets) in 33 ms. (294 steps per ms)
BEST_FIRST walk for 10001 steps (2 resets) in 10 ms. (909 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:42:02] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:42:02] [INFO ] Invariant cache hit.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:42:02] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:42:02] [INFO ] [Real]Absence check using state equation in 156 ms returned sat
[2026-05-25 11:42:02] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:42:02] [INFO ] [Real]Added 96 Read/Feed constraints in 37 ms returned sat
[2026-05-25 11:42:02] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:42:02] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:42:02] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:42:02] [INFO ] [Nat]Added 96 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:42:02] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 68 ms.
[2026-05-25 11:42:03] [INFO ] Added : 9 causal constraints over 3 iterations in 267 ms. Result :sat
Minimization took 229 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[0] Max Struct:[+inf]
Support contains 1 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Graph (complete) has 2250 edges and 463 vertex of which 460 are kept as prefixes of interest. Removing 3 places using SCC suffix rule.0 ms
Discarding 3 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 5 transitions
Reduce isomorphic transitions removed 5 transitions.
Iterating post reduction 0 with 5 rules applied. Total rules applied 6 place count 460 transition count 1310
Discarding 9 places :
Symmetric choice reduction at 1 with 9 rule applications. Total rules 15 place count 451 transition count 1288
Iterating global reduction 1 with 9 rules applied. Total rules applied 24 place count 451 transition count 1288
Ensure Unique test removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
Iterating post reduction 1 with 6 rules applied. Total rules applied 30 place count 451 transition count 1282
Discarding 6 places :
Symmetric choice reduction at 2 with 6 rule applications. Total rules 36 place count 445 transition count 1268
Iterating global reduction 2 with 6 rules applied. Total rules applied 42 place count 445 transition count 1268
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 46 place count 441 transition count 1258
Iterating global reduction 2 with 4 rules applied. Total rules applied 50 place count 441 transition count 1258
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 54 place count 437 transition count 1250
Iterating global reduction 2 with 4 rules applied. Total rules applied 58 place count 437 transition count 1250
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 62 place count 433 transition count 1242
Iterating global reduction 2 with 4 rules applied. Total rules applied 66 place count 433 transition count 1242
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 70 place count 429 transition count 1234
Iterating global reduction 2 with 4 rules applied. Total rules applied 74 place count 429 transition count 1234
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 78 place count 425 transition count 1226
Iterating global reduction 2 with 4 rules applied. Total rules applied 82 place count 425 transition count 1226
Discarding 2 places :
Symmetric choice reduction at 2 with 2 rule applications. Total rules 84 place count 423 transition count 1222
Iterating global reduction 2 with 2 rules applied. Total rules applied 86 place count 423 transition count 1222
Discarding 1 places :
Symmetric choice reduction at 2 with 1 rule applications. Total rules 87 place count 422 transition count 1220
Iterating global reduction 2 with 1 rules applied. Total rules applied 88 place count 422 transition count 1220
Applied a total of 88 rules in 196 ms. Remains 422 /463 variables (removed 41) and now considering 1220/1315 (removed 95) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 197 ms. Remains : 422/463 places, 1220/1315 transitions.
[2026-05-25 11:42:03] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {228=1, 320=1, 518=1, 684=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {252=1, 344=1, 670=1, 688=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 68 ms. (steps per millisecond=147 ) properties (out of 1) seen :[1]
Current structural bounds on expressions (after cover walk) : Max Seen:[1] Max Struct:[+inf]
[2026-05-25 11:42:03] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
// Phase 1: matrix 689 rows 422 cols
[2026-05-25 11:42:03] [INFO ] Computed 3 invariants in 8 ms
Current structural bounds on expressions (after invariants) : Max Seen:[1] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2487 ms. (401 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 946 ms. (1055 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[197] Max Struct:[+inf]
[2026-05-25 11:42:07] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:42:07] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:42:07] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:42:07] [INFO ] [Real]Absence check using state equation in 166 ms returned sat
[2026-05-25 11:42:07] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:42:07] [INFO ] [Real]Added 75 Read/Feed constraints in 28 ms returned sat
[2026-05-25 11:42:07] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:42:07] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:42:07] [INFO ] [Nat]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:42:07] [INFO ] [Nat]Added 75 Read/Feed constraints in 21 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:42:08] [INFO ] Deduced a trap composed of 70 places in 247 ms of which 32 ms to minimize.
[2026-05-25 11:42:08] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 301 ms
[2026-05-25 11:42:08] [INFO ] Computed and/alt/rep : 332/1248/332 causal constraints (skipped 355 transitions) in 67 ms.
[2026-05-25 11:42:08] [INFO ] Added : 11 causal constraints over 3 iterations in 378 ms. Result :sat
Minimization took 229 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[197] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[197] Max Struct:[+inf]
Support contains 1 out of 422 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 422/422 places, 1220/1220 transitions.
Applied a total of 0 rules in 49 ms. Remains 422 /422 variables (removed 0) and now considering 1220/1220 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 49 ms. Remains : 422/422 places, 1220/1220 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 422/422 places, 1220/1220 transitions.
Applied a total of 0 rules in 52 ms. Remains 422 /422 variables (removed 0) and now considering 1220/1220 (removed 0) transitions.
[2026-05-25 11:42:08] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:42:08] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:42:09] [INFO ] Implicit Places using invariants in 315 ms returned []
[2026-05-25 11:42:09] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:42:09] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:42:09] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:42:11] [INFO ] Implicit Places using invariants and state equation in 2412 ms returned []
Implicit Place search using SMT with State Equation took 2730 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:42:11] [INFO ] Redundant transitions in 28 ms returned []
Running 1218 sub problems to find dead transitions.
[2026-05-25 11:42:11] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:42:11] [INFO ] Invariant cache hit.
[2026-05-25 11:42:11] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/422 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:42:21] [INFO ] Deduced a trap composed of 131 places in 114 ms of which 4 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/422 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 422/1111 variables, and 4 constraints, problems are : Problem set: 0 solved, 1218 unsolved in 30026 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/422 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1218/1218 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1218 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/422 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/422 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/422 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 3 (OVERLAPS) 689/1111 variables, 422/426 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1111 variables, 75/501 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1111/1111 variables, and 1719 constraints, problems are : Problem set: 0 solved, 1218 unsolved in 30750 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 422/422 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1218/1218 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62386ms problems are : Problem set: 0 solved, 1218 unsolved
Search for dead transitions found 0 dead transitions in 62388ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65210 ms. Remains : 422/422 places, 1220/1220 transitions.
[2026-05-25 11:43:14] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {228=1, 320=1, 518=1, 684=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 344=1, 670=1, 688=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 86 ms. (steps per millisecond=116 ) properties (out of 1) seen :[0]
Current structural bounds on expressions (after cover walk) : Max Seen:[197] Max Struct:[+inf]
[2026-05-25 11:43:14] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:43:14] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[197] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2513 ms. (397 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 936 ms. (1067 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[201] Max Struct:[+inf]
[2026-05-25 11:43:17] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:43:17] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:43:17] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:43:17] [INFO ] [Real]Absence check using state equation in 144 ms returned sat
[2026-05-25 11:43:18] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:43:18] [INFO ] [Real]Added 75 Read/Feed constraints in 27 ms returned sat
[2026-05-25 11:43:18] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:43:18] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:43:18] [INFO ] [Nat]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:43:18] [INFO ] [Nat]Added 75 Read/Feed constraints in 21 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:43:18] [INFO ] Deduced a trap composed of 70 places in 228 ms of which 32 ms to minimize.
[2026-05-25 11:43:18] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 274 ms
[2026-05-25 11:43:18] [INFO ] Computed and/alt/rep : 332/1248/332 causal constraints (skipped 355 transitions) in 70 ms.
[2026-05-25 11:43:18] [INFO ] Added : 11 causal constraints over 3 iterations in 390 ms. Result :sat
Minimization took 231 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[201] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[201] Max Struct:[+inf]
Support contains 1 out of 422 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 422/422 places, 1220/1220 transitions.
Applied a total of 0 rules in 49 ms. Remains 422 /422 variables (removed 0) and now considering 1220/1220 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 49 ms. Remains : 422/422 places, 1220/1220 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 422/422 places, 1220/1220 transitions.
Applied a total of 0 rules in 43 ms. Remains 422 /422 variables (removed 0) and now considering 1220/1220 (removed 0) transitions.
[2026-05-25 11:43:19] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:43:19] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:43:19] [INFO ] Implicit Places using invariants in 295 ms returned []
[2026-05-25 11:43:19] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:43:19] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:43:19] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:43:21] [INFO ] Implicit Places using invariants and state equation in 2357 ms returned []
Implicit Place search using SMT with State Equation took 2667 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:43:21] [INFO ] Redundant transitions in 27 ms returned []
Running 1218 sub problems to find dead transitions.
[2026-05-25 11:43:22] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:43:22] [INFO ] Invariant cache hit.
[2026-05-25 11:43:22] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/422 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:43:32] [INFO ] Deduced a trap composed of 131 places in 136 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/422 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Error getting values : (error "ParserException while parsing response: ((s0 0.0)
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(s98 timeout
0.0)
(s99 org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 422/1111 variables, and 4 constraints, problems are : Problem set: 0 solved, 1218 unsolved in 30032 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/422 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1218/1218 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1218 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/422 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/422 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/422 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 3 (OVERLAPS) 689/1111 variables, 422/426 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1111 variables, 75/501 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1111/1111 variables, and 1719 constraints, problems are : Problem set: 0 solved, 1218 unsolved in 30788 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 422/422 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1218/1218 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62543ms problems are : Problem set: 0 solved, 1218 unsolved
Search for dead transitions found 0 dead transitions in 62545ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65289 ms. Remains : 422/422 places, 1220/1220 transitions.
[2026-05-25 11:44:24] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {228=1, 320=1, 518=1, 684=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 344=1, 670=1, 688=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 66 ms. (steps per millisecond=151 ) properties (out of 1) seen :[0]
Current structural bounds on expressions (after cover walk) : Max Seen:[201] Max Struct:[+inf]
[2026-05-25 11:44:24] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:44:24] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[201] Max Struct:[+inf]
RANDOM walk for 1000001 steps (2 resets) in 2490 ms. (401 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 846 ms. (1180 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[201] Max Struct:[+inf]
[2026-05-25 11:44:28] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:44:28] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:44:28] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:44:28] [INFO ] [Real]Absence check using state equation in 158 ms returned sat
[2026-05-25 11:44:28] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:44:28] [INFO ] [Real]Added 75 Read/Feed constraints in 26 ms returned sat
[2026-05-25 11:44:28] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:44:28] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:44:28] [INFO ] [Nat]Absence check using state equation in 148 ms returned sat
[2026-05-25 11:44:28] [INFO ] [Nat]Added 75 Read/Feed constraints in 22 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:44:28] [INFO ] Deduced a trap composed of 70 places in 212 ms of which 30 ms to minimize.
[2026-05-25 11:44:28] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 260 ms
[2026-05-25 11:44:29] [INFO ] Computed and/alt/rep : 332/1248/332 causal constraints (skipped 355 transitions) in 64 ms.
[2026-05-25 11:44:29] [INFO ] Added : 11 causal constraints over 3 iterations in 379 ms. Result :sat
Minimization took 229 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[201] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[201] Max Struct:[+inf]
Support contains 1 out of 422 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 422/422 places, 1220/1220 transitions.
Applied a total of 0 rules in 52 ms. Remains 422 /422 variables (removed 0) and now considering 1220/1220 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 52 ms. Remains : 422/422 places, 1220/1220 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 422/422 places, 1220/1220 transitions.
Applied a total of 0 rules in 43 ms. Remains 422 /422 variables (removed 0) and now considering 1220/1220 (removed 0) transitions.
[2026-05-25 11:44:29] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:44:29] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:44:29] [INFO ] Implicit Places using invariants in 275 ms returned []
[2026-05-25 11:44:29] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:44:29] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:44:30] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:44:32] [INFO ] Implicit Places using invariants and state equation in 2353 ms returned []
Implicit Place search using SMT with State Equation took 2630 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:44:32] [INFO ] Redundant transitions in 27 ms returned []
Running 1218 sub problems to find dead transitions.
[2026-05-25 11:44:32] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:44:32] [INFO ] Invariant cache hit.
[2026-05-25 11:44:32] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/422 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:44:43] [INFO ] Deduced a trap composed of 131 places in 123 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/422 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Error getting values : (error "ParserException while parsing response: (timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 422/1111 variables, and 4 constraints, problems are : Problem set: 0 solved, 1218 unsolved in 30031 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/422 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1218/1218 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1218 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/422 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/422 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/422 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 3 (OVERLAPS) 689/1111 variables, 422/426 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1111 variables, 75/501 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1111/1111 variables, and 1719 constraints, problems are : Problem set: 0 solved, 1218 unsolved in 30789 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 422/422 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1218/1218 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62501ms problems are : Problem set: 0 solved, 1218 unsolved
Search for dead transitions found 0 dead transitions in 62504ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65209 ms. Remains : 422/422 places, 1220/1220 transitions.
[2026-05-25 11:45:34] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {228=1, 320=1, 518=1, 684=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 344=1, 670=1, 688=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 70 ms. (steps per millisecond=142 ) properties (out of 1) seen :[3]
Current structural bounds on expressions (after cover walk) : Max Seen:[201] Max Struct:[+inf]
[2026-05-25 11:45:35] [INFO ] Flatten gal took : 83 ms
RANDOM walk for 40002 steps (8 resets) in 321 ms. (124 steps per ms) remains 1/1 properties
[2026-05-25 11:45:35] [INFO ] Flatten gal took : 32 ms
BEST_FIRST walk for 40004 steps (8 resets) in 90 ms. (439 steps per ms) remains 1/1 properties
[2026-05-25 11:45:35] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality18117690241872477921.gal : 6 ms
[2026-05-25 11:45:35] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality12968574791188375657.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality18117690241872477921.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality12968574791188375657.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...330
Loading property file /tmp/ReachabilityCardinality12968574791188375657.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 31
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :31 after 1995
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :1995 after 1.24464e+06
Interrupted probabilistic random walk after 522493 steps, run timeout after 3001 ms. (steps per millisecond=174 ) properties seen :0 out of 1
Probabilistic random walk after 522493 steps, saw 320371 distinct states, run finished after 3001 ms. (steps per millisecond=174 ) properties seen :0
[2026-05-25 11:45:38] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:45:38] [INFO ] Invariant cache hit.
[2026-05-25 11:45:38] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 5/8 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/8 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 7/15 variables, 3/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/15 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 10/25 variables, 4/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/25 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 352/377 variables, 8/18 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/377 variables, 2/20 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/377 variables, 0/20 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 12 (OVERLAPS) 7/384 variables, 2/22 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/384 variables, 3/25 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/384 variables, 0/25 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 600/984 variables, 335/360 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/984 variables, 73/433 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/984 variables, 0/433 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 62/1046 variables, 1/434 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/1046 variables, 0/434 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 65/1111 variables, 66/500 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (INCLUDED_ONLY) 0/1111 variables, 0/500 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (OVERLAPS) 0/1111 variables, 0/500 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1111/1111 variables, and 500 constraints, problems are : Problem set: 0 solved, 1 unsolved in 274 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 422/422 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 5/8 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/8 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 7/15 variables, 3/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/15 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 10/25 variables, 4/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/25 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 352/377 variables, 8/18 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/377 variables, 2/20 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/377 variables, 1/21 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/377 variables, 0/21 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 7/384 variables, 2/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/384 variables, 3/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/384 variables, 0/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 600/984 variables, 335/361 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/984 variables, 73/434 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/984 variables, 0/434 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 62/1046 variables, 1/435 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/1046 variables, 0/435 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 65/1111 variables, 66/501 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:45:38] [INFO ] Deduced a trap along path composed of 3 places in 24 ms of which 1 ms to minimize.
