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.r034-tall-177946842100678.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 CANConstruction-PT-080, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r034-tall-177946842100678
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 10M
-rw-r--r-- 1 mcc users 9.2K Mar 6 09:02 CTLCardinality.txt
-rw-r--r-- 1 mcc users 77K Mar 6 09:02 CTLCardinality.xml
-rw-r--r-- 1 mcc users 8.1K Mar 6 08:59 CTLFireability.txt
-rw-r--r-- 1 mcc users 59K Mar 6 08:59 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.7K Mar 15 07:52 LTLCardinality.txt
-rw-r--r-- 1 mcc users 27K Mar 15 07:52 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.2K Mar 15 07:52 LTLFireability.txt
-rw-r--r-- 1 mcc users 20K Mar 15 07:52 LTLFireability.xml
-rw-r--r-- 1 mcc users 18K Mar 6 09:02 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 141K Mar 6 09:02 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 12K Mar 6 09:02 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 77K Mar 6 09:02 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K Mar 15 07:52 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.0K Mar 15 07:52 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 equiv_col
-rw-r--r-- 1 mcc users 4 Mar 3 18:30 instance
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 iscolored
-rw-r--r-- 1 mcc users 9.5M 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

echo here is the order used to build the result vector(from xml file)
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-00
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-01
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-02
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-03
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-04
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-05
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-06
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-07
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-08
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-09
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-10
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-11
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-12
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-13
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-14
FORMULA_NAME CANConstruction-PT-080-ReachabilityCardinality-2024-15

=== Now, execution of the tool begins

BK_START 1779653140045

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=CANConstruction-PT-080
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
ReachabilityCardinality PT
Running Version 202604301425
[2026-05-24 20:05:41] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2026-05-24 20:05:41] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2026-05-24 20:05:41] [INFO ] Load time of PNML (sax parser for PT used): 529 ms
[2026-05-24 20:05:41] [INFO ] Transformed 13762 places.
[2026-05-24 20:05:41] [INFO ] Transformed 26240 transitions.
[2026-05-24 20:05:41] [INFO ] Parsed PT model containing 13762 places and 26240 transitions and 78400 arcs in 735 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 35 ms.
Working with output stream class java.io.PrintStream
RANDOM walk for 40000 steps (25 resets) in 3409 ms. (11 steps per ms) remains 11/16 properties
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-11 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-10 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-05 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-01 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40004 steps (8 resets) in 911 ms. (43 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 350 ms. (113 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 624 ms. (64 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 188 ms. (211 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 189 ms. (210 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 141 ms. (281 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 152 ms. (261 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 139 ms. (285 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 148 ms. (268 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 155 ms. (256 steps per ms) remains 11/11 properties
BEST_FIRST walk for 40004 steps (8 resets) in 233 ms. (170 steps per ms) remains 11/11 properties
[2026-05-24 20:05:44] [INFO ] Flatten gal took : 1367 ms
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-3654819048604483673.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-9195343279145163542.kers'
[2026-05-24 20:05:44] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-3654819048604483673.kers, --Pflows, --basisKERS=/tmp/petrispot-output-9195343279145163542.kers]
Culled 0 columns in 11 ms.
// Phase 1: matrix 26240 rows 13762 cols 52960 entries
Finished phase 1 with 13521 SingleSign rule and 80 generalized
[2026-05-24 20:05:44] [INFO ] Computed 161 invariants in 113 ms
Computed 161 P flows in 116 ms.
Exported basis to /tmp/petrispot-output-9195343279145163542.kers
Total runtime 144 ms.
[2026-05-24 20:05:44] [INFO ] Flatten gal took : 454 ms
[2026-05-24 20:05:44] [INFO ] State equation strengthened by 12720 read => feed constraints.
Excessive predecessor constraint size, skipping predecessor.
[2026-05-24 20:05:44] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality2141255904203632727.gal : 167 ms
[2026-05-24 20:05:44] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality9691299268166175846.prop : 2 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/ReachabilityCardinality2141255904203632727.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality9691299268166175846.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 ...328
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/210 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 11 unsolved
Problem CANConstruction-PT-080-ReachabilityCardinality-2024-06 is UNSAT
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-06 TRUE TECHNIQUES SMT_REFINEMENT
At refinement iteration 1 (OVERLAPS) 11943/12153 variables, 82/82 constraints. Problems are: Problem set: 1 solved, 10 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/12153 variables, 0/82 constraints. Problems are: Problem set: 1 solved, 10 unsolved
Loading property file /tmp/ReachabilityCardinality9691299268166175846.prop.
At refinement iteration 3 (OVERLAPS) 60/12213 variables, 60/142 constraints. Problems are: Problem set: 1 solved, 10 unsolved
Error getting values : (error "Timeout of Z3 solver reached")
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 12213/40002 variables, and 142 constraints, problems are : Problem set: 1 solved, 10 unsolved in 5039 ms.
Refiners :[Positive P Invariants (semi-flows): 142/158 constraints, Generalized P Invariants (flows): 0/3 constraints, State Equation: 0/13762 constraints, ReadFeed: 0/12720 constraints, PredecessorRefiner: 11/7 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 1 solved, 10 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/209 variables, 0/0 constraints. Problems are: Problem set: 1 solved, 10 unsolved
At refinement iteration 1 (OVERLAPS) 11944/12153 variables, 82/82 constraints. Problems are: Problem set: 1 solved, 10 unsolved
SMT process timed out in 34823ms, After SMT, problems are : Problem set: 1 solved, 10 unsolved
Fused 10 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 209 out of 13762 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 13762/13762 places, 26240/26240 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 534 transitions
Trivial Post-agglo rules discarded 534 transitions
Performed 534 trivial Post agglomeration. Transition count delta: 534
Iterating post reduction 0 with 534 rules applied. Total rules applied 534 place count 13762 transition count 25706
Reduce places removed 534 places and 0 transitions.
