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.r194-tall-177969914100428.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 NQueens-PT-20, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r194-tall-177969914100428
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 836K
-rw-r--r-- 1 mcc users 6.8K Mar 8 06:31 CTLCardinality.txt
-rw-r--r-- 1 mcc users 68K Mar 8 06:31 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.3K Mar 8 06:31 CTLFireability.txt
-rw-r--r-- 1 mcc users 51K Mar 8 06:31 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Mar 3 18:30 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K Mar 3 18:30 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.9K Mar 16 08:19 LTLCardinality.txt
-rw-r--r-- 1 mcc users 27K Mar 16 08:19 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.7K Mar 16 08:19 LTLFireability.txt
-rw-r--r-- 1 mcc users 20K Mar 16 08:19 LTLFireability.xml
-rw-r--r-- 1 mcc users 14K Mar 8 06:31 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 151K Mar 8 06:31 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 11K Mar 8 06:31 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 75K Mar 8 06:31 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Mar 16 08:19 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Mar 16 08:19 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 equiv_col
-rw-r--r-- 1 mcc users 3 Mar 3 18:30 instance
-rw-r--r-- 1 mcc users 6 Mar 3 18:30 iscolored
-rw-r--r-- 1 mcc users 349K 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 NQueens-PT-20-LTLFireability-00
FORMULA_NAME NQueens-PT-20-LTLFireability-01
FORMULA_NAME NQueens-PT-20-LTLFireability-02
FORMULA_NAME NQueens-PT-20-LTLFireability-03
FORMULA_NAME NQueens-PT-20-LTLFireability-04
FORMULA_NAME NQueens-PT-20-LTLFireability-05
FORMULA_NAME NQueens-PT-20-LTLFireability-06
FORMULA_NAME NQueens-PT-20-LTLFireability-07
FORMULA_NAME NQueens-PT-20-LTLFireability-08
FORMULA_NAME NQueens-PT-20-LTLFireability-09
FORMULA_NAME NQueens-PT-20-LTLFireability-10
FORMULA_NAME NQueens-PT-20-LTLFireability-11
FORMULA_NAME NQueens-PT-20-LTLFireability-12
FORMULA_NAME NQueens-PT-20-LTLFireability-13
FORMULA_NAME NQueens-PT-20-LTLFireability-14
FORMULA_NAME NQueens-PT-20-LTLFireability-15

=== Now, execution of the tool begins

BK_START 1779775374334

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=LTLFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=NQueens-PT-20
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
LTLFireability PT
Running Version 202604301425
[2026-05-26 06:02:55] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLFireability, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2026-05-26 06:02:55] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2026-05-26 06:02:55] [INFO ] Load time of PNML (sax parser for PT used): 103 ms
[2026-05-26 06:02:55] [INFO ] Transformed 520 places.
[2026-05-26 06:02:55] [INFO ] Transformed 400 transitions.
[2026-05-26 06:02:55] [INFO ] Found NUPN structural information;
[2026-05-26 06:02:55] [INFO ] Parsed PT model containing 520 places and 400 transitions and 2000 arcs in 189 ms.
Parsed 16 properties from file /home/mcc/execution/LTLFireability.xml in 8 ms.
Working with output stream class java.io.PrintStream
Initial state reduction rules removed 3 formulas.
Reduce places removed 2 places and 0 transitions.
FORMULA NQueens-PT-20-LTLFireability-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-20-LTLFireability-08 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-20-LTLFireability-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 77 out of 518 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 518/518 places, 400/400 transitions.
Reduce places removed 400 places and 0 transitions.
Iterating post reduction 0 with 400 rules applied. Total rules applied 400 place count 118 transition count 400
Applied a total of 400 rules in 19 ms. Remains 118 /518 variables (removed 400) and now considering 400/400 (removed 0) transitions.
Running PetriSpot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.petrispot.binaries_1.0.0.202604301425/bin/petri64' '--loadKERS=/tmp/petrispot-input-3520069518763812089.kers' '--Pflows' '--basisKERS=/tmp/petrispot-output-4942050468614049522.kers'
[2026-05-26 06:02:55] [INFO ] Running PetriSpot with arguments : [--loadKERS=/tmp/petrispot-input-3520069518763812089.kers, --Pflows, --basisKERS=/tmp/petrispot-output-4942050468614049522.kers]
Culled 0 columns in 0 ms.
