Execution Chart

We display below the execution chart for this examination (boot time has been removed).

Trace from the execution

Formatting '/data/fkordon/mcc2026-input.r159-tall-177961079700005.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)
..............
=====================================================================
Generated by BenchKit 2-5973
Executing tool gold2025
Input is FunctionPointer-PT-a032, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r159-tall-177961079700005
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 508K
-rw-r--r-- 1 mcc users 6.8K Mar 7 07:28 CTLCardinality.txt
-rw-r--r-- 1 mcc users 72K Mar 7 07:28 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.5K Mar 7 07:28 CTLFireability.txt
-rw-r--r-- 1 mcc users 36K Mar 7 07:28 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.4K Mar 15 10:21 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Mar 15 10:21 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K Mar 15 10:22 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Mar 15 10:22 LTLFireability.xml
-rw-r--r-- 1 mcc users 11K Mar 7 07:28 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 118K Mar 7 07:28 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 13K Mar 7 07:28 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 124K Mar 7 07:28 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Mar 15 10:22 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Mar 15 10:22 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 equiv_col
-rw-r--r-- 1 mcc users 5 Mar 3 18:30 instance
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 iscolored
-rw-r--r-- 1 mcc users 34K Mar 3 18:30 model.pnml

--------------------
content from stdout:

=== Data for post analysis generated by BenchKit (invocation template)

The expected result is a vector of positive values
NUM_VECTOR

echo here is the order used to build the result vector(from xml file)
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-00
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-01
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-02
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-03
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-04
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-05
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-06
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-07
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-08
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-09
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-10
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-11
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-12
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-13
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-14
FORMULA_NAME FunctionPointer-PT-a032-UpperBounds-15