Performed 9 Post agglomeration using F-continuation condition.Transition count delta: 9
Iterating post reduction 1 with 543 rules applied. Total rules applied 1077 place count 13228 transition count 25697
Reduce places removed 9 places and 0 transitions.
Iterating post reduction 2 with 9 rules applied. Total rules applied 1086 place count 13219 transition count 25697
Performed 4 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 4 Pre rules applied. Total rules applied 1086 place count 13219 transition count 25693
Deduced a syphon composed of 4 places in 7 ms
Reduce places removed 4 places and 0 transitions.
Iterating global reduction 3 with 8 rules applied. Total rules applied 1094 place count 13215 transition count 25693
Discarding 6138 places :
Symmetric choice reduction at 3 with 6138 rule applications. Total rules 7232 place count 7077 transition count 13417
Iterating global reduction 3 with 6138 rules applied. Total rules applied 13370 place count 7077 transition count 13417
Performed 70 Post agglomeration using F-continuation condition.Transition count delta: 70
Deduced a syphon composed of 70 places in 5 ms
Reduce places removed 70 places and 0 transitions.
Iterating global reduction 3 with 140 rules applied. Total rules applied 13510 place count 7007 transition count 13347
Free-agglomeration rule applied 47 times.
Iterating global reduction 3 with 47 rules applied. Total rules applied 13557 place count 7007 transition count 13300
Reduce places removed 47 places and 0 transitions.
Iterating post reduction 3 with 47 rules applied. Total rules applied 13604 place count 6960 transition count 13300
Free-agglomeration rule (complex) applied 3 times.
Iterating global reduction 4 with 3 rules applied. Total rules applied 13607 place count 6960 transition count 13297
Reduce places removed 3 places and 0 transitions.
Iterating post reduction 4 with 3 rules applied. Total rules applied 13610 place count 6957 transition count 13297
Partial Free-agglomeration rule applied 119 times.
Drop transitions (Partial Free agglomeration) removed 119 transitions
Iterating global reduction 5 with 119 rules applied. Total rules applied 13729 place count 6957 transition count 13297
Partial Free-agglomeration rule applied 5 times.
Drop transitions (Partial Free agglomeration) removed 5 transitions
Iterating global reduction 5 with 5 rules applied. Total rules applied 13734 place count 6957 transition count 13297
Applied a total of 13734 rules in 14390 ms. Remains 6957 /13762 variables (removed 6805) and now considering 13297/26240 (removed 12943) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 14403 ms. Remains : 6957/13762 places, 13297/26240 transitions.
RANDOM walk for 40000 steps (66 resets) in 1737 ms. (23 steps per ms) remains 5/10 properties
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-15 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-13 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-12 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-09 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-08 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40004 steps (8 resets) in 211 ms. (188 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 247 ms. (161 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 245 ms. (162 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 123 ms. (322 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 140 ms. (283 steps per ms) remains 5/5 properties
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-2734814132329441653.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-1200431823849473933.kers'
[2026-05-24 20:06:34] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-2734814132329441653.kers, --Pflows, --basisKERS=/tmp/petrispot-output-1200431823849473933.kers]
Culled 0 columns in 5 ms.
// Phase 1: matrix 13297 rows 6957 cols 27114 entries
Finished phase 1 with 6716 SingleSign rule and 80 generalized
[2026-05-24 20:06:34] [INFO ] Computed 161 invariants in 54 ms
Computed 161 P flows in 54 ms.
Exported basis to /tmp/petrispot-output-1200431823849473933.kers
Total runtime 63 ms.
[2026-05-24 20:06:34] [INFO ] State equation strengthened by 12843 read => feed constraints.
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/163 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 1 (OVERLAPS) 5634/5797 variables, 75/75 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/5797 variables, 0/75 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 3 (OVERLAPS) 59/5856 variables, 59/134 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/5856 variables, 0/134 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 5 (OVERLAPS) 98/5954 variables, 3/137 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/5954 variables, 0/137 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 7 (OVERLAPS) 1002/6956 variables, 24/161 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/6956 variables, 0/161 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 9 (OVERLAPS) 13297/20253 variables, 6956/7117 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/20253 variables, 12843/19960 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/20253 variables, 0/19960 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 12 (OVERLAPS) 1/20254 variables, 1/19961 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/20254 variables, 0/19961 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 14 (OVERLAPS) 0/20254 variables, 0/19961 constraints. Problems are: Problem set: 0 solved, 5 unsolved
No progress, stopping.
After SMT solving in domain Real declared 20254/20254 variables, and 19961 constraints, problems are : Problem set: 0 solved, 5 unsolved in 45012 ms.
Refiners :[Positive P Invariants (semi-flows): 158/158 constraints, Generalized P Invariants (flows): 3/3 constraints, State Equation: 6957/6957 constraints, ReadFeed: 12843/12843 constraints, PredecessorRefiner: 5/2 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 5 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/163 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 1 (OVERLAPS) 5634/5797 variables, 75/75 constraints. Problems are: Problem set: 0 solved, 5 unsolved
SMT process timed out in 109245ms, After SMT, problems are : Problem set: 0 solved, 5 unsolved
Fused 5 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 163 out of 6957 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 6957/6957 places, 13297/13297 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 6957 transition count 13296
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 1 with 1 rules applied. Total rules applied 2 place count 6956 transition count 13296
Discarding 2 places :
Symmetric choice reduction at 2 with 2 rule applications. Total rules 4 place count 6954 transition count 13292
Iterating global reduction 2 with 2 rules applied. Total rules applied 6 place count 6954 transition count 13292
Performed 18 Post agglomeration using F-continuation condition.Transition count delta: 18
Deduced a syphon composed of 18 places in 3 ms
Reduce places removed 18 places and 0 transitions.
