About the Execution of LTSMin+red for NQueens-PT-25
| Execution Summary | |||||
| Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
| 395.384 | 44111.00 | 62092.00 | 848.40 | FFFFFFFTFFFTFFFF | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2023-input.r265-smll-167863539500059.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2023-input.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 2-5348
Executing tool ltsminxred
Input is NQueens-PT-25, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r265-smll-167863539500059
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 1.1M
-rw-r--r-- 1 mcc users 9.1K Feb 26 17:12 CTLCardinality.txt
-rw-r--r-- 1 mcc users 102K Feb 26 17:12 CTLCardinality.xml
-rw-r--r-- 1 mcc users 7.2K Feb 26 17:11 CTLFireability.txt
-rw-r--r-- 1 mcc users 61K Feb 26 17:11 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.5K Feb 25 16:26 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Feb 25 16:26 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.5K Feb 25 16:27 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Feb 25 16:27 LTLFireability.xml
-rw-r--r-- 1 mcc users 16K Feb 26 17:14 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 167K Feb 26 17:14 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 11K Feb 26 17:13 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 74K Feb 26 17:13 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 16:27 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Feb 25 16:27 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 3 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 534K Mar 5 18:22 model.pnml
--------------------
content from stdout:
=== Data for post analysis generated by BenchKit (invocation template)
The expected result is a vector of booleans
BOOL_VECTOR
here is the order used to build the result vector(from text file)
FORMULA_NAME NQueens-PT-25-LTLCardinality-00
FORMULA_NAME NQueens-PT-25-LTLCardinality-01
FORMULA_NAME NQueens-PT-25-LTLCardinality-02
FORMULA_NAME NQueens-PT-25-LTLCardinality-03
FORMULA_NAME NQueens-PT-25-LTLCardinality-04
FORMULA_NAME NQueens-PT-25-LTLCardinality-05
FORMULA_NAME NQueens-PT-25-LTLCardinality-06
FORMULA_NAME NQueens-PT-25-LTLCardinality-07
FORMULA_NAME NQueens-PT-25-LTLCardinality-08
FORMULA_NAME NQueens-PT-25-LTLCardinality-09
FORMULA_NAME NQueens-PT-25-LTLCardinality-10
FORMULA_NAME NQueens-PT-25-LTLCardinality-11
FORMULA_NAME NQueens-PT-25-LTLCardinality-12
FORMULA_NAME NQueens-PT-25-LTLCardinality-13
FORMULA_NAME NQueens-PT-25-LTLCardinality-14
FORMULA_NAME NQueens-PT-25-LTLCardinality-15
=== Now, execution of the tool begins
BK_START 1678749337402
bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
Invoking MCC driver with
BK_TOOL=ltsminxred
BK_EXAMINATION=LTLCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=NQueens-PT-25
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-13 23:15:40] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLCardinality, -timeout, 360, -rebuildPNML]
[2023-03-13 23:15:40] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-13 23:15:40] [INFO ] Load time of PNML (sax parser for PT used): 189 ms
[2023-03-13 23:15:40] [INFO ] Transformed 775 places.
[2023-03-13 23:15:40] [INFO ] Transformed 625 transitions.
[2023-03-13 23:15:40] [INFO ] Parsed PT model containing 775 places and 625 transitions and 3125 arcs in 317 ms.
Parsed 16 properties from file /home/mcc/execution/LTLCardinality.xml in 13 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-25-LTLCardinality-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-25-LTLCardinality-07 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-25-LTLCardinality-15 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 41 out of 773 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 773/773 places, 625/625 transitions.
Reduce places removed 590 places and 0 transitions.
Iterating post reduction 0 with 590 rules applied. Total rules applied 590 place count 183 transition count 625
Applied a total of 590 rules in 48 ms. Remains 183 /773 variables (removed 590) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 183 cols
[2023-03-13 23:15:41] [INFO ] Invariants computation overflowed in 157 ms
[2023-03-13 23:15:41] [INFO ] Implicit Places using invariants in 710 ms returned []
// Phase 1: matrix 625 rows 183 cols
[2023-03-13 23:15:42] [INFO ] Invariants computation overflowed in 117 ms
[2023-03-13 23:15:43] [INFO ] Implicit Places using invariants and state equation in 1961 ms returned [85, 133, 134, 182]
Discarding 4 places :
Implicit Place search using SMT with State Equation took 2732 ms to find 4 implicit places.
