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.r096-smll-177946996500232.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 DES-PT-10b, examination is QuasiLiveness
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r096-smll-177946996500232
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 564K
-rw-r--r-- 1 mcc users 6.1K Mar 6 18:26 CTLCardinality.txt
-rw-r--r-- 1 mcc users 66K Mar 6 18:26 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.8K Mar 6 18:26 CTLFireability.txt
-rw-r--r-- 1 mcc users 68K Mar 6 18:26 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Mar 3 18:30 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.2K Mar 15 08:56 LTLCardinality.txt
-rw-r--r-- 1 mcc users 22K Mar 15 08:56 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K Mar 15 08:57 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Mar 15 08:57 LTLFireability.xml
-rw-r--r-- 1 mcc users 15K Mar 6 18:26 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 162K Mar 6 18:26 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.4K Mar 6 18:26 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 64K Mar 6 18:26 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.5K Mar 15 08:57 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.5K Mar 15 08:57 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 equiv_col
-rw-r--r-- 1 mcc users 4 Mar 3 18:30 instance
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 iscolored
-rw-r--r-- 1 mcc users 79K 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 booleans
BOOL_VECTOR

FORMULA_NAME QuasiLiveness

=== Now, execution of the tool begins

BK_START 1779533128994

Invoking MCC driver with
GOLD_TOOL=
BK_EXAMINATION=QuasiLiveness
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=DES-PT-10b
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
QuasiLiveness PT
Running Version 202505121319
[2026-05-23 10:45:30] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, QuasiLiveness, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 1800]
[2026-05-23 10:45:30] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2026-05-23 10:45:31] [INFO ] Load time of PNML (sax parser for PT used): 124 ms
[2026-05-23 10:45:31] [INFO ] Transformed 320 places.
[2026-05-23 10:45:31] [INFO ] Transformed 271 transitions.
[2026-05-23 10:45:31] [INFO ] Found NUPN structural information;
[2026-05-23 10:45:31] [INFO ] Parsed PT model containing 320 places and 271 transitions and 827 arcs in 280 ms.
Starting structural reductions in LIVENESS mode, iteration 0 : 320/320 places, 271/271 transitions.
Reduce places removed 3 places and 0 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 23 transitions
Trivial Post-agglo rules discarded 23 transitions
Performed 23 trivial Post agglomeration. Transition count delta: 23
Iterating post reduction 0 with 26 rules applied. Total rules applied 26 place count 317 transition count 248
Reduce places removed 23 places and 0 transitions.
Iterating post reduction 1 with 23 rules applied. Total rules applied 49 place count 294 transition count 248
Performed 9 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 9 Pre rules applied. Total rules applied 49 place count 294 transition count 239
Deduced a syphon composed of 9 places in 3 ms
Reduce places removed 9 places and 0 transitions.
Iterating global reduction 2 with 18 rules applied. Total rules applied 67 place count 285 transition count 239
Performed 91 Post agglomeration using F-continuation condition.Transition count delta: 91
Deduced a syphon composed of 91 places in 0 ms
Reduce places removed 91 places and 0 transitions.
Iterating global reduction 2 with 182 rules applied. Total rules applied 249 place count 194 transition count 148
Performed 4 Post agglomeration using F-continuation condition.Transition count delta: -16
Deduced a syphon composed of 4 places in 0 ms
Reduce places removed 4 places and 0 transitions.
Iterating global reduction 2 with 8 rules applied. Total rules applied 257 place count 190 transition count 164
Applied a total of 257 rules in 110 ms. Remains 190 /320 variables (removed 130) and now considering 164/271 (removed 107) transitions.
// Phase 1: matrix 164 rows 190 cols
[2026-05-23 10:45:31] [INFO ] Computed 62 invariants in 29 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:45:32] [INFO ] Implicit Places using invariants in 834 ms returned [75]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 917 ms to find 1 implicit places.
Starting structural reductions in LIVENESS mode, iteration 1 : 189/320 places, 164/271 transitions.
Applied a total of 0 rules in 6 ms. Remains 189 /189 variables (removed 0) and now considering 164/164 (removed 0) transitions.
Finished structural reductions in LIVENESS mode , in 2 iterations and 1058 ms. Remains : 189/320 places, 164/271 transitions.
Discarding 45 transitions out of 164. Remains 119
Initial state reduction rules removed 1 formulas.
[2026-05-23 10:45:33] [INFO ] Flatten gal took : 128 ms
RANDOM walk for 40000 steps (1398 resets) in 2684 ms. (14 steps per ms) remains 30/118 properties
[2026-05-23 10:45:33] [INFO ] Flatten gal took : 84 ms
BEST_FIRST walk for 4002 steps (19 resets) in 76 ms. (51 steps per ms) remains 30/30 properties
BEST_FIRST walk for 4003 steps (22 resets) in 69 ms. (57 steps per ms) remains 29/30 properties
BEST_FIRST walk for 4003 steps (20 resets) in 50 ms. (78 steps per ms) remains 29/29 properties
[2026-05-23 10:45:33] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality8079626517766673173.gal : 33 ms
BEST_FIRST walk for 4004 steps (21 resets) in 83 ms. (47 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (21 resets) in 57 ms. (69 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4003 steps (22 resets) in 33 ms. (117 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4003 steps (21 resets) in 30 ms. (129 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4003 steps (18 resets) in 38 ms. (102 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (17 resets) in 21 ms. (182 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4003 steps (15 resets) in 19 ms. (200 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (17 resets) in 23 ms. (166 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (15 resets) in 18 ms. (210 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (15 resets) in 26 ms. (148 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4003 steps (19 resets) in 21 ms. (181 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (19 resets) in 18 ms. (210 steps per ms) remains 29/29 properties
[2026-05-23 10:45:33] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality1876982846664580213.prop : 4 ms
BEST_FIRST walk for 4004 steps (18 resets) in 41 ms. (95 steps per ms) remains 29/29 properties
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/ReachabilityCardinality8079626517766673173.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality1876982846664580213.prop' '--nowitness' '--gen-order' 'FOLLOW'
BEST_FIRST walk for 4003 steps (17 resets) in 21 ms. (181 steps per ms) remains 29/29 properties

BEST_FIRST walk for 4003 steps (13 resets) in 31 ms. (125 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (18 resets) in 14 ms. (266 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (18 resets) in 15 ms. (250 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (16 resets) in 14 ms. (266 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (15 resets) in 16 ms. (235 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (19 resets) in 13 ms. (286 steps per ms) remains 29/29 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 4004 steps (20 resets) in 28 ms. (138 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4003 steps (18 resets) in 14 ms. (266 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (16 resets) in 13 ms. (286 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (17 resets) in 16 ms. (235 steps per ms) remains 29/29 properties
Loading property file /tmp/ReachabilityCardinality1876982846664580213.prop.
BEST_FIRST walk for 4004 steps (15 resets) in 32 ms. (121 steps per ms) remains 29/29 properties
BEST_FIRST walk for 4004 steps (18 resets) in 14 ms. (266 steps per ms) remains 29/29 properties
// Phase 1: matrix 164 rows 189 cols
SDD proceeding with computation,29 properties remain. new max is 4
SDD size :1 after 7
[2026-05-23 10:45:33] [INFO ] Computed 61 invariants in 11 ms
SDD proceeding with computation,29 properties remain. new max is 8
SDD size :7 after 15
SDD proceeding with computation,29 properties remain. new max is 16
SDD size :15 after 195
SDD proceeding with computation,29 properties remain. new max is 32
SDD size :195 after 4995
[2026-05-23 10:45:33] [INFO ] State equation strengthened by 6 read => feed constraints.
SDD proceeding with computation,29 properties remain. new max is 64
SDD size :4995 after 17925
SDD proceeding with computation,29 properties remain. new max is 128
SDD size :17925 after 43959
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
SDD proceeding with computation,29 properties remain. new max is 256
SDD size :43959 after 287117
SDD proceeding with computation,29 properties remain. new max is 512
SDD size :287117 after 377159
SDD proceeding with computation,29 properties remain. new max is 1024
SDD size :377159 after 1.85459e+06
At refinement iteration 0 (INCLUDED_ONLY) 0/37 variables, 37/37 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/37 variables, 0/37 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 2 (OVERLAPS) 20/57 variables, 6/43 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/57 variables, 20/63 constraints. Problems are: Problem set: 0 solved, 29 unsolved
SDD proceeding with computation,29 properties remain. new max is 2048
SDD size :1.85459e+06 after 3.38139e+07
At refinement iteration 4 (INCLUDED_ONLY) 0/57 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 5 (OVERLAPS) 74/131 variables, 26/89 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/131 variables, 74/163 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/131 variables, 0/163 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 8 (OVERLAPS) 48/179 variables, 27/190 constraints. Problems are: Problem set: 0 solved, 29 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (INCLUDED_ONLY) 0/179 variables, 48/238 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/179 variables, 0/238 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 11 (OVERLAPS) 4/183 variables, 2/240 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/183 variables, 4/244 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/183 variables, 0/244 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 14 (OVERLAPS) 164/347 variables, 183/427 constraints. Problems are: Problem set: 0 solved, 29 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/347 variables, 6/433 constraints. Problems are: Problem set: 0 solved, 29 unsolved
Reachability property qltransition_28 is true.
At refinement iteration 16 (INCLUDED_ONLY) 0/347 variables, 0/433 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 17 (OVERLAPS) 6/353 variables, 6/439 constraints. Problems are: Problem set: 1 solved, 28 unsolved
SDD proceeding with computation,28 properties remain. new max is 2048
SDD size :3.38139e+07 after 5.46161e+10
At refinement iteration 18 (INCLUDED_ONLY) 0/353 variables, 6/445 constraints. Problems are: Problem set: 1 solved, 28 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:45:37] [INFO ] Deduced a trap composed of 14 places in 87 ms of which 17 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:45:37] [INFO ] Deduced a trap composed of 14 places in 83 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:45:37] [INFO ] Deduced a trap composed of 11 places in 63 ms of which 6 ms to minimize.
At refinement iteration 19 (INCLUDED_ONLY) 0/353 variables, 3/448 constraints. Problems are: Problem set: 1 solved, 28 unsolved
SDD proceeding with computation,28 properties remain. new max is 4096
SDD size :5.46161e+10 after 5.82677e+10
At refinement iteration 20 (INCLUDED_ONLY) 0/353 variables, 0/448 constraints. Problems are: Problem set: 1 solved, 28 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 353/353 variables, and 448 constraints, problems are : Problem set: 1 solved, 28 unsolved in 5027 ms.
Refiners :[Domain max(s): 189/189 constraints, Positive P Invariants (semi-flows): 32/32 constraints, Generalized P Invariants (flows): 29/29 constraints, State Equation: 189/189 constraints, ReadFeed: 6/6 constraints, PredecessorRefiner: 29/29 constraints, Known Traps: 3/3 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 1 solved, 28 unsolved
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/36 variables, 36/36 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/36 variables, 0/36 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 2 (OVERLAPS) 20/56 variables, 6/42 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/56 variables, 20/62 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/56 variables, 0/62 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 5 (OVERLAPS) 74/130 variables, 26/88 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/130 variables, 74/162 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/130 variables, 1/163 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/130 variables, 0/163 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 9 (OVERLAPS) 49/179 variables, 27/190 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/179 variables, 49/239 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/179 variables, 2/241 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/179 variables, 0/241 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 13 (OVERLAPS) 4/183 variables, 2/243 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/183 variables, 4/247 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/183 variables, 0/247 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 16 (OVERLAPS) 164/347 variables, 183/430 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/347 variables, 6/436 constraints. Problems are: Problem set: 1 solved, 28 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/347 variables, 10/446 constraints. Problems are: Problem set: 1 solved, 28 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:45:42] [INFO ] Deduced a trap composed of 26 places in 91 ms of which 9 ms to minimize.
Reachability property qltransition_29 is true.
SDD proceeding with computation,27 properties remain. new max is 4096
SDD size :5.82677e+10 after 1.77428e+11
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 347/353 variables, and 447 constraints, problems are : Problem set: 2 solved, 27 unsolved in 5013 ms.
Refiners :[Domain max(s): 183/189 constraints, Positive P Invariants (semi-flows): 32/32 constraints, Generalized P Invariants (flows): 29/29 constraints, State Equation: 183/189 constraints, ReadFeed: 6/6 constraints, PredecessorRefiner: 10/29 constraints, Known Traps: 4/4 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 10244ms problems are : Problem set: 2 solved, 27 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 35 out of 189 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 189/189 places, 164/164 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 189 transition count 163
Discarding 17 places :
Symmetric choice reduction at 1 with 17 rule applications. Total rules 18 place count 172 transition count 126
Iterating global reduction 1 with 17 rules applied. Total rules applied 35 place count 172 transition count 126
Ensure Unique test removed 10 transitions
Reduce isomorphic transitions removed 10 transitions.
Iterating post reduction 1 with 10 rules applied. Total rules applied 45 place count 172 transition count 116
Performed 3 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 3 Pre rules applied. Total rules applied 45 place count 172 transition count 113
Deduced a syphon composed of 3 places in 2 ms
Reduce places removed 3 places and 0 transitions.
Iterating global reduction 2 with 6 rules applied. Total rules applied 51 place count 169 transition count 113
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 55 place count 165 transition count 109
Iterating global reduction 2 with 4 rules applied. Total rules applied 59 place count 165 transition count 109
Ensure Unique test removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Iterating post reduction 2 with 4 rules applied. Total rules applied 63 place count 165 transition count 105
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 1 places in 1 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 3 with 2 rules applied. Total rules applied 65 place count 164 transition count 105
Free-agglomeration rule applied 1 times.
Iterating global reduction 3 with 1 rules applied. Total rules applied 66 place count 164 transition count 104
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 3 with 1 rules applied. Total rules applied 67 place count 163 transition count 104
Free-agglomeration rule (complex) applied 1 times.
Iterating global reduction 4 with 1 rules applied. Total rules applied 68 place count 163 transition count 103
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 4 with 1 rules applied. Total rules applied 69 place count 162 transition count 103
Applied a total of 69 rules in 114 ms. Remains 162 /189 variables (removed 27) and now considering 103/164 (removed 61) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 114 ms. Remains : 162/189 places, 103/164 transitions.
Reachability property qltransition_30 is true.
SDD proceeding with computation,26 properties remain. new max is 4096
SDD size :1.77428e+11 after 2.76235e+11
RANDOM walk for 4000000 steps (184018 resets) in 30868 ms. (129 steps per ms) remains 24/27 properties
BEST_FIRST walk for 400003 steps (3802 resets) in 1399 ms. (285 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400002 steps (4486 resets) in 1035 ms. (386 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400004 steps (4433 resets) in 1561 ms. (256 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400003 steps (4454 resets) in 1541 ms. (259 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400002 steps (4454 resets) in 1867 ms. (214 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400003 steps (4462 resets) in 1472 ms. (271 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400003 steps (3555 resets) in 1512 ms. (264 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400004 steps (3609 resets) in 1574 ms. (253 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400003 steps (3527 resets) in 1219 ms. (327 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400004 steps (3588 resets) in 1030 ms. (387 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400004 steps (3701 resets) in 964 ms. (414 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400003 steps (3751 resets) in 1115 ms. (358 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400003 steps (3829 resets) in 1086 ms. (367 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400004 steps (3815 resets) in 1029 ms. (388 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400004 steps (3828 resets) in 1056 ms. (378 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400003 steps (3745 resets) in 1027 ms. (389 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400002 steps (3782 resets) in 952 ms. (419 steps per ms) remains 24/24 properties
Reachability property qltransition_31 is true.