// Phase 1: matrix 400 rows 118 cols 1600 entries
Finished phase 1 with 43 SingleSign rule and 68 generalized
[2026-05-26 06:02:55] [INFO ] Computed 7 invariants in 11 ms
Computed 7 P flows in 12 ms.
Exported basis to /tmp/petrispot-output-4942050468614049522.kers
Total runtime 12 ms.
[2026-05-26 06:02:57] [INFO ] Implicit Places using invariants in 1835 ms returned []
[2026-05-26 06:02:57] [INFO ] Invariant cache hit.
[2026-05-26 06:04:14] [INFO ] Performed 12/118 implicitness test of which 0 returned IMPLICIT in 61 seconds.
[2026-05-26 06:05:00] [INFO ] Performed 13/118 implicitness test of which 0 returned IMPLICIT in 108 seconds.
[2026-05-26 06:05:37] [INFO ] Implicit Places using invariants and state equation in 160007 ms returned []
Implicit Place search using SMT with State Equation took 161878 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 1ms
Starting structural reductions in LTL mode, iteration 1 : 118/518 places, 400/400 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 161945 ms. Remains : 118/518 places, 400/400 transitions.
Starting structural reductions in LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 5 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:05:37] [INFO ] Invariant cache hit.
[2026-05-26 06:05:39] [INFO ] Implicit Places using invariants in 1620 ms returned []
[2026-05-26 06:05:39] [INFO ] Invariant cache hit.
[2026-05-26 06:07:15] [INFO ] Performed 12/118 implicitness test of which 0 returned IMPLICIT in 81 seconds.
[2026-05-26 06:08:19] [INFO ] Implicit Places using invariants and state equation in 160009 ms returned []
Implicit Place search using SMT with State Equation took 161636 ms to find 0 implicit places.
Skipped dead transition search.
Finished structural reductions in LTL mode , in 1 iterations and 161643 ms. Remains : 118/118 places, 400/400 transitions.
Support contains 77 out of 118 places after structural reductions.
[2026-05-26 06:08:19] [INFO ] Flatten gal took : 74 ms
[2026-05-26 06:08:19] [INFO ] Flatten gal took : 35 ms
[2026-05-26 06:08:19] [INFO ] Input system was already deterministic with 400 transitions.
Reduction of identical properties reduced properties to check from 34 to 32
RANDOM walk for 154 steps (7 resets) in 111 ms. (1 steps per ms) remains 0/32 properties
FORMULA NQueens-PT-20-LTLFireability-11 FALSE TECHNIQUES REACHABILITY_KNOWLEDGE
Computed a total of 118 stabilizing places and 400 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 118 transition count 400
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(F(p0))))'
Support contains 4 out of 118 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 9 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:08:20] [INFO ] Invariant cache hit.
[2026-05-26 06:08:26] [INFO ] Implicit Places using invariants in 5660 ms returned []
[2026-05-26 06:08:26] [INFO ] Invariant cache hit.
[2026-05-26 06:09:22] [INFO ] Performed 1/118 implicitness test of which 0 returned IMPLICIT in 42 seconds.
[2026-05-26 06:10:10] [INFO ] Performed 3/118 implicitness test of which 0 returned IMPLICIT in 89 seconds.
[2026-05-26 06:10:55] [INFO ] Performed 4/118 implicitness test of which 0 returned IMPLICIT in 135 seconds.
[2026-05-26 06:10:55] [INFO ] Timeout of Implicit test with SMT after 135 seconds.
[2026-05-26 06:10:55] [INFO ] Implicit Places using invariants and state equation in 149736 ms returned []
Implicit Place search using SMT with State Equation took 155400 ms to find 0 implicit places.
Skipped dead transition search.
Finished structural reductions in LTL mode , in 1 iterations and 155411 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(F(p0))))'
Stuttering acceptance computed with spot in 233 ms :[(NOT p0), (NOT p0), (NOT p0)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-00
Product exploration explored 100000 steps with 15783 reset in 4419 ms.
Product exploration explored 100000 steps with 15815 reset in 4349 ms.
Computed a total of 118 stabilizing places and 400 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 118 transition count 400
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge : F ( (Ga|G!a) & (Gb|G!b)...)