At refinement iteration 22 (INCLUDED_ONLY) 0/1111 variables, 1/502 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 23 (INCLUDED_ONLY) 0/1111 variables, 0/502 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 24 (OVERLAPS) 0/1111 variables, 0/502 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1111/1111 variables, and 502 constraints, problems are : Problem set: 0 solved, 1 unsolved in 447 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 422/422 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 1/1 constraints]
After SMT, in 729ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 890 ms.
Support contains 1 out of 422 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 422/422 places, 1220/1220 transitions.
Applied a total of 0 rules in 47 ms. Remains 422 /422 variables (removed 0) and now considering 1220/1220 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 48 ms. Remains : 422/422 places, 1220/1220 transitions.
RANDOM walk for 40003 steps (8 resets) in 176 ms. (226 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (8 resets) in 42 ms. (930 steps per ms) remains 1/1 properties
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :1.24464e+06 after 3.74714e+10
Interrupted probabilistic random walk after 521833 steps, run timeout after 3001 ms. (steps per millisecond=173 ) properties seen :0 out of 1
Probabilistic random walk after 521833 steps, saw 319967 distinct states, run finished after 3001 ms. (steps per millisecond=173 ) properties seen :0
[2026-05-25 11:45:43] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:45:43] [INFO ] Invariant cache hit.
[2026-05-25 11:45:43] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 5/8 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/8 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 7/15 variables, 3/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/15 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 10/25 variables, 4/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/25 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 352/377 variables, 8/18 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/377 variables, 2/20 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/377 variables, 0/20 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 12 (OVERLAPS) 7/384 variables, 2/22 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/384 variables, 3/25 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/384 variables, 0/25 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 600/984 variables, 335/360 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/984 variables, 73/433 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/984 variables, 0/433 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 62/1046 variables, 1/434 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/1046 variables, 0/434 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 65/1111 variables, 66/500 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (INCLUDED_ONLY) 0/1111 variables, 0/500 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (OVERLAPS) 0/1111 variables, 0/500 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1111/1111 variables, and 500 constraints, problems are : Problem set: 0 solved, 1 unsolved in 266 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 422/422 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 5/8 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/8 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 7/15 variables, 3/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/15 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 10/25 variables, 4/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/25 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 352/377 variables, 8/18 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/377 variables, 2/20 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/377 variables, 1/21 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/377 variables, 0/21 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 7/384 variables, 2/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/384 variables, 3/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/384 variables, 0/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 600/984 variables, 335/361 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/984 variables, 73/434 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/984 variables, 0/434 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 62/1046 variables, 1/435 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/1046 variables, 0/435 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 65/1111 variables, 66/501 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:45:43] [INFO ] Deduced a trap along path composed of 3 places in 26 ms of which 0 ms to minimize.
At refinement iteration 22 (INCLUDED_ONLY) 0/1111 variables, 1/502 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 23 (INCLUDED_ONLY) 0/1111 variables, 0/502 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 24 (OVERLAPS) 0/1111 variables, 0/502 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1111/1111 variables, and 502 constraints, problems are : Problem set: 0 solved, 1 unsolved in 445 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 422/422 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 1/1 constraints]
After SMT, in 720ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 991 ms.
Support contains 1 out of 422 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 422/422 places, 1220/1220 transitions.
Applied a total of 0 rules in 46 ms. Remains 422 /422 variables (removed 0) and now considering 1220/1220 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 46 ms. Remains : 422/422 places, 1220/1220 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 422/422 places, 1220/1220 transitions.
Applied a total of 0 rules in 46 ms. Remains 422 /422 variables (removed 0) and now considering 1220/1220 (removed 0) transitions.
[2026-05-25 11:45:44] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:45:44] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:45:45] [INFO ] Implicit Places using invariants in 260 ms returned []
[2026-05-25 11:45:45] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:45:45] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:45:45] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:45:47] [INFO ] Implicit Places using invariants and state equation in 2367 ms returned []
Implicit Place search using SMT with State Equation took 2630 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:45:47] [INFO ] Redundant transitions in 25 ms returned []
Running 1218 sub problems to find dead transitions.
[2026-05-25 11:45:47] [INFO ] Flow matrix only has 689 transitions (discarded 531 similar events)
[2026-05-25 11:45:47] [INFO ] Invariant cache hit.
[2026-05-25 11:45:47] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/422 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:45:58] [INFO ] Deduced a trap composed of 131 places in 112 ms of which 5 ms to minimize.
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :3.74714e+10 after 5.80647e+17
At refinement iteration 1 (INCLUDED_ONLY) 0/422 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 422/1111 variables, and 4 constraints, problems are : Problem set: 0 solved, 1218 unsolved in 30021 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/422 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1218/1218 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1218 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/422 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/422 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Detected timeout of ITS tools.
[2026-05-25 11:46:25] [INFO ] Flatten gal took : 31 ms
[2026-05-25 11:46:25] [INFO ] Applying decomposition
[2026-05-25 11:46:25] [INFO ] Flatten gal took : 28 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph10399478311658489315.txt' '-o' '/tmp/graph10399478311658489315.bin' '-w' '/tmp/graph10399478311658489315.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph10399478311658489315.bin' '-l' '-1' '-v' '-w' '/tmp/graph10399478311658489315.weights' '-q' '0' '-e' '0.001'
[2026-05-25 11:46:25] [INFO ] Decomposing Gal with order
[2026-05-25 11:46:25] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 11:46:25] [INFO ] Removed a total of 2088 redundant transitions.
[2026-05-25 11:46:25] [INFO ] Flatten gal took : 53 ms
[2026-05-25 11:46:25] [INFO ] Fuse similar labels procedure discarded/fused a total of 932 labels/synchronizations in 37 ms.
[2026-05-25 11:46:25] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality15603230476342980573.gal : 12 ms
[2026-05-25 11:46:25] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality12409882200000829628.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality15603230476342980573.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality12409882200000829628.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...309
Loading property file /tmp/ReachabilityCardinality12409882200000829628.prop.
At refinement iteration 2 (INCLUDED_ONLY) 0/422 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 3 (OVERLAPS) 689/1111 variables, 422/426 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1111 variables, 75/501 constraints. Problems are: Problem set: 0 solved, 1218 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1111/1111 variables, and 1719 constraints, problems are : Problem set: 0 solved, 1218 unsolved in 30783 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 422/422 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1218/1218 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62620ms problems are : Problem set: 0 solved, 1218 unsolved
Search for dead transitions found 0 dead transitions in 62622ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65330 ms. Remains : 422/422 places, 1220/1220 transitions.
Attempting over-approximation, by ignoring read arcs.
Ensure Unique test removed 531 transitions
Reduce isomorphic transitions removed 531 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 10 transitions
Trivial Post-agglo rules discarded 10 transitions
Performed 10 trivial Post agglomeration. Transition count delta: 10
Iterating post reduction 0 with 541 rules applied. Total rules applied 541 place count 422 transition count 679
Reduce places removed 10 places and 0 transitions.
Iterating post reduction 1 with 10 rules applied. Total rules applied 551 place count 412 transition count 679
Performed 73 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 73 Pre rules applied. Total rules applied 551 place count 412 transition count 606
Deduced a syphon composed of 73 places in 0 ms
Reduce places removed 73 places and 0 transitions.
Iterating global reduction 2 with 146 rules applied. Total rules applied 697 place count 339 transition count 606
Performed 127 Post agglomeration using F-continuation condition.Transition count delta: 127
Deduced a syphon composed of 127 places in 0 ms
Reduce places removed 127 places and 0 transitions.
Iterating global reduction 2 with 254 rules applied. Total rules applied 951 place count 212 transition count 479
Discarding 64 places :
Symmetric choice reduction at 2 with 64 rule applications. Total rules 1015 place count 148 transition count 351
Iterating global reduction 2 with 64 rules applied. Total rules applied 1079 place count 148 transition count 351
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 1080 place count 148 transition count 350
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1143 place count 85 transition count 224
Iterating global reduction 3 with 63 rules applied. Total rules applied 1206 place count 85 transition count 224
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1269 place count 22 transition count 98
Iterating global reduction 3 with 63 rules applied. Total rules applied 1332 place count 22 transition count 98
Ensure Unique test removed 63 transitions
Reduce isomorphic transitions removed 63 transitions.
Iterating post reduction 3 with 63 rules applied. Total rules applied 1395 place count 22 transition count 35
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 1 Pre rules applied. Total rules applied 1395 place count 22 transition count 34
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 1397 place count 21 transition count 34
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 1399 place count 20 transition count 33
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 1401 place count 19 transition count 33
Applied a total of 1401 rules in 34 ms. Remains 19 /422 variables (removed 403) and now considering 33/1220 (removed 1187) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 33 rows 19 cols
[2026-05-25 11:46:50] [INFO ] Computed 3 invariants in 0 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 11:46:50] [INFO ] [Real]Absence check using 3 positive place invariants in 0 ms returned sat
[2026-05-25 11:46:50] [INFO ] After 8ms SMT Verify possible using state equation in real domain returned unsat :0 sat :1
[2026-05-25 11:46:50] [INFO ] State equation strengthened by 2 read => feed constraints.
[2026-05-25 11:46:50] [INFO ] After 3ms SMT Verify possible using 2 Read/Feed constraints in real domain returned unsat :0 sat :0 real:1
[2026-05-25 11:46:50] [INFO ] After 27ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 11:46:50] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 11:46:50] [INFO ] After 7ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2026-05-25 11:46:50] [INFO ] After 2ms SMT Verify possible using 2 Read/Feed constraints in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-25 11:46:50] [INFO ] After 4ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-25 11:46:50] [INFO ] After 32ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
[2026-05-25 11:46:50] [INFO ] Flatten gal took : 2 ms
[2026-05-25 11:46:50] [INFO ] Flatten gal took : 1 ms
[2026-05-25 11:46:50] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality7117735465900981554.gal : 0 ms
[2026-05-25 11:46:50] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality10265853335534756114.prop : 1 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality7117735465900981554.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality10265853335534756114.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Loading property file /tmp/ReachabilityCardinality10265853335534756114.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :19 after 126
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :126 after 6339
SDD proceeding with computation,1 properties remain. new max is 128
SDD size :6339 after 426547
SDD proceeding with computation,1 properties remain. new max is 256
SDD size :426547 after 1.19848e+06
SDD proceeding with computation,1 properties remain. new max is 512
SDD size :1.19848e+06 after 2.73637e+06
SDD proceeding with computation,1 properties remain. new max is 1024
SDD size :2.73637e+06 after 5.80616e+06
SDD proceeding with computation,1 properties remain. new max is 2048
SDD size :5.80616e+06 after 1.19398e+07
SDD proceeding with computation,1 properties remain. new max is 4096
SDD size :1.19398e+07 after 2.4201e+07
Detected timeout of ITS tools.
[2026-05-25 11:47:05] [INFO ] Flatten gal took : 1 ms
[2026-05-25 11:47:05] [INFO ] Applying decomposition
[2026-05-25 11:47:05] [INFO ] Flatten gal took : 1 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph4270318683446941881.txt' '-o' '/tmp/graph4270318683446941881.bin' '-w' '/tmp/graph4270318683446941881.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph4270318683446941881.bin' '-l' '-1' '-v' '-w' '/tmp/graph4270318683446941881.weights' '-q' '0' '-e' '0.001'
[2026-05-25 11:47:05] [INFO ] Decomposing Gal with order
[2026-05-25 11:47:05] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 11:47:05] [INFO ] Removed a total of 36 redundant transitions.
[2026-05-25 11:47:05] [INFO ] Flatten gal took : 2 ms
[2026-05-25 11:47:05] [INFO ] Fuse similar labels procedure discarded/fused a total of 2 labels/synchronizations in 1 ms.
[2026-05-25 11:47:05] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality16725761004285295297.gal : 1 ms
[2026-05-25 11:47:05] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality18409437909212116417.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality16725761004285295297.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality18409437909212116417.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...309
Loading property file /tmp/ReachabilityCardinality18409437909212116417.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :19 after 126
Detected timeout of ITS tools.
Detected timeout of ITS tools.
Over-approximation ignoring read arcs solved 0 properties in 30173 ms.
Current structural bounds on expressions (After reachability solving 0 queries.) : Max Seen:[201] Max Struct:[+inf]
Ending property specific reduction for FunctionPointer-PT-c032-UpperBounds-01 in 318088 ms.
Starting property specific reduction for FunctionPointer-PT-c032-UpperBounds-02
Current structural bounds on expressions (Initially) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Adding known information on max bounds.) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Before main loop) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:47:20] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
// Phase 1: matrix 761 rows 463 cols
[2026-05-25 11:47:20] [INFO ] Computed 3 invariants in 8 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0] Max Struct:[+inf]
RANDOM walk for 10000 steps (2 resets) in 29 ms. (333 steps per ms)
BEST_FIRST walk for 10001 steps (2 resets) in 7 ms. (1250 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:47:20] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:47:20] [INFO ] Invariant cache hit.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:47:20] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:47:20] [INFO ] [Real]Absence check using state equation in 142 ms returned sat
[2026-05-25 11:47:20] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:47:20] [INFO ] [Real]Added 96 Read/Feed constraints in 20 ms returned sat
[2026-05-25 11:47:20] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:47:20] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:47:20] [INFO ] [Nat]Absence check using state equation in 141 ms returned sat
[2026-05-25 11:47:20] [INFO ] [Nat]Added 96 Read/Feed constraints in 20 ms returned sat
[2026-05-25 11:47:20] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 100 ms.
[2026-05-25 11:47:21] [INFO ] Added : 1 causal constraints over 1 iterations in 191 ms. Result :sat
Minimization took 240 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[0] Max Struct:[+inf]
Support contains 1 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Graph (complete) has 2250 edges and 463 vertex of which 460 are kept as prefixes of interest. Removing 3 places using SCC suffix rule.1 ms
Discarding 3 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 5 transitions
Reduce isomorphic transitions removed 5 transitions.
Iterating post reduction 0 with 5 rules applied. Total rules applied 6 place count 460 transition count 1310
Discarding 9 places :
Symmetric choice reduction at 1 with 9 rule applications. Total rules 15 place count 451 transition count 1288
Iterating global reduction 1 with 9 rules applied. Total rules applied 24 place count 451 transition count 1288
Ensure Unique test removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
Iterating post reduction 1 with 6 rules applied. Total rules applied 30 place count 451 transition count 1282
Discarding 7 places :
Symmetric choice reduction at 2 with 7 rule applications. Total rules 37 place count 444 transition count 1266
Iterating global reduction 2 with 7 rules applied. Total rules applied 44 place count 444 transition count 1266
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 49 place count 439 transition count 1252
Iterating global reduction 2 with 5 rules applied. Total rules applied 54 place count 439 transition count 1252
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 59 place count 434 transition count 1242
Iterating global reduction 2 with 5 rules applied. Total rules applied 64 place count 434 transition count 1242
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 69 place count 429 transition count 1232
Iterating global reduction 2 with 5 rules applied. Total rules applied 74 place count 429 transition count 1232
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 79 place count 424 transition count 1222
Iterating global reduction 2 with 5 rules applied. Total rules applied 84 place count 424 transition count 1222
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 89 place count 419 transition count 1212
Iterating global reduction 2 with 5 rules applied. Total rules applied 94 place count 419 transition count 1212
Discarding 3 places :
Symmetric choice reduction at 2 with 3 rule applications. Total rules 97 place count 416 transition count 1206
Iterating global reduction 2 with 3 rules applied. Total rules applied 100 place count 416 transition count 1206
Discarding 2 places :
Symmetric choice reduction at 2 with 2 rule applications. Total rules 102 place count 414 transition count 1202
Iterating global reduction 2 with 2 rules applied. Total rules applied 104 place count 414 transition count 1202
Applied a total of 104 rules in 127 ms. Remains 414 /463 variables (removed 49) and now considering 1202/1315 (removed 113) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 127 ms. Remains : 414/463 places, 1202/1315 transitions.