=== Now, execution of the tool begins

BK_START 1779699852912

Invoking MCC driver with
GOLD_TOOL=
BK_EXAMINATION=UpperBounds
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=FunctionPointer-PT-a032
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
UpperBounds PT
Running Version 202505121319
[2026-05-25 09:04:14] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, UpperBounds, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2026-05-25 09:04:14] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2026-05-25 09:04:14] [INFO ] Load time of PNML (sax parser for PT used): 56 ms
[2026-05-25 09:04:14] [INFO ] Transformed 40 places.
[2026-05-25 09:04:14] [INFO ] Transformed 70 transitions.
[2026-05-25 09:04:14] [INFO ] Parsed PT model containing 40 places and 70 transitions and 284 arcs in 145 ms.
Parsed 16 properties from file /home/mcc/execution/UpperBounds.xml in 8 ms.
Deduced a syphon composed of 6 places in 0 ms
Reduce places removed 6 places and 4 transitions.
FORMULA FunctionPointer-PT-a032-UpperBounds-00 0 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-a032-UpperBounds-08 0 TECHNIQUES TOPOLOGICAL INITIAL_STATE
Current structural bounds on expressions (Initially) : Max Seen:[0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 1] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (Before main loop) : Max Seen:[0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 1] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
[2026-05-25 09:04:14] [INFO ] Flow matrix only has 46 transitions (discarded 20 similar events)
// Phase 1: matrix 46 rows 34 cols
[2026-05-25 09:04:14] [INFO ] Computed 4 invariants in 5 ms
Current structural bounds on expressions (after invariants) : Max Seen:[0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 1] Max Struct:[+inf, +inf, +inf, 1, 32, 32, 1, 1, 1, 32, +inf, 1, +inf, 1]
FORMULA FunctionPointer-PT-a032-UpperBounds-15 1 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA FunctionPointer-PT-a032-UpperBounds-05 32 TECHNIQUES TOPOLOGICAL INITIAL_STATE
RANDOM walk for 10000 steps (29 resets) in 24 ms. (400 steps per ms)
FORMULA FunctionPointer-PT-a032-UpperBounds-13 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FunctionPointer-PT-a032-UpperBounds-10 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FunctionPointer-PT-a032-UpperBounds-09 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FunctionPointer-PT-a032-UpperBounds-07 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA FunctionPointer-PT-a032-UpperBounds-04 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 70007 steps (58 resets) in 83 ms. (833 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[51, 14, 34, 18, 31, 53, 4] Max Struct:[+inf, +inf, +inf, 32, 32, +inf, +inf]
[2026-05-25 09:04:14] [INFO ] Flow matrix only has 46 transitions (discarded 20 similar events)
[2026-05-25 09:04:14] [INFO ] Invariant cache hit.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:14] [INFO ] [Real]Absence check using 3 positive place invariants in 3 ms returned sat
[2026-05-25 09:04:14] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 2 ms returned sat
[2026-05-25 09:04:14] [INFO ] [Real]Absence check using state equation in 34 ms returned sat
[2026-05-25 09:04:14] [INFO ] State equation strengthened by 8 read => feed constraints.
[2026-05-25 09:04:14] [INFO ] [Real]Added 8 Read/Feed constraints in 4 ms returned sat
[2026-05-25 09:04:14] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:14] [INFO ] [Nat]Absence check using 3 positive place invariants in 2 ms returned sat
[2026-05-25 09:04:14] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:14] [INFO ] [Nat]Absence check using state equation in 19 ms returned sat
[2026-05-25 09:04:14] [INFO ] [Nat]Added 8 Read/Feed constraints in 3 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:14] [INFO ] Deduced a trap composed of 7 places in 48 ms of which 4 ms to minimize.
[2026-05-25 09:04:14] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 62 ms
[2026-05-25 09:04:14] [INFO ] Computed and/alt/rep : 25/101/23 causal constraints (skipped 21 transitions) in 15 ms.
[2026-05-25 09:04:15] [INFO ] Added : 19 causal constraints over 4 iterations in 60 ms. Result :sat
Minimization took 13 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using state equation in 16 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Added 8 Read/Feed constraints in 6 ms returned sat
[2026-05-25 09:04:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 2 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using state equation in 18 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Added 8 Read/Feed constraints in 3 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:15] [INFO ] Deduced a trap composed of 7 places in 47 ms of which 2 ms to minimize.
[2026-05-25 09:04:15] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 53 ms
[2026-05-25 09:04:15] [INFO ] Computed and/alt/rep : 25/101/23 causal constraints (skipped 21 transitions) in 5 ms.
[2026-05-25 09:04:15] [INFO ] Added : 13 causal constraints over 3 iterations in 23 ms. Result :sat
Minimization took 10 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using state equation in 14 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Added 8 Read/Feed constraints in 2 ms returned sat
[2026-05-25 09:04:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using state equation in 14 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Added 8 Read/Feed constraints in 2 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:15] [INFO ] Deduced a trap composed of 7 places in 41 ms of which 2 ms to minimize.
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:15] [INFO ] Deduced a trap composed of 7 places in 37 ms of which 2 ms to minimize.
[2026-05-25 09:04:15] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 90 ms
[2026-05-25 09:04:15] [INFO ] Computed and/alt/rep : 25/101/23 causal constraints (skipped 21 transitions) in 4 ms.
[2026-05-25 09:04:15] [INFO ] Added : 14 causal constraints over 3 iterations in 23 ms. Result :sat
Minimization took 10 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using state equation in 15 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Added 8 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using state equation in 14 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Added 8 Read/Feed constraints in 1 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:15] [INFO ] Deduced a trap composed of 7 places in 34 ms of which 2 ms to minimize.
[2026-05-25 09:04:15] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 39 ms
[2026-05-25 09:04:15] [INFO ] Computed and/alt/rep : 25/101/23 causal constraints (skipped 21 transitions) in 3 ms.