Property proved to be true by K+ with min(!phi)
Knowledge based reduction with 2 factoid took 11 ms. Proved property starting from automaton with 3 states, 3 edges and 1 AP (stutter sensitive
Knowledge-based reduction took 349 ms.
FORMULA NQueens-PT-20-LTLFireability-00 TRUE TECHNIQUES KNOWLEDGE
Treatment of property NQueens-PT-20-LTLFireability-00 finished in 164831 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F(G(p0)))'
Support contains 4 out of 118 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 14 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:11:05] [INFO ] Invariant cache hit.
[2026-05-26 06:11:10] [INFO ] Implicit Places using invariants in 5546 ms returned []
[2026-05-26 06:11:10] [INFO ] Invariant cache hit.
[2026-05-26 06:12:19] [INFO ] Performed 1/118 implicitness test of which 0 returned IMPLICIT in 54 seconds.
[2026-05-26 06:13:33] [INFO ] Performed 3/118 implicitness test of which 0 returned IMPLICIT in 127 seconds.
[2026-05-26 06:13:33] [INFO ] Timeout of Implicit test with SMT after 127 seconds.
[2026-05-26 06:13:33] [INFO ] Implicit Places using invariants and state equation in 142654 ms returned []
Implicit Place search using SMT with State Equation took 148203 ms to find 0 implicit places.
[2026-05-26 06:13:33] [INFO ] Redundant transitions in 25 ms returned []
Skipped dead transition search.
Finished structural reductions in SI_LTL mode , in 1 iterations and 148251 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F(G(p0)))'
Stuttering acceptance computed with spot in 45 ms :[(NOT p0)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-01
Stuttering criterion allowed to conclude after 17 steps with 0 reset in 2 ms.
FORMULA NQueens-PT-20-LTLFireability-01 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-20-LTLFireability-01 finished in 148325 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((X(((X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0))))) U (G((X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0))))))||((!p2 U (p3||G(!p2)))&&(X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0))))))))) U (X(G((X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0)))))))||(X(((X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0))))) U (G((X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0))))))||((!p2 U (p3||G(!p2)))&&(X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0)))))))))&&p4))))'
Support contains 19 out of 118 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 6 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:13:33] [INFO ] Invariant cache hit.
[2026-05-26 06:13:38] [INFO ] Implicit Places using invariants in 4644 ms returned []
[2026-05-26 06:13:38] [INFO ] Invariant cache hit.
[2026-05-26 06:14:25] [INFO ] Performed 3/118 implicitness test of which 0 returned IMPLICIT in 32 seconds.
[2026-05-26 06:15:16] [INFO ] Performed 5/118 implicitness test of which 0 returned IMPLICIT in 83 seconds.
[2026-05-26 06:15:49] [INFO ] Performed 6/118 implicitness test of which 0 returned IMPLICIT in 116 seconds.
[2026-05-26 06:16:18] [INFO ] Implicit Places using invariants and state equation in 160008 ms returned []
Implicit Place search using SMT with State Equation took 164654 ms to find 0 implicit places.
Skipped dead transition search.
Finished structural reductions in LTL mode , in 1 iterations and 164660 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((X(((X(X(!p0)) U (X(X(G(!p0)))||(!p1&&X(X(!p0))))) U (G((X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0))))))||((!p2 U (p3||G(!p2)))&&(X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0))))))))) U (X(G((X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0)))))))||(X(((X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0))))) U (G((X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0))))))||((!p2 U (p3||G(!p2)))&&(X(X(!p0)) U ((!p1&&X(X(!p0)))||X(X(G(!p0)))))))))&&p4))))'
Stuttering acceptance computed with spot in 790 ms :[p0, p0, p0, p0, true, p0, p0, p0, p0, p0, p0, p0, p0, p0, p0, p0, (AND p0 p2 (NOT p3)), (AND (NOT p3) p2)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-02
Entered a terminal (fully accepting) state of product in 44 steps with 3 reset in 5 ms.
FORMULA NQueens-PT-20-LTLFireability-02 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-20-LTLFireability-02 finished in 165586 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((F((X(G((p1 U X(p2))))&&p0)) U (!p3||G(p1))))'
Support contains 10 out of 118 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 4 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:16:19] [INFO ] Invariant cache hit.
[2026-05-26 06:16:24] [INFO ] Implicit Places using invariants in 5261 ms returned []
[2026-05-26 06:16:24] [INFO ] Invariant cache hit.