Iterating global reduction 2 with 36 rules applied. Total rules applied 42 place count 6936 transition count 13274
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 2 places in 2 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 2 with 4 rules applied. Total rules applied 46 place count 6934 transition count 13274
Partial Free-agglomeration rule applied 2 times.
Drop transitions (Partial Free agglomeration) removed 2 transitions
Iterating global reduction 2 with 2 rules applied. Total rules applied 48 place count 6934 transition count 13274
Applied a total of 48 rules in 8403 ms. Remains 6934 /6957 variables (removed 23) and now considering 13274/13297 (removed 23) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 8403 ms. Remains : 6934/6957 places, 13274/13297 transitions.
RANDOM walk for 40000 steps (68 resets) in 1838 ms. (21 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 203 ms. (196 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 220 ms. (181 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 218 ms. (182 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 154 ms. (258 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 147 ms. (270 steps per ms) remains 5/5 properties
Interrupted probabilistic random walk after 90126 steps, run timeout after 3001 ms. (steps per millisecond=30 ) properties seen :0 out of 5
Probabilistic random walk after 90126 steps, saw 74274 distinct states, run finished after 3007 ms. (steps per millisecond=29 ) properties seen :0
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-8490145960053891474.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-13312572108203370899.kers'
[2026-05-24 20:08:35] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-8490145960053891474.kers, --Pflows, --basisKERS=/tmp/petrispot-output-13312572108203370899.kers]
Culled 0 columns in 5 ms.
// Phase 1: matrix 13274 rows 6934 cols 27070 entries
Finished phase 1 with 6693 SingleSign rule and 80 generalized
[2026-05-24 20:08:35] [INFO ] Computed 161 invariants in 53 ms
Computed 161 P flows in 54 ms.
Exported basis to /tmp/petrispot-output-13312572108203370899.kers
Total runtime 62 ms.
[2026-05-24 20:08:35] [INFO ] State equation strengthened by 12865 read => feed constraints.
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/163 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 1 (OVERLAPS) 5613/5776 variables, 75/75 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/5776 variables, 0/75 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 3 (OVERLAPS) 59/5835 variables, 59/134 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/5835 variables, 0/134 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 5 (OVERLAPS) 98/5933 variables, 3/137 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/5933 variables, 0/137 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 7 (OVERLAPS) 1000/6933 variables, 24/161 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/6933 variables, 0/161 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 9 (OVERLAPS) 13274/20207 variables, 6933/7094 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 10 (INCLUDED_ONLY) 0/20207 variables, 12865/19959 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/20207 variables, 0/19959 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 12 (OVERLAPS) 1/20208 variables, 1/19960 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 13 (INCLUDED_ONLY) 0/20208 variables, 0/19960 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 14 (OVERLAPS) 0/20208 variables, 0/19960 constraints. Problems are: Problem set: 0 solved, 5 unsolved
No progress, stopping.
After SMT solving in domain Real declared 20208/20208 variables, and 19960 constraints, problems are : Problem set: 0 solved, 5 unsolved in 51577 ms.
Refiners :[Positive P Invariants (semi-flows): 158/158 constraints, Generalized P Invariants (flows): 3/3 constraints, State Equation: 6934/6934 constraints, ReadFeed: 12865/12865 constraints, PredecessorRefiner: 5/2 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 5 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/163 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 1 (OVERLAPS) 5613/5776 variables, 75/75 constraints. Problems are: Problem set: 0 solved, 5 unsolved
SMT process timed out in 134777ms, After SMT, problems are : Problem set: 0 solved, 5 unsolved
Fused 5 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 163 out of 6934 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 6934/6934 places, 13274/13274 transitions.
Applied a total of 0 rules in 2070 ms. Remains 6934 /6934 variables (removed 0) and now considering 13274/13274 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 2070 ms. Remains : 6934/6934 places, 13274/13274 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 6934/6934 places, 13274/13274 transitions.
Applied a total of 0 rules in 2089 ms. Remains 6934 /6934 variables (removed 0) and now considering 13274/13274 (removed 0) transitions.
[2026-05-24 20:10:54] [INFO ] Invariant cache hit.
[2026-05-24 20:11:06] [INFO ] Implicit Places using invariants in 11623 ms returned [5, 11, 15, 21, 27, 33, 39, 45, 51, 55, 61, 68, 74, 80, 86, 92, 98, 104, 110, 114, 120, 126, 132, 141, 147, 153, 159, 163, 169, 175, 181, 186, 190, 196, 200, 206, 212, 216, 220, 224, 230, 236, 242, 246, 252, 258, 264, 268, 274, 281, 285, 291, 295, 301, 307, 313, 319, 325, 331, 339, 343, 347, 351, 357, 363, 369, 376, 380, 386, 390, 394, 400, 406, 412, 420, 426, 432, 438, 444, 451]
Discarding 80 places :
Implicit Place search using SMT only with invariants took 11659 ms to find 80 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 1 : 6854/6934 places, 13274/13274 transitions.
Performed 43 Post agglomeration using F-continuation condition.Transition count delta: 43
Iterating post reduction 0 with 43 rules applied. Total rules applied 43 place count 6854 transition count 13231
Reduce places removed 43 places and 0 transitions.