BEST_FIRST walk for 400003 steps (3816 resets) in 998 ms. (400 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400004 steps (3852 resets) in 970 ms. (411 steps per ms) remains 24/24 properties
SDD proceeding with computation,25 properties remain. new max is 4096
SDD size :2.76235e+11 after 3.64294e+11
BEST_FIRST walk for 400004 steps (3908 resets) in 1098 ms. (363 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400002 steps (3834 resets) in 1037 ms. (385 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400004 steps (3811 resets) in 944 ms. (423 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400003 steps (3889 resets) in 1065 ms. (375 steps per ms) remains 24/24 properties
BEST_FIRST walk for 400003 steps (3843 resets) in 958 ms. (417 steps per ms) remains 24/24 properties
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:46:02] [INFO ] Computed 62 invariants in 4 ms
[2026-05-23 10:46:02] [INFO ] State equation strengthened by 3 read => feed constraints.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/30 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 1 (OVERLAPS) 8/38 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/38 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 3 (OVERLAPS) 73/111 variables, 29/34 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/111 variables, 0/34 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 5 (OVERLAPS) 47/158 variables, 28/62 constraints. Problems are: Problem set: 0 solved, 22 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:46:03] [INFO ] Deduced a trap composed of 14 places in 70 ms of which 10 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:46:03] [INFO ] Deduced a trap composed of 16 places in 71 ms of which 4 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 2/64 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/64 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/222 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/225 constraints. Problems are: Problem set: 0 solved, 22 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:46:03] [INFO ] Deduced a trap composed of 14 places in 60 ms of which 9 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/226 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/230 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 22 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 230 constraints, problems are : Problem set: 0 solved, 22 unsolved in 2346 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 22/22 constraints, Known Traps: 3/3 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 22 unsolved
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/30 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 1 (OVERLAPS) 8/38 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/38 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 3 (OVERLAPS) 73/111 variables, 29/34 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/111 variables, 0/34 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 5 (OVERLAPS) 47/158 variables, 28/62 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 3/65 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/65 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/223 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/226 constraints. Problems are: Problem set: 0 solved, 22 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 9/235 constraints. Problems are: Problem set: 0 solved, 22 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:46:05] [INFO ] Deduced a trap composed of 19 places in 56 ms of which 7 ms to minimize.
Reachability property qltransition_32 is true.
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 1/236 constraints. Problems are: Problem set: 1 solved, 21 unsolved
SDD proceeding with computation,24 properties remain. new max is 4096
SDD size :3.64294e+11 after 4.52389e+11
At refinement iteration 12 (INCLUDED_ONLY) 0/261 variables, 0/236 constraints. Problems are: Problem set: 1 solved, 21 unsolved
At refinement iteration 13 (OVERLAPS) 4/265 variables, 4/240 constraints. Problems are: Problem set: 1 solved, 21 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/265 variables, 12/252 constraints. Problems are: Problem set: 1 solved, 21 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/265 variables, 0/252 constraints. Problems are: Problem set: 1 solved, 21 unsolved
Reachability property qltransition_33 is true.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:46:11] [INFO ] Deduced a trap composed of 6 places in 38 ms of which 2 ms to minimize.
SDD proceeding with computation,23 properties remain. new max is 4096
SDD size :4.52389e+11 after 5.40495e+11
At refinement iteration 16 (OVERLAPS) 0/265 variables, 1/253 constraints. Problems are: Problem set: 2 solved, 20 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/265 variables, 0/253 constraints. Problems are: Problem set: 2 solved, 20 unsolved
At refinement iteration 18 (OVERLAPS) 0/265 variables, 0/253 constraints. Problems are: Problem set: 2 solved, 20 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 253 constraints, problems are : Problem set: 2 solved, 20 unsolved in 12805 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 21/22 constraints, Known Traps: 5/5 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 15197ms problems are : Problem set: 2 solved, 20 unsolved
SDD proceeding with computation,23 properties remain. new max is 8192
SDD size :5.40495e+11 after 6.28557e+11
Parikh walk visited 0 properties in 2586 ms.
Support contains 27 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Applied a total of 0 rules in 9 ms. Remains 162 /162 variables (removed 0) and now considering 103/103 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 9 ms. Remains : 162/162 places, 103/103 transitions.
RANDOM walk for 4000000 steps (184055 resets) in 27511 ms. (145 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400003 steps (3776 resets) in 1016 ms. (393 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400003 steps (4454 resets) in 956 ms. (417 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400002 steps (4454 resets) in 1085 ms. (368 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400003 steps (4445 resets) in 1106 ms. (361 steps per ms) remains 20/20 properties
SDD proceeding with computation,23 properties remain. new max is 16384
BEST_FIRST walk for 400003 steps (4435 resets) in 982 ms. (406 steps per ms) remains 20/20 properties
SDD size :6.28557e+11 after 7.46554e+11
BEST_FIRST walk for 400003 steps (4449 resets) in 1081 ms. (369 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400004 steps (3770 resets) in 1097 ms. (364 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400003 steps (3774 resets) in 1028 ms. (388 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400003 steps (3741 resets) in 949 ms. (421 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400004 steps (3777 resets) in 1135 ms. (352 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400003 steps (3772 resets) in 1015 ms. (393 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400002 steps (3859 resets) in 1096 ms. (364 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400004 steps (3810 resets) in 1166 ms. (342 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400003 steps (3810 resets) in 983 ms. (406 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400004 steps (3777 resets) in 1069 ms. (373 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400003 steps (3836 resets) in 1151 ms. (347 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400002 steps (3804 resets) in 963 ms. (414 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400004 steps (3851 resets) in 1019 ms. (392 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400003 steps (3876 resets) in 1083 ms. (369 steps per ms) remains 20/20 properties
BEST_FIRST walk for 400004 steps (3840 resets) in 1060 ms. (377 steps per ms) remains 20/20 properties
SDD proceeding with computation,23 properties remain. new max is 32768
SDD size :7.46554e+11 after 2.13563e+12
Interrupted probabilistic random walk after 8130715 steps, run timeout after 45001 ms. (steps per millisecond=180 ) properties seen :0 out of 20
Probabilistic random walk after 8130715 steps, saw 1045471 distinct states, run finished after 45014 ms. (steps per millisecond=180 ) properties seen :0
[2026-05-23 10:47:20] [INFO ] Invariant cache hit.
[2026-05-23 10:47:20] [INFO ] State equation strengthened by 3 read => feed constraints.
Starting Z3 with timeout 75.0 s and query timeout 7500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/27 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 1 (OVERLAPS) 7/34 variables, 4/4 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/34 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 3 (OVERLAPS) 75/109 variables, 30/34 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/109 variables, 0/34 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 5 (OVERLAPS) 49/158 variables, 28/62 constraints. Problems are: Problem set: 0 solved, 20 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 20 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:47:21] [INFO ] Deduced a trap composed of 14 places in 49 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:47:21] [INFO ] Deduced a trap composed of 16 places in 45 ms of which 4 ms to minimize.
SDD proceeding with computation,23 properties remain. new max is 65536
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 2/225 constraints. Problems are: Problem set: 0 solved, 20 unsolved
SDD size :2.13563e+12 after 4.17561e+12
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 11 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 20 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:47:21] [INFO ] Deduced a trap along path composed of 5 places in 44 ms of which 3 ms to minimize.
At refinement iteration 12 (INCLUDED_ONLY) 0/265 variables, 1/230 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 20 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 230 constraints, problems are : Problem set: 0 solved, 20 unsolved in 2253 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 20/20 constraints, Known Traps: 2/2 constraints, Known Traps Along Path: 1/1 constraints]
Escalating to Integer solving :Problem set: 0 solved, 20 unsolved
Starting Z3 with timeout 75.0 s and query timeout 7500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/27 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 1 (OVERLAPS) 7/34 variables, 4/4 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/34 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 3 (OVERLAPS) 75/109 variables, 30/34 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/109 variables, 0/34 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 5 (OVERLAPS) 49/158 variables, 28/62 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 2/64 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/64 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/222 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/225 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 9/234 constraints. Problems are: Problem set: 0 solved, 20 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:47:23] [INFO ] Deduced a trap composed of 19 places in 56 ms of which 6 ms to minimize.
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 1/235 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/261 variables, 0/235 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 13 (OVERLAPS) 4/265 variables, 4/239 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/265 variables, 11/250 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/265 variables, 1/251 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/265 variables, 0/251 constraints. Problems are: Problem set: 0 solved, 20 unsolved
At refinement iteration 17 (OVERLAPS) 0/265 variables, 0/251 constraints. Problems are: Problem set: 0 solved, 20 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 251 constraints, problems are : Problem set: 0 solved, 20 unsolved in 9787 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 20/20 constraints, Known Traps: 3/3 constraints, Known Traps Along Path: 1/1 constraints]
After SMT, in 12058ms problems are : Problem set: 0 solved, 20 unsolved
Parikh walk visited 0 properties in 2939 ms.
Support contains 27 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Applied a total of 0 rules in 12 ms. Remains 162 /162 variables (removed 0) and now considering 103/103 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 12 ms. Remains : 162/162 places, 103/103 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Applied a total of 0 rules in 16 ms. Remains 162 /162 variables (removed 0) and now considering 103/103 (removed 0) transitions.
[2026-05-23 10:47:35] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:47:35] [INFO ] Implicit Places using invariants in 196 ms returned []
[2026-05-23 10:47:35] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:47:35] [INFO ] State equation strengthened by 3 read => feed constraints.
[2026-05-23 10:47:35] [INFO ] Implicit Places using invariants and state equation in 309 ms returned []
Implicit Place search using SMT with State Equation took 507 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:47:35] [INFO ] Redundant transitions in 3 ms returned []
Running 102 sub problems to find dead transitions.
[2026-05-23 10:47:35] [INFO ] Invariant cache hit.
[2026-05-23 10:47:35] [INFO ] State equation strengthened by 3 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/161 variables, 14/14 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/161 variables, 0/14 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 2 (OVERLAPS) 1/162 variables, 34/48 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/162 variables, 14/62 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/162 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 5 (OVERLAPS) 103/265 variables, 162/224 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/265 variables, 3/227 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:47:38] [INFO ] Deduced a trap composed of 14 places in 53 ms of which 7 ms to minimize.
At refinement iteration 7 (INCLUDED_ONLY) 0/265 variables, 1/228 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:47:38] [INFO ] Deduced a trap composed of 6 places in 29 ms of which 2 ms to minimize.
At refinement iteration 8 (INCLUDED_ONLY) 0/265 variables, 1/229 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 10 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 102 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 102 unsolved in 6030 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 102/102 constraints, Known Traps: 2/2 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/161 variables, 14/14 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/161 variables, 0/14 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 2 (OVERLAPS) 1/162 variables, 34/48 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/162 variables, 14/62 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/162 variables, 2/64 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:47:42] [INFO ] Deduced a trap composed of 11 places in 58 ms of which 6 ms to minimize.
At refinement iteration 5 (INCLUDED_ONLY) 0/162 variables, 1/65 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/162 variables, 0/65 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 7 (OVERLAPS) 103/265 variables, 162/227 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/265 variables, 3/230 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Reachability property qltransition_90 is true.
At refinement iteration 9 (INCLUDED_ONLY) 0/265 variables, 102/332 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:47:47] [INFO ] Deduced a trap composed of 19 places in 62 ms of which 8 ms to minimize.
Reachability property qltransition_19 is true.
SDD proceeding with computation,21 properties remain. new max is 65536
SDD size :4.17561e+12 after 1.45941e+13
At refinement iteration 10 (INCLUDED_ONLY) 0/265 variables, 1/333 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 265/265 variables, and 333 constraints, problems are : Problem set: 0 solved, 102 unsolved in 30013 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 102/102 constraints, Known Traps: 4/4 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 36081ms problems are : Problem set: 0 solved, 102 unsolved
Search for dead transitions found 0 dead transitions in 36084ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 36618 ms. Remains : 162/162 places, 103/103 transitions.
RANDOM walk for 400000 steps (18296 resets) in 4561 ms. (87 steps per ms) remains 18/27 properties
Running SMT prover for 18 properties.
[2026-05-23 10:48:13] [INFO ] Invariant cache hit.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:48:13] [INFO ] [Real]Absence check using 34 positive place invariants in 10 ms returned sat
[2026-05-23 10:48:13] [INFO ] [Real]Absence check using 34 positive and 28 generalized place invariants in 18 ms returned sat
[2026-05-23 10:48:13] [INFO ] After 132ms SMT Verify possible using state equation in real domain returned unsat :0 sat :18
[2026-05-23 10:48:13] [INFO ] State equation strengthened by 3 read => feed constraints.
[2026-05-23 10:48:13] [INFO ] After 36ms SMT Verify possible using 3 Read/Feed constraints in real domain returned unsat :0 sat :18
TRAPS : Iteration 0
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:48:13] [INFO ] Deduced a trap composed of 14 places in 50 ms of which 6 ms to minimize.
TRAPS : Iteration 1
[2026-05-23 10:48:14] [INFO ] After 419ms SMT Verify possible using trap constraints in real domain returned unsat :0 sat :1 real:17
[2026-05-23 10:48:14] [INFO ] After 672ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :1 real:17
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:48:14] [INFO ] [Nat]Absence check using 34 positive place invariants in 11 ms returned sat
[2026-05-23 10:48:14] [INFO ] [Nat]Absence check using 34 positive and 28 generalized place invariants in 15 ms returned sat
[2026-05-23 10:48:14] [INFO ] After 122ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :18
[2026-05-23 10:48:14] [INFO ] After 36ms SMT Verify possible using 3 Read/Feed constraints in natural domain returned unsat :0 sat :18
TRAPS : Iteration 0
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:48:14] [INFO ] Deduced a trap composed of 14 places in 50 ms of which 7 ms to minimize.
[2026-05-23 10:48:14] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 69 ms
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:48:14] [INFO ] Deduced a trap composed of 6 places in 36 ms of which 4 ms to minimize.
[2026-05-23 10:48:14] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 51 ms
TRAPS : Iteration 1
[2026-05-23 10:48:14] [INFO ] After 594ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :18
[2026-05-23 10:48:14] [INFO ] After 864ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :18
RANDOM walk for 4000000 steps (183351 resets) in 27623 ms. (144 steps per ms) remains 19/20 properties
BEST_FIRST walk for 400003 steps (3756 resets) in 941 ms. (424 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (4492 resets) in 978 ms. (408 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (4419 resets) in 928 ms. (430 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (4418 resets) in 986 ms. (405 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (4458 resets) in 981 ms. (407 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3831 resets) in 820 ms. (487 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3793 resets) in 829 ms. (481 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400002 steps (3794 resets) in 850 ms. (470 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (3800 resets) in 1171 ms. (341 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (3826 resets) in 1333 ms. (299 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3824 resets) in 1016 ms. (393 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3810 resets) in 872 ms. (458 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400002 steps (3814 resets) in 1045 ms. (382 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (3910 resets) in 944 ms. (423 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3841 resets) in 1047 ms. (381 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3854 resets) in 938 ms. (425 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3804 resets) in 1016 ms. (393 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (3872 resets) in 1011 ms. (395 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3817 resets) in 1093 ms. (365 steps per ms) remains 19/19 properties
Reachability property qltransition_18 is true.
SDD proceeding with computation,20 properties remain. new max is 65536
SDD size :1.45941e+13 after 3.41639e+13
Interrupted probabilistic random walk after 6839012 steps, run timeout after 39001 ms. (steps per millisecond=175 ) properties seen :0 out of 19
Probabilistic random walk after 6839012 steps, saw 877294 distinct states, run finished after 39002 ms. (steps per millisecond=175 ) properties seen :0
[2026-05-23 10:49:07] [INFO ] Invariant cache hit.
[2026-05-23 10:49:07] [INFO ] State equation strengthened by 3 read => feed constraints.
Starting Z3 with timeout 90.0 s and query timeout 9000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/26 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 1 (OVERLAPS) 7/33 variables, 4/4 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/33 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 3 (OVERLAPS) 75/108 variables, 30/34 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/108 variables, 0/34 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 5 (OVERLAPS) 50/158 variables, 28/62 constraints. Problems are: Problem set: 0 solved, 19 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 19 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:49:08] [INFO ] Deduced a trap composed of 14 places in 79 ms of which 8 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 11 (OVERLAPS) 4/265 variables, 4/228 constraints. Problems are: Problem set: 0 solved, 19 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:49:09] [INFO ] Deduced a trap composed of 6 places in 52 ms of which 5 ms to minimize.
At refinement iteration 12 (INCLUDED_ONLY) 0/265 variables, 1/229 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 19 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 19 unsolved in 2043 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 19/19 constraints, Known Traps: 2/2 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 19 unsolved
Starting Z3 with timeout 90.0 s and query timeout 9000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/26 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 1 (OVERLAPS) 7/33 variables, 4/4 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/33 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 3 (OVERLAPS) 75/108 variables, 30/34 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/108 variables, 0/34 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 5 (OVERLAPS) 50/158 variables, 28/62 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 1/63 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 9/233 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/233 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/237 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 10/247 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/265 variables, 1/248 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/265 variables, 0/248 constraints. Problems are: Problem set: 0 solved, 19 unsolved
At refinement iteration 16 (OVERLAPS) 0/265 variables, 0/248 constraints. Problems are: Problem set: 0 solved, 19 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 248 constraints, problems are : Problem set: 0 solved, 19 unsolved in 7763 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 19/19 constraints, Known Traps: 2/2 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 9818ms problems are : Problem set: 0 solved, 19 unsolved
Parikh walk visited 0 properties in 2292 ms.