Starting structural reductions in LTL mode, iteration 1 : 179/773 places, 625/625 transitions.
Applied a total of 0 rules in 17 ms. Remains 179 /179 variables (removed 0) and now considering 625/625 (removed 0) transitions.
Finished structural reductions in LTL mode , in 2 iterations and 2798 ms. Remains : 179/773 places, 625/625 transitions.
Support contains 41 out of 179 places after structural reductions.
[2023-03-13 23:15:44] [INFO ] Flatten gal took : 146 ms
[2023-03-13 23:15:44] [INFO ] Flatten gal took : 105 ms
[2023-03-13 23:15:44] [INFO ] Input system was already deterministic with 625 transitions.
Support contains 40 out of 179 places (down from 41) after GAL structural reductions.
Incomplete random walk after 10000 steps, including 430 resets, run finished after 764 ms. (steps per millisecond=13 ) properties (out of 22) seen :20
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 50 ms. (steps per millisecond=200 ) properties (out of 2) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 41 ms. (steps per millisecond=243 ) properties (out of 2) seen :0
Running SMT prover for 2 properties.
// Phase 1: matrix 625 rows 179 cols
[2023-03-13 23:15:45] [INFO ] Invariants computation overflowed in 78 ms
[2023-03-13 23:15:46] [INFO ] After 324ms SMT Verify possible using all constraints in real domain returned unsat :2 sat :0
Fused 2 Parikh solutions to 0 different solutions.
Parikh walk visited 0 properties in 0 ms.
Successfully simplified 2 atomic propositions for a total of 13 simplifications.
FORMULA NQueens-PT-25-LTLCardinality-02 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-25-LTLCardinality-11 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Computed a total of 179 stabilizing places and 625 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 179 transition count 625
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_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(X((p0&&X((X(p1)&&(F(p2)||G(p0))))))))'
Support contains 5 out of 179 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Reduce places removed 31 places and 0 transitions.
Iterating post reduction 0 with 31 rules applied. Total rules applied 31 place count 148 transition count 625
Applied a total of 31 rules in 8 ms. Remains 148 /179 variables (removed 31) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 148 cols
[2023-03-13 23:15:46] [INFO ] Invariants computation overflowed in 50 ms
[2023-03-13 23:15:47] [INFO ] Implicit Places using invariants in 883 ms returned []
// Phase 1: matrix 625 rows 148 cols
[2023-03-13 23:15:47] [INFO ] Invariants computation overflowed in 47 ms
[2023-03-13 23:15:48] [INFO ] Implicit Places using invariants and state equation in 1433 ms returned []
Implicit Place search using SMT with State Equation took 2325 ms to find 0 implicit places.
// Phase 1: matrix 625 rows 148 cols
[2023-03-13 23:15:48] [INFO ] Invariants computation overflowed in 45 ms
[2023-03-13 23:15:49] [INFO ] Dead Transitions using invariants and state equation in 484 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 148/179 places, 625/625 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 2821 ms. Remains : 148/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 587 ms :[(OR (NOT p0) (NOT p1)), (OR (NOT p0) (NOT p1)), (OR (NOT p0) (NOT p1)), true, (OR (NOT p1) (AND (NOT p0) (NOT p2))), (NOT p1), (NOT p2), (AND (NOT p2) (NOT p0))]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-00 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=(NOT p0), acceptance={} source=2 dest: 3}, { cond=p0, acceptance={} source=2 dest: 4}], [{ cond=true, acceptance={0} source=3 dest: 3}], [{ cond=true, acceptance={} source=4 dest: 5}, { cond=(AND (NOT p0) (NOT p2)), acceptance={} source=4 dest: 6}, { cond=(AND p0 (NOT p2)), acceptance={} source=4 dest: 7}], [{ cond=(NOT p1), acceptance={} source=5 dest: 3}], [{ cond=(NOT p2), acceptance={0} source=6 dest: 6}], [{ cond=(AND (NOT p0) (NOT p2)), acceptance={} source=7 dest: 6}, { cond=(AND p0 (NOT p2)), acceptance={} source=7 dest: 7}]], initial=0, aps=[p0:(GT s0 s3), p2:(GT s1 s74), p1:(GT 1 s2)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null, null, null, null, null][false, false, false, false, false, false, false, false]]
Entered a terminal (fully accepting) state of product in 2 steps with 0 reset in 2 ms.