[2026-05-26 06:17:25] [INFO ] Performed 2/118 implicitness test of which 0 returned IMPLICIT in 46 seconds.
[2026-05-26 06:17:55] [INFO ] Performed 3/118 implicitness test of which 0 returned IMPLICIT in 76 seconds.
[2026-05-26 06:18:29] [INFO ] Performed 4/118 implicitness test of which 0 returned IMPLICIT in 110 seconds.
[2026-05-26 06:19:02] [INFO ] Performed 5/118 implicitness test of which 0 returned IMPLICIT in 143 seconds.
[2026-05-26 06:19:02] [INFO ] Timeout of Implicit test with SMT after 143 seconds.
[2026-05-26 06:19:02] [INFO ] Implicit Places using invariants and state equation in 158423 ms returned []
Implicit Place search using SMT with State Equation took 163686 ms to find 0 implicit places.
Skipped dead transition search.
Finished structural reductions in LTL mode , in 1 iterations and 163691 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((F((X(G((p1 U X(p2))))&&p0)) U (!p3||G(p1))))'
Stuttering acceptance computed with spot in 306 ms :[(AND (NOT p1) p3), (OR (NOT p0) (NOT p2)), (NOT p2), (OR (AND (NOT p0) (NOT p1)) (AND (NOT p1) (NOT p2))), (AND (NOT p1) (NOT p2)), (NOT p2), (NOT p2), (NOT p2)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-03
Stuttering criterion allowed to conclude after 22 steps with 1 reset in 1 ms.
FORMULA NQueens-PT-20-LTLFireability-03 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-20-LTLFireability-03 finished in 164048 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(F(p0)))'
Support contains 4 out of 118 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 13 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:19:03] [INFO ] Invariant cache hit.
[2026-05-26 06:19:08] [INFO ] Implicit Places using invariants in 5644 ms returned []
[2026-05-26 06:19:08] [INFO ] Invariant cache hit.
[2026-05-26 06:19:56] [INFO ] Performed 1/118 implicitness test of which 0 returned IMPLICIT in 32 seconds.
[2026-05-26 06:20:49] [INFO ] Performed 2/118 implicitness test of which 0 returned IMPLICIT in 85 seconds.
[2026-05-26 06:21:37] [INFO ] Performed 3/118 implicitness test of which 0 returned IMPLICIT in 133 seconds.
[2026-05-26 06:21:37] [INFO ] Timeout of Implicit test with SMT after 133 seconds.
[2026-05-26 06:21:37] [INFO ] Implicit Places using invariants and state equation in 148593 ms returned []
Implicit Place search using SMT with State Equation took 154239 ms to find 0 implicit places.
[2026-05-26 06:21:37] [INFO ] Redundant transitions in 14 ms returned []
Skipped dead transition search.
Finished structural reductions in SI_LTL mode , in 1 iterations and 154271 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(F(p0)))'
Stuttering acceptance computed with spot in 64 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-05
Stuttering criterion allowed to conclude after 17 steps with 0 reset in 1 ms.
FORMULA NQueens-PT-20-LTLFireability-05 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-20-LTLFireability-05 finished in 154356 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((F(p0)&&X(F((!p1 U (p2||G(!p1)))))))'
Support contains 12 out of 118 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 4 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:21:37] [INFO ] Invariant cache hit.
[2026-05-26 06:21:42] [INFO ] Implicit Places using invariants in 5148 ms returned []
[2026-05-26 06:21:42] [INFO ] Invariant cache hit.
[2026-05-26 06:22:44] [INFO ] Performed 2/118 implicitness test of which 0 returned IMPLICIT in 46 seconds.
[2026-05-26 06:23:41] [INFO ] Performed 3/118 implicitness test of which 0 returned IMPLICIT in 104 seconds.
[2026-05-26 06:24:22] [INFO ] Performed 5/118 implicitness test of which 0 returned IMPLICIT in 145 seconds.
[2026-05-26 06:24:22] [INFO ] Timeout of Implicit test with SMT after 145 seconds.
[2026-05-26 06:24:22] [INFO ] Implicit Places using invariants and state equation in 160014 ms returned []
Implicit Place search using SMT with State Equation took 165165 ms to find 0 implicit places.
Skipped dead transition search.