[2026-05-25 09:04:15] [INFO ] Added : 16 causal constraints over 4 iterations in 26 ms. Result :sat
Minimization took 11 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using state equation in 11 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Added 8 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using state equation in 14 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Added 8 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] Computed and/alt/rep : 25/101/23 causal constraints (skipped 21 transitions) in 4 ms.
[2026-05-25 09:04:15] [INFO ] Added : 9 causal constraints over 2 iterations in 20 ms. Result :sat
Minimization took 10 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive place invariants in 2 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using state equation in 11 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Added 8 Read/Feed constraints in 3 ms returned sat
[2026-05-25 09:04:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using state equation in 14 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Added 8 Read/Feed constraints in 1 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:15] [INFO ] Deduced a trap composed of 7 places in 51 ms of which 3 ms to minimize.
[2026-05-25 09:04:15] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 56 ms
[2026-05-25 09:04:15] [INFO ] Computed and/alt/rep : 25/101/23 causal constraints (skipped 21 transitions) in 5 ms.
[2026-05-25 09:04:15] [INFO ] Added : 13 causal constraints over 3 iterations in 29 ms. Result :sat
Minimization took 12 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Absence check using state equation in 10 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Real]Added 8 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Absence check using state equation in 9 ms returned sat
[2026-05-25 09:04:15] [INFO ] [Nat]Added 8 Read/Feed constraints in 1 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:16] [INFO ] Deduced a trap composed of 7 places in 46 ms of which 2 ms to minimize.
[2026-05-25 09:04:16] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 53 ms
[2026-05-25 09:04:16] [INFO ] Computed and/alt/rep : 25/101/23 causal constraints (skipped 21 transitions) in 4 ms.
[2026-05-25 09:04:16] [INFO ] Added : 18 causal constraints over 6 iterations in 42 ms. Result :sat
Minimization took 19 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[51, 14, 34, 18, 31, 53, 4] Max Struct:[+inf, +inf, +inf, 32, 32, +inf, +inf]
FORMULA FunctionPointer-PT-a032-UpperBounds-11 32 TECHNIQUES TOPOLOGICAL PARIKH_WALK
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[51, 14, 34, 22, 53, 4] Max Struct:[+inf, +inf, +inf, 32, +inf, +inf]
Support contains 6 out of 34 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 34/34 places, 66/66 transitions.
Graph (complete) has 118 edges and 34 vertex of which 31 are kept as prefixes of interest. Removing 3 places using SCC suffix rule.0 ms
Discarding 3 places :
Also discarding 0 output transitions
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 2 place count 30 transition count 64
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 30 transition count 64
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 0 with 2 rules applied. Total rules applied 5 place count 30 transition count 62
Drop transitions (Redundant composition of simpler transitions.) removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 1 with 2 rules applied. Total rules applied 7 place count 30 transition count 60
Applied a total of 7 rules in 26 ms. Remains 30 /34 variables (removed 4) and now considering 60/66 (removed 6) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 33 ms. Remains : 30/34 places, 60/66 transitions.
[2026-05-25 09:04:16] [INFO ] Flow matrix only has 43 transitions (discarded 17 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {3=1, 6=1, 21=1, 24=1, 32=1, 41=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {6=1, 21=1, 32=1, 41=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 104 resets, run finished after 41 ms. (steps per millisecond=243 ) properties (out of 6) seen :[2147483647, 3, 2147483647, 11, 4, 4]
Current structural bounds on expressions (after cover walk) : Max Seen:[+inf, 14, +inf, 22, 53, 4] Max Struct:[+inf, +inf, +inf, 32, +inf, +inf]
[2026-05-25 09:04:16] [INFO ] Flow matrix only has 43 transitions (discarded 17 similar events)
// Phase 1: matrix 43 rows 30 cols
[2026-05-25 09:04:16] [INFO ] Computed 2 invariants in 2 ms
Current structural bounds on expressions (after invariants) : Max Seen:[+inf, 14, +inf, 22, 53, 4] Max Struct:[+inf, +inf, +inf, 32, +inf, +inf]
RANDOM walk for 1000000 steps (2396 resets) in 644 ms. (1550 steps per ms)
FORMULA FunctionPointer-PT-a032-UpperBounds-03 +inf TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FunctionPointer-PT-a032-UpperBounds-01 +inf TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FunctionPointer-PT-a032-UpperBounds-06 32 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 3000003 steps (3652 resets) in 991 ms. (3024 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[18, 8354, 11] Max Struct:[+inf, +inf, +inf]
[2026-05-25 09:04:18] [INFO ] Flow matrix only has 43 transitions (discarded 17 similar events)
[2026-05-25 09:04:18] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:18] [INFO ] [Real]Absence check using 1 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Real]Absence check using 1 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Real]Absence check using state equation in 17 ms returned sat
[2026-05-25 09:04:18] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:18] [INFO ] [Nat]Absence check using 1 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Nat]Absence check using 1 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Nat]Absence check using state equation in 10 ms returned sat
[2026-05-25 09:04:18] [INFO ] State equation strengthened by 8 read => feed constraints.
[2026-05-25 09:04:18] [INFO ] [Nat]Added 8 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] Computed and/alt/rep : 26/109/24 causal constraints (skipped 17 transitions) in 3 ms.
[2026-05-25 09:04:18] [INFO ] Added : 14 causal constraints over 4 iterations in 19 ms. Result :sat
Minimization took 10 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:18] [INFO ] [Real]Absence check using 1 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Real]Absence check using 1 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Real]Absence check using state equation in 11 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Real]Added 8 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:18] [INFO ] [Nat]Absence check using 1 positive place invariants in 0 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Nat]Absence check using 1 positive and 1 generalized place invariants in 0 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Nat]Absence check using state equation in 9 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Nat]Added 8 Read/Feed constraints in 2 ms returned sat