Iterating post reduction 1 with 43 rules applied. Total rules applied 86 place count 6811 transition count 13231
Discarding 4 places :
Symmetric choice reduction at 2 with 4 rule applications. Total rules 90 place count 6807 transition count 13227
Iterating global reduction 2 with 4 rules applied. Total rules applied 94 place count 6807 transition count 13227
Performed 62 Post agglomeration using F-continuation condition.Transition count delta: 62
Deduced a syphon composed of 62 places in 3 ms
Reduce places removed 62 places and 0 transitions.
Iterating global reduction 2 with 124 rules applied. Total rules applied 218 place count 6745 transition count 13165
Applied a total of 218 rules in 6135 ms. Remains 6745 /6854 variables (removed 109) and now considering 13165/13274 (removed 109) transitions.
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-14712971667525080677.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-200532233890854784.kers'
[2026-05-24 20:11:12] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-14712971667525080677.kers, --Pflows, --basisKERS=/tmp/petrispot-output-200532233890854784.kers]
Culled 0 columns in 5 ms.
// Phase 1: matrix 13165 rows 6745 cols 26671 entries
Finished phase 1 with 6664 SingleSign rule and 0 generalized
[2026-05-24 20:11:12] [INFO ] Computed 81 invariants in 241 ms
Computed 81 P flows in 243 ms.
Exported basis to /tmp/petrispot-output-200532233890854784.kers
Total runtime 251 ms.
[2026-05-24 20:11:23] [INFO ] Implicit Places using invariants in 10689 ms returned []
Implicit Place search using SMT only with invariants took 10704 ms to find 0 implicit places.
Starting structural reductions in REACHABILITY mode, iteration 2 : 6745/6934 places, 13165/13274 transitions.
Finished structural reductions in REACHABILITY mode , in 2 iterations and 30602 ms. Remains : 6745/6934 places, 13165/13274 transitions.
RANDOM walk for 40000 steps (67 resets) in 1506 ms. (26 steps per ms) remains 4/5 properties
FORMULA CANConstruction-PT-080-ReachabilityCardinality-2024-14 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40004 steps (8 resets) in 192 ms. (207 steps per ms) remains 4/4 properties
BEST_FIRST walk for 40004 steps (8 resets) in 201 ms. (198 steps per ms) remains 4/4 properties
BEST_FIRST walk for 40004 steps (8 resets) in 216 ms. (184 steps per ms) remains 4/4 properties
BEST_FIRST walk for 40004 steps (8 resets) in 144 ms. (275 steps per ms) remains 4/4 properties
[2026-05-24 20:11:23] [INFO ] Invariant cache hit.
[2026-05-24 20:11:23] [INFO ] State equation strengthened by 12740 read => feed constraints.
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/161 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 1 (OVERLAPS) 6570/6731 variables, 68/68 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/6731 variables, 0/68 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 3 (OVERLAPS) 13/6744 variables, 13/81 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/6744 variables, 0/81 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 5 (OVERLAPS) 13165/19909 variables, 6744/6825 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/19909 variables, 12740/19565 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/19909 variables, 0/19565 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 8 (OVERLAPS) 1/19910 variables, 1/19566 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/19910 variables, 0/19566 constraints. Problems are: Problem set: 0 solved, 4 unsolved
SDD proceeding with computation,11 properties remain. new max is 4
SDD size :1 after 82
SDD proceeding with computation,11 properties remain. new max is 8
SDD size :82 after 83
SDD proceeding with computation,11 properties remain. new max is 16
SDD size :83 after 85
SDD proceeding with computation,11 properties remain. new max is 32
SDD size :85 after 88
SDD proceeding with computation,11 properties remain. new max is 64
SDD size :88 after 94
SDD proceeding with computation,11 properties remain. new max is 128
SDD size :94 after 105
At refinement iteration 10 (OVERLAPS) 0/19910 variables, 0/19566 constraints. Problems are: Problem set: 0 solved, 4 unsolved
SDD proceeding with computation,11 properties remain. new max is 256
SDD size :105 after 127
SDD proceeding with computation,11 properties remain. new max is 512
SDD size :127 after 162
SDD proceeding with computation,11 properties remain. new max is 1024
SDD size :162 after 172
No progress, stopping.
SDD proceeding with computation,11 properties remain. new max is 2048
SDD size :172 after 183
After SMT solving in domain Real declared 19910/19910 variables, and 19566 constraints, problems are : Problem set: 0 solved, 4 unsolved in 17934 ms.
Refiners :[Positive P Invariants (semi-flows): 81/81 constraints, State Equation: 6745/6745 constraints, ReadFeed: 12740/12740 constraints, PredecessorRefiner: 4/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 4 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/161 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 1 (OVERLAPS) 6570/6731 variables, 68/68 constraints. Problems are: Problem set: 0 solved, 4 unsolved
SDD proceeding with computation,11 properties remain. new max is 4096
SDD size :183 after 205
SMT process timed out in 113941ms, After SMT, problems are : Problem set: 0 solved, 4 unsolved
Fused 4 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 161 out of 6745 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 6745/6745 places, 13165/13165 transitions.
Discarding 2 places :
Symmetric choice reduction at 0 with 2 rule applications. Total rules 2 place count 6743 transition count 13161
Iterating global reduction 0 with 2 rules applied. Total rules applied 4 place count 6743 transition count 13161
Applied a total of 4 rules in 4386 ms. Remains 6743 /6745 variables (removed 2) and now considering 13161/13165 (removed 4) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 4386 ms. Remains : 6743/6745 places, 13161/13165 transitions.