[2026-05-25 11:47:21] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {222=1, 307=1, 504=1, 674=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 337=1, 534=1, 674=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 71 ms. (steps per millisecond=140 ) properties (out of 1) seen :[0]
Current structural bounds on expressions (after cover walk) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:47:21] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
// Phase 1: matrix 678 rows 414 cols
[2026-05-25 11:47:21] [INFO ] Computed 3 invariants in 3 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0] Max Struct:[+inf]
RANDOM walk for 1000001 steps (2 resets) in 2673 ms. (373 steps per ms)
BEST_FIRST walk for 1000000 steps (2 resets) in 1024 ms. (975 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:47:25] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:47:25] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:47:25] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:47:25] [INFO ] [Real]Absence check using state equation in 133 ms returned sat
[2026-05-25 11:47:25] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:47:25] [INFO ] [Real]Added 74 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:47:25] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:47:25] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:47:25] [INFO ] [Nat]Absence check using state equation in 129 ms returned sat
[2026-05-25 11:47:25] [INFO ] [Nat]Added 74 Read/Feed constraints in 32 ms returned sat
[2026-05-25 11:47:26] [INFO ] Computed and/alt/rep : 333/1251/331 causal constraints (skipped 345 transitions) in 70 ms.
[2026-05-25 11:47:26] [INFO ] Added : 5 causal constraints over 3 iterations in 208 ms. Result :sat
Minimization took 236 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[0] Max Struct:[+inf]
Support contains 1 out of 414 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 48 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 48 ms. Remains : 414/414 places, 1202/1202 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 48 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
[2026-05-25 11:47:26] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:47:26] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:47:26] [INFO ] Implicit Places using invariants in 285 ms returned []
[2026-05-25 11:47:26] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:47:26] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:47:27] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:47:28] [INFO ] Implicit Places using invariants and state equation in 1376 ms returned []
Implicit Place search using SMT with State Equation took 1663 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:47:28] [INFO ] Redundant transitions in 24 ms returned []
Running 1200 sub problems to find dead transitions.
[2026-05-25 11:47:28] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:47:28] [INFO ] Invariant cache hit.
[2026-05-25 11:47:28] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:47:41] [INFO ] Deduced a trap composed of 131 places in 144 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Error getting values : (error "ParserException while parsing response: ((s0 0.0)
(s1 1.0)
(s2 0.0)
(s3 0.0)
(s4 0.0)
(s5 0.0)
(s6 0.0)
(s7 0.0)
(s8 0.0)
(s9 0.0)
(s10 0.0)
(s11 0.0)
(s12 0.0)
(s13 0.0)
(s14 0.0)
(s15 0.0)
(s16 0.0)
(s17 0.0)
(s18 0.0)
(s19 0.0)
(s20 0.0)
(s21 0.0)
(s22 0.0)
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(s24 0.0)
(s25 0.0)
(s26 0.0)
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(s28 0.0)
(s29 0.0)
(s30 0.0)
(s31 0.0)
(s32 0.0)
(s33 0.0)
(s34 0.0)
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(s37 0.0)
(s38 0.0)
(s39 0.0)
(s40 0.0)
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(s42 0.0)
(s43 0.0)
(s44 0.0)
(s45 0.0)
(s46 0.0)
(s47 0.0)
(s48 0.0)
(s49 0.0)
(s50 0.0)
(s51 0.0)
(s52 0.0)
(s53 0.0)
(s54 0.0)
(s55 0.0)
(s56 0.0)
(s57 0.0)
(s58 0.0)
(s59 0.0)
(s60 0.0)
(s61 0.0)
(s62 0.0)
(s63 0.0)
(s64 0.0)
(s65 0.0)
(s66 0.0)
(s67 0.0)
(s68 0.0)
(s69 0.0)
(s70 0.0)
(s71 0.0)
(s72 0.0)
(s73 0.0)
(s74 0.0)
(s75 0.0)
(s76 0.0)
(s77 0.0)
(s78 0.0)
(s79 0.0)
(s80 0.0)
(s81 0.0)
(s82 0.0)
(s83 0.0)
(s84 0.0)
(s85 0.0)
(s86 0.0)
(s87 0.0)
(s88 0.0)
(s89 0.0)
(s90 0.0)
(s91 0.0)
(s92 0.0)
(s93 0.0)
(s94 0.0)
(s95 0.0)
(s96 0.0)
(s97 0.0)
(s98 0.0)
(s99 0.0)
(s100 0.0)
(s101 timeout
0.0)
(s102 0.0)
( org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 414/1092 variables, and 4 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30023 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/414 constraints, ReadFeed: 0/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1200 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/414 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 3 (OVERLAPS) 678/1092 variables, 414/418 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1092 variables, 74/492 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1092/1092 variables, and 1692 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30923 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 414/414 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62587ms problems are : Problem set: 0 solved, 1200 unsolved
Search for dead transitions found 0 dead transitions in 62589ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64335 ms. Remains : 414/414 places, 1202/1202 transitions.
[2026-05-25 11:48:30] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {222=1, 307=1, 504=1, 674=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 337=1, 534=1, 674=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 66 ms. (steps per millisecond=151 ) properties (out of 1) seen :[4]
Current structural bounds on expressions (after cover walk) : Max Seen:[4] Max Struct:[+inf]
[2026-05-25 11:48:31] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:48:31] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[4] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2439 ms. (409 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 950 ms. (1051 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[1811] Max Struct:[+inf]
[2026-05-25 11:48:34] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:48:34] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:48:34] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:48:34] [INFO ] [Real]Absence check using state equation in 120 ms returned sat
[2026-05-25 11:48:34] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:48:34] [INFO ] [Real]Added 74 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:48:34] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:48:34] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:48:34] [INFO ] [Nat]Absence check using state equation in 135 ms returned sat
[2026-05-25 11:48:34] [INFO ] [Nat]Added 74 Read/Feed constraints in 34 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:48:35] [INFO ] Deduced a trap composed of 70 places in 218 ms of which 25 ms to minimize.
[2026-05-25 11:48:35] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 272 ms
[2026-05-25 11:48:35] [INFO ] Computed and/alt/rep : 333/1251/331 causal constraints (skipped 345 transitions) in 75 ms.
[2026-05-25 11:48:35] [INFO ] Added : 7 causal constraints over 4 iterations in 254 ms. Result :sat
Minimization took 257 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[1811] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[1812] Max Struct:[+inf]
Support contains 1 out of 414 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 53 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 53 ms. Remains : 414/414 places, 1202/1202 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 49 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
[2026-05-25 11:48:41] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:48:41] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:48:42] [INFO ] Implicit Places using invariants in 287 ms returned []
[2026-05-25 11:48:42] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:48:42] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:48:42] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:48:43] [INFO ] Implicit Places using invariants and state equation in 1331 ms returned []
Implicit Place search using SMT with State Equation took 1620 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:48:43] [INFO ] Redundant transitions in 25 ms returned []
Running 1200 sub problems to find dead transitions.
[2026-05-25 11:48:43] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:48:43] [INFO ] Invariant cache hit.
[2026-05-25 11:48:43] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:48:56] [INFO ] Deduced a trap composed of 131 places in 124 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 414/1092 variables, and 4 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30021 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/414 constraints, ReadFeed: 0/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1200 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/414 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 3 (OVERLAPS) 678/1092 variables, 414/418 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1092 variables, 74/492 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1092/1092 variables, and 1692 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30752 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 414/414 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62455ms problems are : Problem set: 0 solved, 1200 unsolved
Search for dead transitions found 0 dead transitions in 62456ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64156 ms. Remains : 414/414 places, 1202/1202 transitions.
[2026-05-25 11:49:45] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {222=1, 307=1, 504=1, 674=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 337=1, 534=1, 674=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 65 ms. (steps per millisecond=153 ) properties (out of 1) seen :[6]
Current structural bounds on expressions (after cover walk) : Max Seen:[1812] Max Struct:[+inf]
[2026-05-25 11:49:46] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:49:46] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[1812] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2375 ms. (420 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 896 ms. (1114 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[1812] Max Struct:[+inf]
[2026-05-25 11:49:49] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:49:49] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:49:49] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:49:49] [INFO ] [Real]Absence check using state equation in 118 ms returned sat
[2026-05-25 11:49:49] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:49:49] [INFO ] [Real]Added 74 Read/Feed constraints in 31 ms returned sat
[2026-05-25 11:49:49] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:49:49] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:49:49] [INFO ] [Nat]Absence check using state equation in 116 ms returned sat
[2026-05-25 11:49:49] [INFO ] [Nat]Added 74 Read/Feed constraints in 28 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:49:50] [INFO ] Deduced a trap composed of 70 places in 223 ms of which 26 ms to minimize.
[2026-05-25 11:49:50] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 284 ms
[2026-05-25 11:49:50] [INFO ] Computed and/alt/rep : 333/1251/331 causal constraints (skipped 345 transitions) in 63 ms.
[2026-05-25 11:49:50] [INFO ] Added : 7 causal constraints over 4 iterations in 248 ms. Result :sat
Minimization took 233 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[1812] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[1813] Max Struct:[+inf]
Support contains 1 out of 414 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 53 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 54 ms. Remains : 414/414 places, 1202/1202 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 52 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
[2026-05-25 11:49:56] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:49:56] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:49:56] [INFO ] Implicit Places using invariants in 281 ms returned []
[2026-05-25 11:49:56] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:49:56] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:49:56] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:49:58] [INFO ] Implicit Places using invariants and state equation in 1342 ms returned []
Implicit Place search using SMT with State Equation took 1625 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:49:58] [INFO ] Redundant transitions in 26 ms returned []
Running 1200 sub problems to find dead transitions.
[2026-05-25 11:49:58] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:49:58] [INFO ] Invariant cache hit.
[2026-05-25 11:49:58] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:50:10] [INFO ] Deduced a trap composed of 131 places in 119 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
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0.0 org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 414/1092 variables, and 4 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30021 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/414 constraints, ReadFeed: 0/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1200 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/414 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 3 (OVERLAPS) 678/1092 variables, 414/418 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1092 variables, 74/492 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1092/1092 variables, and 1692 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30750 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 414/414 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62412ms problems are : Problem set: 0 solved, 1200 unsolved
Search for dead transitions found 0 dead transitions in 62413ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64128 ms. Remains : 414/414 places, 1202/1202 transitions.
[2026-05-25 11:51:00] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {222=1, 307=1, 504=1, 674=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {252=1, 337=1, 534=1, 674=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 67 ms. (steps per millisecond=149 ) properties (out of 1) seen :[3]
Current structural bounds on expressions (after cover walk) : Max Seen:[1813] Max Struct:[+inf]
[2026-05-25 11:51:00] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:51:00] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[1813] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2482 ms. (402 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 920 ms. (1085 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[1813] Max Struct:[+inf]
[2026-05-25 11:51:04] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:51:04] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:51:04] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:51:04] [INFO ] [Real]Absence check using state equation in 125 ms returned sat
[2026-05-25 11:51:04] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:51:04] [INFO ] [Real]Added 74 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:51:04] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:51:04] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:51:04] [INFO ] [Nat]Absence check using state equation in 133 ms returned sat
[2026-05-25 11:51:04] [INFO ] [Nat]Added 74 Read/Feed constraints in 29 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:51:04] [INFO ] Deduced a trap composed of 70 places in 225 ms of which 25 ms to minimize.
[2026-05-25 11:51:04] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 271 ms
[2026-05-25 11:51:05] [INFO ] Computed and/alt/rep : 333/1251/331 causal constraints (skipped 345 transitions) in 69 ms.
[2026-05-25 11:51:05] [INFO ] Added : 7 causal constraints over 4 iterations in 261 ms. Result :sat
Minimization took 217 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[1813] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[1813] Max Struct:[+inf]
Support contains 1 out of 414 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 69 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 69 ms. Remains : 414/414 places, 1202/1202 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 49 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
[2026-05-25 11:51:11] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:51:11] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:51:11] [INFO ] Implicit Places using invariants in 296 ms returned []
[2026-05-25 11:51:11] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:51:11] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:51:11] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:51:12] [INFO ] Implicit Places using invariants and state equation in 1383 ms returned []
Implicit Place search using SMT with State Equation took 1682 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:51:13] [INFO ] Redundant transitions in 19 ms returned []
Running 1200 sub problems to find dead transitions.
[2026-05-25 11:51:13] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:51:13] [INFO ] Invariant cache hit.
[2026-05-25 11:51:13] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:51:25] [INFO ] Deduced a trap composed of 131 places in 139 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Error getting values : (error "ParserException while parsing response: (timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 414/1092 variables, and 4 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30016 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/414 constraints, ReadFeed: 0/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1200 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/414 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 3 (OVERLAPS) 678/1092 variables, 414/418 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1092 variables, 74/492 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1092/1092 variables, and 1692 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30844 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 414/414 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62627ms problems are : Problem set: 0 solved, 1200 unsolved
Search for dead transitions found 0 dead transitions in 62629ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64391 ms. Remains : 414/414 places, 1202/1202 transitions.
[2026-05-25 11:52:15] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {222=1, 307=1, 504=1, 674=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 337=1, 534=1, 674=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 67 ms. (steps per millisecond=149 ) properties (out of 1) seen :[8]
Current structural bounds on expressions (after cover walk) : Max Seen:[1813] Max Struct:[+inf]
[2026-05-25 11:52:15] [INFO ] Flatten gal took : 26 ms
[2026-05-25 11:52:15] [INFO ] Flatten gal took : 27 ms
[2026-05-25 11:52:15] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality16216411275617566606.gal : 5 ms
[2026-05-25 11:52:15] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality11538058731132834217.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality16216411275617566606.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality11538058731132834217.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...330
RANDOM walk for 40002 steps (8 resets) in 278 ms. (143 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (8 resets) in 37 ms. (1052 steps per ms) remains 1/1 properties
Loading property file /tmp/ReachabilityCardinality11538058731132834217.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 31
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :31 after 1995
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :1995 after 1.24464e+06
Interrupted probabilistic random walk after 554534 steps, run timeout after 3001 ms. (steps per millisecond=184 ) properties seen :0 out of 1
Probabilistic random walk after 554534 steps, saw 340016 distinct states, run finished after 3001 ms. (steps per millisecond=184 ) properties seen :0
[2026-05-25 11:52:19] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:52:19] [INFO ] Invariant cache hit.
[2026-05-25 11:52:19] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 3/4 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/4 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 343/347 variables, 5/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/347 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 6/353 variables, 2/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/353 variables, 2/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/353 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 596/949 variables, 333/343 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (INCLUDED_ONLY) 0/949 variables, 74/417 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/949 variables, 0/417 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 62/1011 variables, 1/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/1011 variables, 0/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 67/1078 variables, 65/483 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/1078 variables, 0/483 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 8/1086 variables, 4/487 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/1086 variables, 0/487 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 6/1092 variables, 4/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/1092 variables, 0/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/1092 variables, 0/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1092/1092 variables, and 491 constraints, problems are : Problem set: 0 solved, 1 unsolved in 317 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 414/414 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 3/4 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/4 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 343/347 variables, 5/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/347 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 6/353 variables, 2/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/353 variables, 2/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/353 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 596/949 variables, 333/343 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/949 variables, 74/417 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/949 variables, 1/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/949 variables, 0/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 62/1011 variables, 1/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/1011 variables, 0/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 67/1078 variables, 65/484 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/1078 variables, 0/484 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 8/1086 variables, 4/488 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1086 variables, 0/488 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 6/1092 variables, 4/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/1092 variables, 0/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/1092 variables, 0/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1092/1092 variables, and 492 constraints, problems are : Problem set: 0 solved, 1 unsolved in 388 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 414/414 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 712ms problems are : Problem set: 0 solved, 1 unsolved
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :1.24464e+06 after 3.74714e+10
Parikh walk visited 0 properties in 4297 ms.
