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Model Checking Contest 2026
16th edition, Hamburg, Germany, June 23, 2026
Execution of r168-smll-177961110100132
Last Updated
Jun 17, 2026

About the Execution of ITS-Tools for JoinFreeModules-PT-1000

Execution Summary
Max Memory
Used (MB)		 Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
5908.151 406682.00 1059406.00 728.00 T normal

Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2026-input.r168-smll-177961110100132.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 itstools
Input is JoinFreeModules-PT-1000, examination is QuasiLiveness
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r168-smll-177961110100132
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 3.5M
-rw-r--r-- 1 mcc users 5.3K Mar 7 15:48 CTLCardinality.txt
-rw-r--r-- 1 mcc users 48K Mar 7 15:48 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.4K Mar 7 15:46 CTLFireability.txt
-rw-r--r-- 1 mcc users 47K Mar 7 15:46 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Mar 3 18:30 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.9K Mar 15 11:05 LTLCardinality.txt
-rw-r--r-- 1 mcc users 28K Mar 15 11:05 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K Mar 15 11:05 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Mar 15 11:05 LTLFireability.xml
-rw-r--r-- 1 mcc users 11K Mar 7 15:53 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 105K Mar 7 15:53 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 9.9K Mar 7 15:51 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 85K Mar 7 15:51 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Mar 15 11:05 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Mar 15 11:05 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 3.1M 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 1779708523337

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=QuasiLiveness
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=JoinFreeModules-PT-1000
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
QuasiLiveness PT
Running Version 202604301425
[2026-05-25 11:28:45] [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]
[2026-05-25 11:28:45] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2026-05-25 11:28:46] [INFO ] Load time of PNML (sax parser for PT used): 891 ms
[2026-05-25 11:28:46] [INFO ] Transformed 5001 places.
[2026-05-25 11:28:46] [INFO ] Transformed 8001 transitions.
[2026-05-25 11:28:46] [INFO ] Parsed PT model containing 5001 places and 8001 transitions and 23002 arcs in 1167 ms.
Starting structural reductions in LIVENESS mode, iteration 0 : 5001/5001 places, 8001/8001 transitions.
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 5000 transition count 8001
Applied a total of 1 rules in 215 ms. Remains 5000 /5001 variables (removed 1) and now considering 8001/8001 (removed 0) transitions.
Running 6000 sub problems to find dead transitions.
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-6305313566238308667.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-12138968433043448407.kers'
[2026-05-25 11:28:47] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-6305313566238308667.kers, --Pflows, --basisKERS=/tmp/petrispot-output-12138968433043448407.kers]
Normalized transition count is 8000 out of 8001 initially.
Culled 0 columns in 10 ms.
// Phase 1: matrix 8000 rows 5000 cols 20000 entries
Finished phase 1 with 4000 SingleSign rule and 0 generalized
[2026-05-25 11:28:47] [INFO ] Computed 1000 invariants in 57 ms
Computed 1000 P flows in 59 ms.
Exported basis to /tmp/petrispot-output-12138968433043448407.kers
Total runtime 68 ms.
[2026-05-25 11:28:47] [INFO ] State equation strengthened by 1000 read => feed constraints.
Error getting values : (error "Timeout of Z3 solver reached")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 4000/13001 variables, and 0 constraints, problems are : Problem set: 0 solved, 6000 unsolved in 20443 ms.
Refiners :[Positive P Invariants (semi-flows): 0/1000 constraints, State Equation: 0/5000 constraints, ReadFeed: 0/1000 constraints, PredecessorRefiner: 6000/6000 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 6000 unsolved
Error getting values : (error "Timeout of Z3 solver reached")
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 4000/13001 variables, and 0 constraints, problems are : Problem set: 0 solved, 6000 unsolved in 20215 ms.
Refiners :[Positive P Invariants (semi-flows): 0/1000 constraints, State Equation: 0/5000 constraints, ReadFeed: 0/1000 constraints, PredecessorRefiner: 0/6000 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 46700ms problems are : Problem set: 0 solved, 6000 unsolved
Search for dead transitions found 0 dead transitions in 46823ms
[2026-05-25 11:29:33] [INFO ] Invariant cache hit.
[2026-05-25 11:29:36] [INFO ] Implicit Places using invariants in 2258 ms returned []
[2026-05-25 11:29:36] [INFO ] Invariant cache hit.
[2026-05-25 11:29:42] [INFO ] State equation strengthened by 1000 read => feed constraints.
[2026-05-25 11:29:42] [INFO ] Implicit Places using invariants and state equation in 6384 ms returned []
Implicit Place search using SMT with State Equation took 8651 ms to find 0 implicit places.
Skipped dead transition search.
