Execution Chart

Sorry, for this execution, no execution chart could be reported.

Trace from the execution

Formatting '/data/fkordon/mcc2025-input.r142-tall-174876812300316.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2025-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5832
Executing tool itstools
Input is NQueens-PT-15, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r142-tall-174876812300316
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 680K
-rw-r--r-- 1 mcc users 8.3K May 29 14:47 CTLCardinality.txt
-rw-r--r-- 1 mcc users 91K May 29 14:47 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.9K May 29 14:47 CTLFireability.txt
-rw-r--r-- 1 mcc users 59K May 29 14:47 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 29 14:32 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K May 29 14:32 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.7K May 29 14:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K May 29 14:47 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6K May 29 14:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K May 29 14:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 11K May 29 14:47 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 109K May 29 14:47 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 11K May 29 14:47 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 75K May 29 14:47 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K May 29 14:47 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K May 29 14:47 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 29 14:32 equiv_col
-rw-r--r-- 1 mcc users 3 May 29 14:32 instance
-rw-r--r-- 1 mcc users 6 May 29 14:32 iscolored
-rw-r--r-- 1 mcc users 203K May 29 14:32 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-15-LTLFireability-00
FORMULA_NAME NQueens-PT-15-LTLFireability-01
FORMULA_NAME NQueens-PT-15-LTLFireability-02
FORMULA_NAME NQueens-PT-15-LTLFireability-03
FORMULA_NAME NQueens-PT-15-LTLFireability-04
FORMULA_NAME NQueens-PT-15-LTLFireability-05
FORMULA_NAME NQueens-PT-15-LTLFireability-06
FORMULA_NAME NQueens-PT-15-LTLFireability-07
FORMULA_NAME NQueens-PT-15-LTLFireability-08
FORMULA_NAME NQueens-PT-15-LTLFireability-09
FORMULA_NAME NQueens-PT-15-LTLFireability-10
FORMULA_NAME NQueens-PT-15-LTLFireability-11
FORMULA_NAME NQueens-PT-15-LTLFireability-12
FORMULA_NAME NQueens-PT-15-LTLFireability-13
FORMULA_NAME NQueens-PT-15-LTLFireability-14
FORMULA_NAME NQueens-PT-15-LTLFireability-15

=== Now, execution of the tool begins

BK_START 1748864314060

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-15
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
LTLFireability PT
Running Version 202505121319
[2025-06-02 11:38:35] [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]
[2025-06-02 11:38:35] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2025-06-02 11:38:35] [INFO ] Load time of PNML (sax parser for PT used): 91 ms
[2025-06-02 11:38:35] [INFO ] Transformed 315 places.
[2025-06-02 11:38:35] [INFO ] Transformed 225 transitions.
[2025-06-02 11:38:35] [INFO ] Found NUPN structural information;
[2025-06-02 11:38:35] [INFO ] Parsed PT model containing 315 places and 225 transitions and 1125 arcs in 178 ms.
Parsed 16 properties from file /home/mcc/execution/LTLFireability.xml in 9 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-15-LTLFireability-02 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-15-LTLFireability-06 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-15-LTLFireability-10 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 67 out of 313 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 313/313 places, 225/225 transitions.
Reduce places removed 225 places and 0 transitions.
Iterating post reduction 0 with 225 rules applied. Total rules applied 225 place count 88 transition count 225
Applied a total of 225 rules in 15 ms. Remains 88 /313 variables (removed 225) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 88 cols
[2025-06-02 11:38:35] [INFO ] Computed 7 invariants in 35 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:38:36] [INFO ] Implicit Places using invariants in 620 ms returned []
[2025-06-02 11:38:36] [INFO ] Invariant cache hit.
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:38:44] [INFO ] Implicit Places using invariants and state equation in 8268 ms returned [30, 58, 59, 87]
Discarding 4 places :
Implicit Place search using SMT with State Equation took 8929 ms to find 4 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 84/313 places, 225/225 transitions.
Applied a total of 0 rules in 2 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 8960 ms. Remains : 84/313 places, 225/225 transitions.
Support contains 67 out of 84 places after structural reductions.
[2025-06-02 11:38:45] [INFO ] Flatten gal took : 46 ms
[2025-06-02 11:38:45] [INFO ] Flatten gal took : 29 ms
[2025-06-02 11:38:45] [INFO ] Input system was already deterministic with 225 transitions.