Support contains 26 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Applied a total of 0 rules in 8 ms. Remains 162 /162 variables (removed 0) and now considering 103/103 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 8 ms. Remains : 162/162 places, 103/103 transitions.
RANDOM walk for 4000000 steps (183475 resets) in 35993 ms. (111 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3830 resets) in 1610 ms. (248 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (4465 resets) in 1624 ms. (246 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (4444 resets) in 958 ms. (417 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (4456 resets) in 1062 ms. (376 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (4452 resets) in 1539 ms. (259 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3827 resets) in 923 ms. (432 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (3873 resets) in 969 ms. (412 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400001 steps (3844 resets) in 836 ms. (477 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (3756 resets) in 1021 ms. (391 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400002 steps (3765 resets) in 831 ms. (480 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3859 resets) in 1120 ms. (356 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3768 resets) in 873 ms. (457 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400002 steps (3759 resets) in 1062 ms. (376 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400002 steps (3836 resets) in 950 ms. (420 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400002 steps (3820 resets) in 1049 ms. (380 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (3879 resets) in 918 ms. (435 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400004 steps (3857 resets) in 923 ms. (432 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400003 steps (3806 resets) in 1057 ms. (378 steps per ms) remains 19/19 properties
BEST_FIRST walk for 400002 steps (3821 resets) in 875 ms. (456 steps per ms) remains 19/19 properties
Reachability property qltransition_118 is true.
Reachability property qltransition_89 is true.
Interrupted probabilistic random walk after 10870789 steps, run timeout after 51001 ms. (steps per millisecond=213 ) properties seen :0 out of 19
Probabilistic random walk after 10870789 steps, saw 1379214 distinct states, run finished after 51001 ms. (steps per millisecond=213 ) properties seen :0
[2026-05-23 10:50:28] [INFO ] Invariant cache hit.
[2026-05-23 10:50:28] [INFO ] State equation strengthened by 3 read => feed constraints.
Starting Z3 with timeout 105.0 s and query timeout 10500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/25 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 1 (OVERLAPS) 7/32 variables, 4/4 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/32 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 3 (OVERLAPS) 75/107 variables, 30/34 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/107 variables, 0/34 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 5 (OVERLAPS) 51/158 variables, 28/62 constraints. Problems are: Problem set: 0 solved, 18 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 18 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:50:29] [INFO ] Deduced a trap composed of 14 places in 60 ms of which 9 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 18 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:50:29] [INFO ] Deduced a trap composed of 16 places in 73 ms of which 6 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 18 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:50:29] [INFO ] Deduced a trap composed of 6 places in 36 ms of which 3 ms to minimize.
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 1/230 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 15 (OVERLAPS) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 18 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 230 constraints, problems are : Problem set: 0 solved, 18 unsolved in 2257 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 18/18 constraints, Known Traps: 3/3 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 18 unsolved
Starting Z3 with timeout 105.0 s and query timeout 10500.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/25 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 1 (OVERLAPS) 7/32 variables, 4/4 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/32 variables, 0/4 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 3 (OVERLAPS) 75/107 variables, 30/34 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/107 variables, 0/34 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 5 (OVERLAPS) 51/158 variables, 28/62 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 2/64 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/64 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/222 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/225 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 8/233 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/233 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/237 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 10/247 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/265 variables, 1/248 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/265 variables, 0/248 constraints. Problems are: Problem set: 0 solved, 18 unsolved
At refinement iteration 16 (OVERLAPS) 0/265 variables, 0/248 constraints. Problems are: Problem set: 0 solved, 18 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 248 constraints, problems are : Problem set: 0 solved, 18 unsolved in 6680 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 18/18 constraints, Known Traps: 3/3 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 8957ms problems are : Problem set: 0 solved, 18 unsolved
Parikh walk visited 0 properties in 2074 ms.
Support contains 25 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Applied a total of 0 rules in 9 ms. Remains 162 /162 variables (removed 0) and now considering 103/103 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 9 ms. Remains : 162/162 places, 103/103 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Applied a total of 0 rules in 7 ms. Remains 162 /162 variables (removed 0) and now considering 103/103 (removed 0) transitions.
[2026-05-23 10:50:39] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:50:39] [INFO ] Implicit Places using invariants in 175 ms returned []
[2026-05-23 10:50:39] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:50:39] [INFO ] State equation strengthened by 3 read => feed constraints.
[2026-05-23 10:50:39] [INFO ] Implicit Places using invariants and state equation in 413 ms returned []
Implicit Place search using SMT with State Equation took 591 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:50:39] [INFO ] Redundant transitions in 2 ms returned []
Running 102 sub problems to find dead transitions.
[2026-05-23 10:50:39] [INFO ] Invariant cache hit.
[2026-05-23 10:50:39] [INFO ] State equation strengthened by 3 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/161 variables, 14/14 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/161 variables, 0/14 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 2 (OVERLAPS) 1/162 variables, 34/48 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/162 variables, 14/62 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/162 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 5 (OVERLAPS) 103/265 variables, 162/224 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/265 variables, 3/227 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:50:42] [INFO ] Deduced a trap composed of 14 places in 52 ms of which 7 ms to minimize.
At refinement iteration 7 (INCLUDED_ONLY) 0/265 variables, 1/228 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:50:43] [INFO ] Deduced a trap composed of 6 places in 46 ms of which 3 ms to minimize.
SDD proceeding with computation,18 properties remain. new max is 65536
At refinement iteration 8 (INCLUDED_ONLY) 0/265 variables, 1/229 constraints. Problems are: Problem set: 0 solved, 102 unsolved
SDD size :9.65107e+13 after 9.69273e+13
At refinement iteration 9 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 10 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 102 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 102 unsolved in 6700 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 102/102 constraints, Known Traps: 2/2 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/161 variables, 14/14 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/161 variables, 0/14 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 2 (OVERLAPS) 1/162 variables, 34/48 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/162 variables, 14/62 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/162 variables, 2/64 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:50:47] [INFO ] Deduced a trap composed of 11 places in 58 ms of which 5 ms to minimize.
At refinement iteration 5 (INCLUDED_ONLY) 0/162 variables, 1/65 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/162 variables, 0/65 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 7 (OVERLAPS) 103/265 variables, 162/227 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/265 variables, 3/230 constraints. Problems are: Problem set: 0 solved, 102 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/265 variables, 102/332 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:50:52] [INFO ] Deduced a trap composed of 19 places in 70 ms of which 11 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/265 variables, 1/333 constraints. Problems are: Problem set: 0 solved, 102 unsolved
Reachability property qltransition_117 is true.
Reachability property qltransition_88 is true.
Reachability property qltransition_17 is true.
SDD proceeding with computation,15 properties remain. new max is 65536
SDD size :9.69273e+13 after 1.284e+14
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 265/265 variables, and 333 constraints, problems are : Problem set: 0 solved, 102 unsolved in 30013 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 102/102 constraints, Known Traps: 4/4 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 36750ms problems are : Problem set: 0 solved, 102 unsolved
Search for dead transitions found 0 dead transitions in 36754ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 37363 ms. Remains : 162/162 places, 103/103 transitions.
RANDOM walk for 400000 steps (18348 resets) in 3007 ms. (132 steps per ms) remains 18/22 properties
Running SMT prover for 18 properties.
[2026-05-23 10:51:17] [INFO ] Invariant cache hit.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:51:17] [INFO ] [Real]Absence check using 34 positive place invariants in 9 ms returned sat
[2026-05-23 10:51:17] [INFO ] [Real]Absence check using 34 positive and 28 generalized place invariants in 16 ms returned sat
[2026-05-23 10:51:17] [INFO ] After 119ms SMT Verify possible using state equation in real domain returned unsat :0 sat :18
[2026-05-23 10:51:17] [INFO ] State equation strengthened by 3 read => feed constraints.
[2026-05-23 10:51:17] [INFO ] After 34ms SMT Verify possible using 3 Read/Feed constraints in real domain returned unsat :0 sat :18
TRAPS : Iteration 0
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:18] [INFO ] Deduced a trap composed of 14 places in 51 ms of which 6 ms to minimize.
TRAPS : Iteration 1
[2026-05-23 10:51:18] [INFO ] After 425ms SMT Verify possible using trap constraints in real domain returned unsat :0 sat :1 real:17
[2026-05-23 10:51:18] [INFO ] After 645ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :1 real:17
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:51:18] [INFO ] [Nat]Absence check using 34 positive place invariants in 9 ms returned sat
[2026-05-23 10:51:18] [INFO ] [Nat]Absence check using 34 positive and 28 generalized place invariants in 16 ms returned sat
[2026-05-23 10:51:18] [INFO ] After 113ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :18
[2026-05-23 10:51:18] [INFO ] After 38ms SMT Verify possible using 3 Read/Feed constraints in natural domain returned unsat :0 sat :18
TRAPS : Iteration 0
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:18] [INFO ] Deduced a trap composed of 14 places in 49 ms of which 7 ms to minimize.
[2026-05-23 10:51:18] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 66 ms
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:18] [INFO ] Deduced a trap composed of 6 places in 41 ms of which 3 ms to minimize.
[2026-05-23 10:51:18] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 61 ms
TRAPS : Iteration 1
[2026-05-23 10:51:19] [INFO ] After 662ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :18
[2026-05-23 10:51:19] [INFO ] After 918ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :18
RANDOM walk for 40000 steps (1847 resets) in 171 ms. (232 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (359 resets) in 174 ms. (228 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1463660 steps, run timeout after 3001 ms. (steps per millisecond=487 ) properties seen :0 out of 1
Probabilistic random walk after 1463660 steps, saw 188183 distinct states, run finished after 3001 ms. (steps per millisecond=487 ) properties seen :0
[2026-05-23 10:51:22] [INFO ] Invariant cache hit.
[2026-05-23 10:51:22] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 191 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:22] [INFO ] Deduced a trap composed of 14 places in 60 ms of which 9 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 286 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 483ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 128 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 161 transition count 102
Applied a total of 1 rules in 16 ms. Remains 161 /162 variables (removed 1) and now considering 102/103 (removed 1) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 17 ms. Remains : 161/162 places, 102/103 transitions.
RANDOM walk for 40000 steps (1915 resets) in 162 ms. (245 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (384 resets) in 85 ms. (465 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1467448 steps, run timeout after 3001 ms. (steps per millisecond=488 ) properties seen :0 out of 1
Probabilistic random walk after 1467448 steps, saw 188698 distinct states, run finished after 3001 ms. (steps per millisecond=488 ) properties seen :0
// Phase 1: matrix 102 rows 161 cols
[2026-05-23 10:51:26] [INFO ] Computed 62 invariants in 7 ms
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) 69/70 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/70 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 35/105 variables, 23/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/105 variables, 0/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 37/142 variables, 19/51 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/142 variables, 0/51 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/149 variables, 7/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/149 variables, 0/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 97/246 variables, 149/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/246 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 15/261 variables, 10/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/261 variables, 4/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/261 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 2/263 variables, 2/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/263 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 0/263 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 263/263 variables, and 223 constraints, problems are : Problem set: 0 solved, 1 unsolved in 183 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 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) 69/70 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/70 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 35/105 variables, 23/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/105 variables, 0/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 37/142 variables, 19/51 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/142 variables, 0/51 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/149 variables, 7/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/149 variables, 0/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 97/246 variables, 149/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/246 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/246 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 15/261 variables, 10/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/261 variables, 4/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/261 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 2/263 variables, 2/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/263 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 0/263 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 263/263 variables, and 224 constraints, problems are : Problem set: 0 solved, 1 unsolved in 283 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 481ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 106 ms.
Support contains 1 out of 161 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 161/161 places, 102/102 transitions.
Applied a total of 0 rules in 7 ms. Remains 161 /161 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 7 ms. Remains : 161/161 places, 102/102 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 161/161 places, 102/102 transitions.
Applied a total of 0 rules in 8 ms. Remains 161 /161 variables (removed 0) and now considering 102/102 (removed 0) transitions.
[2026-05-23 10:51:26] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:51:26] [INFO ] Implicit Places using invariants in 172 ms returned []
[2026-05-23 10:51:26] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:51:27] [INFO ] Implicit Places using invariants and state equation in 296 ms returned [12]
Discarding 1 places :
Implicit Place search using SMT with State Equation took 470 ms to find 1 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 1 : 160/161 places, 102/102 transitions.
Applied a total of 0 rules in 8 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 2 iterations and 488 ms. Remains : 160/161 places, 102/102 transitions.
RANDOM walk for 40000 steps (1973 resets) in 145 ms. (273 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (378 resets) in 82 ms. (481 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1498462 steps, run timeout after 3001 ms. (steps per millisecond=499 ) properties seen :0 out of 1
Probabilistic random walk after 1498462 steps, saw 192371 distinct states, run finished after 3001 ms. (steps per millisecond=499 ) properties seen :0
// Phase 1: matrix 102 rows 160 cols
[2026-05-23 10:51:30] [INFO ] Computed 61 invariants in 2 ms
Starting Z3 with timeout 75.0 s and query timeout 7500.0 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) 69/70 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/70 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 35/105 variables, 23/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/105 variables, 0/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 36/141 variables, 18/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/141 variables, 0/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/148 variables, 7/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/148 variables, 0/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 97/245 variables, 148/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/245 variables, 0/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 15/260 variables, 10/215 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/260 variables, 4/219 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/260 variables, 0/219 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 2/262 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/262 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 0/262 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 262/262 variables, and 221 constraints, problems are : Problem set: 0 solved, 1 unsolved in 334 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 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 75.0 s and query timeout 7500.0 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) 69/70 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/70 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 35/105 variables, 23/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/105 variables, 0/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 36/141 variables, 18/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/141 variables, 0/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/148 variables, 7/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/148 variables, 0/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 97/245 variables, 148/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/245 variables, 1/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:31] [INFO ] Deduced a trap composed of 13 places in 69 ms of which 7 ms to minimize.
At refinement iteration 11 (INCLUDED_ONLY) 0/245 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/245 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 15/260 variables, 10/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/260 variables, 4/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/260 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 2/262 variables, 2/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/262 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 0/262 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 262/262 variables, and 223 constraints, problems are : Problem set: 0 solved, 1 unsolved in 1027 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 1375ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 114 ms.
Support contains 1 out of 160 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 160/160 places, 102/102 transitions.
Applied a total of 0 rules in 6 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 6 ms. Remains : 160/160 places, 102/102 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 160/160 places, 102/102 transitions.
Applied a total of 0 rules in 6 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
[2026-05-23 10:51:31] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:51:31] [INFO ] Implicit Places using invariants in 164 ms returned []
[2026-05-23 10:51:31] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:51:32] [INFO ] Implicit Places using invariants and state equation in 277 ms returned []
Implicit Place search using SMT with State Equation took 443 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:51:32] [INFO ] Redundant transitions in 2 ms returned []
Running 99 sub problems to find dead transitions.
[2026-05-23 10:51:32] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/157 variables, 34/34 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/157 variables, 17/51 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/157 variables, 0/51 constraints. Problems are: Problem set: 0 solved, 99 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 3/160 variables, 10/61 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/160 variables, 0/61 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 5 (OVERLAPS) 102/262 variables, 160/221 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:34] [INFO ] Deduced a trap composed of 14 places in 71 ms of which 8 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:34] [INFO ] Deduced a trap composed of 15 places in 68 ms of which 8 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:34] [INFO ] Deduced a trap composed of 10 places in 48 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/262 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:34] [INFO ] Deduced a trap composed of 5 places in 25 ms of which 2 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:35] [INFO ] Deduced a trap composed of 15 places in 68 ms of which 7 ms to minimize.
At refinement iteration 7 (INCLUDED_ONLY) 0/262 variables, 2/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/262 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 9 (OVERLAPS) 0/262 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
No progress, stopping.