RANDOM walk for 40000 steps (68 resets) in 1242 ms. (32 steps per ms) remains 4/4 properties
BEST_FIRST walk for 40004 steps (8 resets) in 147 ms. (270 steps per ms) remains 4/4 properties
BEST_FIRST walk for 40004 steps (8 resets) in 147 ms. (270 steps per ms) remains 4/4 properties
BEST_FIRST walk for 40004 steps (8 resets) in 156 ms. (254 steps per ms) remains 4/4 properties
BEST_FIRST walk for 40004 steps (8 resets) in 120 ms. (330 steps per ms) remains 4/4 properties
Interrupted probabilistic random walk after 90189 steps, run timeout after 3001 ms. (steps per millisecond=30 ) properties seen :0 out of 4
Probabilistic random walk after 90189 steps, saw 74975 distinct states, run finished after 3001 ms. (steps per millisecond=30 ) properties seen :0
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-8616272103873167676.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-2717035788225311624.kers'
[2026-05-24 20:13:25] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-8616272103873167676.kers, --Pflows, --basisKERS=/tmp/petrispot-output-2717035788225311624.kers]
Culled 0 columns in 5 ms.
// Phase 1: matrix 13161 rows 6743 cols 26661 entries
Finished phase 1 with 6662 SingleSign rule and 0 generalized
[2026-05-24 20:13:26] [INFO ] Computed 81 invariants in 241 ms
Computed 81 P flows in 242 ms.
Exported basis to /tmp/petrispot-output-2717035788225311624.kers
Total runtime 250 ms.
[2026-05-24 20:13:26] [INFO ] State equation strengthened by 12740 read => feed constraints.
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/161 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 1 (OVERLAPS) 6568/6729 variables, 68/68 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/6729 variables, 0/68 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 3 (OVERLAPS) 13/6742 variables, 13/81 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/6742 variables, 0/81 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 5 (OVERLAPS) 13161/19903 variables, 6742/6823 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/19903 variables, 12740/19563 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/19903 variables, 0/19563 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 8 (OVERLAPS) 1/19904 variables, 1/19564 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/19904 variables, 0/19564 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 10 (OVERLAPS) 0/19904 variables, 0/19564 constraints. Problems are: Problem set: 0 solved, 4 unsolved
No progress, stopping.
After SMT solving in domain Real declared 19904/19904 variables, and 19564 constraints, problems are : Problem set: 0 solved, 4 unsolved in 20826 ms.
Refiners :[Positive P Invariants (semi-flows): 81/81 constraints, State Equation: 6743/6743 constraints, ReadFeed: 12740/12740 constraints, PredecessorRefiner: 4/1 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 4 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/161 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 4 unsolved
At refinement iteration 1 (OVERLAPS) 6568/6729 variables, 68/68 constraints. Problems are: Problem set: 0 solved, 4 unsolved
SMT process timed out in 133975ms, After SMT, problems are : Problem set: 0 solved, 4 unsolved
Fused 4 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 161 out of 6743 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 6743/6743 places, 13161/13161 transitions.
Applied a total of 0 rules in 2262 ms. Remains 6743 /6743 variables (removed 0) and now considering 13161/13161 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 2263 ms. Remains : 6743/6743 places, 13161/13161 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 6743/6743 places, 13161/13161 transitions.
Applied a total of 0 rules in 2267 ms. Remains 6743 /6743 variables (removed 0) and now considering 13161/13161 (removed 0) transitions.
[2026-05-24 20:15:44] [INFO ] Invariant cache hit.
[2026-05-24 20:15:54] [INFO ] Implicit Places using invariants in 10609 ms returned []
Implicit Place search using SMT only with invariants took 10625 ms to find 0 implicit places.
Running 13081 sub problems to find dead transitions.
[2026-05-24 20:15:55] [INFO ] Invariant cache hit.
[2026-05-24 20:15:55] [INFO ] State equation strengthened by 12740 read => feed constraints.
At refinement iteration 0 (INCLUDED_ONLY) 0/6742 variables, 81/81 constraints. Problems are: Problem set: 0 solved, 13081 unsolved
Solver is answering 'unknown', stopping.
After SMT solving in domain Real declared 6742/19904 variables, and 81 constraints, problems are : Problem set: 0 solved, 13081 unsolved in 30265 ms.
Refiners :[Positive P Invariants (semi-flows): 81/81 constraints, State Equation: 0/6743 constraints, ReadFeed: 0/12740 constraints, PredecessorRefiner: 13081/13081 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
Escalating to Integer solving :Problem set: 0 solved, 13081 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/6742 variables, 81/81 constraints. Problems are: Problem set: 0 solved, 13081 unsolved
SMT process timed out in 88377ms, After SMT, problems are : Problem set: 0 solved, 13081 unsolved
Search for dead transitions found 0 dead transitions in 88480ms
Finished structural reductions in REACHABILITY mode , in 1 iterations and 101469 ms. Remains : 6743/6743 places, 13161/13161 transitions.
Attempting over-approximation, by ignoring read arcs.
Graph (trivial) has 12344 edges and 6743 vertex of which 5462 / 6743 are part of one of the 69 SCC in 19 ms
Free SCC test removed 5393 places
Drop transitions (Empty/Sink Transition effects.) removed 10717 transitions
Ensure Unique test removed 18 transitions
Reduce isomorphic transitions removed 10735 transitions.