Reduction of identical properties reduced properties to check from 35 to 33
RANDOM walk for 90 steps (5 resets) in 32 ms. (2 steps per ms) remains 0/33 properties
Computed a total of 84 stabilizing places and 225 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 84 transition count 225
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_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X(X((!X((((p0 U p1) U p2)&&F(p0))) U p0)))))'
Support contains 12 out of 84 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 5 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:38:45] [INFO ] Invariants computation overflowed in 19 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:38:46] [INFO ] Implicit Places using invariants in 205 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:38:46] [INFO ] Invariants computation overflowed in 27 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:38:57] [INFO ] Implicit Places using invariants and state equation in 11093 ms returned []
Implicit Place search using SMT with State Equation took 11302 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in LTL mode , in 1 iterations and 11310 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 428 ms :[(NOT p0), (AND p1 p2), p2, p1, (NOT p0), (NOT p0), (NOT p0), true, (OR (NOT p0) p2)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-00
Entered a terminal (fully accepting) state of product in 24 steps with 5 reset in 3 ms.
FORMULA NQueens-PT-15-LTLFireability-00 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-00 finished in 11809 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(F((!p0 U (p1||G(!p0))))))'
Support contains 8 out of 84 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 10 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:38:57] [INFO ] Invariants computation overflowed in 9 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:38:57] [INFO ] Implicit Places using invariants in 108 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:38:57] [INFO ] Invariants computation overflowed in 11 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:39:15] [INFO ] Implicit Places using invariants and state equation in 17582 ms returned []
Implicit Place search using SMT with State Equation took 17696 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2025-06-02 11:39:15] [INFO ] Redundant transitions in 10 ms returned []
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in SI_LTL mode , in 1 iterations and 17725 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 71 ms :[(AND (NOT p1) p0), (AND (NOT p1) p0)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-01
Product exploration explored 100000 steps with 12275 reset in 2083 ms.
Product exploration explored 100000 steps with 12235 reset in 2018 ms.
Computed a total of 84 stabilizing places and 225 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 84 transition count 225
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)...)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Knowledge obtained : [(AND (NOT p1) p0), (F (G p1)), (F (G (NOT p0)))]
False Knowledge obtained : [(X (AND (NOT p1) p0)), (X (NOT (AND (NOT p1) p0))), (X p0), (X (NOT p0)), (X (AND (NOT p1) (NOT p0))), (X (NOT (AND (NOT p1) (NOT p0)))), (X p1), (X (NOT p1)), (X (X (AND (NOT p1) p0))), (X (X (NOT (AND (NOT p1) p0)))), (X (X p0)), (X (X (NOT p0))), (X (X (AND (NOT p1) (NOT p0)))), (X (X (NOT (AND (NOT p1) (NOT p0))))), (X (X p1)), (X (X (NOT p1)))]
Property proved to be true thanks to knowledge (Minato strategy)
Knowledge based reduction with 3 factoid took 17 ms. Reduced automaton from 2 states, 4 edges and 2 AP (stutter insensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA NQueens-PT-15-LTLFireability-01 TRUE TECHNIQUES KNOWLEDGE
Treatment of property NQueens-PT-15-LTLFireability-01 finished in 22074 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((F((F(p1)&&X(F(p2))&&p0)) U G(!p3)))'
Support contains 15 out of 84 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 2 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:39:19] [INFO ] Invariants computation overflowed in 17 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:39:19] [INFO ] Implicit Places using invariants in 93 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:39:19] [INFO ] Invariants computation overflowed in 18 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:39:30] [INFO ] Implicit Places using invariants and state equation in 10791 ms returned []
Implicit Place search using SMT with State Equation took 10900 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in LTL mode , in 1 iterations and 10903 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 157 ms :[p3, (OR (NOT p0) (NOT p1) (NOT p2)), (NOT p1), (NOT p2)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-03
Stuttering criterion allowed to conclude after 27 steps with 1 reset in 1 ms.
FORMULA NQueens-PT-15-LTLFireability-03 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-03 finished in 11087 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(((p0 U G(p1))||F(p2)))'
Support contains 11 out of 84 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 7 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:39:30] [INFO ] Invariants computation overflowed in 12 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:39:30] [INFO ] Implicit Places using invariants in 91 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:39:30] [INFO ] Invariants computation overflowed in 8 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:39:41] [INFO ] Implicit Places using invariants and state equation in 11059 ms returned []
Implicit Place search using SMT with State Equation took 11159 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2025-06-02 11:39:41] [INFO ] Redundant transitions in 11 ms returned []
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in SI_LTL mode , in 1 iterations and 11184 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 89 ms :[(AND (NOT p1) (NOT p2)), (NOT p2), (AND (NOT p2) (NOT p1))]
Running random walk in product with property : NQueens-PT-15-LTLFireability-04
Product exploration explored 100000 steps with 19147 reset in 2365 ms.