[2026-05-25 09:04:18] [INFO ] Computed and/alt/rep : 26/109/24 causal constraints (skipped 17 transitions) in 3 ms.
[2026-05-25 09:04:18] [INFO ] Added : 14 causal constraints over 4 iterations in 32 ms. Result :sat
Minimization took 11 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:18] [INFO ] [Real]Absence check using 1 positive place invariants in 0 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Real]Absence check using 1 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Real]Absence check using state equation in 11 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Real]Added 8 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:18] [INFO ] [Nat]Absence check using 1 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Nat]Absence check using 1 positive and 1 generalized place invariants in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Nat]Absence check using state equation in 10 ms returned sat
[2026-05-25 09:04:18] [INFO ] [Nat]Added 8 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:18] [INFO ] Computed and/alt/rep : 26/109/24 causal constraints (skipped 17 transitions) in 4 ms.
[2026-05-25 09:04:18] [INFO ] Added : 8 causal constraints over 2 iterations in 20 ms. Result :sat
Minimization took 10 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[18, 8354, 11] Max Struct:[+inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[18, 8354, 11] Max Struct:[+inf, +inf, +inf]
Support contains 3 out of 30 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 30/30 places, 60/60 transitions.
Graph (complete) has 106 edges and 30 vertex of which 27 are kept as prefixes of interest. Removing 3 places using SCC suffix rule.0 ms
Discarding 3 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
Iterating post reduction 0 with 6 rules applied. Total rules applied 7 place count 27 transition count 54
Applied a total of 7 rules in 3 ms. Remains 27 /30 variables (removed 3) and now considering 54/60 (removed 6) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 3 ms. Remains : 27/30 places, 54/60 transitions.
[2026-05-25 09:04:22] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {3=1, 4=1, 5=1, 18=1, 28=1, 38=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 1 ms.
This minimized invariant on transitions {3=1, 18=1, 28=1, 38=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 46 ms. (steps per millisecond=217 ) properties (out of 3) seen :[7, 8, 6]
Current structural bounds on expressions (after cover walk) : Max Seen:[18, 8354, 11] Max Struct:[+inf, +inf, +inf]
[2026-05-25 09:04:22] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
// Phase 1: matrix 39 rows 27 cols
[2026-05-25 09:04:22] [INFO ] Computed 3 invariants in 1 ms
Current structural bounds on expressions (after invariants) : Max Seen:[18, 8354, 11] Max Struct:[+inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 735 ms. (1358 steps per ms)
BEST_FIRST walk for 3000003 steps (6 resets) in 906 ms. (3307 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[1339, 8354, 4476] Max Struct:[+inf, +inf, +inf]
[2026-05-25 09:04:24] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:24] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:24] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Real]Absence check using state equation in 15 ms returned sat
[2026-05-25 09:04:24] [INFO ] State equation strengthened by 7 read => feed constraints.
[2026-05-25 09:04:24] [INFO ] [Real]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:24] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:24] [INFO ] [Nat]Absence check using 3 positive place invariants in 2 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Nat]Absence check using state equation in 11 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Nat]Added 7 Read/Feed constraints in 2 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:24] [INFO ] Deduced a trap composed of 6 places in 35 ms of which 2 ms to minimize.
[2026-05-25 09:04:24] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 41 ms
[2026-05-25 09:04:24] [INFO ] Computed and/alt/rep : 24/99/22 causal constraints (skipped 15 transitions) in 3 ms.
[2026-05-25 09:04:24] [INFO ] Added : 6 causal constraints over 2 iterations in 17 ms. Result :sat
Minimization took 8 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:24] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Real]Absence check using state equation in 10 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Real]Added 7 Read/Feed constraints in 3 ms returned sat
[2026-05-25 09:04:24] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:24] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Nat]Absence check using state equation in 8 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Nat]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:24] [INFO ] Computed and/alt/rep : 24/99/22 causal constraints (skipped 15 transitions) in 3 ms.
[2026-05-25 09:04:24] [INFO ] Added : 18 causal constraints over 4 iterations in 19 ms. Result :sat
Minimization took 9 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:24] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Real]Absence check using state equation in 9 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Real]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:24] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:24] [INFO ] [Nat]Absence check using 3 positive place invariants in 0 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Nat]Absence check using state equation in 8 ms returned sat
[2026-05-25 09:04:24] [INFO ] [Nat]Added 7 Read/Feed constraints in 1 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:24] [INFO ] Deduced a trap composed of 6 places in 38 ms of which 2 ms to minimize.
[2026-05-25 09:04:24] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 45 ms
[2026-05-25 09:04:24] [INFO ] Computed and/alt/rep : 24/99/22 causal constraints (skipped 15 transitions) in 4 ms.
[2026-05-25 09:04:24] [INFO ] Added : 6 causal constraints over 2 iterations in 15 ms. Result :sat
Minimization took 9 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[1339, 8354, 4476] Max Struct:[+inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[1339, 8354, 4476] Max Struct:[+inf, +inf, +inf]
Support contains 3 out of 27 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 27/27 places, 54/54 transitions.
Applied a total of 0 rules in 2 ms. Remains 27 /27 variables (removed 0) and now considering 54/54 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 3 ms. Remains : 27/27 places, 54/54 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 27/27 places, 54/54 transitions.