Support contains 1 out of 414 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 43 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 43 ms. Remains : 414/414 places, 1202/1202 transitions.
RANDOM walk for 40004 steps (8 resets) in 146 ms. (272 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (8 resets) in 42 ms. (930 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 522482 steps, run timeout after 3001 ms. (steps per millisecond=174 ) properties seen :0 out of 1
Probabilistic random walk after 522482 steps, saw 320368 distinct states, run finished after 3001 ms. (steps per millisecond=174 ) properties seen :0
[2026-05-25 11:52:27] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:52:27] [INFO ] Invariant cache hit.
[2026-05-25 11:52:27] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 3/4 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/4 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 343/347 variables, 5/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/347 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 6/353 variables, 2/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/353 variables, 2/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/353 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 596/949 variables, 333/343 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (INCLUDED_ONLY) 0/949 variables, 74/417 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/949 variables, 0/417 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 62/1011 variables, 1/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/1011 variables, 0/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 67/1078 variables, 65/483 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/1078 variables, 0/483 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 8/1086 variables, 4/487 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/1086 variables, 0/487 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 6/1092 variables, 4/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/1092 variables, 0/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/1092 variables, 0/491 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1092/1092 variables, and 491 constraints, problems are : Problem set: 0 solved, 1 unsolved in 323 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 414/414 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 3/4 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/4 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 343/347 variables, 5/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/347 variables, 0/6 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 6/353 variables, 2/8 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/353 variables, 2/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/353 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 596/949 variables, 333/343 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/949 variables, 74/417 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/949 variables, 1/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/949 variables, 0/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 62/1011 variables, 1/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/1011 variables, 0/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 67/1078 variables, 65/484 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/1078 variables, 0/484 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 8/1086 variables, 4/488 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1086 variables, 0/488 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 6/1092 variables, 4/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/1092 variables, 0/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/1092 variables, 0/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1092/1092 variables, and 492 constraints, problems are : Problem set: 0 solved, 1 unsolved in 406 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 414/414 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 736ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 4766 ms.
Support contains 1 out of 414 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 54 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 54 ms. Remains : 414/414 places, 1202/1202 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 414/414 places, 1202/1202 transitions.
Applied a total of 0 rules in 58 ms. Remains 414 /414 variables (removed 0) and now considering 1202/1202 (removed 0) transitions.
[2026-05-25 11:52:32] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:52:32] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:52:33] [INFO ] Implicit Places using invariants in 281 ms returned []
[2026-05-25 11:52:33] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:52:33] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:52:33] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:52:34] [INFO ] Implicit Places using invariants and state equation in 1365 ms returned []
Implicit Place search using SMT with State Equation took 1647 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:52:34] [INFO ] Redundant transitions in 23 ms returned []
Running 1200 sub problems to find dead transitions.
[2026-05-25 11:52:34] [INFO ] Flow matrix only has 678 transitions (discarded 524 similar events)
[2026-05-25 11:52:34] [INFO ] Invariant cache hit.
[2026-05-25 11:52:34] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :3.74714e+10 after 5.80647e+17
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:52:47] [INFO ] Deduced a trap composed of 131 places in 126 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Detected timeout of ITS tools.
[2026-05-25 11:53:06] [INFO ] Flatten gal took : 26 ms
[2026-05-25 11:53:06] [INFO ] Applying decomposition
[2026-05-25 11:53:06] [INFO ] Flatten gal took : 25 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph11336209028335615606.txt' '-o' '/tmp/graph11336209028335615606.bin' '-w' '/tmp/graph11336209028335615606.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph11336209028335615606.bin' '-l' '-1' '-v' '-w' '/tmp/graph11336209028335615606.weights' '-q' '0' '-e' '0.001'
[2026-05-25 11:53:06] [INFO ] Decomposing Gal with order
[2026-05-25 11:53:06] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 11:53:06] [INFO ] Removed a total of 2053 redundant transitions.
[2026-05-25 11:53:06] [INFO ] Flatten gal took : 46 ms
[2026-05-25 11:53:06] [INFO ] Fuse similar labels procedure discarded/fused a total of 911 labels/synchronizations in 35 ms.
[2026-05-25 11:53:06] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality14670519717665098074.gal : 5 ms
[2026-05-25 11:53:06] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality4868311176850243336.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality14670519717665098074.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality4868311176850243336.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...308
Loading property file /tmp/ReachabilityCardinality4868311176850243336.prop.
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 414/1092 variables, and 4 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30024 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/414 constraints, ReadFeed: 0/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1200 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/414 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/414 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/414 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 3 (OVERLAPS) 678/1092 variables, 414/418 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1092 variables, 74/492 constraints. Problems are: Problem set: 0 solved, 1200 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1092/1092 variables, and 1692 constraints, problems are : Problem set: 0 solved, 1200 unsolved in 30869 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 414/414 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1200/1200 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62920ms problems are : Problem set: 0 solved, 1200 unsolved
Search for dead transitions found 0 dead transitions in 62922ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64655 ms. Remains : 414/414 places, 1202/1202 transitions.
Attempting over-approximation, by ignoring read arcs.
Ensure Unique test removed 524 transitions
Reduce isomorphic transitions removed 524 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 10 transitions
Trivial Post-agglo rules discarded 10 transitions
Performed 10 trivial Post agglomeration. Transition count delta: 10
Iterating post reduction 0 with 534 rules applied. Total rules applied 534 place count 414 transition count 668
Reduce places removed 10 places and 0 transitions.
Iterating post reduction 1 with 10 rules applied. Total rules applied 544 place count 404 transition count 668
Performed 68 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 68 Pre rules applied. Total rules applied 544 place count 404 transition count 600
Deduced a syphon composed of 68 places in 0 ms
Reduce places removed 68 places and 0 transitions.
Iterating global reduction 2 with 136 rules applied. Total rules applied 680 place count 336 transition count 600
Performed 128 Post agglomeration using F-continuation condition.Transition count delta: 128
Deduced a syphon composed of 128 places in 0 ms
Reduce places removed 128 places and 0 transitions.
Iterating global reduction 2 with 256 rules applied. Total rules applied 936 place count 208 transition count 472
Discarding 64 places :
Symmetric choice reduction at 2 with 64 rule applications. Total rules 1000 place count 144 transition count 344
Iterating global reduction 2 with 64 rules applied. Total rules applied 1064 place count 144 transition count 344
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 1065 place count 144 transition count 343
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 1 Pre rules applied. Total rules applied 1065 place count 144 transition count 342
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 3 with 2 rules applied. Total rules applied 1067 place count 143 transition count 342
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1130 place count 80 transition count 216
Iterating global reduction 3 with 63 rules applied. Total rules applied 1193 place count 80 transition count 216
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1256 place count 17 transition count 90
Iterating global reduction 3 with 63 rules applied. Total rules applied 1319 place count 17 transition count 90
Ensure Unique test removed 63 transitions
Reduce isomorphic transitions removed 63 transitions.
Iterating post reduction 3 with 63 rules applied. Total rules applied 1382 place count 17 transition count 27
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 1 Pre rules applied. Total rules applied 1382 place count 17 transition count 26
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 1384 place count 16 transition count 26
Drop transitions (Redundant composition of simpler transitions.) removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 4 with 2 rules applied. Total rules applied 1386 place count 16 transition count 24
Applied a total of 1386 rules in 20 ms. Remains 16 /414 variables (removed 398) and now considering 24/1202 (removed 1178) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 24 rows 16 cols
[2026-05-25 11:53:37] [INFO ] Computed 3 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 11:53:37] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 11:53:37] [INFO ] After 6ms SMT Verify possible using state equation in real domain returned unsat :0 sat :1
[2026-05-25 11:53:37] [INFO ] State equation strengthened by 2 read => feed constraints.
[2026-05-25 11:53:37] [INFO ] After 2ms SMT Verify possible using 2 Read/Feed constraints in real domain returned unsat :0 sat :0 real:1
[2026-05-25 11:53:37] [INFO ] After 28ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 11:53:37] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 11:53:37] [INFO ] After 6ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2026-05-25 11:53:37] [INFO ] After 2ms SMT Verify possible using 2 Read/Feed constraints in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-25 11:53:37] [INFO ] After 3ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-25 11:53:37] [INFO ] After 30ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
[2026-05-25 11:53:37] [INFO ] Flatten gal took : 0 ms
[2026-05-25 11:53:37] [INFO ] Flatten gal took : 0 ms
[2026-05-25 11:53:37] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality4461504688541063873.gal : 1 ms
[2026-05-25 11:53:37] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality15254575022457582648.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality4461504688541063873.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality15254575022457582648.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Loading property file /tmp/ReachabilityCardinality15254575022457582648.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :19 after 126
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :126 after 2674
SDD proceeding with computation,1 properties remain. new max is 128
SDD size :2674 after 26178
SDD proceeding with computation,1 properties remain. new max is 256
SDD size :26178 after 3.00733e+06
SDD proceeding with computation,1 properties remain. new max is 512
SDD size :3.00733e+06 after 9.15888e+06
SDD proceeding with computation,1 properties remain. new max is 1024
SDD size :9.15888e+06 after 2.14381e+07
Invariant property MIN0 does not hold.
Found states matching all0 target predicate
Will report total states built up to this point. Computation was interrupted after 1025 fixpoint passes
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
petri\_inst\_inst,4.59725e+07,4.48126,111576,2,197,15,20037,6,0,88,12266,0
Total reachable state count : 45972451
Verifying 1 reachability properties.
Invariant property MIN0 does not hold.
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
MIN0,23936,4.4817,111576,2,176,15,20037,7,0,91,12266,0
Over-approximation ignoring read arcs solved 0 properties in 4575 ms.
ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
Current structural bounds on expressions (After reachability solving 0 queries.) : Max Seen:[1813] Max Struct:[+inf]
Ending property specific reduction for FunctionPointer-PT-c032-UpperBounds-02 in 381637 ms.
Starting property specific reduction for FunctionPointer-PT-c032-UpperBounds-03
Current structural bounds on expressions (Initially) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Adding known information on max bounds.) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Before main loop) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:53:41] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
// Phase 1: matrix 761 rows 463 cols
[2026-05-25 11:53:41] [INFO ] Computed 3 invariants in 2 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0] Max Struct:[+inf]
RANDOM walk for 10000 steps (2 resets) in 35 ms. (277 steps per ms)
BEST_FIRST walk for 10000 steps (2 resets) in 7 ms. (1250 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:53:41] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:53:41] [INFO ] Invariant cache hit.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:53:42] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:53:42] [INFO ] [Real]Absence check using state equation in 132 ms returned sat
[2026-05-25 11:53:42] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:53:42] [INFO ] [Real]Added 96 Read/Feed constraints in 22 ms returned sat
[2026-05-25 11:53:42] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:53:42] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:53:42] [INFO ] [Nat]Absence check using state equation in 139 ms returned sat
[2026-05-25 11:53:42] [INFO ] [Nat]Added 96 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:53:42] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 73 ms.
[2026-05-25 11:53:42] [INFO ] Added : 1 causal constraints over 1 iterations in 188 ms. Result :sat
Minimization took 255 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[0] Max Struct:[+inf]
Support contains 1 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Graph (complete) has 2250 edges and 463 vertex of which 460 are kept as prefixes of interest. Removing 3 places using SCC suffix rule.0 ms
Discarding 3 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 5 transitions
Reduce isomorphic transitions removed 5 transitions.
Iterating post reduction 0 with 5 rules applied. Total rules applied 6 place count 460 transition count 1310
Discarding 9 places :
Symmetric choice reduction at 1 with 9 rule applications. Total rules 15 place count 451 transition count 1288
Iterating global reduction 1 with 9 rules applied. Total rules applied 24 place count 451 transition count 1288
Ensure Unique test removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Iterating post reduction 1 with 4 rules applied. Total rules applied 28 place count 451 transition count 1284
Discarding 6 places :
Symmetric choice reduction at 2 with 6 rule applications. Total rules 34 place count 445 transition count 1270
Iterating global reduction 2 with 6 rules applied. Total rules applied 40 place count 445 transition count 1270
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 45 place count 440 transition count 1256
Iterating global reduction 2 with 5 rules applied. Total rules applied 50 place count 440 transition count 1256
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 55 place count 435 transition count 1246
Iterating global reduction 2 with 5 rules applied. Total rules applied 60 place count 435 transition count 1246
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 65 place count 430 transition count 1236
Iterating global reduction 2 with 5 rules applied. Total rules applied 70 place count 430 transition count 1236
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 75 place count 425 transition count 1226
Iterating global reduction 2 with 5 rules applied. Total rules applied 80 place count 425 transition count 1226
Discarding 5 places :
Symmetric choice reduction at 2 with 5 rule applications. Total rules 85 place count 420 transition count 1216
Iterating global reduction 2 with 5 rules applied. Total rules applied 90 place count 420 transition count 1216
Discarding 3 places :
Symmetric choice reduction at 2 with 3 rule applications. Total rules 93 place count 417 transition count 1210
Iterating global reduction 2 with 3 rules applied. Total rules applied 96 place count 417 transition count 1210
Discarding 2 places :
Symmetric choice reduction at 2 with 2 rule applications. Total rules 98 place count 415 transition count 1206
Iterating global reduction 2 with 2 rules applied. Total rules applied 100 place count 415 transition count 1206
Applied a total of 100 rules in 121 ms. Remains 415 /463 variables (removed 48) and now considering 1206/1315 (removed 109) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 121 ms. Remains : 415/463 places, 1206/1315 transitions.
[2026-05-25 11:53:43] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {228=1, 256=1, 259=1, 315=1, 512=1, 675=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 339=1, 664=1, 678=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 67 ms. (steps per millisecond=149 ) properties (out of 1) seen :[3]
Current structural bounds on expressions (after cover walk) : Max Seen:[3] Max Struct:[+inf]
[2026-05-25 11:53:43] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
// Phase 1: matrix 680 rows 415 cols
[2026-05-25 11:53:43] [INFO ] Computed 3 invariants in 8 ms
Current structural bounds on expressions (after invariants) : Max Seen:[3] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2370 ms. (421 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 893 ms. (1118 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[688] Max Struct:[+inf]
[2026-05-25 11:53:46] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:53:46] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:53:46] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:53:46] [INFO ] [Real]Absence check using state equation in 115 ms returned sat
[2026-05-25 11:53:46] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:53:47] [INFO ] [Real]Added 74 Read/Feed constraints in 22 ms returned sat
[2026-05-25 11:53:47] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:53:47] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:53:47] [INFO ] [Nat]Absence check using state equation in 128 ms returned sat
[2026-05-25 11:53:47] [INFO ] [Nat]Added 74 Read/Feed constraints in 23 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:53:47] [INFO ] Deduced a trap composed of 70 places in 202 ms of which 25 ms to minimize.
[2026-05-25 11:53:47] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 258 ms
[2026-05-25 11:53:47] [INFO ] Computed and/alt/rep : 333/1252/331 causal constraints (skipped 347 transitions) in 69 ms.
[2026-05-25 11:53:47] [INFO ] Added : 5 causal constraints over 2 iterations in 245 ms. Result :sat
Minimization took 234 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[688] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[688] Max Struct:[+inf]
Support contains 1 out of 415 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 415/415 places, 1206/1206 transitions.
Applied a total of 0 rules in 42 ms. Remains 415 /415 variables (removed 0) and now considering 1206/1206 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 42 ms. Remains : 415/415 places, 1206/1206 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 415/415 places, 1206/1206 transitions.
Applied a total of 0 rules in 42 ms. Remains 415 /415 variables (removed 0) and now considering 1206/1206 (removed 0) transitions.