Product exploration explored 100000 steps with 19123 reset in 2400 ms.
Computed a total of 84 stabilizing places and 225 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 84 transition count 225
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)...)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Knowledge obtained : [(AND p1 p0 (NOT p2)), (F (G (NOT p1))), (F (G (NOT p0))), (F (G p2))]
False Knowledge obtained : [(X p2), (X (NOT p2)), (X (AND (NOT p1) (NOT p0) (NOT p2))), (X (NOT (AND (NOT p1) (NOT p0) (NOT p2)))), (X (AND p1 (NOT p2))), (X (NOT (AND p1 (NOT p2)))), (X (AND p1 p0 (NOT p2))), (X (NOT (AND p1 p0 (NOT p2)))), (X (AND (NOT p1) (NOT p2))), (X (NOT (AND (NOT p1) (NOT p2)))), (X (AND (NOT p1) p0 (NOT p2))), (X (NOT (AND (NOT p1) p0 (NOT p2)))), (X (AND p1 (NOT p0) (NOT p2))), (X (NOT (AND p1 (NOT p0) (NOT p2)))), (X p0), (X (NOT p0)), (X p1), (X (NOT p1)), (X (X p2)), (X (X (NOT p2))), (X (X (AND (NOT p1) (NOT p0) (NOT p2)))), (X (X (NOT (AND (NOT p1) (NOT p0) (NOT p2))))), (X (X (AND p1 (NOT p2)))), (X (X (NOT (AND p1 (NOT p2))))), (X (X (AND p1 p0 (NOT p2)))), (X (X (NOT (AND p1 p0 (NOT p2))))), (X (X (AND (NOT p1) (NOT p2)))), (X (X (NOT (AND (NOT p1) (NOT p2))))), (X (X (AND (NOT p1) p0 (NOT p2)))), (X (X (NOT (AND (NOT p1) p0 (NOT p2))))), (X (X (AND p1 (NOT p0) (NOT p2)))), (X (X (NOT (AND p1 (NOT p0) (NOT p2))))), (X (X p0)), (X (X (NOT p0))), (X (X p1)), (X (X (NOT p1)))]
Property proved to be true thanks to knowledge (Minato strategy)
Knowledge based reduction with 4 factoid took 12 ms. Reduced automaton from 3 states, 7 edges and 3 AP (stutter insensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA NQueens-PT-15-LTLFireability-04 TRUE TECHNIQUES KNOWLEDGE
Treatment of property NQueens-PT-15-LTLFireability-04 finished in 16190 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((X(X(X(p0)))||G(p1)))'
Support contains 8 out of 84 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 2 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:39:46] [INFO ] Invariants computation overflowed in 11 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:39:47] [INFO ] Implicit Places using invariants in 100 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:39:47] [INFO ] Invariants computation overflowed in 8 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:39:57] [INFO ] Implicit Places using invariants and state equation in 10931 ms returned []
Implicit Place search using SMT with State Equation took 11044 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in LTL mode , in 1 iterations and 11047 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 279 ms :[(NOT p0), (AND (NOT p0) (NOT p1)), (AND (NOT p1) (NOT p0)), (NOT p0), (AND (NOT p0) (NOT p1)), true, (NOT p0), (AND (NOT p0) (NOT p1)), (NOT p1)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-05
Entered a terminal (fully accepting) state of product in 22 steps with 3 reset in 2 ms.
FORMULA NQueens-PT-15-LTLFireability-05 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-05 finished in 11344 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((F((G(p1)&&p0))||(F(!p2) U p3))))'
Support contains 11 out of 84 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 7 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:39:58] [INFO ] Invariants computation overflowed in 15 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:39:58] [INFO ] Implicit Places using invariants in 85 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:39:58] [INFO ] Invariants computation overflowed in 8 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:40:09] [INFO ] Implicit Places using invariants and state equation in 11456 ms returned []
Implicit Place search using SMT with State Equation took 11544 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2025-06-02 11:40:09] [INFO ] Redundant transitions in 3 ms returned []
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in SI_LTL mode , in 1 iterations and 11563 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 196 ms :[(OR (AND (NOT p0) (NOT p3)) (AND (NOT p1) (NOT p3))), (OR (AND (NOT p0) (NOT p3)) (AND (NOT p1) (NOT p3))), (OR (AND (NOT p0) p2) (AND (NOT p1) p2)), (AND (NOT p1) (NOT p3)), (AND (NOT p1) p2)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-07
Stuttering criterion allowed to conclude after 21 steps with 1 reset in 2 ms.