Graph (complete) has 2748 edges and 1350 vertex of which 1244 are kept as prefixes of interest. Removing 106 places using SCC suffix rule.1 ms
Discarding 106 places :
Also discarding 26 output transitions
Drop transitions (Output transitions of discarded places.) removed 26 transitions
Drop transitions (Empty/Sink Transition effects.) removed 144 transitions
Reduce isomorphic transitions removed 144 transitions.
Drop transitions (Trivial Post-Agglo cleanup.) removed 619 transitions
Trivial Post-agglo rules discarded 619 transitions
Performed 619 trivial Post agglomeration. Transition count delta: 619
Iterating post reduction 0 with 763 rules applied. Total rules applied 765 place count 1244 transition count 1637
Reduce places removed 619 places and 0 transitions.
Ensure Unique test removed 610 transitions
Reduce isomorphic transitions removed 610 transitions.
Performed 232 Post agglomeration using F-continuation condition.Transition count delta: 232
Iterating post reduction 1 with 1461 rules applied. Total rules applied 2226 place count 625 transition count 795
Reduce places removed 232 places and 0 transitions.
Ensure Unique test removed 227 transitions
Reduce isomorphic transitions removed 227 transitions.
Iterating post reduction 2 with 459 rules applied. Total rules applied 2685 place count 393 transition count 568
Performed 15 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 15 Pre rules applied. Total rules applied 2685 place count 393 transition count 553
Deduced a syphon composed of 15 places in 0 ms
Reduce places removed 15 places and 0 transitions.
Iterating global reduction 3 with 30 rules applied. Total rules applied 2715 place count 378 transition count 553
Discarding 10 places :
Symmetric choice reduction at 3 with 10 rule applications. Total rules 2725 place count 368 transition count 543
Iterating global reduction 3 with 10 rules applied. Total rules applied 2735 place count 368 transition count 543
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 3 with 2 rules applied. Total rules applied 2737 place count 368 transition count 541
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 4 with 2 rules applied. Total rules applied 2739 place count 367 transition count 540
Performed 8 Post agglomeration using F-continuation condition.Transition count delta: -20
Deduced a syphon composed of 8 places in 0 ms
Reduce places removed 8 places and 0 transitions.
Iterating global reduction 4 with 16 rules applied. Total rules applied 2755 place count 359 transition count 560
Drop transitions (Redundant composition of simpler transitions.) removed 10 transitions
Redundant transition composition rules discarded 10 transitions
Iterating global reduction 4 with 10 rules applied. Total rules applied 2765 place count 359 transition count 550
Free-agglomeration rule applied 49 times.
Iterating global reduction 4 with 49 rules applied. Total rules applied 2814 place count 359 transition count 501
Reduce places removed 49 places and 0 transitions.
Iterating post reduction 4 with 49 rules applied. Total rules applied 2863 place count 310 transition count 501
Partial Free-agglomeration rule applied 45 times.
Drop transitions (Partial Free agglomeration) removed 45 transitions
Iterating global reduction 5 with 45 rules applied. Total rules applied 2908 place count 310 transition count 501
Discarding 25 places :
Symmetric choice reduction at 5 with 25 rule applications. Total rules 2933 place count 285 transition count 476
Iterating global reduction 5 with 25 rules applied. Total rules applied 2958 place count 285 transition count 476
Reduce places removed 26 places and 26 transitions.
Iterating global reduction 5 with 26 rules applied. Total rules applied 2984 place count 259 transition count 450
Applied a total of 2984 rules in 172 ms. Remains 259 /6743 variables (removed 6484) and now considering 450/13161 (removed 12711) transitions.
Running SMT prover for 4 properties.
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-9195481606394761723.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-8143362006049179270.kers'
[2026-05-24 20:17:23] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-9195481606394761723.kers, --Pflows, --basisKERS=/tmp/petrispot-output-8143362006049179270.kers]
Culling duplicate invariants (modulo rational): removing 12 columns.
Culled 12 columns in 0 ms.
// Phase 1: matrix 450 rows 247 cols 798 entries
Finished phase 1 with 241 SingleSign rule and 0 generalized
[2026-05-24 20:17:23] [INFO ] Computed 18 invariants in 1 ms
Computed 18 P flows in 5 ms.
Exported basis to /tmp/petrispot-output-8143362006049179270.kers
Total runtime 6 ms.
[2026-05-24 20:17:23] [INFO ] After 60ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:4
[2026-05-24 20:17:23] [INFO ] [Nat]Absence check using 18 positive place invariants in 2 ms returned sat
[2026-05-24 20:17:24] [INFO ] After 138ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :4
TRAPS : Iteration 0
[2026-05-24 20:17:24] [INFO ] After 244ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :4
[2026-05-24 20:17:24] [INFO ] After 435ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :4
[2026-05-24 20:17:24] [INFO ] Flatten gal took : 6 ms
[2026-05-24 20:17:24] [INFO ] Flatten gal took : 6 ms
[2026-05-24 20:17:24] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality10342319134926917457.gal : 2 ms
[2026-05-24 20:17:24] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality10815773471717879543.prop : 1 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality10342319134926917457.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality10815773471717879543.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/ReachabilityCardinality10815773471717879543.prop.
SDD proceeding with computation,4 properties remain. new max is 4
SDD size :1 after 3
SDD proceeding with computation,4 properties remain. new max is 8
SDD size :3 after 36
SDD proceeding with computation,4 properties remain. new max is 16
SDD size :36 after 576
SDD proceeding with computation,4 properties remain. new max is 32
SDD size :576 after 221184
SDD proceeding with computation,4 properties remain. new max is 64
SDD size :221184 after 1.01922e+09
SDD proceeding with computation,4 properties remain. new max is 128
SDD size :1.01922e+09 after 9.17294e+10
Detected timeout of ITS tools.