Applied a total of 0 rules in 1 ms. Remains 27 /27 variables (removed 0) and now considering 54/54 (removed 0) transitions.
[2026-05-25 09:04:36] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:36] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 09:04:36] [INFO ] Implicit Places using invariants in 50 ms returned []
[2026-05-25 09:04:36] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:36] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 09:04:36] [INFO ] State equation strengthened by 7 read => feed constraints.
[2026-05-25 09:04:36] [INFO ] Implicit Places using invariants and state equation in 39 ms returned []
Implicit Place search using SMT with State Equation took 89 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 09:04:36] [INFO ] Redundant transitions in 0 ms returned []
Running 52 sub problems to find dead transitions.
[2026-05-25 09:04:36] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:36] [INFO ] Invariant cache hit.
[2026-05-25 09:04:36] [INFO ] State equation strengthened by 7 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/27 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/27 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 2 (OVERLAPS) 39/66 variables, 27/30 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/66 variables, 7/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/66 variables, 0/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 5 (OVERLAPS) 0/66 variables, 0/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
No progress, stopping.
After SMT solving in domain Real declared 66/66 variables, and 37 constraints, problems are : Problem set: 0 solved, 52 unsolved in 565 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 27/27 constraints, ReadFeed: 7/7 constraints, PredecessorRefiner: 52/52 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 52 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/27 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/27 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 2 (OVERLAPS) 39/66 variables, 27/30 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/66 variables, 7/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/66 variables, 52/89 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/66 variables, 0/89 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 6 (OVERLAPS) 0/66 variables, 0/89 constraints. Problems are: Problem set: 0 solved, 52 unsolved
No progress, stopping.
After SMT solving in domain Int declared 66/66 variables, and 89 constraints, problems are : Problem set: 0 solved, 52 unsolved in 782 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 27/27 constraints, ReadFeed: 7/7 constraints, PredecessorRefiner: 52/52 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 1388ms problems are : Problem set: 0 solved, 52 unsolved
Search for dead transitions found 0 dead transitions in 1392ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1497 ms. Remains : 27/27 places, 54/54 transitions.
[2026-05-25 09:04:37] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {3=1, 4=1, 5=1, 18=1, 28=1, 38=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {3=1, 18=1, 28=1, 38=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 19 ms. (steps per millisecond=526 ) properties (out of 3) seen :[3, 6, 6]
Current structural bounds on expressions (after cover walk) : Max Seen:[1339, 8354, 4476] Max Struct:[+inf, +inf, +inf]
[2026-05-25 09:04:38] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:38] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[1339, 8354, 4476] Max Struct:[+inf, +inf, +inf]
RANDOM walk for 1000004 steps (2 resets) in 729 ms. (1369 steps per ms)
BEST_FIRST walk for 3000002 steps (6 resets) in 865 ms. (3464 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[1339, 8354, 4519] Max Struct:[+inf, +inf, +inf]
[2026-05-25 09:04:39] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:39] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:39] [INFO ] [Real]Absence check using 3 positive place invariants in 2 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Real]Absence check using state equation in 10 ms returned sat
[2026-05-25 09:04:39] [INFO ] State equation strengthened by 7 read => feed constraints.
[2026-05-25 09:04:39] [INFO ] [Real]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:39] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:39] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Nat]Absence check using state equation in 9 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Nat]Added 7 Read/Feed constraints in 1 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:39] [INFO ] Deduced a trap composed of 6 places in 32 ms of which 2 ms to minimize.
[2026-05-25 09:04:39] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 40 ms
[2026-05-25 09:04:39] [INFO ] Computed and/alt/rep : 24/99/22 causal constraints (skipped 15 transitions) in 3 ms.
[2026-05-25 09:04:39] [INFO ] Added : 6 causal constraints over 2 iterations in 18 ms. Result :sat
Minimization took 11 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:39] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Real]Absence check using state equation in 9 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Real]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:39] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:39] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Nat]Absence check using state equation in 10 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Nat]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:39] [INFO ] Computed and/alt/rep : 24/99/22 causal constraints (skipped 15 transitions) in 2 ms.
[2026-05-25 09:04:39] [INFO ] Added : 18 causal constraints over 4 iterations in 19 ms. Result :sat
Minimization took 10 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:39] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Real]Absence check using state equation in 7 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Real]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:39] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:39] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Nat]Absence check using state equation in 10 ms returned sat
[2026-05-25 09:04:39] [INFO ] [Nat]Added 7 Read/Feed constraints in 2 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:39] [INFO ] Deduced a trap composed of 6 places in 40 ms of which 2 ms to minimize.
[2026-05-25 09:04:39] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 45 ms
[2026-05-25 09:04:39] [INFO ] Computed and/alt/rep : 24/99/22 causal constraints (skipped 15 transitions) in 3 ms.