Finished structural reductions in LTL mode , in 1 iterations and 165169 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((F(p0)&&X(F((!p1 U (p2||G(!p1)))))))'
Stuttering acceptance computed with spot in 121 ms :[(OR (NOT p0) (AND p1 (NOT p2))), (NOT p0), (AND (NOT p2) p1)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-06
Product exploration explored 100000 steps with 17700 reset in 4475 ms.
Product exploration explored 100000 steps with 17547 reset in 4544 ms.
Computed a total of 118 stabilizing places and 400 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 118 transition count 400
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge : F ( (Ga|G!a) & (Gb|G!b)...)
Property proved to be true by K+ with min(!phi)
Knowledge based reduction with 4 factoid took 12 ms. Proved property starting from automaton with 3 states, 5 edges and 3 AP (stutter sensitive
Knowledge-based reduction took 338 ms.
FORMULA NQueens-PT-20-LTLFireability-06 TRUE TECHNIQUES KNOWLEDGE
Treatment of property NQueens-PT-20-LTLFireability-06 finished in 174683 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((F(p0)&&F(p1)&&F(G(p2)))))'
Support contains 11 out of 118 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 9 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:24:32] [INFO ] Invariant cache hit.
[2026-05-26 06:24:37] [INFO ] Implicit Places using invariants in 5138 ms returned []
[2026-05-26 06:24:37] [INFO ] Invariant cache hit.
[2026-05-26 06:25:37] [INFO ] Performed 2/118 implicitness test of which 0 returned IMPLICIT in 45 seconds.
[2026-05-26 06:26:14] [INFO ] Performed 3/118 implicitness test of which 0 returned IMPLICIT in 82 seconds.
[2026-05-26 06:26:47] [INFO ] Performed 4/118 implicitness test of which 0 returned IMPLICIT in 115 seconds.
[2026-05-26 06:27:17] [INFO ] Implicit Places using invariants and state equation in 160009 ms returned []
Implicit Place search using SMT with State Equation took 165149 ms to find 0 implicit places.
[2026-05-26 06:27:17] [INFO ] Redundant transitions in 9 ms returned []
Skipped dead transition search.
Finished structural reductions in SI_LTL mode , in 1 iterations and 165171 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((F(p0)&&F(p1)&&F(G(p2)))))'
Stuttering acceptance computed with spot in 128 ms :[(OR (NOT p0) (NOT p1) (NOT p2)), (NOT p0), (NOT p1), (NOT p2)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-07
Stuttering criterion allowed to conclude after 18 steps with 0 reset in 1 ms.
FORMULA NQueens-PT-20-LTLFireability-07 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-20-LTLFireability-07 finished in 165325 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((G(p0)||X(p1)))'
Support contains 11 out of 118 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 3 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:27:17] [INFO ] Invariant cache hit.
[2026-05-26 06:27:22] [INFO ] Implicit Places using invariants in 5210 ms returned []
[2026-05-26 06:27:22] [INFO ] Invariant cache hit.
[2026-05-26 06:28:23] [INFO ] Performed 1/118 implicitness test of which 0 returned IMPLICIT in 45 seconds.
[2026-05-26 06:29:10] [INFO ] Performed 2/118 implicitness test of which 0 returned IMPLICIT in 93 seconds.
[2026-05-26 06:29:41] [INFO ] Performed 4/118 implicitness test of which 0 returned IMPLICIT in 123 seconds.
[2026-05-26 06:29:41] [INFO ] Timeout of Implicit test with SMT after 123 seconds.
[2026-05-26 06:29:41] [INFO ] Implicit Places using invariants and state equation in 138232 ms returned []
Implicit Place search using SMT with State Equation took 143444 ms to find 0 implicit places.
Skipped dead transition search.
Finished structural reductions in LTL mode , in 1 iterations and 143447 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((G(p0)||X(p1)))'
Stuttering acceptance computed with spot in 145 ms :[true, (NOT p1), (AND (NOT p1) (NOT p0)), (AND (NOT p0) (NOT p1)), (NOT p0)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-09
Entered a terminal (fully accepting) state of product in 4 steps with 0 reset in 1 ms.
FORMULA NQueens-PT-20-LTLFireability-09 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-20-LTLFireability-09 finished in 143623 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(((G(p0) U p1) U X(p2)))'
Support contains 12 out of 118 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 3 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:29:41] [INFO ] Invariant cache hit.