[2026-05-24 20:17:39] [INFO ] Flatten gal took : 6 ms
[2026-05-24 20:17:39] [INFO ] Applying decomposition
[2026-05-24 20:17:39] [INFO ] Flatten gal took : 5 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202604301425/bin/convert-linux64' '-i' '/tmp/graph12457103913593974944.txt' '-o' '/tmp/graph12457103913593974944.bin' '-w' '/tmp/graph12457103913593974944.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202604301425/bin/louvain-linux64' '/tmp/graph12457103913593974944.bin' '-l' '-1' '-v' '-w' '/tmp/graph12457103913593974944.weights' '-q' '0' '-e' '0.001'
[2026-05-24 20:17:39] [INFO ] Decomposing Gal with order
[2026-05-24 20:17:39] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-24 20:17:39] [INFO ] Removed a total of 71 redundant transitions.
[2026-05-24 20:17:39] [INFO ] Flatten gal took : 61 ms
[2026-05-24 20:17:39] [INFO ] Fuse similar labels procedure discarded/fused a total of 6 labels/synchronizations in 7 ms.
[2026-05-24 20:17:39] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality522813763713304671.gal : 3 ms
[2026-05-24 20:17:39] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality5289426522006605087.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality522813763713304671.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality5289426522006605087.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 ...327
Loading property file /tmp/ReachabilityCardinality5289426522006605087.prop.
SDD proceeding with computation,4 properties remain. new max is 4
SDD size :1 after 9
SDD proceeding with computation,4 properties remain. new max is 8
SDD size :9 after 108
SDD proceeding with computation,4 properties remain. new max is 16
SDD size :108 after 2304
SDD proceeding with computation,4 properties remain. new max is 32
SDD size :2304 after 147528
SDD proceeding with computation,4 properties remain. new max is 64
SDD size :147528 after 221184
SDD proceeding with computation,4 properties remain. new max is 128
SDD size :221184 after 9.78447e+10
Detected timeout of ITS tools.
Over-approximation ignoring read arcs solved 0 properties in 31111 ms.
ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
[2026-05-24 20:17:55] [INFO ] Flatten gal took : 548 ms
[2026-05-24 20:17:55] [INFO ] Applying decomposition
[2026-05-24 20:17:55] [INFO ] Flatten gal took : 411 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202604301425/bin/convert-linux64' '-i' '/tmp/graph5763545441494982459.txt' '-o' '/tmp/graph5763545441494982459.bin' '-w' '/tmp/graph5763545441494982459.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202604301425/bin/louvain-linux64' '/tmp/graph5763545441494982459.bin' '-l' '-1' '-v' '-w' '/tmp/graph5763545441494982459.weights' '-q' '0' '-e' '0.001'
[2026-05-24 20:17:57] [INFO ] Decomposing Gal with order
[2026-05-24 20:17:58] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-24 20:18:02] [INFO ] Removed a total of 15965 redundant transitions.
[2026-05-24 20:18:02] [INFO ] Flatten gal took : 1675 ms
[2026-05-24 20:18:04] [INFO ] Fuse similar labels procedure discarded/fused a total of 3107 labels/synchronizations in 817 ms.
[2026-05-24 20:18:07] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality7052916736817794235.gal : 165 ms
[2026-05-24 20:18:07] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality18273631375661558158.prop : 1 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality7052916736817794235.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality18273631375661558158.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 ...329
Loading property file /tmp/ReachabilityCardinality18273631375661558158.prop.
SDD proceeding with computation,4 properties remain. new max is 4
SDD size :1 after 4
SDD proceeding with computation,4 properties remain. new max is 8
SDD size :4 after 9
SDD proceeding with computation,4 properties remain. new max is 16
SDD size :9 after 18
SDD proceeding with computation,4 properties remain. new max is 32
SDD size :18 after 24
SDD proceeding with computation,4 properties remain. new max is 64
SDD size :24 after 42
SDD proceeding with computation,4 properties remain. new max is 128
SDD size :42 after 86
SDD proceeding with computation,4 properties remain. new max is 256
SDD size :86 after 99
SDD proceeding with computation,4 properties remain. new max is 512
SDD size :99 after 107
SDD proceeding with computation,4 properties remain. new max is 1024
SDD size :107 after 111
SDD proceeding with computation,4 properties remain. new max is 2048
SDD size :111 after 115
SDD proceeding with computation,4 properties remain. new max is 4096
SDD size :115 after 121
SDD proceeding with computation,4 properties remain. new max is 8192
SDD size :121 after 127
SDD proceeding with computation,4 properties remain. new max is 16384
SDD size :127 after 139
SDD proceeding with computation,4 properties remain. new max is 32768
SDD size :139 after 232
SDD proceeding with computation,4 properties remain. new max is 65536
SDD size :232 after 14961
SDD proceeding with computation,4 properties remain. new max is 131072
SDD size :14961 after 20101
SDD proceeding with computation,4 properties remain. new max is 262144
SDD size :20101 after 968218
Detected timeout of ITS tools.
[2026-05-24 20:48:09] [INFO ] Flatten gal took : 330 ms
Using solver Z3 to compute partial order matrices.
Built C files in :
/tmp/ltsmin16350731240913851135
[2026-05-24 20:48:10] [INFO ] Too many transitions (13161) to apply POR reductions. Disabling POR matrices.