[2026-05-25 09:04:40] [INFO ] Added : 6 causal constraints over 2 iterations in 17 ms. Result :sat
Minimization took 8 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[1339, 8354, 4519] Max Struct:[+inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[1346, 8354, 4519] Max Struct:[+inf, +inf, +inf]
Support contains 3 out of 27 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 27/27 places, 54/54 transitions.
Applied a total of 0 rules in 2 ms. Remains 27 /27 variables (removed 0) and now considering 54/54 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 4 ms. Remains : 27/27 places, 54/54 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 27/27 places, 54/54 transitions.
Applied a total of 0 rules in 2 ms. Remains 27 /27 variables (removed 0) and now considering 54/54 (removed 0) transitions.
[2026-05-25 09:04:52] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:52] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 09:04:52] [INFO ] Implicit Places using invariants in 50 ms returned []
[2026-05-25 09:04:52] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:52] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 09:04:52] [INFO ] State equation strengthened by 7 read => feed constraints.
[2026-05-25 09:04:52] [INFO ] Implicit Places using invariants and state equation in 39 ms returned []
Implicit Place search using SMT with State Equation took 90 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 09:04:52] [INFO ] Redundant transitions in 1 ms returned []
Running 52 sub problems to find dead transitions.
[2026-05-25 09:04:52] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:52] [INFO ] Invariant cache hit.
[2026-05-25 09:04:52] [INFO ] State equation strengthened by 7 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/27 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/27 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 2 (OVERLAPS) 39/66 variables, 27/30 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/66 variables, 7/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/66 variables, 0/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 5 (OVERLAPS) 0/66 variables, 0/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
No progress, stopping.
After SMT solving in domain Real declared 66/66 variables, and 37 constraints, problems are : Problem set: 0 solved, 52 unsolved in 524 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 27/27 constraints, ReadFeed: 7/7 constraints, PredecessorRefiner: 52/52 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 52 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/27 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/27 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 2 (OVERLAPS) 39/66 variables, 27/30 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/66 variables, 7/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/66 variables, 52/89 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/66 variables, 0/89 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 6 (OVERLAPS) 0/66 variables, 0/89 constraints. Problems are: Problem set: 0 solved, 52 unsolved
No progress, stopping.
After SMT solving in domain Int declared 66/66 variables, and 89 constraints, problems are : Problem set: 0 solved, 52 unsolved in 738 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 27/27 constraints, ReadFeed: 7/7 constraints, PredecessorRefiner: 52/52 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 1274ms problems are : Problem set: 0 solved, 52 unsolved
Search for dead transitions found 0 dead transitions in 1276ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1373 ms. Remains : 27/27 places, 54/54 transitions.
[2026-05-25 09:04:53] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {3=1, 4=1, 5=1, 18=1, 28=1, 38=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {3=1, 18=1, 28=1, 38=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 19 ms. (steps per millisecond=526 ) properties (out of 3) seen :[3, 6, 6]
Current structural bounds on expressions (after cover walk) : Max Seen:[1346, 8354, 4519] Max Struct:[+inf, +inf, +inf]
[2026-05-25 09:04:53] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:53] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[1346, 8354, 4519] Max Struct:[+inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 724 ms. (1379 steps per ms)
BEST_FIRST walk for 3000003 steps (6 resets) in 859 ms. (3488 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[1346, 8354, 4519] Max Struct:[+inf, +inf, +inf]
[2026-05-25 09:04:55] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:04:55] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:55] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Real]Absence check using state equation in 9 ms returned sat
[2026-05-25 09:04:55] [INFO ] State equation strengthened by 7 read => feed constraints.
[2026-05-25 09:04:55] [INFO ] [Real]Added 7 Read/Feed constraints in 2 ms returned sat
[2026-05-25 09:04:55] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:55] [INFO ] [Nat]Absence check using 3 positive place invariants in 2 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Nat]Absence check using state equation in 14 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Nat]Added 7 Read/Feed constraints in 2 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:55] [INFO ] Deduced a trap composed of 6 places in 28 ms of which 2 ms to minimize.
[2026-05-25 09:04:55] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 32 ms
[2026-05-25 09:04:55] [INFO ] Computed and/alt/rep : 24/99/22 causal constraints (skipped 15 transitions) in 2 ms.
[2026-05-25 09:04:55] [INFO ] Added : 6 causal constraints over 2 iterations in 12 ms. Result :sat
Minimization took 17 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:55] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Real]Absence check using state equation in 9 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Real]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:55] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:55] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Nat]Absence check using state equation in 8 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Nat]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:55] [INFO ] Computed and/alt/rep : 24/99/22 causal constraints (skipped 15 transitions) in 4 ms.
[2026-05-25 09:04:55] [INFO ] Added : 18 causal constraints over 4 iterations in 22 ms. Result :sat
Minimization took 10 ms.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:55] [INFO ] [Real]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Real]Absence check using state equation in 14 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Real]Added 7 Read/Feed constraints in 1 ms returned sat