[2026-05-26 06:29:46] [INFO ] Implicit Places using invariants in 5001 ms returned []
[2026-05-26 06:29:46] [INFO ] Invariant cache hit.
[2026-05-26 06:31:54] [INFO ] Performed 1/118 implicitness test of which 0 returned IMPLICIT in 114 seconds.
[2026-05-26 06:32:26] [INFO ] Performed 2/118 implicitness test of which 0 returned IMPLICIT in 145 seconds.
[2026-05-26 06:32:26] [INFO ] Timeout of Implicit test with SMT after 145 seconds.
[2026-05-26 06:32:26] [INFO ] Implicit Places using invariants and state equation in 160007 ms returned []
Implicit Place search using SMT with State Equation took 165009 ms to find 0 implicit places.
Skipped dead transition search.
Finished structural reductions in LTL mode , in 1 iterations and 165014 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(((G(p0) U p1) U X(p2)))'
Stuttering acceptance computed with spot in 261 ms :[(NOT p2), (NOT p2), (OR (AND (NOT p0) (NOT p2)) (AND (NOT p1) (NOT p2))), (NOT p2), true, (NOT p0), (NOT p1)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-10
Entered a terminal (fully accepting) state of product in 32 steps with 13 reset in 1 ms.
FORMULA NQueens-PT-20-LTLFireability-10 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-20-LTLFireability-10 finished in 165318 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F(p0))'
Support contains 4 out of 118 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 4 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:32:26] [INFO ] Invariant cache hit.
[2026-05-26 06:32:32] [INFO ] Implicit Places using invariants in 5639 ms returned []
[2026-05-26 06:32:32] [INFO ] Invariant cache hit.
[2026-05-26 06:33:30] [INFO ] Performed 1/118 implicitness test of which 0 returned IMPLICIT in 43 seconds.
[2026-05-26 06:34:07] [INFO ] Performed 2/118 implicitness test of which 0 returned IMPLICIT in 80 seconds.
[2026-05-26 06:35:07] [INFO ] Performed 3/118 implicitness test of which 0 returned IMPLICIT in 140 seconds.
[2026-05-26 06:35:07] [INFO ] Timeout of Implicit test with SMT after 140 seconds.
[2026-05-26 06:35:07] [INFO ] Implicit Places using invariants and state equation in 155466 ms returned []
Implicit Place search using SMT with State Equation took 161106 ms to find 0 implicit places.
[2026-05-26 06:35:07] [INFO ] Redundant transitions in 2 ms returned []
Skipped dead transition search.
Finished structural reductions in SI_LTL mode , in 1 iterations and 161122 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F(p0))'
Stuttering acceptance computed with spot in 39 ms :[(NOT p0)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-12
Product exploration explored 100000 steps with 15832 reset in 4230 ms.
Product exploration explored 100000 steps with 15863 reset in 4250 ms.
Computed a total of 118 stabilizing places and 400 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 118 transition count 400
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge : F ( (Ga|G!a) & (Gb|G!b)...)
Property proved to be true by K+ with min(!phi)
Knowledge based reduction with 2 factoid took 16 ms. Proved property starting from automaton with 1 states, 1 edges and 1 AP (stutter insensitive
Knowledge-based reduction took 318 ms.
FORMULA NQueens-PT-20-LTLFireability-12 TRUE TECHNIQUES KNOWLEDGE
Treatment of property NQueens-PT-20-LTLFireability-12 finished in 169978 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F((G(F(!p0))||(F(!p0)&&X((!p1&&X((!p2||(!p3&&X(!p1))))))))))'
Support contains 15 out of 118 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 3 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:35:16] [INFO ] Invariant cache hit.
[2026-05-26 06:35:21] [INFO ] Implicit Places using invariants in 4905 ms returned []
[2026-05-26 06:35:21] [INFO ] Invariant cache hit.
[2026-05-26 06:36:17] [INFO ] Performed 2/118 implicitness test of which 0 returned IMPLICIT in 41 seconds.
[2026-05-26 06:36:49] [INFO ] Performed 3/118 implicitness test of which 0 returned IMPLICIT in 72 seconds.
[2026-05-26 06:37:58] [INFO ] Performed 5/118 implicitness test of which 0 returned IMPLICIT in 142 seconds.