FORMULA NQueens-PT-15-LTLFireability-07 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-07 finished in 11786 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(F(p0)))'
Support contains 8 out of 84 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 7 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:40:10] [INFO ] Invariants computation overflowed in 10 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:40:10] [INFO ] Implicit Places using invariants in 86 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:40:10] [INFO ] Invariants computation overflowed in 7 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:40:20] [INFO ] Implicit Places using invariants and state equation in 10697 ms returned []
Implicit Place search using SMT with State Equation took 10785 ms to find 0 implicit places.
Starting Z3 with timeout 200.0 s and query timeout 20000.0 ms
[2025-06-02 11:40:20] [INFO ] Redundant transitions in 7 ms returned []
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in SI_LTL mode , in 1 iterations and 10804 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 55 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-08
Stuttering criterion allowed to conclude after 20 steps with 3 reset in 1 ms.
FORMULA NQueens-PT-15-LTLFireability-08 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-08 finished in 10873 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((F((F(p1)&&p0)) U X((X(!p3)&&p2))))'
Support contains 15 out of 84 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 5 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:40:20] [INFO ] Invariants computation overflowed in 7 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:40:21] [INFO ] Implicit Places using invariants in 78 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:40:21] [INFO ] Invariants computation overflowed in 8 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:40:31] [INFO ] Implicit Places using invariants and state equation in 10800 ms returned []
Implicit Place search using SMT with State Equation took 10879 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in LTL mode , in 1 iterations and 10885 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 420 ms :[(OR (NOT p2) p3), (OR (AND (NOT p0) (NOT p2)) (AND (NOT p1) (NOT p2)) (AND (NOT p1) p3) (AND (NOT p0) p3)), (OR (NOT p2) p3), (OR (AND (NOT p1) (NOT p2)) (AND (NOT p1) p3)), (OR (NOT p0) (NOT p1)), (OR (AND (NOT p0) p2 p3) (AND (NOT p1) p2 p3)), (NOT p1), (AND (NOT p1) p3), (OR (AND (NOT p1) p3) (AND (NOT p0) p3)), p3, (AND (NOT p1) p3)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-09
Stuttering criterion allowed to conclude after 18 steps with 1 reset in 0 ms.
FORMULA NQueens-PT-15-LTLFireability-09 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-09 finished in 11328 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((X((p0||X(F(p1)))) U (!p0&&X(F(!p2)))))'
Support contains 16 out of 84 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 4 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:40:32] [INFO ] Invariants computation overflowed in 16 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:40:32] [INFO ] Implicit Places using invariants in 85 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:40:32] [INFO ] Invariants computation overflowed in 8 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:40:48] [INFO ] Implicit Places using invariants and state equation in 15914 ms returned []
Implicit Place search using SMT with State Equation took 16000 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in LTL mode , in 1 iterations and 16008 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 149 ms :[(OR p2 p0), (AND (NOT p0) (NOT p1)), p2, (NOT p1)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-11
Stuttering criterion allowed to conclude after 216 steps with 59 reset in 6 ms.
FORMULA NQueens-PT-15-LTLFireability-11 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-11 finished in 16181 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((G(F(p0))||(F(!p1) U ((X(!p0)&&F(!p1))||G(F(!p1))))))'
Support contains 7 out of 84 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 4 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:40:48] [INFO ] Invariants computation overflowed in 8 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:40:48] [INFO ] Implicit Places using invariants in 86 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:40:48] [INFO ] Invariants computation overflowed in 10 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:40:59] [INFO ] Implicit Places using invariants and state equation in 11094 ms returned []
Implicit Place search using SMT with State Equation took 11181 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in LTL mode , in 1 iterations and 11185 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 140 ms :[(AND (NOT p0) p1), false, (AND (NOT p0) p1), (AND (NOT p0) p1)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-12
Product exploration explored 100000 steps with 20123 reset in 2334 ms.
Product exploration explored 100000 steps with 19850 reset in 2342 ms.
Computed a total of 84 stabilizing places and 225 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 84 transition count 225
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)...)