[2026-05-25 09:04:55] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2026-05-25 09:04:55] [INFO ] [Nat]Absence check using 3 positive place invariants in 1 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Nat]Absence check using state equation in 10 ms returned sat
[2026-05-25 09:04:55] [INFO ] [Nat]Added 7 Read/Feed constraints in 1 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2026-05-25 09:04:55] [INFO ] Deduced a trap composed of 6 places in 39 ms of which 2 ms to minimize.
[2026-05-25 09:04:55] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 46 ms
[2026-05-25 09:04:55] [INFO ] Computed and/alt/rep : 24/99/22 causal constraints (skipped 15 transitions) in 5 ms.
[2026-05-25 09:04:55] [INFO ] Added : 6 causal constraints over 2 iterations in 17 ms. Result :sat
Minimization took 7 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[1346, 8354, 4519] Max Struct:[+inf, +inf, +inf]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[1346, 8354, 4519] Max Struct:[+inf, +inf, +inf]
Support contains 3 out of 27 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 27/27 places, 54/54 transitions.
Applied a total of 0 rules in 2 ms. Remains 27 /27 variables (removed 0) and now considering 54/54 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 2 ms. Remains : 27/27 places, 54/54 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 27/27 places, 54/54 transitions.
Applied a total of 0 rules in 2 ms. Remains 27 /27 variables (removed 0) and now considering 54/54 (removed 0) transitions.
[2026-05-25 09:05:07] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:05:07] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 09:05:07] [INFO ] Implicit Places using invariants in 37 ms returned []
[2026-05-25 09:05:07] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:05:07] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2026-05-25 09:05:07] [INFO ] State equation strengthened by 7 read => feed constraints.
[2026-05-25 09:05:07] [INFO ] Implicit Places using invariants and state equation in 37 ms returned []
Implicit Place search using SMT with State Equation took 75 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2026-05-25 09:05:07] [INFO ] Redundant transitions in 0 ms returned []
Running 52 sub problems to find dead transitions.
[2026-05-25 09:05:07] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:05:07] [INFO ] Invariant cache hit.
[2026-05-25 09:05:07] [INFO ] State equation strengthened by 7 read => feed constraints.
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/27 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/27 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 2 (OVERLAPS) 39/66 variables, 27/30 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/66 variables, 7/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/66 variables, 0/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 5 (OVERLAPS) 0/66 variables, 0/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
No progress, stopping.
After SMT solving in domain Real declared 66/66 variables, and 37 constraints, problems are : Problem set: 0 solved, 52 unsolved in 489 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 27/27 constraints, ReadFeed: 7/7 constraints, PredecessorRefiner: 52/52 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 52 unsolved
Starting Z3 with timeout 30.0 s and query timeout 3000.0 ms
At refinement iteration 0 (INCLUDED_ONLY) 0/27 variables, 3/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/27 variables, 0/3 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 2 (OVERLAPS) 39/66 variables, 27/30 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/66 variables, 7/37 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/66 variables, 52/89 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/66 variables, 0/89 constraints. Problems are: Problem set: 0 solved, 52 unsolved
At refinement iteration 6 (OVERLAPS) 0/66 variables, 0/89 constraints. Problems are: Problem set: 0 solved, 52 unsolved
No progress, stopping.
After SMT solving in domain Int declared 66/66 variables, and 89 constraints, problems are : Problem set: 0 solved, 52 unsolved in 760 ms.
Refiners :[Positive P Invariants (semi-flows): 3/3 constraints, State Equation: 27/27 constraints, ReadFeed: 7/7 constraints, PredecessorRefiner: 52/52 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 1260ms problems are : Problem set: 0 solved, 52 unsolved
Search for dead transitions found 0 dead transitions in 1260ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 1348 ms. Remains : 27/27 places, 54/54 transitions.
[2026-05-25 09:05:08] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Found an invariant !
This invariant on transitions {3=1, 4=1, 5=1, 18=1, 28=1, 38=1}
Produces a positive solution :{}
Attempting to minimize the solution found.
Minimization OK=successtook 0 ms.
This minimized invariant on transitions {3=1, 18=1, 28=1, 38=1}
Produces a positive solution
Incomplete random walk after 10000 steps, including 2 resets, run finished after 30 ms. (steps per millisecond=333 ) properties (out of 3) seen :[2147483647, 2147483647, 2147483647]
Current structural bounds on expressions (after cover walk) : Max Seen:[+inf, +inf, +inf] Max Struct:[+inf, +inf, +inf]
[2026-05-25 09:05:09] [INFO ] Flow matrix only has 39 transitions (discarded 15 similar events)
[2026-05-25 09:05:09] [INFO ] Invariant cache hit.
Current structural bounds on expressions (after invariants) : Max Seen:[+inf, +inf, +inf] Max Struct:[+inf, +inf, +inf]
RANDOM walk for 1000000 steps (2 resets) in 730 ms. (1367 steps per ms)
FORMULA FunctionPointer-PT-a032-UpperBounds-14 +inf TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FunctionPointer-PT-a032-UpperBounds-12 +inf TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FunctionPointer-PT-a032-UpperBounds-02 +inf TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 0 steps (0 resets) in 0 ms. (0 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[] Max Struct:[]
RANDOM walk for 0 steps (0 resets) in 4 ms. (0 steps per ms) remains 0/0 properties
Finished probabilistic random walk after 0 steps, run visited all 0 properties in 0 ms. (steps per millisecond=0 )
[2026-05-25 09:05:09] [INFO ] Flatten gal took : 28 ms
[2026-05-25 09:05:09] [INFO ] Flatten gal took : 7 ms
[2026-05-25 09:05:09] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality2324826122042558586.gal : 5 ms
[2026-05-25 09:05:09] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality8890092073345594426.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/ReachabilityCardinality2324826122042558586.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality8890092073345594426.prop' '--nowitness' '--gen-order' 'FOLLOW'
ITS runner timed out or was interrupted.