Starting structural reductions in LIVENESS mode, iteration 1 : 5000/5001 places, 8001/8001 transitions.
Finished structural reductions in LIVENESS mode , in 1 iterations and 55844 ms. Remains : 5000/5001 places, 8001/8001 transitions.
Discarding 4000 transitions out of 8001. Remains 4001
Initial state reduction rules removed 1 formulas.
RANDOM walk for 40562 steps (8 resets) in 4328 ms. (9 steps per ms) remains 3925/4000 properties
BEST_FIRST walk for 124 steps (0 resets) in 27 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 38 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 27 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 31 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 36 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 37 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 22 ms. (5 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 33 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 31 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 31 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 33 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 32 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 39 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 39 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 31 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 28 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 23 ms. (5 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 27 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 23 ms. (5 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 24 ms. (4 steps per ms) remains 3925/3925 properties
[2026-05-25 11:29:44] [INFO ] Flatten gal took : 814 ms
BEST_FIRST walk for 124 steps (0 resets) in 19 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 25 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 27 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 25 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 26 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 29 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 25 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 27 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 22 ms. (5 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 22 ms. (5 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 31 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 27 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 32 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 19 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 17 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 17 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 22 ms. (5 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 24 ms. (4 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 17 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 18 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 19 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 17 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 17 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 33 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 18 ms. (6 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 23 ms. (5 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 22 ms. (5 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 15 ms. (7 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 33 ms. (3 steps per ms) remains 3925/3925 properties
BEST_FIRST walk for 124 steps (0 resets) in 16 ms. (7 steps per ms) remains 3925/3925 properties
[2026-05-25 11:29:44] [INFO ] Flatten gal took : 518 ms
[2026-05-25 11:29:45] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality11953266826339427438.gal : 227 ms
[2026-05-25 11:29:45] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality14505294824382062838.prop : 24 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality11953266826339427438.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality14505294824382062838.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...330
Loading property file /tmp/ReachabilityCardinality14505294824382062838.prop.
Probabilistic random walk after 9005 steps, saw 9002 distinct states, run finished after 3132 ms. (steps per millisecond=2 ) properties seen :973
[2026-05-25 11:29:47] [INFO ] Invariant cache hit.
[2026-05-25 11:29:47] [INFO ] State equation strengthened by 1000 read => feed constraints.
Error getting values : (error "Timeout of Z3 solver reached")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 2952/13001 variables, and 0 constraints, problems are : Problem set: 0 solved, 2952 unsolved in 5070 ms.
Refiners :[Positive P Invariants (semi-flows): 0/1000 constraints, State Equation: 0/5000 constraints, ReadFeed: 0/1000 constraints, PredecessorRefiner: 2952/2952 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 2952 unsolved
Error getting values : (error "Error writing to Z3 solver: java.io.IOException: Broken pipe")
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 2952/13001 variables, and 0 constraints, problems are : Problem set: 0 solved, 2952 unsolved in 5062 ms.
Refiners :[Positive P Invariants (semi-flows): 0/1000 constraints, State Equation: 0/5000 constraints, ReadFeed: 0/1000 constraints, PredecessorRefiner: 0/2952 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 12459ms problems are : Problem set: 0 solved, 2952 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 2952 out of 5000 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5000/5000 places, 8001/8001 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 5000 transition count 8000
Applied a total of 1 rules in 562 ms. Remains 5000 /5000 variables (removed 0) and now considering 8000/8001 (removed 1) transitions.
Running 6000 sub problems to find dead transitions.
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-10690358838727458222.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-727778229113962189.kers'
[2026-05-25 11:30:00] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-10690358838727458222.kers, --Pflows, --basisKERS=/tmp/petrispot-output-727778229113962189.kers]
Culled 0 columns in 6 ms.
// Phase 1: matrix 8000 rows 5000 cols 20000 entries
Finished phase 1 with 4000 SingleSign rule and 0 generalized
[2026-05-25 11:30:00] [INFO ] Computed 1000 invariants in 39 ms
Computed 1000 P flows in 39 ms.
Exported basis to /tmp/petrispot-output-727778229113962189.kers
Total runtime 46 ms.
[2026-05-25 11:30:01] [INFO ] State equation strengthened by 1000 read => feed constraints.
Error getting values : (error "Timeout of Z3 solver reached")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 4000/13000 variables, and 0 constraints, problems are : Problem set: 0 solved, 6000 unsolved in 20241 ms.
Refiners :[Positive P Invariants (semi-flows): 0/1000 constraints, State Equation: 0/5000 constraints, ReadFeed: 0/1000 constraints, PredecessorRefiner: 6000/6000 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 6000 unsolved
Reachability property qltransition_3 is true.