After SMT solving in domain Real declared 262/262 variables, and 226 constraints, problems are : Problem set: 0 solved, 99 unsolved in 5529 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 constraints, PredecessorRefiner: 99/99 constraints, Known Traps: 5/5 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/157 variables, 34/34 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/157 variables, 17/51 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/157 variables, 4/55 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/157 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 4 (OVERLAPS) 3/160 variables, 10/65 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/160 variables, 1/66 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/160 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 7 (OVERLAPS) 102/262 variables, 160/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/262 variables, 99/325 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:41] [INFO ] Deduced a trap composed of 13 places in 63 ms of which 7 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/262 variables, 1/326 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:51:48] [INFO ] Deduced a trap composed of 18 places in 70 ms of which 7 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/262 variables, 1/327 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Reachability property qltransition_16 is true.
At refinement iteration 11 (INCLUDED_ONLY) 0/262 variables, 0/327 constraints. Problems are: Problem set: 0 solved, 99 unsolved
SDD proceeding with computation,14 properties remain. new max is 65536
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 262/262 variables, and 327 constraints, problems are : Problem set: 0 solved, 99 unsolved in 30012 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 constraints, PredecessorRefiner: 99/99 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 35571ms problems are : Problem set: 0 solved, 99 unsolved
Search for dead transitions found 0 dead transitions in 35572ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 36031 ms. Remains : 160/160 places, 102/102 transitions.
Attempting over-approximation, by ignoring read arcs.
Applied a total of 0 rules in 9 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Running SMT prover for 1 properties.
[2026-05-23 10:52:07] [INFO ] Invariant cache hit.
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
SDD size :1.90427e+14 after 1.94413e+14
[2026-05-23 10:52:07] [INFO ] [Real]Absence check using 34 positive place invariants in 17 ms returned sat
[2026-05-23 10:52:07] [INFO ] [Real]Absence check using 34 positive and 27 generalized place invariants in 36 ms returned sat
[2026-05-23 10:52:08] [INFO ] After 184ms 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
[2026-05-23 10:52:08] [INFO ] [Nat]Absence check using 34 positive place invariants in 11 ms returned sat
[2026-05-23 10:52:08] [INFO ] [Nat]Absence check using 34 positive and 27 generalized place invariants in 16 ms returned sat
[2026-05-23 10:52:08] [INFO ] After 89ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:52:08] [INFO ] Deduced a trap composed of 13 places in 75 ms of which 8 ms to minimize.
[2026-05-23 10:52:08] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 93 ms
TRAPS : Iteration 1
[2026-05-23 10:52:08] [INFO ] After 208ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 10:52:08] [INFO ] After 303ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 520 ms.
RANDOM walk for 40000 steps (1781 resets) in 194 ms. (205 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (381 resets) in 79 ms. (500 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1400171 steps, run timeout after 3001 ms. (steps per millisecond=466 ) properties seen :0 out of 1
Probabilistic random walk after 1400171 steps, saw 180510 distinct states, run finished after 3001 ms. (steps per millisecond=466 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:52:11] [INFO ] Computed 62 invariants in 3 ms
[2026-05-23 10:52:11] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 197 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 4/265 variables, 4/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 228 constraints, problems are : Problem set: 0 solved, 1 unsolved in 265 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 477ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 111 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 161 transition count 102
Applied a total of 1 rules in 13 ms. Remains 161 /162 variables (removed 1) and now considering 102/103 (removed 1) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 14 ms. Remains : 161/162 places, 102/103 transitions.
RANDOM walk for 40000 steps (1908 resets) in 155 ms. (256 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (362 resets) in 78 ms. (506 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1385735 steps, run timeout after 3001 ms. (steps per millisecond=461 ) properties seen :0 out of 1
Probabilistic random walk after 1385735 steps, saw 178610 distinct states, run finished after 3005 ms. (steps per millisecond=461 ) properties seen :0
// Phase 1: matrix 102 rows 161 cols
[2026-05-23 10:52:15] [INFO ] Computed 62 invariants in 2 ms
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) 69/70 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/70 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 35/105 variables, 23/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/105 variables, 0/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 37/142 variables, 19/51 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/142 variables, 0/51 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/149 variables, 7/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/149 variables, 0/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 97/246 variables, 149/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/246 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 15/261 variables, 10/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/261 variables, 4/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/261 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 2/263 variables, 2/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/263 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 0/263 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 263/263 variables, and 223 constraints, problems are : Problem set: 0 solved, 1 unsolved in 188 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 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) 69/70 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/70 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 35/105 variables, 23/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:52:15] [INFO ] Deduced a trap composed of 10 places in 40 ms of which 2 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/105 variables, 1/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/105 variables, 0/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 37/142 variables, 19/52 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/142 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 7/149 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/149 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 97/246 variables, 149/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/246 variables, 1/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/246 variables, 0/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 15/261 variables, 10/219 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/261 variables, 4/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:52:15] [INFO ] Deduced a trap composed of 5 places in 47 ms of which 4 ms to minimize.
At refinement iteration 15 (INCLUDED_ONLY) 0/261 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 2/263 variables, 2/226 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/263 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/263 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 263/263 variables, and 226 constraints, problems are : Problem set: 0 solved, 1 unsolved in 347 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 2/2 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 541ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 144 ms.
Support contains 1 out of 161 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 161/161 places, 102/102 transitions.
Applied a total of 0 rules in 6 ms. Remains 161 /161 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 7 ms. Remains : 161/161 places, 102/102 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 161/161 places, 102/102 transitions.
Applied a total of 0 rules in 5 ms. Remains 161 /161 variables (removed 0) and now considering 102/102 (removed 0) transitions.
[2026-05-23 10:52:15] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:52:15] [INFO ] Implicit Places using invariants in 172 ms returned []
[2026-05-23 10:52:15] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:52:16] [INFO ] Implicit Places using invariants and state equation in 425 ms returned []
Implicit Place search using SMT with State Equation took 601 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:52:16] [INFO ] Redundant transitions in 2 ms returned []
Running 99 sub problems to find dead transitions.
[2026-05-23 10:52:16] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/158 variables, 34/34 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/158 variables, 25/59 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/158 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 3 (OVERLAPS) 3/161 variables, 3/62 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/161 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 5 (OVERLAPS) 102/263 variables, 161/223 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:52:18] [INFO ] Deduced a trap composed of 13 places in 67 ms of which 8 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/263 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/263 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:52:21] [INFO ] Deduced a trap composed of 15 places in 51 ms of which 6 ms to minimize.
At refinement iteration 8 (OVERLAPS) 0/263 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/263 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:52:23] [INFO ] Deduced a trap composed of 5 places in 32 ms of which 2 ms to minimize.
At refinement iteration 10 (OVERLAPS) 0/263 variables, 1/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/263 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 12 (OVERLAPS) 0/263 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
No progress, stopping.
After SMT solving in domain Real declared 263/263 variables, and 226 constraints, problems are : Problem set: 0 solved, 99 unsolved in 10303 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 constraints, PredecessorRefiner: 99/99 constraints, Known Traps: 3/3 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/158 variables, 34/34 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/158 variables, 25/59 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/158 variables, 3/62 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 4 (OVERLAPS) 3/161 variables, 3/65 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/161 variables, 0/65 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 6 (OVERLAPS) 102/263 variables, 161/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/263 variables, 99/325 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/263 variables, 0/325 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 9 (OVERLAPS) 0/263 variables, 0/325 constraints. Problems are: Problem set: 0 solved, 99 unsolved
No progress, stopping.
After SMT solving in domain Int declared 263/263 variables, and 325 constraints, problems are : Problem set: 0 solved, 99 unsolved in 23634 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 constraints, PredecessorRefiner: 99/99 constraints, Known Traps: 3/3 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 33955ms problems are : Problem set: 0 solved, 99 unsolved
Search for dead transitions found 0 dead transitions in 33955ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 34575 ms. Remains : 161/161 places, 102/102 transitions.
Attempting over-approximation, by ignoring read arcs.
Applied a total of 0 rules in 6 ms. Remains 161 /161 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Running SMT prover for 1 properties.
[2026-05-23 10:52:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 10:52:50] [INFO ] [Real]Absence check using 34 positive place invariants in 10 ms returned sat
[2026-05-23 10:52:50] [INFO ] [Real]Absence check using 34 positive and 28 generalized place invariants in 18 ms returned sat
[2026-05-23 10:52:50] [INFO ] After 85ms SMT Verify possible using state equation in real domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 10:52:50] [INFO ] After 99ms SMT Verify possible using trap constraints in real domain returned unsat :0 sat :1
[2026-05-23 10:52:50] [INFO ] After 195ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 208 ms.
RANDOM walk for 40000 steps (1843 resets) in 186 ms. (213 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40002 steps (379 resets) in 79 ms. (500 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1473254 steps, run timeout after 3001 ms. (steps per millisecond=490 ) properties seen :0 out of 1
Probabilistic random walk after 1473254 steps, saw 189416 distinct states, run finished after 3001 ms. (steps per millisecond=490 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:52:53] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 10:52:53] [INFO ] State equation strengthened by 3 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) 21/22 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/22 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 43/65 variables, 4/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/134 variables, 0/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 24/158 variables, 23/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 208 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 21/22 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/22 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 43/65 variables, 4/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/134 variables, 0/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 24/158 variables, 23/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 4/265 variables, 4/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 228 constraints, problems are : Problem set: 0 solved, 1 unsolved in 204 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 423ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 60 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 161 transition count 102
Applied a total of 1 rules in 9 ms. Remains 161 /162 variables (removed 1) and now considering 102/103 (removed 1) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 9 ms. Remains : 161/162 places, 102/103 transitions.
RANDOM walk for 40000 steps (1914 resets) in 119 ms. (333 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (370 resets) in 50 ms. (784 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1467903 steps, run timeout after 3001 ms. (steps per millisecond=489 ) properties seen :0 out of 1
Probabilistic random walk after 1467903 steps, saw 188754 distinct states, run finished after 3001 ms. (steps per millisecond=489 ) properties seen :0
// Phase 1: matrix 102 rows 161 cols
[2026-05-23 10:52:57] [INFO ] Computed 62 invariants in 1 ms
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) 21/22 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/22 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 42/64 variables, 4/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/64 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 43/107 variables, 21/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/107 variables, 0/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 33/140 variables, 23/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/140 variables, 0/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (OVERLAPS) 9/149 variables, 9/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/149 variables, 0/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 97/246 variables, 149/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/246 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 15/261 variables, 10/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/261 variables, 4/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/261 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 2/263 variables, 2/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/263 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 0/263 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 263/263 variables, and 223 constraints, problems are : Problem set: 0 solved, 1 unsolved in 188 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 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) 21/22 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/22 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 42/64 variables, 4/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/64 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 43/107 variables, 21/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/107 variables, 0/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 33/140 variables, 23/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/140 variables, 0/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 9/149 variables, 9/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/149 variables, 0/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 97/246 variables, 149/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/246 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 15/261 variables, 10/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/261 variables, 4/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/261 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/261 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 2/263 variables, 2/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/263 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/263 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 263/263 variables, and 224 constraints, problems are : Problem set: 0 solved, 1 unsolved in 223 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 420ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 73 ms.
Support contains 1 out of 161 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 161/161 places, 102/102 transitions.
Applied a total of 0 rules in 5 ms. Remains 161 /161 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 5 ms. Remains : 161/161 places, 102/102 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 161/161 places, 102/102 transitions.
Applied a total of 0 rules in 4 ms. Remains 161 /161 variables (removed 0) and now considering 102/102 (removed 0) transitions.
[2026-05-23 10:52:57] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:52:57] [INFO ] Implicit Places using invariants in 173 ms returned []
[2026-05-23 10:52:57] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:52:58] [INFO ] Implicit Places using invariants and state equation in 361 ms returned [12]
Discarding 1 places :
Implicit Place search using SMT with State Equation took 536 ms to find 1 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 1 : 160/161 places, 102/102 transitions.
Applied a total of 0 rules in 6 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 2 iterations and 548 ms. Remains : 160/161 places, 102/102 transitions.
RANDOM walk for 40000 steps (1934 resets) in 114 ms. (347 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (392 resets) in 56 ms. (701 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1458158 steps, run timeout after 3001 ms. (steps per millisecond=485 ) properties seen :0 out of 1
Probabilistic random walk after 1458158 steps, saw 187517 distinct states, run finished after 3001 ms. (steps per millisecond=485 ) properties seen :0
// Phase 1: matrix 102 rows 160 cols
[2026-05-23 10:53:01] [INFO ] Computed 61 invariants in 2 ms
Starting Z3 with timeout 75.0 s and query timeout 7500.0 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) 21/22 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/22 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 59/81 variables, 9/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/81 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 35/116 variables, 23/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/116 variables, 0/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 25/141 variables, 17/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/141 variables, 0/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 7/148 variables, 7/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/148 variables, 0/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 97/245 variables, 148/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/245 variables, 0/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 15/260 variables, 10/215 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/260 variables, 4/219 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/260 variables, 0/219 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 2/262 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/262 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 0/262 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 262/262 variables, and 221 constraints, problems are : Problem set: 0 solved, 1 unsolved in 168 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 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 75.0 s and query timeout 7500.0 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) 21/22 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/22 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 59/81 variables, 9/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/81 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 35/116 variables, 23/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/116 variables, 0/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 25/141 variables, 17/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/141 variables, 0/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 7/148 variables, 7/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/148 variables, 0/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 97/245 variables, 148/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/245 variables, 0/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 15/260 variables, 10/215 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/260 variables, 4/219 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/260 variables, 1/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/260 variables, 0/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 2/262 variables, 2/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/262 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/262 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 262/262 variables, and 222 constraints, problems are : Problem set: 0 solved, 1 unsolved in 222 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 430ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 44 ms.
Support contains 1 out of 160 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 160/160 places, 102/102 transitions.
Applied a total of 0 rules in 4 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 6 ms. Remains : 160/160 places, 102/102 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 160/160 places, 102/102 transitions.
Applied a total of 0 rules in 4 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
[2026-05-23 10:53:01] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:53:01] [INFO ] Implicit Places using invariants in 205 ms returned []
[2026-05-23 10:53:02] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:53:02] [INFO ] Implicit Places using invariants and state equation in 296 ms returned []
Implicit Place search using SMT with State Equation took 518 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:53:02] [INFO ] Redundant transitions in 2 ms returned []
Running 99 sub problems to find dead transitions.
[2026-05-23 10:53:02] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/157 variables, 34/34 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/157 variables, 17/51 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/157 variables, 0/51 constraints. Problems are: Problem set: 0 solved, 99 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 3/160 variables, 10/61 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/160 variables, 0/61 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 5 (OVERLAPS) 102/262 variables, 160/221 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:04] [INFO ] Deduced a trap composed of 14 places in 68 ms of which 8 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:04] [INFO ] Deduced a trap composed of 15 places in 71 ms of which 9 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:04] [INFO ] Deduced a trap composed of 10 places in 50 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/262 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:05] [INFO ] Deduced a trap composed of 5 places in 26 ms of which 2 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:05] [INFO ] Deduced a trap composed of 15 places in 70 ms of which 7 ms to minimize.
At refinement iteration 7 (INCLUDED_ONLY) 0/262 variables, 2/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/262 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 9 (OVERLAPS) 0/262 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
No progress, stopping.
After SMT solving in domain Real declared 262/262 variables, and 226 constraints, problems are : Problem set: 0 solved, 99 unsolved in 5792 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 constraints, PredecessorRefiner: 99/99 constraints, Known Traps: 5/5 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/157 variables, 34/34 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/157 variables, 17/51 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/157 variables, 4/55 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/157 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 4 (OVERLAPS) 3/160 variables, 10/65 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/160 variables, 1/66 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/160 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 7 (OVERLAPS) 102/262 variables, 160/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/262 variables, 99/325 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:11] [INFO ] Deduced a trap composed of 13 places in 83 ms of which 7 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/262 variables, 1/326 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:18] [INFO ] Deduced a trap composed of 18 places in 71 ms of which 7 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/262 variables, 1/327 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Reachability property qltransition_116 is true.
Reachability property qltransition_87 is true.
At refinement iteration 11 (INCLUDED_ONLY) 0/262 variables, 0/327 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Error getting values : (error "ParserException while parsing response: ((s0 1)
(s1 0)
(s2 0)
(s3 0)
(s4 0)
(s5 0)
(s6 0)
(s7 0)
(s8 0)
(s9 0)
(s10 0)
(s11 0)
(s12 0)
(s13 0)
(s14 0)
(s15 0)
(s16 0)
(s17 0)
(s18 1)
(s19 0)
(s20 0)
(s21 0)
(s22 0)
(s23 1)
(s24 0)
(s25 0)
(s26 0)
(s27 0)
(s28 0)
(s29 0)
(s30 0)
(s31 0)
(s32 0)
(s33 0)
(s34 timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 262/262 variables, and 327 constraints, problems are : Problem set: 0 solved, 99 unsolved in 30015 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 constraints, PredecessorRefiner: 99/99 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 35838ms problems are : Problem set: 0 solved, 99 unsolved
Search for dead transitions found 0 dead transitions in 35839ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 36370 ms. Remains : 160/160 places, 102/102 transitions.