[2026-05-24 20:48:26] [INFO ] Applying decomposition
[2026-05-24 20:48:27] [INFO ] Built C files in 17563ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin16350731240913851135
Running compilation step : cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/limit_time.pl' '180' 'gcc' '-c' '-I/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/include/' '-I.' '-std=c99' '-fPIC' '-O0' 'model.c'
[2026-05-24 20:48:28] [INFO ] Flatten gal took : 2180 ms
Converted graph to binary with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202604301425/bin/convert-linux64' '-i' '/tmp/graph12958597391300384766.txt' '-o' '/tmp/graph12958597391300384766.bin' '-w' '/tmp/graph12958597391300384766.weights'
Built communities with : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202604301425/bin/louvain-linux64' '/tmp/graph12958597391300384766.bin' '-l' '-1' '-v' '-w' '/tmp/graph12958597391300384766.weights' '-q' '0' '-e' '0.001'
[2026-05-24 20:48:31] [INFO ] Decomposing Gal with order
[2026-05-24 20:48:31] [INFO ] Rewriting arrays to variables to allow decomposition.
[2026-05-24 20:48:33] [INFO ] Removed a total of 13110 redundant transitions.
[2026-05-24 20:48:34] [INFO ] Flatten gal took : 1515 ms
[2026-05-24 20:48:36] [INFO ] Fuse similar labels procedure discarded/fused a total of 12361 labels/synchronizations in 1816 ms.
[2026-05-24 20:48:38] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality13553765530033190248.gal : 53 ms
[2026-05-24 20:48:38] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality12729879649500548377.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202604301425/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality13553765530033190248.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality12729879649500548377.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/ReachabilityCardinality12729879649500548377.prop.
Compilation finished in 107315 ms.
Running link step : cd /tmp/ltsmin16350731240913851135;'gcc' '-shared' '-o' 'gal.so' 'model.o'
Link finished in 133 ms.
Running LTSmin : cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/pins2lts-seq-linux64' './gal.so' '-p' '--pins-guards' '--when' '-i' 'CANConstructionPT080ReachabilityCardinality202400==true'
SDD proceeding with computation,4 properties remain. new max is 4
SDD size :1 after 4
SDD proceeding with computation,4 properties remain. new max is 8
SDD size :4 after 85
SDD proceeding with computation,4 properties remain. new max is 16
SDD size :85 after 88
SDD proceeding with computation,4 properties remain. new max is 32
SDD size :88 after 90
SDD proceeding with computation,4 properties remain. new max is 64
SDD size :90 after 96
SDD proceeding with computation,4 properties remain. new max is 128
SDD size :96 after 175
SDD proceeding with computation,4 properties remain. new max is 256
SDD size :175 after 257
SDD proceeding with computation,4 properties remain. new max is 512
SDD size :257 after 9085
SDD proceeding with computation,4 properties remain. new max is 1024
SDD size :9085 after 9287
SDD proceeding with computation,4 properties remain. new max is 2048
SDD size :9287 after 12606
WARNING : LTSmin timed out (>225 s) on command cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/pins2lts-seq-linux64' './gal.so' '-p' '--pins-guards' '--when' '-i' 'CANConstructionPT080ReachabilityCardinality202400==true'
Running LTSmin : cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/pins2lts-seq-linux64' './gal.so' '-p' '--pins-guards' '--when' '-i' 'CANConstructionPT080ReachabilityCardinality202403==true'
SDD proceeding with computation,4 properties remain. new max is 4096
SDD size :12606 after 464712
WARNING : LTSmin timed out (>225 s) on command cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/pins2lts-seq-linux64' './gal.so' '-p' '--pins-guards' '--when' '-i' 'CANConstructionPT080ReachabilityCardinality202403==true'
Running LTSmin : cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/pins2lts-seq-linux64' './gal.so' '-p' '--pins-guards' '--when' '-i' 'CANConstructionPT080ReachabilityCardinality202404==true'
SDD proceeding with computation,4 properties remain. new max is 8192
SDD size :464712 after 473853
WARNING : LTSmin timed out (>225 s) on command cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/pins2lts-seq-linux64' './gal.so' '-p' '--pins-guards' '--when' '-i' 'CANConstructionPT080ReachabilityCardinality202404==true'
Running LTSmin : cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/pins2lts-seq-linux64' './gal.so' '-p' '--pins-guards' '--when' '-i' 'CANConstructionPT080ReachabilityCardinality202407==true'
SDD proceeding with computation,4 properties remain. new max is 16384
SDD size :473853 after 561145
WARNING : LTSmin timed out (>225 s) on command cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/pins2lts-seq-linux64' './gal.so' '-p' '--pins-guards' '--when' '-i' 'CANConstructionPT080ReachabilityCardinality202407==true'
Retrying LTSmin with larger timeout 7200 s
Running LTSmin : cd /tmp/ltsmin16350731240913851135;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202604301425/bin/pins2lts-seq-linux64' './gal.so' '-p' '--pins-guards' '--when' '-i' 'CANConstructionPT080ReachabilityCardinality202400==true'

BK_TIME_CONFINEMENT_REACHED

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

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution ReachabilityCardinality -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_1.0.0.202604301425.jar
+ VERSION=202604301425
+ echo 'Running Version 202604301425'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityCardinality -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="CANConstruction-PT-080"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="itstools"
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 itstools"
echo " Input is CANConstruction-PT-080, examination is ReachabilityCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r034-tall-177946842100678"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/CANConstruction-PT-080.tgz
mv CANConstruction-PT-080 execution
cd execution
if [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "UpperBounds" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] || [ "ReachabilityCardinality" = "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 [ "ReachabilityCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityCardinality" != "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 "ReachabilityCardinality.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 '' ReachabilityCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityCardinality"
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 ;