FORMULA NQueens-PT-25-LTLCardinality-00 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-00 finished in 3493 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(X(G(p0)))'
Support contains 2 out of 179 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Reduce places removed 34 places and 0 transitions.
Iterating post reduction 0 with 34 rules applied. Total rules applied 34 place count 145 transition count 625
Applied a total of 34 rules in 6 ms. Remains 145 /179 variables (removed 34) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 145 cols
[2023-03-13 23:15:49] [INFO ] Invariants computation overflowed in 57 ms
[2023-03-13 23:15:50] [INFO ] Implicit Places using invariants in 396 ms returned []
// Phase 1: matrix 625 rows 145 cols
[2023-03-13 23:15:50] [INFO ] Invariants computation overflowed in 63 ms
[2023-03-13 23:15:51] [INFO ] Implicit Places using invariants and state equation in 1645 ms returned []
Implicit Place search using SMT with State Equation took 2068 ms to find 0 implicit places.
// Phase 1: matrix 625 rows 145 cols
[2023-03-13 23:15:52] [INFO ] Invariants computation overflowed in 71 ms
[2023-03-13 23:15:52] [INFO ] Dead Transitions using invariants and state equation in 471 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 145/179 places, 625/625 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 2569 ms. Remains : 145/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 105 ms :[true, (NOT p0), (NOT p0)]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-01 automaton TGBA Formula[mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=(NOT p0), acceptance={} source=2 dest: 0}, { cond=p0, acceptance={} source=2 dest: 2}]], initial=1, aps=[p0:(GT s0 s8)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, terminal, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Entered a terminal (fully accepting) state of product in 1 steps with 0 reset in 1 ms.
FORMULA NQueens-PT-25-LTLCardinality-01 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-01 finished in 2703 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((F(p0)&&F(p1))))'
Support contains 4 out of 179 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Graph (complete) has 140 edges and 179 vertex of which 144 are kept as prefixes of interest. Removing 35 places using SCC suffix rule.3 ms
Discarding 35 places :
Also discarding 0 output transitions
Applied a total of 1 rules in 30 ms. Remains 144 /179 variables (removed 35) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 144 cols
[2023-03-13 23:15:52] [INFO ] Invariants computation overflowed in 56 ms
[2023-03-13 23:15:52] [INFO ] Implicit Places using invariants in 346 ms returned []
// Phase 1: matrix 625 rows 144 cols
[2023-03-13 23:15:53] [INFO ] Invariants computation overflowed in 53 ms
[2023-03-13 23:15:54] [INFO ] Implicit Places using invariants and state equation in 1476 ms returned []
Implicit Place search using SMT with State Equation took 1838 ms to find 0 implicit places.
[2023-03-13 23:15:54] [INFO ] Redundant transitions in 45 ms returned []
// Phase 1: matrix 625 rows 144 cols
[2023-03-13 23:15:54] [INFO ] Invariants computation overflowed in 60 ms
[2023-03-13 23:15:54] [INFO ] Dead Transitions using invariants and state equation in 460 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 144/179 places, 625/625 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 2384 ms. Remains : 144/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 148 ms :[(OR (NOT p0) (NOT p1)), (NOT p0), (NOT p1)]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-03 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}], [{ cond=(NOT p1), acceptance={0} source=2 dest: 2}]], initial=0, aps=[p0:(LEQ s0 s2), p1:(GT s1 s3)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant, very-weak, weak, inherently-weak], stateDesc=[null, null, null][true, true, true]]
Stuttering criterion allowed to conclude after 24 steps with 0 reset in 2 ms.