Attempting over-approximation, by ignoring read arcs.
Applied a total of 0 rules in 4 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Running SMT prover for 1 properties.
[2026-05-23 10:53:38] [INFO ] Invariant cache hit.
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 10:53:38] [INFO ] [Real]Absence check using 34 positive place invariants in 16 ms returned sat
[2026-05-23 10:53:38] [INFO ] [Real]Absence check using 34 positive and 27 generalized place invariants in 24 ms returned sat
[2026-05-23 10:53:38] [INFO ] After 114ms 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
[2026-05-23 10:53:38] [INFO ] [Nat]Absence check using 34 positive place invariants in 11 ms returned sat
[2026-05-23 10:53:38] [INFO ] [Nat]Absence check using 34 positive and 27 generalized place invariants in 15 ms returned sat
[2026-05-23 10:53:38] [INFO ] After 81ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 10:53:38] [INFO ] After 97ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 10:53:38] [INFO ] After 193ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 316 ms.
RANDOM walk for 40000 steps (1800 resets) in 137 ms. (289 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (399 resets) in 81 ms. (487 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1386691 steps, run timeout after 3001 ms. (steps per millisecond=462 ) properties seen :0 out of 1
Probabilistic random walk after 1386691 steps, saw 178729 distinct states, run finished after 3001 ms. (steps per millisecond=462 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:53:41] [INFO ] Computed 62 invariants in 2 ms
[2026-05-23 10:53:41] [INFO ] State equation strengthened by 3 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) 64/65 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:41] [INFO ] Deduced a trap composed of 13 places in 35 ms of which 3 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/134 variables, 1/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/134 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (OVERLAPS) 24/158 variables, 23/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 4/265 variables, 4/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 228 constraints, problems are : Problem set: 0 solved, 1 unsolved in 284 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 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) 64/65 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/134 variables, 1/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/134 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 24/158 variables, 23/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 453 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 756ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 100 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 161 transition count 102
Applied a total of 1 rules in 9 ms. Remains 161 /162 variables (removed 1) and now considering 102/103 (removed 1) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 9 ms. Remains : 161/162 places, 102/103 transitions.
RANDOM walk for 40000 steps (1947 resets) in 141 ms. (281 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40002 steps (383 resets) in 63 ms. (625 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1415061 steps, run timeout after 3001 ms. (steps per millisecond=471 ) properties seen :0 out of 1
Probabilistic random walk after 1415061 steps, saw 182287 distinct states, run finished after 3001 ms. (steps per millisecond=471 ) properties seen :0
// Phase 1: matrix 102 rows 161 cols
[2026-05-23 10:53:45] [INFO ] Computed 62 invariants in 1 ms
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) 63/64 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/64 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 43/107 variables, 21/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/107 variables, 0/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 33/140 variables, 23/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/140 variables, 0/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 9/149 variables, 9/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/149 variables, 0/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 97/246 variables, 149/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/246 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 15/261 variables, 10/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/261 variables, 4/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/261 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 2/263 variables, 2/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/263 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 0/263 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 263/263 variables, and 223 constraints, problems are : Problem set: 0 solved, 1 unsolved in 192 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 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) 63/64 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/64 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 43/107 variables, 21/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/107 variables, 0/26 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 33/140 variables, 23/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/140 variables, 0/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 9/149 variables, 9/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/149 variables, 0/58 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 97/246 variables, 149/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/246 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/246 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 15/261 variables, 10/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/261 variables, 4/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/261 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 2/263 variables, 2/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/263 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 0/263 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 263/263 variables, and 224 constraints, problems are : Problem set: 0 solved, 1 unsolved in 224 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 161/161 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 424ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 64 ms.
Support contains 1 out of 161 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 161/161 places, 102/102 transitions.
Applied a total of 0 rules in 4 ms. Remains 161 /161 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 4 ms. Remains : 161/161 places, 102/102 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 161/161 places, 102/102 transitions.
Applied a total of 0 rules in 4 ms. Remains 161 /161 variables (removed 0) and now considering 102/102 (removed 0) transitions.
[2026-05-23 10:53:45] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:53:46] [INFO ] Implicit Places using invariants in 175 ms returned []
[2026-05-23 10:53:46] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:53:46] [INFO ] Implicit Places using invariants and state equation in 331 ms returned [12]
Discarding 1 places :
Implicit Place search using SMT with State Equation took 509 ms to find 1 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 1 : 160/161 places, 102/102 transitions.
Applied a total of 0 rules in 6 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 2 iterations and 520 ms. Remains : 160/161 places, 102/102 transitions.
RANDOM walk for 40000 steps (1888 resets) in 187 ms. (212 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (389 resets) in 61 ms. (645 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1393655 steps, run timeout after 3001 ms. (steps per millisecond=464 ) properties seen :0 out of 1
Probabilistic random walk after 1393655 steps, saw 179700 distinct states, run finished after 3001 ms. (steps per millisecond=464 ) properties seen :0
// Phase 1: matrix 102 rows 160 cols
[2026-05-23 10:53:49] [INFO ] Computed 61 invariants in 1 ms
Starting Z3 with timeout 75.0 s and query timeout 7500.0 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) 80/81 variables, 10/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/81 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 35/116 variables, 23/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/116 variables, 0/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/141 variables, 17/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/141 variables, 0/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/148 variables, 7/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/148 variables, 0/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 97/245 variables, 148/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/245 variables, 0/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 15/260 variables, 10/215 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/260 variables, 4/219 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/260 variables, 0/219 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 2/262 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/262 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 0/262 variables, 0/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 262/262 variables, and 221 constraints, problems are : Problem set: 0 solved, 1 unsolved in 178 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 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 75.0 s and query timeout 7500.0 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) 80/81 variables, 10/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/81 variables, 0/10 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 35/116 variables, 23/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/116 variables, 0/33 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/141 variables, 17/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/141 variables, 0/50 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/148 variables, 7/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/148 variables, 0/57 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 97/245 variables, 148/205 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/245 variables, 1/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/245 variables, 0/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 15/260 variables, 10/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/260 variables, 4/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/260 variables, 0/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 2/262 variables, 2/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/262 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 0/262 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 262/262 variables, and 222 constraints, problems are : Problem set: 0 solved, 1 unsolved in 233 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 418ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 74 ms.
Support contains 1 out of 160 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 160/160 places, 102/102 transitions.
Applied a total of 0 rules in 4 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 4 ms. Remains : 160/160 places, 102/102 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 160/160 places, 102/102 transitions.
Applied a total of 0 rules in 4 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
[2026-05-23 10:53:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:53:50] [INFO ] Implicit Places using invariants in 219 ms returned []
[2026-05-23 10:53:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:53:50] [INFO ] Implicit Places using invariants and state equation in 359 ms returned []
Implicit Place search using SMT with State Equation took 586 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:53:50] [INFO ] Redundant transitions in 2 ms returned []
Running 99 sub problems to find dead transitions.
[2026-05-23 10:53:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/157 variables, 34/34 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/157 variables, 17/51 constraints. Problems are: Problem set: 0 solved, 99 unsolved
SDD proceeding with computation,12 properties remain. new max is 65536
At refinement iteration 2 (INCLUDED_ONLY) 0/157 variables, 0/51 constraints. Problems are: Problem set: 0 solved, 99 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 3/160 variables, 10/61 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/160 variables, 0/61 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 5 (OVERLAPS) 102/262 variables, 160/221 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:52] [INFO ] Deduced a trap composed of 14 places in 72 ms of which 9 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:52] [INFO ] Deduced a trap composed of 15 places in 69 ms of which 9 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:53] [INFO ] Deduced a trap composed of 10 places in 50 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/262 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:53] [INFO ] Deduced a trap composed of 5 places in 25 ms of which 2 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:53:53] [INFO ] Deduced a trap composed of 15 places in 71 ms of which 6 ms to minimize.
At refinement iteration 7 (INCLUDED_ONLY) 0/262 variables, 2/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/262 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
SDD size :1.94413e+14 after 2.38217e+14
At refinement iteration 9 (OVERLAPS) 0/262 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
No progress, stopping.
After SMT solving in domain Real declared 262/262 variables, and 226 constraints, problems are : Problem set: 0 solved, 99 unsolved in 5900 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 constraints, PredecessorRefiner: 99/99 constraints, Known Traps: 5/5 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/157 variables, 34/34 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/157 variables, 17/51 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/157 variables, 4/55 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/157 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 4 (OVERLAPS) 3/160 variables, 10/65 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/160 variables, 1/66 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/160 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 7 (OVERLAPS) 102/262 variables, 160/226 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/262 variables, 99/325 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:00] [INFO ] Deduced a trap composed of 13 places in 66 ms of which 6 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/262 variables, 1/326 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:06] [INFO ] Deduced a trap composed of 18 places in 70 ms of which 6 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/262 variables, 1/327 constraints. Problems are: Problem set: 0 solved, 99 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/262 variables, 0/327 constraints. Problems are: Problem set: 0 solved, 99 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 262/262 variables, and 327 constraints, problems are : Problem set: 0 solved, 99 unsolved in 30021 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 27/27 constraints, State Equation: 160/160 constraints, PredecessorRefiner: 99/99 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 35935ms problems are : Problem set: 0 solved, 99 unsolved
Search for dead transitions found 0 dead transitions in 35935ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 36534 ms. Remains : 160/160 places, 102/102 transitions.
Attempting over-approximation, by ignoring read arcs.
Applied a total of 0 rules in 3 ms. Remains 160 /160 variables (removed 0) and now considering 102/102 (removed 0) transitions.
Running SMT prover for 1 properties.
[2026-05-23 10:54:26] [INFO ] Invariant cache hit.
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 10:54:26] [INFO ] [Real]Absence check using 34 positive place invariants in 12 ms returned sat
[2026-05-23 10:54:26] [INFO ] [Real]Absence check using 34 positive and 27 generalized place invariants in 20 ms returned sat
[2026-05-23 10:54:26] [INFO ] After 97ms 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
[2026-05-23 10:54:26] [INFO ] [Nat]Absence check using 34 positive place invariants in 11 ms returned sat
[2026-05-23 10:54:26] [INFO ] [Nat]Absence check using 34 positive and 27 generalized place invariants in 16 ms returned sat
[2026-05-23 10:54:26] [INFO ] After 87ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:26] [INFO ] Deduced a trap composed of 5 places in 50 ms of which 4 ms to minimize.
[2026-05-23 10:54:26] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 65 ms
TRAPS : Iteration 1
[2026-05-23 10:54:26] [INFO ] After 173ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 10:54:26] [INFO ] After 262ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 369 ms.
RANDOM walk for 40000 steps (1828 resets) in 152 ms. (261 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (348 resets) in 55 ms. (714 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1463899 steps, run timeout after 3001 ms. (steps per millisecond=487 ) properties seen :0 out of 1
Probabilistic random walk after 1463899 steps, saw 188214 distinct states, run finished after 3001 ms. (steps per millisecond=487 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:54:30] [INFO ] Computed 62 invariants in 2 ms
[2026-05-23 10:54:30] [INFO ] State equation strengthened by 3 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) 64/65 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:30] [INFO ] Deduced a trap composed of 13 places in 32 ms of which 3 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/134 variables, 1/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/134 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (OVERLAPS) 24/158 variables, 23/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 4/265 variables, 4/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 228 constraints, problems are : Problem set: 0 solved, 1 unsolved in 214 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 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) 64/65 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/134 variables, 1/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/134 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 24/158 variables, 23/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 190 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 410ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 87 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.4 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 18 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 20 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1942 resets) in 109 ms. (363 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (394 resets) in 48 ms. (816 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1491510 steps, run timeout after 3001 ms. (steps per millisecond=497 ) properties seen :0 out of 1
Probabilistic random walk after 1491510 steps, saw 191569 distinct states, run finished after 3001 ms. (steps per millisecond=497 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:54:33] [INFO ] Computed 59 invariants in 1 ms
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) 47/48 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/48 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 44/92 variables, 22/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/92 variables, 0/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 34/126 variables, 23/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/126 variables, 0/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 9/135 variables, 9/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 164 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 47/48 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/48 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 44/92 variables, 22/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/92 variables, 0/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 34/126 variables, 23/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/126 variables, 0/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 9/135 variables, 9/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 1/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 0/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 14/235 variables, 8/199 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 3/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 0/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 14/249 variables, 5/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 9/258 variables, 9/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 217 constraints, problems are : Problem set: 0 solved, 1 unsolved in 276 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 461ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 65 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 3 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 10:54:34] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:54:34] [INFO ] Implicit Places using invariants in 192 ms returned []
[2026-05-23 10:54:34] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:54:34] [INFO ] Implicit Places using invariants and state equation in 326 ms returned []
Implicit Place search using SMT with State Equation took 525 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:54:34] [INFO ] Redundant transitions in 1 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 10:54:34] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:36] [INFO ] Deduced a trap composed of 14 places in 80 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:36] [INFO ] Deduced a trap composed of 13 places in 62 ms of which 6 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:36] [INFO ] Deduced a trap composed of 15 places in 49 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:38] [INFO ] Deduced a trap composed of 10 places in 56 ms of which 5 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:38] [INFO ] Deduced a trap composed of 18 places in 92 ms of which 10 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:42] [INFO ] Deduced a trap composed of 17 places in 65 ms of which 7 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:54:44] [INFO ] Deduced a trap composed of 5 places in 59 ms of which 4 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 12572 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Reachability property qltransition_86 is true.
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Reachability property qltransition_15 is true.
SDD proceeding with computation,10 properties remain. new max is 65536
SDD size :2.38217e+14 after 3.07138e+14
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (OVERLAPS) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30009 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 42594ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 42595ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 43131 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 5 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:55:17] [INFO ] Computed 59 invariants in 2 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 10:55:17] [INFO ] [Real]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 10:55:17] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 11 ms returned sat
[2026-05-23 10:55:17] [INFO ] After 84ms 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
[2026-05-23 10:55:17] [INFO ] [Nat]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 10:55:17] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 11 ms returned sat
[2026-05-23 10:55:17] [INFO ] After 78ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:55:17] [INFO ] Deduced a trap composed of 5 places in 53 ms of which 2 ms to minimize.
[2026-05-23 10:55:17] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 69 ms
TRAPS : Iteration 1
[2026-05-23 10:55:17] [INFO ] After 169ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 10:55:17] [INFO ] After 265ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 370 ms.
RANDOM walk for 4 steps (0 resets) in 5 ms. (0 steps per ms) remains 0/1 properties
RANDOM walk for 40000 steps (1831 resets) in 316 ms. (126 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40001 steps (383 resets) in 95 ms. (416 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1350108 steps, run timeout after 3001 ms. (steps per millisecond=449 ) properties seen :0 out of 1
Probabilistic random walk after 1350108 steps, saw 173897 distinct states, run finished after 3001 ms. (steps per millisecond=449 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:55:20] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 10:55:20] [INFO ] State equation strengthened by 3 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) 64/65 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:55:20] [INFO ] Deduced a trap composed of 13 places in 43 ms of which 3 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/134 variables, 1/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/134 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (OVERLAPS) 24/158 variables, 23/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 4/265 variables, 4/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 228 constraints, problems are : Problem set: 0 solved, 1 unsolved in 266 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 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) 64/65 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/134 variables, 1/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/134 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 24/158 variables, 23/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 193 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 484ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 77 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.1 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 11 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 11 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1950 resets) in 167 ms. (238 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (377 resets) in 84 ms. (470 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1382873 steps, run timeout after 3001 ms. (steps per millisecond=460 ) properties seen :0 out of 1
Probabilistic random walk after 1382873 steps, saw 178248 distinct states, run finished after 3001 ms. (steps per millisecond=460 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:55:24] [INFO ] Computed 59 invariants in 1 ms
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) 47/48 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/48 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 44/92 variables, 22/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/92 variables, 0/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 34/126 variables, 23/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/126 variables, 0/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 9/135 variables, 9/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 191 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 47/48 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/48 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 44/92 variables, 22/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/92 variables, 0/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 34/126 variables, 23/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/126 variables, 0/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 9/135 variables, 9/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 1/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 0/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 14/235 variables, 8/199 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 3/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 0/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 14/249 variables, 5/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 9/258 variables, 9/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 217 constraints, problems are : Problem set: 0 solved, 1 unsolved in 304 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 502ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 56 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 3 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 10:55:25] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:55:25] [INFO ] Implicit Places using invariants in 170 ms returned []
[2026-05-23 10:55:25] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:55:25] [INFO ] Implicit Places using invariants and state equation in 322 ms returned []
Implicit Place search using SMT with State Equation took 494 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:55:25] [INFO ] Redundant transitions in 0 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 10:55:25] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:55:27] [INFO ] Deduced a trap composed of 14 places in 67 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:55:27] [INFO ] Deduced a trap composed of 13 places in 69 ms of which 6 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:55:27] [INFO ] Deduced a trap composed of 15 places in 54 ms of which 4 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:55:29] [INFO ] Deduced a trap composed of 10 places in 56 ms of which 4 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:55:29] [INFO ] Deduced a trap composed of 18 places in 90 ms of which 10 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:55:30] [INFO ] Deduced a trap composed of 17 places in 71 ms of which 6 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:55:32] [INFO ] Deduced a trap composed of 5 places in 62 ms of which 5 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Detected timeout of ITS tools.