ITS tools runner thread asked to quit. Dying gracefully.
Current structural bounds on expressions (After reachability solving 0 queries.) : Max Seen:[] Max Struct:[]
All properties solved without resorting to model-checking.
Total runtime 55696 ms.

BK_STOP 1779699909991

--------------------
content from stderr:

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ UpperBounds = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution UpperBounds -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ 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 UpperBounds -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600

Sequence of Actions to be Executed by the VM

This is useful if one wants to reexecute the tool in the VM from the submitted image disk.

set -x
# this is for BenchKit: configuration of major elements for the test
export BK_INPUT="FunctionPointer-PT-a032"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="gold2025"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"

# this is specific to your benchmark or test

export BIN_DIR="$HOME/BenchKit/bin"

# remove the execution directoty if it exists (to avoid increse of .vmdk images)
if [ -d execution ] ; then
rm -rf execution
fi

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-5973"
echo " Executing tool gold2025"
echo " Input is FunctionPointer-PT-a032, examination is UpperBounds"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r159-tall-177961079700005"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/FunctionPointer-PT-a032.tgz
mv FunctionPointer-PT-a032 execution
cd execution
if [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "UpperBounds" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] || [ "UpperBounds" = "StateSpace" ]; then
rm -f GenericPropertiesVerdict.xml
fi
pwd
ls -lh

echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "UpperBounds" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "UpperBounds" != "StateSpace" ] ; then
echo "The expected result is a vector of booleans"
echo BOOL_VECTOR
else
echo "no data necessary for post analysis"
fi
echo
if [ -f "UpperBounds.xml" ] ; then # for cunf (txt files deleted;-)
echo echo "here is the order used to build the result vector(from xml file)"
for x in $(grep '' UpperBounds.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] ; then
echo "FORMULA_NAME UpperBounds"
fi
echo
echo "=== Now, execution of the tool begins"
echo
echo -n "BK_START "
date -u +%s%3N
echo
timeout -s 9 $BK_TIME_CONFINEMENT bash -c "/home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n \"BK_STOP \" ; date -u +%s%3N"
if [ $? -eq 137 ] ; then
echo
echo "BK_TIME_CONFINEMENT_REACHED"
fi
echo
echo "--------------------"
echo "content from stderr:"
echo
cat STDERR ;