[2026-05-25 11:53:49] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:53:49] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:53:50] [INFO ] Implicit Places using invariants in 283 ms returned []
[2026-05-25 11:53:50] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:53:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:53:50] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:53:51] [INFO ] Implicit Places using invariants and state equation in 1646 ms returned []
Implicit Place search using SMT with State Equation took 1930 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:53:51] [INFO ] Redundant transitions in 28 ms returned []
Running 1204 sub problems to find dead transitions.
[2026-05-25 11:53:51] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:53:51] [INFO ] Invariant cache hit.
[2026-05-25 11:53:51] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/415 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:54:03] [INFO ] Deduced a trap composed of 131 places in 118 ms of which 4 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/415 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
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(s400 timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 415/1095 variables, and 4 constraints, problems are : Problem set: 0 solved, 1204 unsolved in 30024 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/415 constraints, ReadFeed: 0/74 constraints, PredecessorRefiner: 1204/1204 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1204 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/415 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/415 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/415 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 3 (OVERLAPS) 680/1095 variables, 415/419 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1095 variables, 74/493 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1095/1095 variables, and 1697 constraints, problems are : Problem set: 0 solved, 1204 unsolved in 30859 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 415/415 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1204/1204 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62459ms problems are : Problem set: 0 solved, 1204 unsolved
Search for dead transitions found 0 dead transitions in 62461ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64473 ms. Remains : 415/415 places, 1206/1206 transitions.
[2026-05-25 11:54:54] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {228=1, 256=1, 259=1, 315=1, 512=1, 675=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {252=1, 339=1, 664=1, 678=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 68 ms. (steps per millisecond=147 ) properties (out of 1) seen :[2]
Current structural bounds on expressions (after cover walk) : Max Seen:[688] Max Struct:[+inf]
[2026-05-25 11:54:54] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:54:54] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[688] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2429 ms. (411 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 941 ms. (1061 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[729] Max Struct:[+inf]
[2026-05-25 11:54:58] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:54:58] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:54:58] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:54:58] [INFO ] [Real]Absence check using state equation in 124 ms returned sat
[2026-05-25 11:54:58] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:54:58] [INFO ] [Real]Added 74 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:54:58] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:54:58] [INFO ] [Nat]Absence check using 3 positive place invariants in 5 ms returned sat
[2026-05-25 11:54:58] [INFO ] [Nat]Absence check using state equation in 122 ms returned sat
[2026-05-25 11:54:58] [INFO ] [Nat]Added 74 Read/Feed constraints in 24 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:54:58] [INFO ] Deduced a trap composed of 70 places in 213 ms of which 25 ms to minimize.
[2026-05-25 11:54:58] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 260 ms
[2026-05-25 11:54:58] [INFO ] Computed and/alt/rep : 333/1252/331 causal constraints (skipped 347 transitions) in 66 ms.
[2026-05-25 11:54:59] [INFO ] Added : 5 causal constraints over 2 iterations in 254 ms. Result :sat
Minimization took 235 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[729] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[729] Max Struct:[+inf]
Support contains 1 out of 415 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 415/415 places, 1206/1206 transitions.
Applied a total of 0 rules in 56 ms. Remains 415 /415 variables (removed 0) and now considering 1206/1206 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 57 ms. Remains : 415/415 places, 1206/1206 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 415/415 places, 1206/1206 transitions.
Applied a total of 0 rules in 47 ms. Remains 415 /415 variables (removed 0) and now considering 1206/1206 (removed 0) transitions.
[2026-05-25 11:55:01] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:55:01] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:55:01] [INFO ] Implicit Places using invariants in 278 ms returned []
[2026-05-25 11:55:01] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:55:01] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:55:01] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:55:03] [INFO ] Implicit Places using invariants and state equation in 1602 ms returned []
Implicit Place search using SMT with State Equation took 1882 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:55:03] [INFO ] Redundant transitions in 27 ms returned []
Running 1204 sub problems to find dead transitions.
[2026-05-25 11:55:03] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:55:03] [INFO ] Invariant cache hit.
[2026-05-25 11:55:03] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/415 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:55:16] [INFO ] Deduced a trap composed of 131 places in 125 ms of which 4 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/415 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 415/1095 variables, and 4 constraints, problems are : Problem set: 0 solved, 1204 unsolved in 30019 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/415 constraints, ReadFeed: 0/74 constraints, PredecessorRefiner: 1204/1204 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1204 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/415 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/415 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/415 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 3 (OVERLAPS) 680/1095 variables, 415/419 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1095 variables, 74/493 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1095/1095 variables, and 1697 constraints, problems are : Problem set: 0 solved, 1204 unsolved in 30767 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 415/415 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1204/1204 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62546ms problems are : Problem set: 0 solved, 1204 unsolved
Search for dead transitions found 0 dead transitions in 62548ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64510 ms. Remains : 415/415 places, 1206/1206 transitions.
[2026-05-25 11:56:05] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {228=1, 256=1, 259=1, 315=1, 512=1, 675=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 339=1, 664=1, 678=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 67 ms. (steps per millisecond=149 ) properties (out of 1) seen :[2]
Current structural bounds on expressions (after cover walk) : Max Seen:[729] Max Struct:[+inf]
[2026-05-25 11:56:06] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:56:06] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[729] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2417 ms. (413 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 874 ms. (1142 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[729] Max Struct:[+inf]
[2026-05-25 11:56:09] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:56:09] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:56:09] [INFO ] [Real]Absence check using 3 positive place invariants in 3 ms returned sat
[2026-05-25 11:56:09] [INFO ] [Real]Absence check using state equation in 122 ms returned sat
[2026-05-25 11:56:09] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:56:09] [INFO ] [Real]Added 74 Read/Feed constraints in 19 ms returned sat
[2026-05-25 11:56:09] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:56:09] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:56:09] [INFO ] [Nat]Absence check using state equation in 121 ms returned sat
[2026-05-25 11:56:09] [INFO ] [Nat]Added 74 Read/Feed constraints in 28 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:56:09] [INFO ] Deduced a trap composed of 70 places in 211 ms of which 24 ms to minimize.
[2026-05-25 11:56:10] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 269 ms
[2026-05-25 11:56:10] [INFO ] Computed and/alt/rep : 333/1252/331 causal constraints (skipped 347 transitions) in 72 ms.
[2026-05-25 11:56:10] [INFO ] Added : 5 causal constraints over 2 iterations in 252 ms. Result :sat
Minimization took 250 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[729] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[729] Max Struct:[+inf]
Support contains 1 out of 415 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 415/415 places, 1206/1206 transitions.
Applied a total of 0 rules in 42 ms. Remains 415 /415 variables (removed 0) and now considering 1206/1206 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 43 ms. Remains : 415/415 places, 1206/1206 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 415/415 places, 1206/1206 transitions.
Applied a total of 0 rules in 41 ms. Remains 415 /415 variables (removed 0) and now considering 1206/1206 (removed 0) transitions.
[2026-05-25 11:56:12] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:56:12] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:56:12] [INFO ] Implicit Places using invariants in 309 ms returned []
[2026-05-25 11:56:12] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:56:12] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:56:12] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:56:14] [INFO ] Implicit Places using invariants and state equation in 1679 ms returned []
Implicit Place search using SMT with State Equation took 1990 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:56:14] [INFO ] Redundant transitions in 21 ms returned []
Running 1204 sub problems to find dead transitions.
[2026-05-25 11:56:14] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:56:14] [INFO ] Invariant cache hit.
[2026-05-25 11:56:14] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/415 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:56:26] [INFO ] Deduced a trap composed of 131 places in 124 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/415 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 415/1095 variables, and 4 constraints, problems are : Problem set: 0 solved, 1204 unsolved in 30025 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/415 constraints, ReadFeed: 0/74 constraints, PredecessorRefiner: 1204/1204 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1204 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/415 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/415 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/415 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 3 (OVERLAPS) 680/1095 variables, 415/419 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1095 variables, 74/493 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1095/1095 variables, and 1697 constraints, problems are : Problem set: 0 solved, 1204 unsolved in 30773 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 415/415 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1204/1204 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62432ms problems are : Problem set: 0 solved, 1204 unsolved
Search for dead transitions found 0 dead transitions in 62434ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64497 ms. Remains : 415/415 places, 1206/1206 transitions.
[2026-05-25 11:57:16] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {228=1, 256=1, 259=1, 315=1, 512=1, 675=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 339=1, 664=1, 678=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 70 ms. (steps per millisecond=142 ) properties (out of 1) seen :[1]
Current structural bounds on expressions (after cover walk) : Max Seen:[729] Max Struct:[+inf]
[2026-05-25 11:57:17] [INFO ] Flatten gal took : 26 ms
[2026-05-25 11:57:17] [INFO ] Flatten gal took : 25 ms
[2026-05-25 11:57:17] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality2787856962945426608.gal : 4 ms
[2026-05-25 11:57:17] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality16231690533968837416.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality2787856962945426608.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality16231690533968837416.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
RANDOM walk for 40003 steps (8 resets) in 262 ms. (152 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (8 resets) in 38 ms. (1025 steps per ms) remains 1/1 properties
Loading property file /tmp/ReachabilityCardinality16231690533968837416.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 31
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :31 after 1995
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :1995 after 1.24464e+06
Interrupted probabilistic random walk after 549864 steps, run timeout after 3001 ms. (steps per millisecond=183 ) properties seen :0 out of 1
Probabilistic random walk after 549864 steps, saw 337154 distinct states, run finished after 3001 ms. (steps per millisecond=183 ) properties seen :0
[2026-05-25 11:57:20] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:57:20] [INFO ] Invariant cache hit.
[2026-05-25 11:57:20] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 8/11 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/11 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 344/355 variables, 8/11 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/355 variables, 1/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/355 variables, 1/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/355 variables, 0/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 3/358 variables, 1/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/358 variables, 1/15 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/358 variables, 0/15 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 594/952 variables, 330/345 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/952 variables, 73/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/952 variables, 0/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 15 (OVERLAPS) 62/1014 variables, 1/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/1014 variables, 0/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 67/1081 variables, 65/484 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/1081 variables, 0/484 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 8/1089 variables, 4/488 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/1089 variables, 0/488 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 6/1095 variables, 4/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (INCLUDED_ONLY) 0/1095 variables, 0/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 23 (OVERLAPS) 0/1095 variables, 0/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1095/1095 variables, and 492 constraints, problems are : Problem set: 0 solved, 1 unsolved in 313 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 415/415 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 8/11 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/11 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 344/355 variables, 8/11 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/355 variables, 1/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/355 variables, 1/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/355 variables, 1/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/355 variables, 0/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 3/358 variables, 1/15 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/358 variables, 1/16 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/358 variables, 0/16 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 594/952 variables, 330/346 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/952 variables, 73/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/952 variables, 0/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 62/1014 variables, 1/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1014 variables, 0/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 67/1081 variables, 65/485 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/1081 variables, 0/485 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 8/1089 variables, 4/489 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (INCLUDED_ONLY) 0/1089 variables, 0/489 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (OVERLAPS) 6/1095 variables, 4/493 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 23 (INCLUDED_ONLY) 0/1095 variables, 0/493 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 24 (OVERLAPS) 0/1095 variables, 0/493 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1095/1095 variables, and 493 constraints, problems are : Problem set: 0 solved, 1 unsolved in 416 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 415/415 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 737ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 1604 ms.
Support contains 1 out of 415 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 415/415 places, 1206/1206 transitions.
Applied a total of 0 rules in 43 ms. Remains 415 /415 variables (removed 0) and now considering 1206/1206 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 44 ms. Remains : 415/415 places, 1206/1206 transitions.
RANDOM walk for 40002 steps (8 resets) in 150 ms. (264 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (8 resets) in 42 ms. (930 steps per ms) remains 1/1 properties
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :1.24464e+06 after 3.74714e+10
Interrupted probabilistic random walk after 543726 steps, run timeout after 3001 ms. (steps per millisecond=181 ) properties seen :0 out of 1
Probabilistic random walk after 543726 steps, saw 333390 distinct states, run finished after 3001 ms. (steps per millisecond=181 ) properties seen :0
[2026-05-25 11:57:25] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:57:25] [INFO ] Invariant cache hit.
[2026-05-25 11:57:25] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 8/11 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/11 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 344/355 variables, 8/11 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/355 variables, 1/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/355 variables, 1/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/355 variables, 0/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 3/358 variables, 1/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/358 variables, 1/15 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/358 variables, 0/15 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 594/952 variables, 330/345 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/952 variables, 73/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/952 variables, 0/418 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 15 (OVERLAPS) 62/1014 variables, 1/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/1014 variables, 0/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 67/1081 variables, 65/484 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/1081 variables, 0/484 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 8/1089 variables, 4/488 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/1089 variables, 0/488 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 6/1095 variables, 4/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (INCLUDED_ONLY) 0/1095 variables, 0/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 23 (OVERLAPS) 0/1095 variables, 0/492 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1095/1095 variables, and 492 constraints, problems are : Problem set: 0 solved, 1 unsolved in 337 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 415/415 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 2/3 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/3 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 8/11 variables, 2/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/11 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 344/355 variables, 8/11 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/355 variables, 1/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/355 variables, 1/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/355 variables, 1/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/355 variables, 0/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 3/358 variables, 1/15 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/358 variables, 1/16 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/358 variables, 0/16 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 594/952 variables, 330/346 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/952 variables, 73/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/952 variables, 0/419 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 62/1014 variables, 1/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1014 variables, 0/420 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 67/1081 variables, 65/485 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/1081 variables, 0/485 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 8/1089 variables, 4/489 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (INCLUDED_ONLY) 0/1089 variables, 0/489 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 22 (OVERLAPS) 6/1095 variables, 4/493 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 23 (INCLUDED_ONLY) 0/1095 variables, 0/493 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 24 (OVERLAPS) 0/1095 variables, 0/493 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1095/1095 variables, and 493 constraints, problems are : Problem set: 0 solved, 1 unsolved in 439 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 415/415 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 791ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 1761 ms.
Support contains 1 out of 415 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 415/415 places, 1206/1206 transitions.
Applied a total of 0 rules in 54 ms. Remains 415 /415 variables (removed 0) and now considering 1206/1206 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 55 ms. Remains : 415/415 places, 1206/1206 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 415/415 places, 1206/1206 transitions.
Applied a total of 0 rules in 42 ms. Remains 415 /415 variables (removed 0) and now considering 1206/1206 (removed 0) transitions.
[2026-05-25 11:57:28] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:57:28] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:57:28] [INFO ] Implicit Places using invariants in 314 ms returned []
[2026-05-25 11:57:28] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:57:28] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:57:28] [INFO ] State equation strengthened by 74 read => feed constraints.
[2026-05-25 11:57:30] [INFO ] Implicit Places using invariants and state equation in 1671 ms returned []
Implicit Place search using SMT with State Equation took 1985 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:57:30] [INFO ] Redundant transitions in 27 ms returned []
Running 1204 sub problems to find dead transitions.
[2026-05-25 11:57:30] [INFO ] Flow matrix only has 680 transitions (discarded 526 similar events)
[2026-05-25 11:57:30] [INFO ] Invariant cache hit.
[2026-05-25 11:57:30] [INFO ] State equation strengthened by 74 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/415 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
SDD proceeding with computation,1 properties remain. new max is 64
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
SDD size :3.74714e+10 after 5.80647e+17
[2026-05-25 11:57:44] [INFO ] Deduced a trap composed of 131 places in 110 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/415 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
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org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 415/1095 variables, and 4 constraints, problems are : Problem set: 0 solved, 1204 unsolved in 30023 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/415 constraints, ReadFeed: 0/74 constraints, PredecessorRefiner: 1204/1204 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1204 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/415 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/415 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Detected timeout of ITS tools.