[2026-05-23 10:55:33] [INFO ] Flatten gal took : 44 ms
[2026-05-23 10:55:33] [INFO ] Applying decomposition
[2026-05-23 10:55:33] [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/graph7766021152663846977.txt' '-o' '/tmp/graph7766021152663846977.bin' '-w' '/tmp/graph7766021152663846977.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202505121319/bin/louvain-linux64' '/tmp/graph7766021152663846977.bin' '-l' '-1' '-v' '-w' '/tmp/graph7766021152663846977.weights' '-q' '0' '-e' '0.001'
[2026-05-23 10:55:34] [INFO ] Decomposing Gal with order
[2026-05-23 10:55:34] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-23 10:55:34] [INFO ] Removed a total of 132 redundant transitions.
[2026-05-23 10:55:34] [INFO ] Flatten gal took : 121 ms
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
[2026-05-23 10:55:34] [INFO ] Fuse similar labels procedure discarded/fused a total of 54 labels/synchronizations in 18 ms.
[2026-05-23 10:55:34] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality16544782225366718107.gal : 9 ms
[2026-05-23 10:55:34] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality3334030307232078180.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/ReachabilityCardinality16544782225366718107.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality3334030307232078180.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/ReachabilityCardinality3334030307232078180.prop.
SDD proceeding with computation,10 properties remain. new max is 4
SDD size :2 after 3
SDD proceeding with computation,10 properties remain. new max is 8
SDD size :3 after 18
SDD proceeding with computation,10 properties remain. new max is 16
SDD size :18 after 1953
SDD proceeding with computation,10 properties remain. new max is 32
SDD size :1953 after 618833
SDD proceeding with computation,10 properties remain. new max is 64
SDD size :618833 after 1.80246e+08
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 10569 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
SDD proceeding with computation,10 properties remain. new max is 128
SDD size :9.37096e+12 after 9.41077e+12
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
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\_mod\_flat,8.12601e+14,22.2295,417128,14029,591,953032,1691,434,754300,213,7185,0
Total reachable state count : 812601289449327

Verifying 10 reachability properties.
Reachability property qltransition_0 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_0,3504,22.3693,416512,84,99,953032,1691,441,754300,216,7185,50
Reachability property qltransition_14 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_14,4896,22.3838,416512,88,113,953032,1691,446,754300,218,7185,50
Reachability property qltransition_82 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_82,1.15061e+06,22.3851,416512,146,152,953032,1691,457,754300,221,7185,54
Reachability property qltransition_83 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_83,8.43202e+06,22.386,416512,186,195,953032,1691,467,754300,223,7185,58
Reachability property qltransition_84 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_84,5.69134e+07,22.3873,416512,267,214,953032,1691,475,754300,224,7185,84
Reachability property qltransition_85 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_85,6.4714e+07,22.3885,416512,270,229,953032,1691,483,754300,225,7185,87
Reachability property qltransition_112 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_112,6.33491e+08,22.3901,416512,444,256,953032,1691,487,754300,226,7185,87
Reachability property qltransition_113 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_113,7.72656e+08,22.3914,416512,456,265,953032,1691,491,754300,228,7185,87
Reachability property qltransition_114 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_114,7.76319e+08,22.3928,416512,456,258,953032,1691,494,754300,229,7185,87
Reachability property qltransition_115 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
qltransition\_115,7.76319e+08,22.3942,416512,453,254,953032,1691,497,754300,230,7185,87
ITS tools runner thread asked to quit. Dying gracefully.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (OVERLAPS) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30012 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 40593ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 40593ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 41097 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 6 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:56:06] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 10:56:06] [INFO ] [Real]Absence check using 35 positive place invariants in 16 ms returned sat
[2026-05-23 10:56:06] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 15 ms returned sat
[2026-05-23 10:56:06] [INFO ] After 99ms 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
[2026-05-23 10:56:06] [INFO ] [Nat]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 10:56:06] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 12 ms returned sat
[2026-05-23 10:56:06] [INFO ] After 89ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 10:56:06] [INFO ] After 103ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 10:56:06] [INFO ] After 193ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 305 ms.
RANDOM walk for 40000 steps (1865 resets) in 137 ms. (289 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (390 resets) in 55 ms. (714 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1512897 steps, run timeout after 3001 ms. (steps per millisecond=504 ) properties seen :0 out of 1
Probabilistic random walk after 1512897 steps, saw 194046 distinct states, run finished after 3004 ms. (steps per millisecond=503 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:56:09] [INFO ] Computed 62 invariants in 2 ms
[2026-05-23 10:56:09] [INFO ] State equation strengthened by 3 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) 64/65 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:09] [INFO ] Deduced a trap composed of 13 places in 33 ms of which 3 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/134 variables, 1/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/134 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (OVERLAPS) 24/158 variables, 23/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 4/265 variables, 4/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 228 constraints, problems are : Problem set: 0 solved, 1 unsolved in 209 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 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) 64/65 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/65 variables, 0/5 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 69/134 variables, 34/39 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/134 variables, 1/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/134 variables, 0/40 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 24/158 variables, 23/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 188 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 403ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 59 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.0 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 8 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 8 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1951 resets) in 163 ms. (243 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (383 resets) in 56 ms. (701 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1508165 steps, run timeout after 3001 ms. (steps per millisecond=502 ) properties seen :0 out of 1
Probabilistic random walk after 1508165 steps, saw 193500 distinct states, run finished after 3001 ms. (steps per millisecond=502 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:56:13] [INFO ] Computed 59 invariants in 2 ms
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) 47/48 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/48 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 44/92 variables, 22/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/92 variables, 0/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 34/126 variables, 23/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/126 variables, 0/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 9/135 variables, 9/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 190 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 47/48 variables, 1/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/48 variables, 0/1 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 44/92 variables, 22/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/92 variables, 0/23 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 34/126 variables, 23/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/126 variables, 0/46 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 9/135 variables, 9/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 1/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 0/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 14/235 variables, 8/199 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 3/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 0/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 14/249 variables, 5/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 9/258 variables, 9/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 217 constraints, problems are : Problem set: 0 solved, 1 unsolved in 222 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 419ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 39 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 3 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 2 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 10:56:13] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:56:13] [INFO ] Implicit Places using invariants in 201 ms returned []
[2026-05-23 10:56:13] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:56:14] [INFO ] Implicit Places using invariants and state equation in 325 ms returned []
Implicit Place search using SMT with State Equation took 528 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:56:14] [INFO ] Redundant transitions in 1 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 10:56:14] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:15] [INFO ] Deduced a trap composed of 14 places in 61 ms of which 6 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:15] [INFO ] Deduced a trap composed of 13 places in 62 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:16] [INFO ] Deduced a trap composed of 15 places in 46 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:17] [INFO ] Deduced a trap composed of 10 places in 51 ms of which 5 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:17] [INFO ] Deduced a trap composed of 18 places in 73 ms of which 9 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:18] [INFO ] Deduced a trap composed of 17 places in 64 ms of which 6 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:20] [INFO ] Deduced a trap composed of 5 places in 58 ms of which 5 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 9604 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (OVERLAPS) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30007 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 39622ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 39623ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 40162 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 6 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:56:53] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 10:56:53] [INFO ] [Real]Absence check using 35 positive place invariants in 9 ms returned sat
[2026-05-23 10:56:53] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 16 ms returned sat
[2026-05-23 10:56:53] [INFO ] After 88ms 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
[2026-05-23 10:56:53] [INFO ] [Nat]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 10:56:53] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 13 ms returned sat
[2026-05-23 10:56:53] [INFO ] After 78ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:53] [INFO ] Deduced a trap composed of 6 places in 31 ms of which 2 ms to minimize.
[2026-05-23 10:56:53] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 46 ms
TRAPS : Iteration 1
[2026-05-23 10:56:53] [INFO ] After 144ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 10:56:53] [INFO ] After 227ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 328 ms.
RANDOM walk for 40000 steps (1827 resets) in 115 ms. (344 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (392 resets) in 48 ms. (816 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1507316 steps, run timeout after 3001 ms. (steps per millisecond=502 ) properties seen :0 out of 1
Probabilistic random walk after 1507316 steps, saw 193419 distinct states, run finished after 3001 ms. (steps per millisecond=502 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:56:57] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 10:56:57] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 173 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:57] [INFO ] Deduced a trap composed of 13 places in 51 ms of which 7 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 1/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/128 variables, 0/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 30/158 variables, 19/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:56:57] [INFO ] Deduced a trap composed of 14 places in 53 ms of which 7 ms to minimize.
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 1/226 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/261 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 4/265 variables, 4/230 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 230 constraints, problems are : Problem set: 0 solved, 1 unsolved in 328 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 2/2 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 506ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 114 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.0 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 8 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 8 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1889 resets) in 126 ms. (314 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (372 resets) in 55 ms. (714 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1501166 steps, run timeout after 3001 ms. (steps per millisecond=500 ) properties seen :0 out of 1
Probabilistic random walk after 1501166 steps, saw 192702 distinct states, run finished after 3001 ms. (steps per millisecond=500 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:57:00] [INFO ] Computed 59 invariants in 1 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 165 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 1/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 0/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 14/235 variables, 8/199 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 3/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 0/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 14/249 variables, 5/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 9/258 variables, 9/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 217 constraints, problems are : Problem set: 0 solved, 1 unsolved in 219 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 401ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 93 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 6 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 6 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 2 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 10:57:01] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:57:01] [INFO ] Implicit Places using invariants in 204 ms returned []
[2026-05-23 10:57:01] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:57:01] [INFO ] Implicit Places using invariants and state equation in 321 ms returned []
Implicit Place search using SMT with State Equation took 527 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:57:01] [INFO ] Redundant transitions in 0 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 10:57:01] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:03] [INFO ] Deduced a trap composed of 14 places in 65 ms of which 6 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:03] [INFO ] Deduced a trap composed of 13 places in 59 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:03] [INFO ] Deduced a trap composed of 15 places in 45 ms of which 2 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:05] [INFO ] Deduced a trap composed of 10 places in 57 ms of which 5 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:05] [INFO ] Deduced a trap composed of 18 places in 70 ms of which 9 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:06] [INFO ] Deduced a trap composed of 17 places in 65 ms of which 7 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:08] [INFO ] Deduced a trap composed of 5 places in 55 ms of which 5 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 9972 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (OVERLAPS) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30009 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 39991ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 39991ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 40531 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 6 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:57:41] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 10:57:41] [INFO ] [Real]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 10:57:41] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 12 ms returned sat
[2026-05-23 10:57:41] [INFO ] After 70ms 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
[2026-05-23 10:57:41] [INFO ] [Nat]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 10:57:41] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 11 ms returned sat
[2026-05-23 10:57:41] [INFO ] After 76ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 10:57:41] [INFO ] After 88ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 10:57:41] [INFO ] After 168ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 249 ms.
RANDOM walk for 5425 steps (257 resets) in 17 ms. (301 steps per ms) remains 0/1 properties
RANDOM walk for 392 steps (16 resets) in 8 ms. (43 steps per ms) remains 0/1 properties
RANDOM walk for 40000 steps (1874 resets) in 121 ms. (327 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (390 resets) in 57 ms. (689 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1548344 steps, run timeout after 3001 ms. (steps per millisecond=515 ) properties seen :0 out of 1
Probabilistic random walk after 1548344 steps, saw 199804 distinct states, run finished after 3001 ms. (steps per millisecond=515 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:57:45] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 10:57:45] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 178 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:45] [INFO ] Deduced a trap composed of 18 places in 82 ms of which 9 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:45] [INFO ] Deduced a trap composed of 20 places in 89 ms of which 14 ms to minimize.
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 1/230 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 230 constraints, problems are : Problem set: 0 solved, 1 unsolved in 418 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 2/2 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 602ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 183 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.0 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 12 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 12 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1946 resets) in 118 ms. (336 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (382 resets) in 52 ms. (754 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1289669 steps, run timeout after 3001 ms. (steps per millisecond=429 ) properties seen :0 out of 1
Probabilistic random walk after 1289669 steps, saw 166549 distinct states, run finished after 3001 ms. (steps per millisecond=429 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:57:48] [INFO ] Computed 59 invariants in 1 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 162 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 1/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 0/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 14/235 variables, 8/199 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 3/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 0/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 14/249 variables, 5/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 9/258 variables, 9/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 217 constraints, problems are : Problem set: 0 solved, 1 unsolved in 218 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 386ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 91 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 3 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 2 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 10:57:49] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:57:49] [INFO ] Implicit Places using invariants in 215 ms returned []
[2026-05-23 10:57:49] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:57:50] [INFO ] Implicit Places using invariants and state equation in 474 ms returned []
Implicit Place search using SMT with State Equation took 697 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:57:50] [INFO ] Redundant transitions in 1 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 10:57:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:51] [INFO ] Deduced a trap composed of 14 places in 59 ms of which 5 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:51] [INFO ] Deduced a trap composed of 13 places in 57 ms of which 6 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:52] [INFO ] Deduced a trap composed of 15 places in 43 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:53] [INFO ] Deduced a trap composed of 10 places in 50 ms of which 4 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:53] [INFO ] Deduced a trap composed of 18 places in 68 ms of which 9 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:54] [INFO ] Deduced a trap composed of 17 places in 63 ms of which 5 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:57:56] [INFO ] Deduced a trap composed of 5 places in 53 ms of which 4 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 9126 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (OVERLAPS) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30011 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 39162ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 39163ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 39882 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 6 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:58:29] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 10:58:29] [INFO ] [Real]Absence check using 35 positive place invariants in 11 ms returned sat
[2026-05-23 10:58:29] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 20 ms returned sat
[2026-05-23 10:58:29] [INFO ] After 136ms 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
[2026-05-23 10:58:29] [INFO ] [Nat]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 10:58:29] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 12 ms returned sat
[2026-05-23 10:58:29] [INFO ] After 74ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 10:58:29] [INFO ] After 86ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 10:58:29] [INFO ] After 166ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 312 ms.