SDD proceeding with computation,3924 properties remain. new max is 2
SDD size :1 after 8
Error getting values : (error "Timeout of Z3 solver reached")
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 4000/13000 variables, and 0 constraints, problems are : Problem set: 0 solved, 6000 unsolved in 20213 ms.
Refiners :[Positive P Invariants (semi-flows): 0/1000 constraints, State Equation: 0/5000 constraints, ReadFeed: 0/1000 constraints, PredecessorRefiner: 0/6000 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 44771ms problems are : Problem set: 0 solved, 6000 unsolved
Search for dead transitions found 0 dead transitions in 44788ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 45368 ms. Remains : 5000/5000 places, 8000/8001 transitions.
SDD proceeding with computation,3924 properties remain. new max is 4
SDD size :8 after 17
Reachability property qltransition_1 is true.
SDD proceeding with computation,3923 properties remain. new max is 4
SDD size :17 after 39
RANDOM walk for 1738283 steps (4 resets) in 120105 ms. (14 steps per ms) remains 1310/2952 properties
BEST_FIRST walk for 4004 steps (0 resets) in 306 ms. (13 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 287 ms. (13 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 294 ms. (13 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 407 ms. (9 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 406 ms. (9 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 470 ms. (8 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 465 ms. (8 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 447 ms. (8 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 436 ms. (9 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 409 ms. (9 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 398 ms. (10 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 370 ms. (10 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 446 ms. (8 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 501 ms. (7 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 484 ms. (8 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 472 ms. (8 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 445 ms. (8 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 494 ms. (8 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 545 ms. (7 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 481 ms. (8 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 423 ms. (9 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 387 ms. (10 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 329 ms. (12 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 359 ms. (11 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 343 ms. (11 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 358 ms. (11 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 301 ms. (13 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 301 ms. (13 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 301 ms. (13 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 308 ms. (12 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 303 ms. (13 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 355 ms. (11 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 321 ms. (12 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 328 ms. (12 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 301 ms. (13 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 307 ms. (13 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 326 ms. (12 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 387 ms. (10 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 374 ms. (10 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 387 ms. (10 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 437 ms. (9 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 369 ms. (10 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 322 ms. (12 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 374 ms. (10 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 355 ms. (11 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 360 ms. (11 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 343 ms. (11 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 347 ms. (11 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 357 ms. (11 steps per ms) remains 1310/1310 properties
BEST_FIRST walk for 4004 steps (0 resets) in 344 ms. (11 steps per ms) remains 1310/1310 properties
[2026-05-25 11:31:21] [INFO ] Invariant cache hit.
[2026-05-25 11:31:21] [INFO ] State equation strengthened by 1000 read => feed constraints.
SDD proceeding with computation,3923 properties remain. new max is 8
SDD size :39 after 69
SDD proceeding with computation,3923 properties remain. new max is 16
SDD size :69 after 144
SDD proceeding with computation,3923 properties remain. new max is 32
SDD size :144 after 359
SDD proceeding with computation,3923 properties remain. new max is 64
SDD size :359 after 1052
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 1309/13000 variables, and 0 constraints, problems are : Problem set: 0 solved, 1309 unsolved in 45051 ms.
Refiners :[Positive P Invariants (semi-flows): 0/1000 constraints, State Equation: 0/5000 constraints, ReadFeed: 0/1000 constraints, PredecessorRefiner: 1309/1309 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 1309 unsolved
SDD proceeding with computation,3923 properties remain. new max is 128
SDD size :1052 after 3479
SDD proceeding with computation,3923 properties remain. new max is 256
SDD size :3479 after 12466
Error getting values : (error "Timeout of Z3 solver reached")
Solver is answering 'unknown', stopping.
After SMT solving in domain Int declared 1309/13000 variables, and 0 constraints, problems are : Problem set: 0 solved, 1309 unsolved in 45039 ms.
Refiners :[Positive P Invariants (semi-flows): 0/1000 constraints, State Equation: 0/5000 constraints, ReadFeed: 0/1000 constraints, PredecessorRefiner: 0/1309 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 91081ms problems are : Problem set: 0 solved, 1309 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 1309 out of 5000 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5000/5000 places, 8000/8000 transitions.
Graph (complete) has 12000 edges and 5000 vertex of which 3675 are kept as prefixes of interest. Removing 1325 places using SCC suffix rule.12 ms
Discarding 1325 places :
Also discarding 2120 output transitions
Drop transitions (Output transitions of discarded places.) removed 2120 transitions
Applied a total of 1 rules in 375 ms. Remains 3675 /5000 variables (removed 1325) and now considering 5880/8000 (removed 2120) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 375 ms. Remains : 3675/5000 places, 5880/8000 transitions.