FORMULA NQueens-PT-25-LTLCardinality-03 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-03 finished in 2560 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G(F(p0)))'
Support contains 2 out of 179 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Graph (complete) has 140 edges and 179 vertex of which 143 are kept as prefixes of interest. Removing 36 places using SCC suffix rule.2 ms
Discarding 36 places :
Also discarding 0 output transitions
Applied a total of 1 rules in 11 ms. Remains 143 /179 variables (removed 36) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 143 cols
[2023-03-13 23:15:55] [INFO ] Invariants computation overflowed in 54 ms
[2023-03-13 23:15:55] [INFO ] Implicit Places using invariants in 443 ms returned []
// Phase 1: matrix 625 rows 143 cols
[2023-03-13 23:15:55] [INFO ] Invariants computation overflowed in 53 ms
[2023-03-13 23:15:57] [INFO ] Implicit Places using invariants and state equation in 1546 ms returned []
Implicit Place search using SMT with State Equation took 2013 ms to find 0 implicit places.
[2023-03-13 23:15:57] [INFO ] Redundant transitions in 9 ms returned []
// Phase 1: matrix 625 rows 143 cols
[2023-03-13 23:15:57] [INFO ] Invariants computation overflowed in 72 ms
[2023-03-13 23:15:57] [INFO ] Dead Transitions using invariants and state equation in 511 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 143/179 places, 625/625 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 2556 ms. Remains : 143/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 86 ms :[(NOT p0), (NOT p0)]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-05 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}]], initial=0, aps=[p0:(LEQ s0 s1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant, very-weak, weak, inherently-weak], stateDesc=[null, null][true, true]]
Stuttering criterion allowed to conclude after 625 steps with 26 reset in 46 ms.
FORMULA NQueens-PT-25-LTLCardinality-05 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-05 finished in 2716 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((X((X(p0) U p1))||G(X(!p1))))'
Support contains 5 out of 179 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Reduce places removed 31 places and 0 transitions.
Iterating post reduction 0 with 31 rules applied. Total rules applied 31 place count 148 transition count 625
Applied a total of 31 rules in 5 ms. Remains 148 /179 variables (removed 31) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 148 cols
[2023-03-13 23:15:57] [INFO ] Invariants computation overflowed in 49 ms
[2023-03-13 23:15:58] [INFO ] Implicit Places using invariants in 341 ms returned []
// Phase 1: matrix 625 rows 148 cols
[2023-03-13 23:15:58] [INFO ] Invariants computation overflowed in 49 ms
[2023-03-13 23:15:59] [INFO ] Implicit Places using invariants and state equation in 1522 ms returned []
Implicit Place search using SMT with State Equation took 1903 ms to find 0 implicit places.
// Phase 1: matrix 625 rows 148 cols
[2023-03-13 23:15:59] [INFO ] Invariants computation overflowed in 54 ms
[2023-03-13 23:16:00] [INFO ] Dead Transitions using invariants and state equation in 385 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 148/179 places, 625/625 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 2302 ms. Remains : 148/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 207 ms :[true, false, false, (AND p1 (NOT p0)), p1]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-06 automaton TGBA Formula[mat=[[{ cond=true, acceptance={0} source=0 dest: 0}], [{ cond=true, acceptance={} source=1 dest: 2}], [{ cond=(NOT p1), acceptance={} source=2 dest: 3}], [{ cond=(AND p1 (NOT p0)), acceptance={} source=3 dest: 0}, { cond=(AND (NOT p1) p0), acceptance={} source=3 dest: 3}, { cond=(AND (NOT p1) (NOT p0)), acceptance={} source=3 dest: 4}], [{ cond=p1, acceptance={} source=4 dest: 0}, { cond=(NOT p1), acceptance={} source=4 dest: 4}]], initial=1, aps=[p1:(GT s3 s1), p0:(AND (GT 3 s2) (LEQ s0 s32))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null, null, null][false, false, false, false, false]]
Product exploration explored 100000 steps with 4395 reset in 4503 ms.