RANDOM walk for 40000 steps (1879 resets) in 121 ms. (327 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (377 resets) in 71 ms. (555 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1466049 steps, run timeout after 3001 ms. (steps per millisecond=488 ) properties seen :0 out of 1
Probabilistic random walk after 1466049 steps, saw 188518 distinct states, run finished after 3001 ms. (steps per millisecond=488 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:58:32] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 10:58:32] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 185 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:58:32] [INFO ] Deduced a trap composed of 13 places in 61 ms of which 7 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 1/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/128 variables, 0/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 30/158 variables, 19/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 343 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 534ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 137 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.1 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 10 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 11 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1951 resets) in 119 ms. (333 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (377 resets) in 58 ms. (678 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1330676 steps, run timeout after 3001 ms. (steps per millisecond=443 ) properties seen :0 out of 1
Probabilistic random walk after 1330676 steps, saw 171568 distinct states, run finished after 3006 ms. (steps per millisecond=442 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:58:36] [INFO ] Computed 59 invariants in 1 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 168 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 1/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 0/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 14/235 variables, 8/199 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 3/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 0/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 14/249 variables, 5/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 9/258 variables, 9/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 217 constraints, problems are : Problem set: 0 solved, 1 unsolved in 307 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 481ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 120 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 3 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 2 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 10:58:37] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:58:37] [INFO ] Implicit Places using invariants in 260 ms returned []
[2026-05-23 10:58:37] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:58:37] [INFO ] Implicit Places using invariants and state equation in 374 ms returned []
Implicit Place search using SMT with State Equation took 636 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:58:37] [INFO ] Redundant transitions in 0 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 10:58:37] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:58:39] [INFO ] Deduced a trap composed of 14 places in 67 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:58:39] [INFO ] Deduced a trap composed of 13 places in 60 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:58:39] [INFO ] Deduced a trap composed of 15 places in 50 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:58:41] [INFO ] Deduced a trap composed of 10 places in 52 ms of which 4 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:58:41] [INFO ] Deduced a trap composed of 18 places in 76 ms of which 10 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:58:42] [INFO ] Deduced a trap composed of 17 places in 94 ms of which 9 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:58:45] [INFO ] Deduced a trap composed of 5 places in 74 ms of which 7 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 12289 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
(s36 0timeout
^^^^^^^^
(error "Invalid token: 0timeout")
Error getting values : (error "ParserException while parsing response: ((s0 0)
(s1 0)
(s2 0)
(s3 0)
(s4 0)
(s5 0)
(s6 0)
(s7 0)
(s8 1)
(s9 0)
(s10 0)
(s11 0)
(s12 0)
(s13 0)
(s14 0)
(s15 0)
(s16 0)
(s17 1)
(s18 0)
(s19 0)
(s20 0)
(s21 0)
(s22 1)
(s23 0)
(s24 0)
(s25 0)
(s26 0)
(s27 0)
(s28 0)
(s29 0)
(s30 0)
(s31 0)
(s32 0)
(s33 0)
(s34 0)
(s35 0)
(s36 0timeout
org.smtlib.IParser$ParserException: Unbalanced parentheses at end of input")
Error getting values : (error "Error writing to Z3 solver: java.io.IOException: Stream closed")
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30020 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 42321ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 42322ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 42969 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 5 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:59:19] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 10:59:20] [INFO ] [Real]Absence check using 35 positive place invariants in 12 ms returned sat
[2026-05-23 10:59:20] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 13 ms returned sat
[2026-05-23 10:59:20] [INFO ] After 92ms 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
[2026-05-23 10:59:20] [INFO ] [Nat]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 10:59:20] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 12 ms returned sat
[2026-05-23 10:59:20] [INFO ] After 75ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 10:59:20] [INFO ] After 89ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 10:59:20] [INFO ] After 174ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 278 ms.
RANDOM walk for 40000 steps (1863 resets) in 138 ms. (287 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (382 resets) in 62 ms. (634 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1501322 steps, run timeout after 3001 ms. (steps per millisecond=500 ) properties seen :0 out of 1
Probabilistic random walk after 1501322 steps, saw 192727 distinct states, run finished after 3001 ms. (steps per millisecond=500 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 10:59:23] [INFO ] Computed 62 invariants in 2 ms
[2026-05-23 10:59:23] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 178 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:23] [INFO ] Deduced a trap composed of 13 places in 46 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:23] [INFO ] Deduced a trap composed of 14 places in 52 ms of which 7 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 2/45 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/128 variables, 0/45 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 30/158 variables, 19/64 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/64 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/222 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/226 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/226 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/230 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/230 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 230 constraints, problems are : Problem set: 0 solved, 1 unsolved in 307 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 2/2 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 491ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 79 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.0 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 9 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 9 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1946 resets) in 150 ms. (264 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (384 resets) in 72 ms. (548 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1421062 steps, run timeout after 3001 ms. (steps per millisecond=473 ) properties seen :0 out of 1
Probabilistic random walk after 1421062 steps, saw 182991 distinct states, run finished after 3004 ms. (steps per millisecond=473 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 10:59:26] [INFO ] Computed 59 invariants in 1 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 161 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:27] [INFO ] Deduced a trap composed of 13 places in 29 ms of which 2 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 1/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/103 variables, 0/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 25/128 variables, 17/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/128 variables, 0/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 7/135 variables, 7/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/135 variables, 0/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 86/221 variables, 135/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 1/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/221 variables, 0/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 14/235 variables, 8/200 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 3/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/235 variables, 0/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 14/249 variables, 5/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 1/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/249 variables, 0/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 9/258 variables, 9/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 218 constraints, problems are : Problem set: 0 solved, 1 unsolved in 266 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 433ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 63 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 2 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 2 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 2 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 10:59:27] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:59:27] [INFO ] Implicit Places using invariants in 196 ms returned []
[2026-05-23 10:59:27] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 10:59:27] [INFO ] Implicit Places using invariants and state equation in 312 ms returned []
Implicit Place search using SMT with State Equation took 513 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 10:59:28] [INFO ] Redundant transitions in 0 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 10:59:28] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:30] [INFO ] Deduced a trap composed of 14 places in 61 ms of which 6 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:30] [INFO ] Deduced a trap composed of 13 places in 60 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:30] [INFO ] Deduced a trap composed of 15 places in 48 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:32] [INFO ] Deduced a trap composed of 10 places in 72 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:32] [INFO ] Deduced a trap composed of 18 places in 100 ms of which 13 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:33] [INFO ] Deduced a trap composed of 17 places in 68 ms of which 6 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 10:59:35] [INFO ] Deduced a trap composed of 5 places in 56 ms of which 5 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 10404 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (OVERLAPS) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30009 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 40427ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 40428ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 40951 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 5 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:00:08] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 11:00:08] [INFO ] [Real]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 11:00:08] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 13 ms returned sat
[2026-05-23 11:00:08] [INFO ] After 81ms 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
[2026-05-23 11:00:08] [INFO ] [Nat]Absence check using 35 positive place invariants in 12 ms returned sat
[2026-05-23 11:00:08] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 13 ms returned sat
[2026-05-23 11:00:08] [INFO ] After 78ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 11:00:08] [INFO ] After 90ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 11:00:08] [INFO ] After 178ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 271 ms.
RANDOM walk for 40000 steps (1835 resets) in 105 ms. (377 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (363 resets) in 47 ms. (833 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1493131 steps, run timeout after 3001 ms. (steps per millisecond=497 ) properties seen :0 out of 1
Probabilistic random walk after 1493131 steps, saw 191772 distinct states, run finished after 3001 ms. (steps per millisecond=497 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 11:00:11] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 11:00:11] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 168 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:00:12] [INFO ] Deduced a trap composed of 13 places in 49 ms of which 7 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 1/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/128 variables, 0/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 30/158 variables, 19/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 261 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 436ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 66 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.0 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 7 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 8 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1928 resets) in 100 ms. (396 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (377 resets) in 50 ms. (784 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1509173 steps, run timeout after 3001 ms. (steps per millisecond=502 ) properties seen :0 out of 1
Probabilistic random walk after 1509173 steps, saw 193622 distinct states, run finished after 3001 ms. (steps per millisecond=502 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:00:15] [INFO ] Computed 59 invariants in 1 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 160 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:00:15] [INFO ] Deduced a trap composed of 13 places in 41 ms of which 3 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 1/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/103 variables, 0/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 25/128 variables, 17/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/128 variables, 0/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 7/135 variables, 7/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/135 variables, 0/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 86/221 variables, 135/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 1/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/221 variables, 0/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 14/235 variables, 8/200 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 3/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/235 variables, 0/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 14/249 variables, 5/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 1/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/249 variables, 0/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 9/258 variables, 9/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 218 constraints, problems are : Problem set: 0 solved, 1 unsolved in 349 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 517ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 82 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 4 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 11:00:15] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:00:16] [INFO ] Implicit Places using invariants in 216 ms returned []
[2026-05-23 11:00:16] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:00:16] [INFO ] Implicit Places using invariants and state equation in 307 ms returned []
Implicit Place search using SMT with State Equation took 528 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 11:00:16] [INFO ] Redundant transitions in 0 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 11:00:16] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:00:18] [INFO ] Deduced a trap composed of 14 places in 59 ms of which 6 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:00:18] [INFO ] Deduced a trap composed of 13 places in 59 ms of which 6 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:00:18] [INFO ] Deduced a trap composed of 15 places in 45 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:00:20] [INFO ] Deduced a trap composed of 10 places in 59 ms of which 4 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:00:20] [INFO ] Deduced a trap composed of 18 places in 70 ms of which 9 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:00:20] [INFO ] Deduced a trap composed of 17 places in 60 ms of which 5 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:00:22] [INFO ] Deduced a trap composed of 5 places in 54 ms of which 4 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 9336 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (OVERLAPS) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30008 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 39353ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 39353ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 39891 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 5 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:00:55] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 11:00:55] [INFO ] [Real]Absence check using 35 positive place invariants in 11 ms returned sat
[2026-05-23 11:00:55] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 13 ms returned sat
[2026-05-23 11:00:55] [INFO ] After 87ms 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
[2026-05-23 11:00:55] [INFO ] [Nat]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 11:00:55] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 13 ms returned sat
[2026-05-23 11:00:56] [INFO ] After 78ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 11:00:56] [INFO ] After 91ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 11:00:56] [INFO ] After 175ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 271 ms.
RANDOM walk for 40000 steps (1852 resets) in 111 ms. (357 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (376 resets) in 47 ms. (833 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1544297 steps, run timeout after 3001 ms. (steps per millisecond=514 ) properties seen :0 out of 1
Probabilistic random walk after 1544297 steps, saw 199159 distinct states, run finished after 3001 ms. (steps per millisecond=514 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 11:00:59] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 11:00:59] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 162 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 4/265 variables, 4/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 228 constraints, problems are : Problem set: 0 solved, 1 unsolved in 205 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 372ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 53 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.0 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 5 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 5 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1908 resets) in 96 ms. (412 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (352 resets) in 43 ms. (909 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1549121 steps, run timeout after 3001 ms. (steps per millisecond=516 ) properties seen :0 out of 1
Probabilistic random walk after 1549121 steps, saw 199931 distinct states, run finished after 3001 ms. (steps per millisecond=516 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:01:02] [INFO ] Computed 59 invariants in 1 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 156 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:02] [INFO ] Deduced a trap composed of 13 places in 28 ms of which 2 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 1/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/103 variables, 0/32 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 25/128 variables, 17/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/128 variables, 0/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 7/135 variables, 7/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/135 variables, 0/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 86/221 variables, 135/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 1/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/221 variables, 0/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 14/235 variables, 8/200 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 3/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/235 variables, 0/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 14/249 variables, 5/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 1/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/249 variables, 0/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 9/258 variables, 9/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 218 constraints, problems are : Problem set: 0 solved, 1 unsolved in 242 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 402ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 44 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 1 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 1 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 11:01:03] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:01:03] [INFO ] Implicit Places using invariants in 213 ms returned []
[2026-05-23 11:01:03] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:01:03] [INFO ] Implicit Places using invariants and state equation in 314 ms returned []
Implicit Place search using SMT with State Equation took 531 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 11:01:03] [INFO ] Redundant transitions in 0 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 11:01:03] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:05] [INFO ] Deduced a trap composed of 14 places in 57 ms of which 6 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:05] [INFO ] Deduced a trap composed of 13 places in 57 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:05] [INFO ] Deduced a trap composed of 15 places in 45 ms of which 3 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:07] [INFO ] Deduced a trap composed of 10 places in 48 ms of which 4 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:07] [INFO ] Deduced a trap composed of 18 places in 68 ms of which 9 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:08] [INFO ] Deduced a trap composed of 17 places in 61 ms of which 6 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:09] [INFO ] Deduced a trap composed of 5 places in 52 ms of which 5 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 9467 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30008 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 39485ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 39486ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 40024 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:01:43] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 11:01:43] [INFO ] [Real]Absence check using 35 positive place invariants in 7 ms returned sat
[2026-05-23 11:01:43] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 9 ms returned sat
[2026-05-23 11:01:43] [INFO ] After 61ms 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
[2026-05-23 11:01:43] [INFO ] [Nat]Absence check using 35 positive place invariants in 9 ms returned sat
[2026-05-23 11:01:43] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 11 ms returned sat
[2026-05-23 11:01:43] [INFO ] After 117ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 11:01:43] [INFO ] After 129ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 11:01:43] [INFO ] After 202ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 272 ms.
RANDOM walk for 40000 steps (1813 resets) in 107 ms. (370 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (367 resets) in 44 ms. (888 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1464017 steps, run timeout after 3001 ms. (steps per millisecond=487 ) properties seen :0 out of 1
Probabilistic random walk after 1464017 steps, saw 188225 distinct states, run finished after 3001 ms. (steps per millisecond=487 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 11:01:46] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 11:01:46] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 193 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:46] [INFO ] Deduced a trap composed of 12 places in 55 ms of which 7 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 1/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/128 variables, 0/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 30/158 variables, 19/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 359 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 558ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 161 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.0 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 9 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 9 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1927 resets) in 176 ms. (225 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (384 resets) in 71 ms. (555 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1429392 steps, run timeout after 3001 ms. (steps per millisecond=476 ) properties seen :0 out of 1
Probabilistic random walk after 1429392 steps, saw 184041 distinct states, run finished after 3005 ms. (steps per millisecond=475 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:01:50] [INFO ] Computed 59 invariants in 1 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 176 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 1/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:50] [INFO ] Deduced a trap composed of 10 places in 61 ms of which 5 ms to minimize.
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 1/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/221 variables, 0/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 14/235 variables, 8/200 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 3/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/235 variables, 0/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 14/249 variables, 5/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 1/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/249 variables, 0/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 9/258 variables, 9/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 218 constraints, problems are : Problem set: 0 solved, 1 unsolved in 368 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 559ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 137 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 3 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 11:01:50] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:01:51] [INFO ] Implicit Places using invariants in 290 ms returned []
[2026-05-23 11:01:51] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:01:51] [INFO ] Implicit Places using invariants and state equation in 428 ms returned []
Implicit Place search using SMT with State Equation took 720 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 11:01:51] [INFO ] Redundant transitions in 0 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 11:01:51] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:54] [INFO ] Deduced a trap composed of 14 places in 94 ms of which 10 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:54] [INFO ] Deduced a trap composed of 13 places in 84 ms of which 9 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:54] [INFO ] Deduced a trap composed of 15 places in 67 ms of which 4 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:57] [INFO ] Deduced a trap composed of 10 places in 76 ms of which 8 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:57] [INFO ] Deduced a trap composed of 18 places in 119 ms of which 15 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:01:58] [INFO ] Deduced a trap composed of 17 places in 103 ms of which 10 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:01] [INFO ] Deduced a trap composed of 5 places in 78 ms of which 7 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 14953 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30009 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 44977ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 44978ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 45708 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 7 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:02:36] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 11:02:36] [INFO ] [Real]Absence check using 35 positive place invariants in 11 ms returned sat
[2026-05-23 11:02:36] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 13 ms returned sat
[2026-05-23 11:02:36] [INFO ] After 74ms 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
[2026-05-23 11:02:36] [INFO ] [Nat]Absence check using 35 positive place invariants in 11 ms returned sat
[2026-05-23 11:02:36] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 13 ms returned sat
[2026-05-23 11:02:36] [INFO ] After 87ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:36] [INFO ] Deduced a trap composed of 5 places in 36 ms of which 2 ms to minimize.
[2026-05-23 11:02:36] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 52 ms
TRAPS : Iteration 1
[2026-05-23 11:02:36] [INFO ] After 160ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 11:02:36] [INFO ] After 245ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 330 ms.