[2026-05-25 11:58:07] [INFO ] Flatten gal took : 24 ms
[2026-05-25 11:58:07] [INFO ] Applying decomposition
[2026-05-25 11:58:07] [INFO ] Flatten gal took : 23 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph8855020705934105374.txt' '-o' '/tmp/graph8855020705934105374.bin' '-w' '/tmp/graph8855020705934105374.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph8855020705934105374.bin' '-l' '-1' '-v' '-w' '/tmp/graph8855020705934105374.weights' '-q' '0' '-e' '0.001'
[2026-05-25 11:58:07] [INFO ] Decomposing Gal with order
[2026-05-25 11:58:07] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 11:58:07] [INFO ] Removed a total of 2062 redundant transitions.
[2026-05-25 11:58:07] [INFO ] Flatten gal took : 44 ms
[2026-05-25 11:58:07] [INFO ] Fuse similar labels procedure discarded/fused a total of 842 labels/synchronizations in 19 ms.
[2026-05-25 11:58:07] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality793948290030779665.gal : 4 ms
[2026-05-25 11:58:07] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality11873358350068155945.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality793948290030779665.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality11873358350068155945.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...307
Loading property file /tmp/ReachabilityCardinality11873358350068155945.prop.
At refinement iteration 2 (INCLUDED_ONLY) 0/415 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 3 (OVERLAPS) 680/1095 variables, 415/419 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1095 variables, 74/493 constraints. Problems are: Problem set: 0 solved, 1204 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1095/1095 variables, and 1697 constraints, problems are : Problem set: 0 solved, 1204 unsolved in 30907 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 415/415 constraints, ReadFeed: 74/74 constraints, PredecessorRefiner: 1204/1204 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62796ms problems are : Problem set: 0 solved, 1204 unsolved
Search for dead transitions found 0 dead transitions in 62798ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 64862 ms. Remains : 415/415 places, 1206/1206 transitions.
Attempting over-approximation, by ignoring read arcs.
Ensure Unique test removed 526 transitions
Reduce isomorphic transitions removed 526 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 10 transitions
Trivial Post-agglo rules discarded 10 transitions
Performed 10 trivial Post agglomeration. Transition count delta: 10
Iterating post reduction 0 with 536 rules applied. Total rules applied 536 place count 415 transition count 670
Reduce places removed 10 places and 0 transitions.
Iterating post reduction 1 with 10 rules applied. Total rules applied 546 place count 405 transition count 670
Performed 67 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 67 Pre rules applied. Total rules applied 546 place count 405 transition count 603
Deduced a syphon composed of 67 places in 0 ms
Reduce places removed 67 places and 0 transitions.
Iterating global reduction 2 with 134 rules applied. Total rules applied 680 place count 338 transition count 603
Performed 129 Post agglomeration using F-continuation condition.Transition count delta: 129
Deduced a syphon composed of 129 places in 1 ms
Reduce places removed 129 places and 0 transitions.
Iterating global reduction 2 with 258 rules applied. Total rules applied 938 place count 209 transition count 474
Discarding 64 places :
Symmetric choice reduction at 2 with 64 rule applications. Total rules 1002 place count 145 transition count 346
Iterating global reduction 2 with 64 rules applied. Total rules applied 1066 place count 145 transition count 346
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 1067 place count 145 transition count 345
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 1 Pre rules applied. Total rules applied 1067 place count 145 transition count 344
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 3 with 2 rules applied. Total rules applied 1069 place count 144 transition count 344
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1132 place count 81 transition count 218
Iterating global reduction 3 with 63 rules applied. Total rules applied 1195 place count 81 transition count 218
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1258 place count 18 transition count 92
Iterating global reduction 3 with 63 rules applied. Total rules applied 1321 place count 18 transition count 92
Ensure Unique test removed 63 transitions
Reduce isomorphic transitions removed 63 transitions.
Iterating post reduction 3 with 63 rules applied. Total rules applied 1384 place count 18 transition count 29
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 1 Pre rules applied. Total rules applied 1384 place count 18 transition count 28
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 1386 place count 17 transition count 28
Drop transitions (Redundant composition of simpler transitions.) removed 3 transitions
Redundant transition composition rules discarded 3 transitions
Iterating global reduction 4 with 3 rules applied. Total rules applied 1389 place count 17 transition count 25
Applied a total of 1389 rules in 21 ms. Remains 17 /415 variables (removed 398) and now considering 25/1206 (removed 1181) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 25 rows 17 cols
[2026-05-25 11:58:33] [INFO ] Computed 3 invariants in 0 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 11:58:33] [INFO ] [Real]Absence check using 3 positive place invariants in 0 ms returned sat
[2026-05-25 11:58:33] [INFO ] After 7ms SMT Verify possible using state equation in real domain returned unsat :0 sat :1
[2026-05-25 11:58:33] [INFO ] State equation strengthened by 2 read => feed constraints.
[2026-05-25 11:58:33] [INFO ] After 2ms SMT Verify possible using 2 Read/Feed constraints in real domain returned unsat :0 sat :0 real:1
[2026-05-25 11:58:33] [INFO ] After 32ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 11:58:33] [INFO ] [Nat]Absence check using 3 positive place invariants in 0 ms returned sat
[2026-05-25 11:58:33] [INFO ] After 6ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2026-05-25 11:58:33] [INFO ] After 1ms SMT Verify possible using 2 Read/Feed constraints in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-25 11:58:33] [INFO ] After 3ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-25 11:58:33] [INFO ] After 28ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
[2026-05-25 11:58:33] [INFO ] Flatten gal took : 1 ms
[2026-05-25 11:58:33] [INFO ] Flatten gal took : 0 ms
[2026-05-25 11:58:33] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality5901446908003764250.gal : 0 ms
[2026-05-25 11:58:33] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality16721077084708322838.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality5901446908003764250.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality16721077084708322838.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Loading property file /tmp/ReachabilityCardinality16721077084708322838.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :19 after 126
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :126 after 2674
SDD proceeding with computation,1 properties remain. new max is 128
SDD size :2674 after 26178
SDD proceeding with computation,1 properties remain. new max is 256
SDD size :26178 after 3.00733e+06
SDD proceeding with computation,1 properties remain. new max is 512
SDD size :3.00733e+06 after 9.15888e+06
SDD proceeding with computation,1 properties remain. new max is 1024
SDD size :9.15888e+06 after 2.14381e+07
SDD proceeding with computation,1 properties remain. new max is 2048
SDD size :2.14381e+07 after 4.59725e+07
Detected timeout of ITS tools.
[2026-05-25 11:58:48] [INFO ] Flatten gal took : 2 ms
[2026-05-25 11:58:48] [INFO ] Applying decomposition
[2026-05-25 11:58:48] [INFO ] Flatten gal took : 2 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph1727278163911947213.txt' '-o' '/tmp/graph1727278163911947213.bin' '-w' '/tmp/graph1727278163911947213.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph1727278163911947213.bin' '-l' '-1' '-v' '-w' '/tmp/graph1727278163911947213.weights' '-q' '0' '-e' '0.001'
[2026-05-25 11:58:48] [INFO ] Decomposing Gal with order
[2026-05-25 11:58:48] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 11:58:48] [INFO ] Removed a total of 14 redundant transitions.
[2026-05-25 11:58:48] [INFO ] Flatten gal took : 2 ms
[2026-05-25 11:58:48] [INFO ] Fuse similar labels procedure discarded/fused a total of 0 labels/synchronizations in 0 ms.
[2026-05-25 11:58:48] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality12029672595082945569.gal : 0 ms
[2026-05-25 11:58:48] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality898412473693978596.prop : 1 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality12029672595082945569.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality898412473693978596.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...307
Loading property file /tmp/ReachabilityCardinality898412473693978596.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :19 after 126
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :126 after 2210
SDD proceeding with computation,1 properties remain. new max is 128
SDD size :2210 after 26173
SDD proceeding with computation,1 properties remain. new max is 256
SDD size :26173 after 7.41952e+07
SDD proceeding with computation,1 properties remain. new max is 512
SDD size :7.41952e+07 after 2.95686e+09
SDD proceeding with computation,1 properties remain. new max is 1024
SDD size :2.95686e+09 after 4.16152e+10
SDD proceeding with computation,1 properties remain. new max is 2048
SDD size :4.16152e+10 after 4.26195e+11
Detected timeout of ITS tools.
Detected timeout of ITS tools.
Over-approximation ignoring read arcs solved 0 properties in 30164 ms.
Current structural bounds on expressions (After reachability solving 0 queries.) : Max Seen:[729] Max Struct:[+inf]
Ending property specific reduction for FunctionPointer-PT-c032-UpperBounds-03 in 321338 ms.
Starting property specific reduction for FunctionPointer-PT-c032-UpperBounds-05
Current structural bounds on expressions (Initially) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Adding known information on max bounds.) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Before main loop) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:59:03] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
// Phase 1: matrix 761 rows 463 cols
[2026-05-25 11:59:03] [INFO ] Computed 3 invariants in 9 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0] Max Struct:[+inf]
RANDOM walk for 10002 steps (2 resets) in 36 ms. (270 steps per ms)
BEST_FIRST walk for 10001 steps (2 resets) in 7 ms. (1250 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 11:59:03] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 11:59:03] [INFO ] Invariant cache hit.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:59:03] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:59:03] [INFO ] [Real]Absence check using state equation in 140 ms returned sat
[2026-05-25 11:59:03] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 11:59:03] [INFO ] [Real]Added 96 Read/Feed constraints in 34 ms returned sat
[2026-05-25 11:59:03] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 11:59:03] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:59:03] [INFO ] [Nat]Absence check using state equation in 138 ms returned sat
[2026-05-25 11:59:03] [INFO ] [Nat]Added 96 Read/Feed constraints in 33 ms returned sat
[2026-05-25 11:59:03] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 76 ms.
[2026-05-25 11:59:04] [INFO ] Added : 5 causal constraints over 2 iterations in 225 ms. Result :sat
Minimization took 254 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[0] Max Struct:[+inf]
Support contains 1 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Graph (complete) has 2250 edges and 463 vertex of which 460 are kept as prefixes of interest. Removing 3 places using SCC suffix rule.1 ms
Discarding 3 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 5 transitions
Reduce isomorphic transitions removed 5 transitions.
Iterating post reduction 0 with 5 rules applied. Total rules applied 6 place count 460 transition count 1310
Discarding 9 places :
Symmetric choice reduction at 1 with 9 rule applications. Total rules 15 place count 451 transition count 1290
Iterating global reduction 1 with 9 rules applied. Total rules applied 24 place count 451 transition count 1290
Ensure Unique test removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
Iterating post reduction 1 with 6 rules applied. Total rules applied 30 place count 451 transition count 1284
Discarding 6 places :
Symmetric choice reduction at 2 with 6 rule applications. Total rules 36 place count 445 transition count 1270
Iterating global reduction 2 with 6 rules applied. Total rules applied 42 place count 445 transition count 1270
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 46 place count 441 transition count 1258
Iterating global reduction 2 with 4 rules applied. Total rules applied 50 place count 441 transition count 1258
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 54 place count 437 transition count 1250
Iterating global reduction 2 with 4 rules applied. Total rules applied 58 place count 437 transition count 1250
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 62 place count 433 transition count 1242
Iterating global reduction 2 with 4 rules applied. Total rules applied 66 place count 433 transition count 1242
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 70 place count 429 transition count 1234
Iterating global reduction 2 with 4 rules applied. Total rules applied 74 place count 429 transition count 1234
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 78 place count 425 transition count 1226
Iterating global reduction 2 with 4 rules applied. Total rules applied 82 place count 425 transition count 1226
Discarding 3 places :
Symmetric choice reduction at 2 with 3 rule applications. Total rules 85 place count 422 transition count 1220
Iterating global reduction 2 with 3 rules applied. Total rules applied 88 place count 422 transition count 1220
Discarding 2 places :
Symmetric choice reduction at 2 with 2 rule applications. Total rules 90 place count 420 transition count 1216
Iterating global reduction 2 with 2 rules applied. Total rules applied 92 place count 420 transition count 1216
Applied a total of 92 rules in 116 ms. Remains 420 /463 variables (removed 43) and now considering 1216/1315 (removed 99) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 116 ms. Remains : 420/463 places, 1216/1315 transitions.
[2026-05-25 11:59:04] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {244=1, 334=1, 660=1, 685=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 342=1, 668=1, 685=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 69 ms. (steps per millisecond=144 ) properties (out of 1) seen :[2]
Current structural bounds on expressions (after cover walk) : Max Seen:[2] Max Struct:[+inf]
[2026-05-25 11:59:04] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
// Phase 1: matrix 687 rows 420 cols
[2026-05-25 11:59:04] [INFO ] Computed 3 invariants in 7 ms
Current structural bounds on expressions (after invariants) : Max Seen:[2] Max Struct:[+inf]
RANDOM walk for 1000001 steps (2 resets) in 2409 ms. (414 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 884 ms. (1129 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[524] Max Struct:[+inf]
[2026-05-25 11:59:08] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 11:59:08] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:59:08] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:59:08] [INFO ] [Real]Absence check using state equation in 129 ms returned sat
[2026-05-25 11:59:08] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:59:08] [INFO ] [Real]Added 75 Read/Feed constraints in 23 ms returned sat
[2026-05-25 11:59:08] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 11:59:08] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 11:59:08] [INFO ] [Nat]Absence check using state equation in 124 ms returned sat
[2026-05-25 11:59:08] [INFO ] [Nat]Added 75 Read/Feed constraints in 35 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:59:08] [INFO ] Deduced a trap composed of 70 places in 234 ms of which 24 ms to minimize.
[2026-05-25 11:59:08] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 293 ms
[2026-05-25 11:59:08] [INFO ] Computed and/alt/rep : 332/1248/332 causal constraints (skipped 353 transitions) in 64 ms.
[2026-05-25 11:59:09] [INFO ] Added : 9 causal constraints over 3 iterations in 207 ms. Result :sat
Minimization took 225 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[524] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[524] Max Struct:[+inf]
Support contains 1 out of 420 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 420/420 places, 1216/1216 transitions.
Applied a total of 0 rules in 56 ms. Remains 420 /420 variables (removed 0) and now considering 1216/1216 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 56 ms. Remains : 420/420 places, 1216/1216 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 420/420 places, 1216/1216 transitions.
Applied a total of 0 rules in 46 ms. Remains 420 /420 variables (removed 0) and now considering 1216/1216 (removed 0) transitions.
[2026-05-25 11:59:11] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 11:59:11] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:59:11] [INFO ] Implicit Places using invariants in 285 ms returned []
[2026-05-25 11:59:11] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 11:59:11] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 11:59:11] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 11:59:14] [INFO ] Implicit Places using invariants and state equation in 2233 ms returned []
Implicit Place search using SMT with State Equation took 2519 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 11:59:14] [INFO ] Redundant transitions in 26 ms returned []
Running 1214 sub problems to find dead transitions.
[2026-05-25 11:59:14] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 11:59:14] [INFO ] Invariant cache hit.
[2026-05-25 11:59:14] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/420 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 11:59:24] [INFO ] Deduced a trap composed of 131 places in 123 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/420 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 420/1107 variables, and 4 constraints, problems are : Problem set: 0 solved, 1214 unsolved in 30021 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/420 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1214/1214 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1214 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/420 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/420 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/420 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 3 (OVERLAPS) 687/1107 variables, 420/424 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1107 variables, 75/499 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1107/1107 variables, and 1713 constraints, problems are : Problem set: 0 solved, 1214 unsolved in 30746 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 420/420 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1214/1214 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62441ms problems are : Problem set: 0 solved, 1214 unsolved
Search for dead transitions found 0 dead transitions in 62443ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65043 ms. Remains : 420/420 places, 1216/1216 transitions.