Entered a terminal (fully accepting) state of product in 12032 steps with 533 reset in 589 ms.
FORMULA NQueens-PT-25-LTLCardinality-06 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-06 finished in 7637 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F(G(p0)))'
Support contains 3 out of 179 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Graph (complete) has 140 edges and 179 vertex of which 147 are kept as prefixes of interest. Removing 32 places using SCC suffix rule.1 ms
Discarding 32 places :
Also discarding 0 output transitions
Applied a total of 1 rules in 9 ms. Remains 147 /179 variables (removed 32) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 147 cols
[2023-03-13 23:16:05] [INFO ] Invariants computation overflowed in 46 ms
[2023-03-13 23:16:06] [INFO ] Implicit Places using invariants in 496 ms returned []
// Phase 1: matrix 625 rows 147 cols
[2023-03-13 23:16:06] [INFO ] Invariants computation overflowed in 75 ms
[2023-03-13 23:16:07] [INFO ] Implicit Places using invariants and state equation in 1588 ms returned []
Implicit Place search using SMT with State Equation took 2096 ms to find 0 implicit places.
[2023-03-13 23:16:07] [INFO ] Redundant transitions in 6 ms returned []
// Phase 1: matrix 625 rows 147 cols
[2023-03-13 23:16:07] [INFO ] Invariants computation overflowed in 67 ms
[2023-03-13 23:16:08] [INFO ] Dead Transitions using invariants and state equation in 493 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 147/179 places, 625/625 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 2631 ms. Remains : 147/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 172 ms :[(NOT p0)]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-08 automaton TGBA Formula[mat=[[{ cond=p0, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={0} source=0 dest: 0}]], initial=0, aps=[p0:(AND (LEQ s1 s0) (GT 2 s2))], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant], stateDesc=[null][true]]
Stuttering criterion allowed to conclude after 69 steps with 2 reset in 4 ms.
FORMULA NQueens-PT-25-LTLCardinality-08 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-08 finished in 2838 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F(G(((F(p1)||p0)&&(F(p1)||G(p2))))))'
Support contains 7 out of 179 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Graph (complete) has 140 edges and 179 vertex of which 151 are kept as prefixes of interest. Removing 28 places using SCC suffix rule.2 ms
Discarding 28 places :
Also discarding 0 output transitions
Applied a total of 1 rules in 12 ms. Remains 151 /179 variables (removed 28) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 151 cols
[2023-03-13 23:16:08] [INFO ] Invariants computation overflowed in 51 ms
[2023-03-13 23:16:08] [INFO ] Implicit Places using invariants in 348 ms returned []
// Phase 1: matrix 625 rows 151 cols
[2023-03-13 23:16:08] [INFO ] Invariants computation overflowed in 51 ms
[2023-03-13 23:16:10] [INFO ] Implicit Places using invariants and state equation in 1469 ms returned []
Implicit Place search using SMT with State Equation took 1846 ms to find 0 implicit places.
[2023-03-13 23:16:10] [INFO ] Redundant transitions in 6 ms returned []
// Phase 1: matrix 625 rows 151 cols
[2023-03-13 23:16:10] [INFO ] Invariants computation overflowed in 50 ms
[2023-03-13 23:16:10] [INFO ] Dead Transitions using invariants and state equation in 440 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 151/179 places, 625/625 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 2314 ms. Remains : 151/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 156 ms :[(OR (AND (NOT p0) (NOT p1)) (AND (NOT p1) (NOT p2))), (OR (AND (NOT p0) (NOT p1)) (AND (NOT p1) (NOT p2))), (AND (NOT p1) (NOT p2))]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-09 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(OR (AND (NOT p0) (NOT p1)) (AND (NOT p1) (NOT p2))), acceptance={} source=0 dest: 1}, { cond=(AND p0 (NOT p1) p2), acceptance={} source=0 dest: 2}], [{ cond=(AND p0 (NOT p1) p2), acceptance={0} source=1 dest: 1}, { cond=(OR (AND (NOT p0) (NOT p1)) (AND (NOT p1) (NOT p2))), acceptance={0, 1} source=1 dest: 1}, { cond=(AND p0 (NOT p1) p2), acceptance={1} source=1 dest: 2}], [{ cond=(AND (NOT p1) (NOT p2)), acceptance={0, 1} source=2 dest: 1}, { cond=(AND (NOT p1) p2), acceptance={1} source=2 dest: 2}]], initial=0, aps=[p0:(OR (GT s5 s2) (GT 1 s1)), p1:(GT s6 s4), p2:(GT s3 s0)], nbAcceptance=2, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant], stateDesc=[null, null, null][true, true, true]]
Stuttering criterion allowed to conclude after 23 steps with 0 reset in 6 ms.