[2026-05-26 06:37:58] [INFO ] Timeout of Implicit test with SMT after 142 seconds.
[2026-05-26 06:37:58] [INFO ] Implicit Places using invariants and state equation in 156748 ms returned []
Implicit Place search using SMT with State Equation took 161658 ms to find 0 implicit places.
Skipped dead transition search.
Finished structural reductions in LTL mode , in 1 iterations and 161661 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F((G(F(p0))||(F(p0)&&X((p1&&X(((p3&&X(p1))||p2))))))))'
Stuttering acceptance computed with spot in 273 ms :[(NOT p0), (NOT p0), (OR (AND (NOT p0) (NOT p2) (NOT p3)) (AND (NOT p0) (NOT p1))), (OR (AND (NOT p0) p1 (NOT p2) (NOT p3)) (AND (NOT p0) (NOT p1) (NOT p2) p3)), (OR (AND (NOT p0) (NOT p1) (NOT p2)) (AND (NOT p0) (NOT p2) (NOT p3))), (AND (NOT p0) (NOT p1)), (AND (NOT p0) (NOT p1)), (AND (NOT p0) (NOT p1) (NOT p2))]
Running random walk in product with property : NQueens-PT-20-LTLFireability-13
Product exploration explored 100000 steps with 15873 reset in 4351 ms.
Product exploration explored 100000 steps with 15825 reset in 4414 ms.
Computed a total of 118 stabilizing places and 400 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 118 transition count 400
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge : F ( (Ga|G!a) & (Gb|G!b)...)
Property proved to be true by K+ with min(!phi)
Knowledge based reduction with 5 factoid took 11 ms. Proved property starting from automaton with 8 states, 21 edges and 4 AP (stutter sensitive
Knowledge-based reduction took 351 ms.
FORMULA NQueens-PT-20-LTLFireability-13 TRUE TECHNIQUES KNOWLEDGE
Treatment of property NQueens-PT-20-LTLFireability-13 finished in 171092 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((((!X(p0) U p1)&&F(p0)) U X(p2)))'
Support contains 10 out of 118 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 118/118 places, 400/400 transitions.
Applied a total of 0 rules in 2 ms. Remains 118 /118 variables (removed 0) and now considering 400/400 (removed 0) transitions.
[2026-05-26 06:38:07] [INFO ] Invariant cache hit.
[2026-05-26 06:38:12] [INFO ] Implicit Places using invariants in 5294 ms returned []
[2026-05-26 06:38:12] [INFO ] Invariant cache hit.
[2026-05-26 06:40:14] [INFO ] Performed 2/118 implicitness test of which 0 returned IMPLICIT in 107 seconds.
[2026-05-26 06:40:52] [INFO ] Implicit Places using invariants and state equation in 160006 ms returned []
Implicit Place search using SMT with State Equation took 165304 ms to find 0 implicit places.
Skipped dead transition search.
Finished structural reductions in LTL mode , in 1 iterations and 165308 ms. Remains : 118/118 places, 400/400 transitions.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202604301425/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((((!X(p0) U p1)&&F(p0)) U X(p2)))'
Stuttering acceptance computed with spot in 241 ms :[(NOT p2), (AND (NOT p0) (NOT p2)), (OR (AND (NOT p1) (NOT p2)) (AND p0 (NOT p2))), (NOT p2), (NOT p0), true, (OR (NOT p1) p0)]
Running random walk in product with property : NQueens-PT-20-LTLFireability-15
Stuttering criterion allowed to conclude after 21 steps with 1 reset in 1 ms.
FORMULA NQueens-PT-20-LTLFireability-15 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-20-LTLFireability-15 finished in 165582 ms.
All properties solved by simple procedures.
Total runtime 2277701 ms.

BK_STOP 1779777653507

--------------------
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
+ [[ LTLFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution LTLFireability -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 LTLFireability -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="NQueens-PT-20"
export BK_EXAMINATION="LTLFireability"
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 NQueens-PT-20, examination is LTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r194-tall-177969914100428"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/NQueens-PT-20.tgz
mv NQueens-PT-20 execution
cd execution
if [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "UpperBounds" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] || [ "LTLFireability" = "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 [ "LTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLFireability" != "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 "LTLFireability.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 '' LTLFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLFireability"
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 ;