[2026-05-25 12:00:16] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {244=1, 334=1, 660=1, 685=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 342=1, 668=1, 685=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 68 ms. (steps per millisecond=147 ) properties (out of 1) seen :[2]
Current structural bounds on expressions (after cover walk) : Max Seen:[524] Max Struct:[+inf]
[2026-05-25 12:00:16] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:00:16] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[524] Max Struct:[+inf]
RANDOM walk for 1000001 steps (2 resets) in 2533 ms. (394 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 914 ms. (1092 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[534] Max Struct:[+inf]
[2026-05-25 12:00:20] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:00:20] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 12:00:20] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 12:00:20] [INFO ] [Real]Absence check using state equation in 127 ms returned sat
[2026-05-25 12:00:20] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 12:00:20] [INFO ] [Real]Added 75 Read/Feed constraints in 25 ms returned sat
[2026-05-25 12:00:20] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 12:00:20] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 12:00:20] [INFO ] [Nat]Absence check using state equation in 129 ms returned sat
[2026-05-25 12:00:20] [INFO ] [Nat]Added 75 Read/Feed constraints in 35 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 12:00:20] [INFO ] Deduced a trap composed of 70 places in 211 ms of which 23 ms to minimize.
[2026-05-25 12:00:20] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 271 ms
[2026-05-25 12:00:21] [INFO ] Computed and/alt/rep : 332/1248/332 causal constraints (skipped 353 transitions) in 78 ms.
[2026-05-25 12:00:21] [INFO ] Added : 9 causal constraints over 3 iterations in 290 ms. Result :sat
Minimization took 250 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[534] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[534] Max Struct:[+inf]
Support contains 1 out of 420 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 420/420 places, 1216/1216 transitions.
Applied a total of 0 rules in 50 ms. Remains 420 /420 variables (removed 0) and now considering 1216/1216 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 50 ms. Remains : 420/420 places, 1216/1216 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 420/420 places, 1216/1216 transitions.
Applied a total of 0 rules in 52 ms. Remains 420 /420 variables (removed 0) and now considering 1216/1216 (removed 0) transitions.
[2026-05-25 12:00:23] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:00:23] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 12:00:24] [INFO ] Implicit Places using invariants in 289 ms returned []
[2026-05-25 12:00:24] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:00:24] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 12:00:24] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 12:00:26] [INFO ] Implicit Places using invariants and state equation in 2182 ms returned []
Implicit Place search using SMT with State Equation took 2472 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 12:00:26] [INFO ] Redundant transitions in 28 ms returned []
Running 1214 sub problems to find dead transitions.
[2026-05-25 12:00:26] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:00:26] [INFO ] Invariant cache hit.
[2026-05-25 12:00:26] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/420 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 12:00:37] [INFO ] Deduced a trap composed of 131 places in 114 ms of which 4 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/420 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Error getting values : (error "Error writing to Z3 solver: java.io.IOException: Broken pipe")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 420/1107 variables, and 4 constraints, problems are : Problem set: 0 solved, 1214 unsolved in 30024 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/420 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1214/1214 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1214 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/420 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/420 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/420 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 3 (OVERLAPS) 687/1107 variables, 420/424 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1107 variables, 75/499 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1107/1107 variables, and 1713 constraints, problems are : Problem set: 0 solved, 1214 unsolved in 30758 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 420/420 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1214/1214 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62496ms problems are : Problem set: 0 solved, 1214 unsolved
Search for dead transitions found 0 dead transitions in 62498ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65057 ms. Remains : 420/420 places, 1216/1216 transitions.
[2026-05-25 12:01:28] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {244=1, 334=1, 660=1, 685=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 342=1, 668=1, 685=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 65 ms. (steps per millisecond=153 ) properties (out of 1) seen :[2]
Current structural bounds on expressions (after cover walk) : Max Seen:[534] Max Struct:[+inf]
[2026-05-25 12:01:29] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:01:29] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[534] Max Struct:[+inf]
RANDOM walk for 1000001 steps (2 resets) in 2449 ms. (408 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 909 ms. (1098 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[534] Max Struct:[+inf]
[2026-05-25 12:01:32] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:01:32] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 12:01:32] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 12:01:32] [INFO ] [Real]Absence check using state equation in 132 ms returned sat
[2026-05-25 12:01:32] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 12:01:32] [INFO ] [Real]Added 75 Read/Feed constraints in 23 ms returned sat
[2026-05-25 12:01:32] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 12:01:32] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 12:01:32] [INFO ] [Nat]Absence check using state equation in 121 ms returned sat
[2026-05-25 12:01:32] [INFO ] [Nat]Added 75 Read/Feed constraints in 35 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 12:01:33] [INFO ] Deduced a trap composed of 70 places in 219 ms of which 23 ms to minimize.
[2026-05-25 12:01:33] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 276 ms
[2026-05-25 12:01:33] [INFO ] Computed and/alt/rep : 332/1248/332 causal constraints (skipped 353 transitions) in 76 ms.
[2026-05-25 12:01:33] [INFO ] Added : 9 causal constraints over 3 iterations in 226 ms. Result :sat
Minimization took 228 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[534] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[534] Max Struct:[+inf]
Support contains 1 out of 420 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 420/420 places, 1216/1216 transitions.
Applied a total of 0 rules in 49 ms. Remains 420 /420 variables (removed 0) and now considering 1216/1216 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 50 ms. Remains : 420/420 places, 1216/1216 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 420/420 places, 1216/1216 transitions.
Applied a total of 0 rules in 50 ms. Remains 420 /420 variables (removed 0) and now considering 1216/1216 (removed 0) transitions.
[2026-05-25 12:01:36] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:01:36] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 12:01:36] [INFO ] Implicit Places using invariants in 284 ms returned []
[2026-05-25 12:01:36] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:01:36] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 12:01:36] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 12:01:38] [INFO ] Implicit Places using invariants and state equation in 2127 ms returned []
Implicit Place search using SMT with State Equation took 2413 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 12:01:38] [INFO ] Redundant transitions in 29 ms returned []
Running 1214 sub problems to find dead transitions.
[2026-05-25 12:01:38] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:01:38] [INFO ] Invariant cache hit.
[2026-05-25 12:01:38] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/420 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 12:01:49] [INFO ] Deduced a trap composed of 131 places in 117 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/420 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 420/1107 variables, and 4 constraints, problems are : Problem set: 0 solved, 1214 unsolved in 30019 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/420 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1214/1214 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1214 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/420 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/420 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/420 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 3 (OVERLAPS) 687/1107 variables, 420/424 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1107 variables, 75/499 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1107/1107 variables, and 1713 constraints, problems are : Problem set: 0 solved, 1214 unsolved in 30786 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 420/420 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1214/1214 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62512ms problems are : Problem set: 0 solved, 1214 unsolved
Search for dead transitions found 0 dead transitions in 62513ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65018 ms. Remains : 420/420 places, 1216/1216 transitions.
[2026-05-25 12:02:41] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {244=1, 334=1, 660=1, 685=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {252=1, 342=1, 668=1, 685=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 72 ms. (steps per millisecond=138 ) properties (out of 1) seen :[2]
Current structural bounds on expressions (after cover walk) : Max Seen:[534] Max Struct:[+inf]
[2026-05-25 12:02:41] [INFO ] Flatten gal took : 29 ms
[2026-05-25 12:02:41] [INFO ] Flatten gal took : 25 ms
RANDOM walk for 40002 steps (8 resets) in 218 ms. (182 steps per ms) remains 1/1 properties
[2026-05-25 12:02:41] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality6778907074400119213.gal : 4 ms
[2026-05-25 12:02:41] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality10372142507892948900.prop : 1 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality6778907074400119213.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality10372142507892948900.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
BEST_FIRST walk for 40004 steps (8 resets) in 53 ms. (740 steps per ms) remains 1/1 properties
Loading property file /tmp/ReachabilityCardinality10372142507892948900.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 31
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :31 after 1995
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :1995 after 1.24464e+06
Interrupted probabilistic random walk after 517524 steps, run timeout after 3001 ms. (steps per millisecond=172 ) properties seen :0 out of 1
Probabilistic random walk after 517524 steps, saw 317327 distinct states, run finished after 3001 ms. (steps per millisecond=172 ) properties seen :0
[2026-05-25 12:02:44] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:02:44] [INFO ] Invariant cache hit.
[2026-05-25 12:02:44] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 3/4 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/4 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 9/13 variables, 3/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/13 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 352/365 variables, 8/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/365 variables, 1/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/365 variables, 0/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 7/372 variables, 2/15 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/372 variables, 3/18 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/372 variables, 0/18 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 605/977 variables, 337/355 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/977 variables, 74/429 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/977 variables, 0/429 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 62/1039 variables, 1/430 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/1039 variables, 0/430 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 68/1107 variables, 68/498 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1107 variables, 0/498 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 0/1107 variables, 0/498 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1107/1107 variables, and 498 constraints, problems are : Problem set: 0 solved, 1 unsolved in 258 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 420/420 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 3/4 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/4 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 9/13 variables, 3/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/13 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 352/365 variables, 8/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/365 variables, 1/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/365 variables, 1/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/365 variables, 0/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 7/372 variables, 2/16 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/372 variables, 3/19 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/372 variables, 0/19 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 605/977 variables, 337/356 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/977 variables, 74/430 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/977 variables, 0/430 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 62/1039 variables, 1/431 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/1039 variables, 0/431 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 68/1107 variables, 68/499 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/1107 variables, 0/499 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/1107 variables, 0/499 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1107/1107 variables, and 499 constraints, problems are : Problem set: 0 solved, 1 unsolved in 361 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 420/420 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 646ms problems are : Problem set: 0 solved, 1 unsolved
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :1.24464e+06 after 3.74714e+10
Parikh walk visited 0 properties in 2599 ms.
Support contains 1 out of 420 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 420/420 places, 1216/1216 transitions.
Applied a total of 0 rules in 46 ms. Remains 420 /420 variables (removed 0) and now considering 1216/1216 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 47 ms. Remains : 420/420 places, 1216/1216 transitions.
RANDOM walk for 40004 steps (8 resets) in 173 ms. (229 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (8 resets) in 32 ms. (1212 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 496305 steps, run timeout after 3001 ms. (steps per millisecond=165 ) properties seen :0 out of 1
Probabilistic random walk after 496305 steps, saw 304321 distinct states, run finished after 3001 ms. (steps per millisecond=165 ) properties seen :0
[2026-05-25 12:02:50] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:02:50] [INFO ] Invariant cache hit.
[2026-05-25 12:02:50] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 3/4 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/4 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 9/13 variables, 3/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/13 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 352/365 variables, 8/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/365 variables, 1/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/365 variables, 0/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 7/372 variables, 2/15 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/372 variables, 3/18 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/372 variables, 0/18 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 605/977 variables, 337/355 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/977 variables, 74/429 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/977 variables, 0/429 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 62/1039 variables, 1/430 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/1039 variables, 0/430 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 68/1107 variables, 68/498 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/1107 variables, 0/498 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 0/1107 variables, 0/498 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 1107/1107 variables, and 498 constraints, problems are : Problem set: 0 solved, 1 unsolved in 249 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 420/420 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/1 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 1 (OVERLAPS) 3/4 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/4 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 9/13 variables, 3/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/13 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 352/365 variables, 8/12 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/365 variables, 1/13 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/365 variables, 1/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/365 variables, 0/14 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 7/372 variables, 2/16 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/372 variables, 3/19 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/372 variables, 0/19 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 605/977 variables, 337/356 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/977 variables, 74/430 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/977 variables, 0/430 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 62/1039 variables, 1/431 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/1039 variables, 0/431 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 68/1107 variables, 68/499 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/1107 variables, 0/499 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/1107 variables, 0/499 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 1107/1107 variables, and 499 constraints, problems are : Problem set: 0 solved, 1 unsolved in 336 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 420/420 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 610ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 2837 ms.
Support contains 1 out of 420 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 420/420 places, 1216/1216 transitions.
Applied a total of 0 rules in 54 ms. Remains 420 /420 variables (removed 0) and now considering 1216/1216 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 55 ms. Remains : 420/420 places, 1216/1216 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 420/420 places, 1216/1216 transitions.
Applied a total of 0 rules in 61 ms. Remains 420 /420 variables (removed 0) and now considering 1216/1216 (removed 0) transitions.
[2026-05-25 12:02:54] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:02:54] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 12:02:54] [INFO ] Implicit Places using invariants in 285 ms returned []
[2026-05-25 12:02:54] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:02:54] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 12:02:54] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 12:02:56] [INFO ] Implicit Places using invariants and state equation in 2143 ms returned []
Implicit Place search using SMT with State Equation took 2429 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 12:02:56] [INFO ] Redundant transitions in 21 ms returned []
Running 1214 sub problems to find dead transitions.
[2026-05-25 12:02:56] [INFO ] Flow matrix only has 687 transitions (discarded 529 similar events)
[2026-05-25 12:02:56] [INFO ] Invariant cache hit.
[2026-05-25 12:02:56] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/420 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :3.74714e+10 after 5.80647e+17
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 12:03:09] [INFO ] Deduced a trap composed of 131 places in 118 ms of which 5 ms to minimize.
At refinement iteration 1 (INCLUDED_ONLY) 0/420 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 420/1107 variables, and 4 constraints, problems are : Problem set: 0 solved, 1214 unsolved in 30020 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 0/420 constraints, ReadFeed: 0/75 constraints, PredecessorRefiner: 1214/1214 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1214 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/420 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/420 variables, 1/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Detected timeout of ITS tools.
[2026-05-25 12:03:31] [INFO ] Flatten gal took : 23 ms
[2026-05-25 12:03:31] [INFO ] Applying decomposition
[2026-05-25 12:03:31] [INFO ] Flatten gal took : 23 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph5406029480956319407.txt' '-o' '/tmp/graph5406029480956319407.bin' '-w' '/tmp/graph5406029480956319407.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph5406029480956319407.bin' '-l' '-1' '-v' '-w' '/tmp/graph5406029480956319407.weights' '-q' '0' '-e' '0.001'
[2026-05-25 12:03:31] [INFO ] Decomposing Gal with order
[2026-05-25 12:03:31] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 12:03:31] [INFO ] Removed a total of 2077 redundant transitions.
[2026-05-25 12:03:31] [INFO ] Flatten gal took : 44 ms
[2026-05-25 12:03:31] [INFO ] Fuse similar labels procedure discarded/fused a total of 884 labels/synchronizations in 20 ms.
[2026-05-25 12:03:31] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality695887533050453007.gal : 5 ms
[2026-05-25 12:03:31] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality11910311651944209842.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality695887533050453007.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality11910311651944209842.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...307
Loading property file /tmp/ReachabilityCardinality11910311651944209842.prop.
At refinement iteration 2 (INCLUDED_ONLY) 0/420 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 3 (OVERLAPS) 687/1107 variables, 420/424 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1107 variables, 75/499 constraints. Problems are: Problem set: 0 solved, 1214 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1107/1107 variables, and 1713 constraints, problems are : Problem set: 0 solved, 1214 unsolved in 30901 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 420/420 constraints, ReadFeed: 75/75 constraints, PredecessorRefiner: 1214/1214 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 62917ms problems are : Problem set: 0 solved, 1214 unsolved
Search for dead transitions found 0 dead transitions in 62919ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 65441 ms. Remains : 420/420 places, 1216/1216 transitions.
Attempting over-approximation, by ignoring read arcs.
Ensure Unique test removed 529 transitions
Reduce isomorphic transitions removed 529 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 10 transitions
Trivial Post-agglo rules discarded 10 transitions
Performed 10 trivial Post agglomeration. Transition count delta: 10
Iterating post reduction 0 with 539 rules applied. Total rules applied 539 place count 420 transition count 677
Reduce places removed 10 places and 0 transitions.
Iterating post reduction 1 with 10 rules applied. Total rules applied 549 place count 410 transition count 677
Performed 72 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 72 Pre rules applied. Total rules applied 549 place count 410 transition count 605
Deduced a syphon composed of 72 places in 0 ms
Reduce places removed 72 places and 0 transitions.