Starting Z3 with timeout 6000.0 s and query timeout 600000.0 ms
Knowledge obtained : [(AND p0 p1), (F (G (NOT p0))), (F (G (NOT p1)))]
False Knowledge obtained : [(X (AND p0 p1)), (X (NOT (AND p0 p1))), (X (AND (NOT p0) p1)), (X (NOT (AND (NOT p0) p1))), (X p0), (X (NOT p0)), (X p1), (X (NOT p1)), (X (X (AND p0 p1))), (X (X (NOT (AND p0 p1)))), (X (X (AND (NOT p0) p1))), (X (X (NOT (AND (NOT p0) p1)))), (X (X p0)), (X (X (NOT p0))), (X (X p1)), (X (X (NOT p1)))]
Property proved to be true thanks to knowledge (Minato strategy)
Knowledge based reduction with 3 factoid took 11 ms. Reduced automaton from 4 states, 8 edges and 2 AP (stutter sensitive) to 1 states, 0 edges and 0 AP (stutter insensitive).
FORMULA NQueens-PT-15-LTLFireability-12 TRUE TECHNIQUES KNOWLEDGE
Treatment of property NQueens-PT-15-LTLFireability-12 finished in 16153 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(G((X(p1)||p0))))'
Support contains 8 out of 84 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 2 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:41:04] [INFO ] Invariants computation overflowed in 10 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:41:04] [INFO ] Implicit Places using invariants in 92 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:41:04] [INFO ] Invariants computation overflowed in 8 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:41:16] [INFO ] Implicit Places using invariants and state equation in 12088 ms returned []
Implicit Place search using SMT with State Equation took 12193 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in LTL mode , in 1 iterations and 12197 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 123 ms :[true, (NOT p1), (AND (NOT p1) (NOT p0)), (AND (NOT p0) (NOT p1))]
Running random walk in product with property : NQueens-PT-15-LTLFireability-13
Entered a terminal (fully accepting) state of product in 6 steps with 0 reset in 0 ms.
FORMULA NQueens-PT-15-LTLFireability-13 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-13 finished in 12332 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((F(p0) U (p1||X(p2)))))'
Support contains 12 out of 84 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 3 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:41:16] [INFO ] Invariants computation overflowed in 8 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:41:16] [INFO ] Implicit Places using invariants in 78 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:41:17] [INFO ] Invariants computation overflowed in 14 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:41:28] [INFO ] Implicit Places using invariants and state equation in 11282 ms returned []
Implicit Place search using SMT with State Equation took 11364 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in LTL mode , in 1 iterations and 11367 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 137 ms :[(AND (NOT p1) (NOT p2)), (AND (NOT p0) (NOT p2)), (AND (NOT p1) (NOT p2)), (NOT p0)]
Running random walk in product with property : NQueens-PT-15-LTLFireability-14
Stuttering criterion allowed to conclude after 19 steps with 1 reset in 1 ms.
FORMULA NQueens-PT-15-LTLFireability-14 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-14 finished in 11519 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202505121319/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(G((X(X(p1))||p0))))'
Support contains 8 out of 84 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 84/84 places, 225/225 transitions.
Applied a total of 0 rules in 2 ms. Remains 84 /84 variables (removed 0) and now considering 225/225 (removed 0) transitions.
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:41:28] [INFO ] Invariants computation overflowed in 12 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:41:28] [INFO ] Implicit Places using invariants in 88 ms returned []
// Phase 1: matrix 225 rows 84 cols
[2025-06-02 11:41:28] [INFO ] Invariants computation overflowed in 9 ms
Starting Z3 with timeout 160.0 s and query timeout 16000.0 ms
[2025-06-02 11:41:45] [INFO ] Implicit Places using invariants and state equation in 17462 ms returned []
Implicit Place search using SMT with State Equation took 17552 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 0ms
Finished structural reductions in LTL mode , in 1 iterations and 17555 ms. Remains : 84/84 places, 225/225 transitions.
Stuttering acceptance computed with spot in 151 ms :[(AND (NOT p0) (NOT p1)), (AND (NOT p0) (NOT p1)), (NOT p1), (NOT p1), true]
Running random walk in product with property : NQueens-PT-15-LTLFireability-15
Entered a terminal (fully accepting) state of product in 3 steps with 0 reset in 0 ms.
FORMULA NQueens-PT-15-LTLFireability-15 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-15-LTLFireability-15 finished in 17719 ms.
All properties solved by simple procedures.
Total runtime 190901 ms.

BK_STOP 1748864506498

--------------------
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_1.0.0.202505121319.jar
+ VERSION=202505121319
+ echo 'Running Version 202505121319'
+ /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-15"
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 2-5832"
echo " Executing tool itstools"
echo " Input is NQueens-PT-15, 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 r142-tall-174876812300316"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/NQueens-PT-15.tgz
mv NQueens-PT-15 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 ;