RANDOM walk for 2401721 steps (4 resets) in 120073 ms. (20 steps per ms) remains 312/1309 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2379 ms. (16 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2554 ms. (15 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2300 ms. (17 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2164 ms. (18 steps per ms) remains 312/312 properties
SDD proceeding with computation,3923 properties remain. new max is 512
SDD size :12466 after 46904
BEST_FIRST walk for 40004 steps (8 resets) in 2302 ms. (17 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2463 ms. (16 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2230 ms. (17 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2073 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2258 ms. (17 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2062 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2079 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2720 ms. (14 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2178 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2090 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2118 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2165 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2240 ms. (17 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2433 ms. (16 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2771 ms. (14 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2233 ms. (17 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2432 ms. (16 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2542 ms. (15 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2139 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2135 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2059 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2243 ms. (17 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2216 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2256 ms. (17 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2095 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2122 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2313 ms. (17 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2196 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2082 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2146 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2055 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2062 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2544 ms. (15 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2113 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2185 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2051 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2086 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2572 ms. (15 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2090 ms. (19 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2140 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2112 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2215 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2159 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2215 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2181 ms. (18 steps per ms) remains 312/312 properties
BEST_FIRST walk for 40004 steps (8 resets) in 2155 ms. (18 steps per ms) remains 312/312 properties
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-1689570761179800680.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-7351934841438344745.kers'
[2026-05-25 11:33:54] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-1689570761179800680.kers, --Pflows, --basisKERS=/tmp/petrispot-output-7351934841438344745.kers]
Culled 0 columns in 4 ms.
// Phase 1: matrix 5880 rows 3675 cols 14700 entries
Finished phase 1 with 2940 SingleSign rule and 0 generalized
[2026-05-25 11:33:54] [INFO ] Computed 735 invariants in 25 ms
Computed 735 P flows in 26 ms.
Exported basis to /tmp/petrispot-output-7351934841438344745.kers
Total runtime 32 ms.
[2026-05-25 11:33:54] [INFO ] State equation strengthened by 735 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/312 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 312 unsolved
At refinement iteration 1 (OVERLAPS) 1103/1415 variables, 283/283 constraints. Problems are: Problem set: 0 solved, 312 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/1415 variables, 20/303 constraints. Problems are: Problem set: 0 solved, 312 unsolved
At refinement iteration 3 (INCLUDED_ONLY) 0/1415 variables, 20/323 constraints. Problems are: Problem set: 0 solved, 312 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1415 variables, 20/343 constraints. Problems are: Problem set: 0 solved, 312 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/1415 variables, 20/363 constraints. Problems are: Problem set: 0 solved, 312 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/1415 variables, 12/375 constraints. Problems are: Problem set: 0 solved, 312 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/1415 variables, 0/375 constraints. Problems are: Problem set: 0 solved, 312 unsolved
At refinement iteration 8 (OVERLAPS) 2264/3679 variables, 1415/1790 constraints. Problems are: Problem set: 0 solved, 312 unsolved
Error getting values : (error "Timeout of Z3 solver reached")
SMT process timed out in 75240ms, After SMT, problems are : Problem set: 0 solved, 312 unsolved
Fused 312 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 312 out of 3675 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 3675/3675 places, 5880/5880 transitions.
Graph (complete) has 8820 edges and 3675 vertex of which 1415 are kept as prefixes of interest. Removing 2260 places using SCC suffix rule.3 ms
Discarding 2260 places :
Also discarding 3616 output transitions
Drop transitions (Output transitions of discarded places.) removed 3616 transitions
Applied a total of 1 rules in 61 ms. Remains 1415 /3675 variables (removed 2260) and now considering 2264/5880 (removed 3616) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 61 ms. Remains : 1415/3675 places, 2264/5880 transitions.
RANDOM walk for 4000616 steps (8 resets) in 80661 ms. (49 steps per ms) remains 0/312 properties
ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
Able to resolve query QuasiLiveness after proving 4001 properties.
FORMULA QuasiLiveness TRUE TECHNIQUES RANDOM_WALK PROBABILISTIC_WALK DECISION_DIAGRAMS COLLATERAL_PROCESSING TOPOLOGICAL INITIAL_STATE
Total runtime 404474 ms.

BK_STOP 1779708930019

--------------------
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_1.0.0.202604301425.jar
+ VERSION=202604301425
+ echo 'Running Version 202604301425'
+ /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="JoinFreeModules-PT-1000"
export BK_EXAMINATION="QuasiLiveness"
export BK_TOOL="itstools"
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 itstools"
echo " Input is JoinFreeModules-PT-1000, 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 r168-smll-177961110100132"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/JoinFreeModules-PT-1000.tgz
mv JoinFreeModules-PT-1000 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 ;