Iterating global reduction 2 with 144 rules applied. Total rules applied 693 place count 338 transition count 605
Performed 127 Post agglomeration using F-continuation condition.Transition count delta: 127
Deduced a syphon composed of 127 places in 0 ms
Reduce places removed 127 places and 0 transitions.
Iterating global reduction 2 with 254 rules applied. Total rules applied 947 place count 211 transition count 478
Discarding 64 places :
Symmetric choice reduction at 2 with 64 rule applications. Total rules 1011 place count 147 transition count 350
Iterating global reduction 2 with 64 rules applied. Total rules applied 1075 place count 147 transition count 350
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 2 with 2 rules applied. Total rules applied 1077 place count 147 transition count 348
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1140 place count 84 transition count 222
Iterating global reduction 3 with 63 rules applied. Total rules applied 1203 place count 84 transition count 222
Discarding 63 places :
Symmetric choice reduction at 3 with 63 rule applications. Total rules 1266 place count 21 transition count 96
Iterating global reduction 3 with 63 rules applied. Total rules applied 1329 place count 21 transition count 96
Ensure Unique test removed 63 transitions
Reduce isomorphic transitions removed 63 transitions.
Iterating post reduction 3 with 63 rules applied. Total rules applied 1392 place count 21 transition count 33
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 1 Pre rules applied. Total rules applied 1392 place count 21 transition count 32
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 1394 place count 20 transition count 32
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 1396 place count 19 transition count 31
Applied a total of 1396 rules in 17 ms. Remains 19 /420 variables (removed 401) and now considering 31/1216 (removed 1185) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 31 rows 19 cols
[2026-05-25 12:03:59] [INFO ] Computed 3 invariants in 0 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 12:03:59] [INFO ] [Real]Absence check using 3 positive place invariants in 0 ms returned sat
[2026-05-25 12:03:59] [INFO ] After 7ms SMT Verify possible using state equation in real domain returned unsat :0 sat :1
[2026-05-25 12:03:59] [INFO ] State equation strengthened by 2 read => feed constraints.
[2026-05-25 12:03:59] [INFO ] After 2ms SMT Verify possible using 2 Read/Feed constraints in real domain returned unsat :0 sat :0 real:1
[2026-05-25 12:03:59] [INFO ] After 30ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:1
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-25 12:03:59] [INFO ] [Nat]Absence check using 3 positive place invariants in 0 ms returned sat
[2026-05-25 12:03:59] [INFO ] After 7ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
[2026-05-25 12:03:59] [INFO ] After 1ms SMT Verify possible using 2 Read/Feed constraints in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-25 12:03:59] [INFO ] After 3ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-25 12:03:59] [INFO ] After 27ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
[2026-05-25 12:03:59] [INFO ] Flatten gal took : 1 ms
[2026-05-25 12:03:59] [INFO ] Flatten gal took : 2 ms
[2026-05-25 12:03:59] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality479999951325948570.gal : 1 ms
[2026-05-25 12:03:59] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality2323438796986828200.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality479999951325948570.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality2323438796986828200.prop' '--nowitness' '--gen-order' 'FOLLOW'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...327
Loading property file /tmp/ReachabilityCardinality2323438796986828200.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :19 after 126
SDD proceeding with computation,1 properties remain. new max is 64
SDD size :126 after 6339
SDD proceeding with computation,1 properties remain. new max is 128
SDD size :6339 after 426547
SDD proceeding with computation,1 properties remain. new max is 256
SDD size :426547 after 1.19848e+06
SDD proceeding with computation,1 properties remain. new max is 512
SDD size :1.19848e+06 after 2.73637e+06
SDD proceeding with computation,1 properties remain. new max is 1024
SDD size :2.73637e+06 after 5.80616e+06
SDD proceeding with computation,1 properties remain. new max is 2048
SDD size :5.80616e+06 after 1.19398e+07
SDD proceeding with computation,1 properties remain. new max is 4096
SDD size :1.19398e+07 after 2.4201e+07
Detected timeout of ITS tools.
[2026-05-25 12:04:14] [INFO ] Flatten gal took : 2 ms
[2026-05-25 12:04:14] [INFO ] Applying decomposition
[2026-05-25 12:04:14] [INFO ] Flatten gal took : 1 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/convert-linux64' '-i' '/tmp/graph5552455033900057448.txt' '-o' '/tmp/graph5552455033900057448.bin' '-w' '/tmp/graph5552455033900057448.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph5552455033900057448.bin' '-l' '-1' '-v' '-w' '/tmp/graph5552455033900057448.weights' '-q' '0' '-e' '0.001'
[2026-05-25 12:04:14] [INFO ] Decomposing Gal with order
[2026-05-25 12:04:14] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-25 12:04:14] [INFO ] Removed a total of 30 redundant transitions.
[2026-05-25 12:04:14] [INFO ] Flatten gal took : 2 ms
[2026-05-25 12:04:14] [INFO ] Fuse similar labels procedure discarded/fused a total of 2 labels/synchronizations in 1 ms.
[2026-05-25 12:04:14] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality6156030623125960516.gal : 0 ms
[2026-05-25 12:04:14] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality17790737688085944078.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality6156030623125960516.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality17790737688085944078.prop' '--nowitness'
its-reach command run as :
/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...308
Loading property file /tmp/ReachabilityCardinality17790737688085944078.prop.
SDD proceeding with computation,1 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,1 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,1 properties remain. new max is 16
SDD size :10 after 19
SDD proceeding with computation,1 properties remain. new max is 32
SDD size :19 after 126
Detected timeout of ITS tools.
Detected timeout of ITS tools.
Over-approximation ignoring read arcs solved 0 properties in 30150 ms.
Current structural bounds on expressions (After reachability solving 0 queries.) : Max Seen:[534] Max Struct:[+inf]
Ending property specific reduction for FunctionPointer-PT-c032-UpperBounds-05 in 326572 ms.
Starting property specific reduction for FunctionPointer-PT-c032-UpperBounds-06
Current structural bounds on expressions (Initially) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Adding known information on max bounds.) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (Before main loop) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 12:04:29] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
// Phase 1: matrix 761 rows 463 cols
[2026-05-25 12:04:29] [INFO ] Computed 3 invariants in 9 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0] Max Struct:[+inf]
RANDOM walk for 10000 steps (2 resets) in 27 ms. (357 steps per ms)
BEST_FIRST walk for 10001 steps (2 resets) in 7 ms. (1250 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[0] Max Struct:[+inf]
[2026-05-25 12:04:29] [INFO ] Flow matrix only has 761 transitions (discarded 554 similar events)
[2026-05-25 12:04:29] [INFO ] Invariant cache hit.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 12:04:29] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 12:04:30] [INFO ] [Real]Absence check using state equation in 136 ms returned sat
[2026-05-25 12:04:30] [INFO ] State equation strengthened by 96 read => feed constraints.
[2026-05-25 12:04:30] [INFO ] [Real]Added 96 Read/Feed constraints in 38 ms returned sat
[2026-05-25 12:04:30] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 12:04:30] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 12:04:30] [INFO ] [Nat]Absence check using state equation in 131 ms returned sat
[2026-05-25 12:04:30] [INFO ] [Nat]Added 96 Read/Feed constraints in 31 ms returned sat
[2026-05-25 12:04:30] [INFO ] Computed and/alt/rep : 96/200/96 causal constraints (skipped 663 transitions) in 81 ms.
[2026-05-25 12:04:30] [INFO ] Added : 5 causal constraints over 2 iterations in 229 ms. Result :sat
Minimization took 244 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[0] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[0] Max Struct:[+inf]
Support contains 1 out of 463 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 463/463 places, 1315/1315 transitions.
Graph (complete) has 2250 edges and 463 vertex of which 460 are kept as prefixes of interest. Removing 3 places using SCC suffix rule.0 ms
Discarding 3 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 5 transitions
Reduce isomorphic transitions removed 5 transitions.
Iterating post reduction 0 with 5 rules applied. Total rules applied 6 place count 460 transition count 1310
Discarding 10 places :
Symmetric choice reduction at 1 with 10 rule applications. Total rules 16 place count 450 transition count 1286
Iterating global reduction 1 with 10 rules applied. Total rules applied 26 place count 450 transition count 1286
Ensure Unique test removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
Iterating post reduction 1 with 6 rules applied. Total rules applied 32 place count 450 transition count 1280
Discarding 6 places :
Symmetric choice reduction at 2 with 6 rule applications. Total rules 38 place count 444 transition count 1266
Iterating global reduction 2 with 6 rules applied. Total rules applied 44 place count 444 transition count 1266
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 48 place count 440 transition count 1256
Iterating global reduction 2 with 4 rules applied. Total rules applied 52 place count 440 transition count 1256
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 56 place count 436 transition count 1248
Iterating global reduction 2 with 4 rules applied. Total rules applied 60 place count 436 transition count 1248
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 64 place count 432 transition count 1240
Iterating global reduction 2 with 4 rules applied. Total rules applied 68 place count 432 transition count 1240
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 72 place count 428 transition count 1232
Iterating global reduction 2 with 4 rules applied. Total rules applied 76 place count 428 transition count 1232
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 80 place count 424 transition count 1224
Iterating global reduction 2 with 4 rules applied. Total rules applied 84 place count 424 transition count 1224
Discarding 2 places :
Symmetric choice reduction at 2 with 2 rule applications. Total rules 86 place count 422 transition count 1220
Iterating global reduction 2 with 2 rules applied. Total rules applied 88 place count 422 transition count 1220
Discarding 1 places :
Symmetric choice reduction at 2 with 1 rule applications. Total rules 89 place count 421 transition count 1218
Iterating global reduction 2 with 1 rules applied. Total rules applied 90 place count 421 transition count 1218
Applied a total of 90 rules in 115 ms. Remains 421 /463 variables (removed 42) and now considering 1218/1315 (removed 97) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 115 ms. Remains : 421/463 places, 1218/1315 transitions.
[2026-05-25 12:04:31] [INFO ] Flow matrix only has 688 transitions (discarded 530 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {216=1, 307=1, 633=1, 686=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {252=1, 343=1, 541=1, 684=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 69 ms. (steps per millisecond=144 ) properties (out of 1) seen :[2]
Current structural bounds on expressions (after cover walk) : Max Seen:[2] Max Struct:[+inf]
[2026-05-25 12:04:31] [INFO ] Flow matrix only has 688 transitions (discarded 530 similar events)
// Phase 1: matrix 688 rows 421 cols
[2026-05-25 12:04:31] [INFO ] Computed 3 invariants in 8 ms
Current structural bounds on expressions (after invariants) : Max Seen:[2] Max Struct:[+inf]
RANDOM walk for 1000000 steps (2 resets) in 2463 ms. (405 steps per ms)
BEST_FIRST walk for 1000001 steps (2 resets) in 907 ms. (1101 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[490] Max Struct:[+inf]
[2026-05-25 12:04:34] [INFO ] Flow matrix only has 688 transitions (discarded 530 similar events)
[2026-05-25 12:04:34] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 12:04:34] [INFO ] [Real]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 12:04:34] [INFO ] [Real]Absence check using state equation in 133 ms returned sat
[2026-05-25 12:04:34] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 12:04:34] [INFO ] [Real]Added 75 Read/Feed constraints in 40 ms returned sat
[2026-05-25 12:04:34] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 12:04:35] [INFO ] [Nat]Absence check using 3 positive place invariants in 4 ms returned sat
[2026-05-25 12:04:35] [INFO ] [Nat]Absence check using state equation in 119 ms returned sat
[2026-05-25 12:04:35] [INFO ] [Nat]Added 75 Read/Feed constraints in 27 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 12:04:35] [INFO ] Deduced a trap composed of 70 places in 215 ms of which 23 ms to minimize.
[2026-05-25 12:04:35] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 264 ms
[2026-05-25 12:04:35] [INFO ] Computed and/alt/rep : 332/1248/332 causal constraints (skipped 354 transitions) in 73 ms.
[2026-05-25 12:04:35] [INFO ] Added : 10 causal constraints over 3 iterations in 260 ms. Result :sat
Minimization took 216 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[490] Max Struct:[+inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[490] Max Struct:[+inf]
Support contains 1 out of 421 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 421/421 places, 1218/1218 transitions.
Applied a total of 0 rules in 44 ms. Remains 421 /421 variables (removed 0) and now considering 1218/1218 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 44 ms. Remains : 421/421 places, 1218/1218 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 421/421 places, 1218/1218 transitions.
Applied a total of 0 rules in 44 ms. Remains 421 /421 variables (removed 0) and now considering 1218/1218 (removed 0) transitions.
[2026-05-25 12:04:36] [INFO ] Flow matrix only has 688 transitions (discarded 530 similar events)
[2026-05-25 12:04:36] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 12:04:36] [INFO ] Implicit Places using invariants in 296 ms returned []
[2026-05-25 12:04:36] [INFO ] Flow matrix only has 688 transitions (discarded 530 similar events)
[2026-05-25 12:04:36] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 12:04:36] [INFO ] State equation strengthened by 75 read => feed constraints.
[2026-05-25 12:04:38] [INFO ] Implicit Places using invariants and state equation in 1864 ms returned []
Implicit Place search using SMT with State Equation took 2161 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 12:04:38] [INFO ] Redundant transitions in 26 ms returned []
Running 1216 sub problems to find dead transitions.
[2026-05-25 12:04:38] [INFO ] Flow matrix only has 688 transitions (discarded 530 similar events)
[2026-05-25 12:04:38] [INFO ] Invariant cache hit.
[2026-05-25 12:04:38] [INFO ] State equation strengthened by 75 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
BK_TIME_CONFINEMENT_REACHED
--------------------
content from stderr:
+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ UpperBounds = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution UpperBounds -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202505121319.jar
++ perl -pe 's/.*\.//g'
+ VERSION=202505121319
+ echo 'Running Version 202505121319'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination UpperBounds -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
Sequence of Actions to be Executed by the VM
This is useful if one wants to reexecute the tool in the VM from the submitted image disk.
set -x
# this is for BenchKit: configuration of major elements for the test
export BK_INPUT="FunctionPointer-PT-c032"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="gold2025"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"
# this is specific to your benchmark or test
export BIN_DIR="$HOME/BenchKit/bin"
# remove the execution directoty if it exists (to avoid increse of .vmdk images)
if [ -d execution ] ; then
rm -rf execution
fi
# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-5973"
echo " Executing tool gold2025"
echo " Input is FunctionPointer-PT-c032, examination is UpperBounds"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r159-tall-177961079800019"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/FunctionPointer-PT-c032.tgz
mv FunctionPointer-PT-c032 execution
cd execution
if [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "UpperBounds" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] || [ "UpperBounds" = "StateSpace" ]; then
rm -f GenericPropertiesVerdict.xml
fi
pwd
ls -lh
echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "UpperBounds" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "UpperBounds" != "StateSpace" ] ; then
echo "The expected result is a vector of booleans"
echo BOOL_VECTOR
else
echo "no data necessary for post analysis"
fi
echo
if [ -f "UpperBounds.xml" ] ; then # for cunf (txt files deleted;-)
echo echo "here is the order used to build the result vector(from xml file)"
for x in $(grep '
echo "FORMULA_NAME $x"
done
elif [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] ; then
echo "FORMULA_NAME UpperBounds"
fi
echo
echo "=== Now, execution of the tool begins"
echo
echo -n "BK_START "
date -u +%s%3N
echo
timeout -s 9 $BK_TIME_CONFINEMENT bash -c "/home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n \"BK_STOP \" ; date -u +%s%3N"
if [ $? -eq 137 ] ; then
echo
echo "BK_TIME_CONFINEMENT_REACHED"
fi
echo
echo "--------------------"
echo "content from stderr:"
echo
cat STDERR ;