RANDOM walk for 4 steps (0 resets) in 4 ms. (0 steps per ms) remains 0/1 properties
RANDOM walk for 40000 steps (1832 resets) in 155 ms. (256 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (377 resets) in 85 ms. (465 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1371328 steps, run timeout after 3001 ms. (steps per millisecond=456 ) properties seen :0 out of 1
Probabilistic random walk after 1371328 steps, saw 176731 distinct states, run finished after 3001 ms. (steps per millisecond=456 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 11:02:40] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 11:02:40] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 143 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:40] [INFO ] Deduced a trap composed of 11 places in 34 ms of which 3 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 1/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/128 variables, 0/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 30/158 variables, 19/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 235 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 388ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 94 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.0 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 8 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 8 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1910 resets) in 174 ms. (228 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (385 resets) in 70 ms. (563 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1386485 steps, run timeout after 3001 ms. (steps per millisecond=462 ) properties seen :0 out of 1
Probabilistic random walk after 1386485 steps, saw 178710 distinct states, run finished after 3001 ms. (steps per millisecond=462 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:02:43] [INFO ] Computed 59 invariants in 0 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 217 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 1/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 0/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 14/235 variables, 8/199 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 3/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 0/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 14/249 variables, 5/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 9/258 variables, 9/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 217 constraints, problems are : Problem set: 0 solved, 1 unsolved in 232 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 454ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 109 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 4 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 11:02:44] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:02:44] [INFO ] Implicit Places using invariants in 275 ms returned []
[2026-05-23 11:02:44] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:02:44] [INFO ] Implicit Places using invariants and state equation in 440 ms returned []
Implicit Place search using SMT with State Equation took 716 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 11:02:44] [INFO ] Redundant transitions in 1 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 11:02:44] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:47] [INFO ] Deduced a trap composed of 14 places in 82 ms of which 10 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:47] [INFO ] Deduced a trap composed of 13 places in 91 ms of which 9 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:48] [INFO ] Deduced a trap composed of 15 places in 62 ms of which 4 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:50] [INFO ] Deduced a trap composed of 10 places in 71 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:50] [INFO ] Deduced a trap composed of 18 places in 116 ms of which 15 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:52] [INFO ] Deduced a trap composed of 17 places in 89 ms of which 9 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:02:54] [INFO ] Deduced a trap composed of 5 places in 79 ms of which 7 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 14909 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30014 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 44939ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 44939ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 45665 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 4 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:03:29] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 11:03:29] [INFO ] [Real]Absence check using 35 positive place invariants in 11 ms returned sat
[2026-05-23 11:03:29] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 15 ms returned sat
[2026-05-23 11:03:29] [INFO ] After 81ms 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
[2026-05-23 11:03:29] [INFO ] [Nat]Absence check using 35 positive place invariants in 12 ms returned sat
[2026-05-23 11:03:29] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 14 ms returned sat
[2026-05-23 11:03:30] [INFO ] After 93ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 11:03:30] [INFO ] After 108ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 11:03:30] [INFO ] After 199ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 289 ms.
RANDOM walk for 40000 steps (1880 resets) in 145 ms. (273 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (385 resets) in 56 ms. (701 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1497461 steps, run timeout after 3001 ms. (steps per millisecond=498 ) properties seen :0 out of 1
Probabilistic random walk after 1497461 steps, saw 192232 distinct states, run finished after 3001 ms. (steps per millisecond=498 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 11:03:33] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 11:03:33] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 152 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:03:33] [INFO ] Deduced a trap composed of 11 places in 34 ms of which 3 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 1/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/128 variables, 0/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 30/158 variables, 19/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 283 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 441ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 117 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.0 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 8 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 8 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1916 resets) in 171 ms. (232 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (376 resets) in 70 ms. (563 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1342122 steps, run timeout after 3001 ms. (steps per millisecond=447 ) properties seen :0 out of 1
Probabilistic random walk after 1342122 steps, saw 172937 distinct states, run finished after 3001 ms. (steps per millisecond=447 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:03:36] [INFO ] Computed 59 invariants in 1 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 186 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 1/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 0/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 14/235 variables, 8/199 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 3/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 0/202 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (OVERLAPS) 14/249 variables, 5/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 1/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 0/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (OVERLAPS) 9/258 variables, 9/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (INCLUDED_ONLY) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (OVERLAPS) 0/258 variables, 0/217 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 217 constraints, problems are : Problem set: 0 solved, 1 unsolved in 317 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 507ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 93 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 2 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 5 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 11:03:37] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:03:37] [INFO ] Implicit Places using invariants in 287 ms returned []
[2026-05-23 11:03:37] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:03:38] [INFO ] Implicit Places using invariants and state equation in 424 ms returned []
Implicit Place search using SMT with State Equation took 713 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 11:03:38] [INFO ] Redundant transitions in 0 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 11:03:38] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:03:40] [INFO ] Deduced a trap composed of 14 places in 85 ms of which 10 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:03:41] [INFO ] Deduced a trap composed of 13 places in 90 ms of which 10 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:03:41] [INFO ] Deduced a trap composed of 15 places in 64 ms of which 4 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:03:43] [INFO ] Deduced a trap composed of 10 places in 72 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:03:44] [INFO ] Deduced a trap composed of 18 places in 102 ms of which 15 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:03:45] [INFO ] Deduced a trap composed of 17 places in 92 ms of which 10 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:03:48] [INFO ] Deduced a trap composed of 5 places in 77 ms of which 7 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 14740 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30009 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 44762ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 44762ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 45485 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 4 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:04:22] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 11:04:22] [INFO ] [Real]Absence check using 35 positive place invariants in 11 ms returned sat
[2026-05-23 11:04:23] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 14 ms returned sat
[2026-05-23 11:04:23] [INFO ] After 77ms 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
[2026-05-23 11:04:23] [INFO ] [Nat]Absence check using 35 positive place invariants in 11 ms returned sat
[2026-05-23 11:04:23] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 14 ms returned sat
[2026-05-23 11:04:23] [INFO ] After 91ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 11:04:23] [INFO ] After 105ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 11:04:23] [INFO ] After 192ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 276 ms.
RANDOM walk for 40000 steps (1833 resets) in 144 ms. (275 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40002 steps (375 resets) in 52 ms. (754 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1514119 steps, run timeout after 3001 ms. (steps per millisecond=504 ) properties seen :0 out of 1
Probabilistic random walk after 1514119 steps, saw 194171 distinct states, run finished after 3001 ms. (steps per millisecond=504 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 11:04:26] [INFO ] Computed 62 invariants in 1 ms
[2026-05-23 11:04:26] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 138 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:04:26] [INFO ] Deduced a trap composed of 12 places in 42 ms of which 4 ms to minimize.
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 1/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/128 variables, 0/44 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (OVERLAPS) 30/158 variables, 19/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/158 variables, 0/63 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 103/261 variables, 158/221 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 3/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 1/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/261 variables, 0/225 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 4/265 variables, 4/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 0/265 variables, 0/229 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 229 constraints, problems are : Problem set: 0 solved, 1 unsolved in 253 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 394ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 67 ms.
Support contains 1 out of 162 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 162/162 places, 103/103 transitions.
Graph (complete) has 546 edges and 162 vertex of which 158 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.4 ms
Discarding 4 places :
Also discarding 1 output transitions
Drop transitions (Output transitions of discarded places.) removed 1 transitions
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 2 place count 158 transition count 102
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 157 transition count 101
Applied a total of 3 rules in 10 ms. Remains 157 /162 variables (removed 5) and now considering 101/103 (removed 2) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 10 ms. Remains : 157/162 places, 101/103 transitions.
RANDOM walk for 40000 steps (1880 resets) in 118 ms. (336 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40003 steps (385 resets) in 47 ms. (833 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1466301 steps, run timeout after 3001 ms. (steps per millisecond=488 ) properties seen :0 out of 1
Probabilistic random walk after 1466301 steps, saw 188550 distinct states, run finished after 3001 ms. (steps per millisecond=488 ) properties seen :0
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:04:29] [INFO ] Computed 59 invariants in 1 ms
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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 0/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 7/135 variables, 7/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/135 variables, 0/55 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 9 (OVERLAPS) 86/221 variables, 135/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/221 variables, 0/190 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 14/235 variables, 8/198 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/235 variables, 3/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/235 variables, 0/201 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (OVERLAPS) 14/249 variables, 5/206 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/249 variables, 1/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/249 variables, 0/207 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 9/258 variables, 9/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 0/258 variables, 0/216 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 216 constraints, problems are : Problem set: 0 solved, 1 unsolved in 172 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 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) 65/66 variables, 7/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/66 variables, 0/7 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 37/103 variables, 24/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/103 variables, 0/31 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 25/128 variables, 17/48 constraints. Problems are: Problem set: 0 solved, 1 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:04:30] [INFO ] Deduced a trap composed of 13 places in 71 ms of which 8 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/128 variables, 1/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/128 variables, 0/49 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (OVERLAPS) 7/135 variables, 7/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/135 variables, 0/56 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 86/221 variables, 135/191 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/221 variables, 1/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/221 variables, 0/192 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 14/235 variables, 8/200 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/235 variables, 3/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/235 variables, 0/203 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 16 (OVERLAPS) 14/249 variables, 5/208 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 17 (INCLUDED_ONLY) 0/249 variables, 1/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 18 (INCLUDED_ONLY) 0/249 variables, 0/209 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 19 (OVERLAPS) 9/258 variables, 9/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 20 (INCLUDED_ONLY) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 21 (OVERLAPS) 0/258 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 258/258 variables, and 218 constraints, problems are : Problem set: 0 solved, 1 unsolved in 404 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 1/1 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 585ms problems are : Problem set: 0 solved, 1 unsolved
Parikh walk visited 0 properties in 74 ms.
Support contains 1 out of 157 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 3 ms. Remains : 157/157 places, 101/101 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 157/157 places, 101/101 transitions.
Applied a total of 0 rules in 3 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
[2026-05-23 11:04:30] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:04:30] [INFO ] Implicit Places using invariants in 280 ms returned []
[2026-05-23 11:04:30] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-23 11:04:31] [INFO ] Implicit Places using invariants and state equation in 422 ms returned []
Implicit Place search using SMT with State Equation took 709 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-23 11:04:31] [INFO ] Redundant transitions in 1 ms returned []
Running 98 sub problems to find dead transitions.
[2026-05-23 11:04:31] [INFO ] Invariant cache hit.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 2/156 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/156 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (OVERLAPS) 101/257 variables, 156/215 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:04:34] [INFO ] Deduced a trap composed of 14 places in 84 ms of which 9 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:04:34] [INFO ] Deduced a trap composed of 13 places in 87 ms of which 10 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:04:34] [INFO ] Deduced a trap composed of 15 places in 63 ms of which 4 ms to minimize.
At refinement iteration 6 (INCLUDED_ONLY) 0/257 variables, 3/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 0/218 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (OVERLAPS) 1/258 variables, 1/219 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:04:37] [INFO ] Deduced a trap composed of 10 places in 71 ms of which 7 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:04:37] [INFO ] Deduced a trap composed of 18 places in 99 ms of which 15 ms to minimize.
At refinement iteration 9 (INCLUDED_ONLY) 0/258 variables, 2/221 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:04:38] [INFO ] Deduced a trap composed of 17 places in 91 ms of which 10 ms to minimize.
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 1/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/258 variables, 0/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-23 11:04:41] [INFO ] Deduced a trap composed of 5 places in 77 ms of which 7 ms to minimize.
At refinement iteration 12 (OVERLAPS) 0/258 variables, 1/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 14 (OVERLAPS) 0/258 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 98 unsolved
No progress, stopping.
After SMT solving in domain Real declared 258/258 variables, and 223 constraints, problems are : Problem set: 0 solved, 98 unsolved in 14782 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 98 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/154 variables, 35/35 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/154 variables, 17/52 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/154 variables, 7/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/154 variables, 0/59 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 4 (OVERLAPS) 2/156 variables, 7/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/156 variables, 0/66 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 6 (OVERLAPS) 101/257 variables, 156/222 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/257 variables, 98/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/257 variables, 0/320 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 9 (OVERLAPS) 1/258 variables, 1/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/258 variables, 0/321 constraints. Problems are: Problem set: 0 solved, 98 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 258/258 variables, and 321 constraints, problems are : Problem set: 0 solved, 98 unsolved in 30011 ms.
Refiners :[Positive P Invariants (semi-flows): 35/35 constraints, Generalized P Invariants (flows): 24/24 constraints, State Equation: 157/157 constraints, PredecessorRefiner: 98/98 constraints, Known Traps: 7/7 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 44807ms problems are : Problem set: 0 solved, 98 unsolved
Search for dead transitions found 0 dead transitions in 44809ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 45529 ms. Remains : 157/157 places, 101/101 transitions.
Attempting over-approximation, by ignoring read arcs.
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 0 with 1 rules applied. Total rules applied 1 place count 157 transition count 101
Applied a total of 1 rules in 4 ms. Remains 157 /157 variables (removed 0) and now considering 101/101 (removed 0) transitions.
Running SMT prover for 1 properties.
// Phase 1: matrix 101 rows 157 cols
[2026-05-23 11:05:16] [INFO ] Computed 59 invariants in 1 ms
Starting Z3 with timeout 450.0 s and query timeout 45000.0 ms
[2026-05-23 11:05:16] [INFO ] [Real]Absence check using 35 positive place invariants in 10 ms returned sat
[2026-05-23 11:05:16] [INFO ] [Real]Absence check using 35 positive and 24 generalized place invariants in 12 ms returned sat
[2026-05-23 11:05:16] [INFO ] After 90ms 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
[2026-05-23 11:05:16] [INFO ] [Nat]Absence check using 35 positive place invariants in 9 ms returned sat
[2026-05-23 11:05:16] [INFO ] [Nat]Absence check using 35 positive and 24 generalized place invariants in 12 ms returned sat
[2026-05-23 11:05:16] [INFO ] After 77ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :1
TRAPS : Iteration 0
[2026-05-23 11:05:16] [INFO ] After 90ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :1
[2026-05-23 11:05:16] [INFO ] After 165ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :1
Over-approximation ignoring read arcs solved 0 properties in 264 ms.
RANDOM walk for 40000 steps (1839 resets) in 109 ms. (363 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40004 steps (393 resets) in 44 ms. (888 steps per ms) remains 1/1 properties
Interrupted probabilistic random walk after 1463906 steps, run timeout after 3001 ms. (steps per millisecond=487 ) properties seen :0 out of 1
Probabilistic random walk after 1463906 steps, saw 188215 distinct states, run finished after 3001 ms. (steps per millisecond=487 ) properties seen :0
// Phase 1: matrix 103 rows 162 cols
[2026-05-23 11:05:19] [INFO ] Computed 62 invariants in 2 ms
[2026-05-23 11:05:19] [INFO ] State equation strengthened by 3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
All remaining problems are real, not stopping.
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 0/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (OVERLAPS) 4/265 variables, 4/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (OVERLAPS) 0/265 variables, 0/227 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Real declared 265/265 variables, and 227 constraints, problems are : Problem set: 0 solved, 1 unsolved in 150 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 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) 70/71 variables, 9/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/71 variables, 0/9 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 3 (OVERLAPS) 57/128 variables, 34/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/128 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 5 (OVERLAPS) 30/158 variables, 19/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/158 variables, 0/62 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 7 (OVERLAPS) 103/261 variables, 158/220 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/261 variables, 3/223 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/261 variables, 1/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/261 variables, 0/224 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 11 (OVERLAPS) 4/265 variables, 4/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 0/265 variables, 0/228 constraints. Problems are: Problem set: 0 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 265/265 variables, and 228 constraints, problems are : Problem set: 0 solved, 1 unsolved in 227 ms.
Refiners :[Positive P Invariants (semi-flows): 34/34 constraints, Generalized P Invariants (flows): 28/28 constraints, State Equation: 162/162 constraints, ReadFeed: 3/3 constraints, PredecessorRefiner: 1/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 384ms problems are : Problem set: 0 solved, 1 unsolved
Finished Parikh walk after 4905 steps, including 153 resets, run visited all 1 properties in 15 ms. (steps per millisecond=327 )
Parikh walk visited 1 properties in 22 ms.
Able to resolve query QuasiLiveness after proving 119 properties.
FORMULA QuasiLiveness TRUE TECHNIQUES RANDOM_WALK DECISION_DIAGRAMS COLLATERAL_PROCESSING BESTFIRST_WALK TOPOLOGICAL INITIAL_STATE USE_NUPN
Total runtime 1188797 ms.

BK_STOP 1779534319789

--------------------
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
+ [[ QuasiLiveness = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution QuasiLiveness -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202505121319.jar
+ VERSION=202505121319
+ echo 'Running Version 202505121319'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination QuasiLiveness -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800

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="DES-PT-10b"
export BK_EXAMINATION="QuasiLiveness"
export BK_TOOL="gold2025"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="1800"
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 DES-PT-10b, examination is QuasiLiveness"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r096-smll-177946996500232"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/DES-PT-10b.tgz
mv DES-PT-10b execution
cd execution
if [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "UpperBounds" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] || [ "QuasiLiveness" = "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 [ "QuasiLiveness" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "QuasiLiveness" != "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 "QuasiLiveness.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 '' QuasiLiveness.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] ; then
echo "FORMULA_NAME QuasiLiveness"
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 ;