FORMULA NQueens-PT-25-LTLCardinality-09 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-09 finished in 2516 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!((X(F(p0))&&F(p1)))'
Support contains 3 out of 179 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Reduce places removed 33 places and 0 transitions.
Iterating post reduction 0 with 33 rules applied. Total rules applied 33 place count 146 transition count 625
Applied a total of 33 rules in 6 ms. Remains 146 /179 variables (removed 33) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 146 cols
[2023-03-13 23:16:10] [INFO ] Invariants computation overflowed in 45 ms
[2023-03-13 23:16:11] [INFO ] Implicit Places using invariants in 333 ms returned []
// Phase 1: matrix 625 rows 146 cols
[2023-03-13 23:16:11] [INFO ] Invariants computation overflowed in 45 ms
[2023-03-13 23:16:12] [INFO ] Implicit Places using invariants and state equation in 1409 ms returned []
Implicit Place search using SMT with State Equation took 1760 ms to find 0 implicit places.
// Phase 1: matrix 625 rows 146 cols
[2023-03-13 23:16:12] [INFO ] Invariants computation overflowed in 43 ms
[2023-03-13 23:16:13] [INFO ] Dead Transitions using invariants and state equation in 415 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 146/179 places, 625/625 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 2196 ms. Remains : 146/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 255 ms :[(OR (NOT p1) (NOT p0)), (NOT p0), (NOT p1)]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-10 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}], [{ cond=(NOT p0), acceptance={} source=1 dest: 1}], [{ cond=(NOT p1), acceptance={} source=2 dest: 2}]], initial=0, aps=[p1:(LEQ s142 s0), p0:(LEQ 1 s1)], nbAcceptance=0, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-sensitive, very-weak, weak, inherently-weak], stateDesc=[null, null, null][false, false, false]]
Stuttering criterion allowed to conclude after 24 steps with 0 reset in 1 ms.
FORMULA NQueens-PT-25-LTLCardinality-10 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-10 finished in 2484 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(G((F(p0)&&F(p1)&&F(G(p2)))))'
Support contains 4 out of 179 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Graph (complete) has 140 edges and 179 vertex of which 147 are kept as prefixes of interest. Removing 32 places using SCC suffix rule.2 ms
Discarding 32 places :
Also discarding 0 output transitions
Applied a total of 1 rules in 10 ms. Remains 147 /179 variables (removed 32) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 147 cols
[2023-03-13 23:16:13] [INFO ] Invariants computation overflowed in 53 ms
[2023-03-13 23:16:13] [INFO ] Implicit Places using invariants in 345 ms returned []
// Phase 1: matrix 625 rows 147 cols
[2023-03-13 23:16:13] [INFO ] Invariants computation overflowed in 53 ms
[2023-03-13 23:16:15] [INFO ] Implicit Places using invariants and state equation in 1373 ms returned []
Implicit Place search using SMT with State Equation took 1748 ms to find 0 implicit places.
[2023-03-13 23:16:15] [INFO ] Redundant transitions in 5 ms returned []
// Phase 1: matrix 625 rows 147 cols
[2023-03-13 23:16:15] [INFO ] Invariants computation overflowed in 52 ms
[2023-03-13 23:16:15] [INFO ] Dead Transitions using invariants and state equation in 413 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 147/179 places, 625/625 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 2196 ms. Remains : 147/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 181 ms :[(OR (NOT p0) (NOT p1) (NOT p2)), (NOT p0), (NOT p1), (NOT p2)]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-12 automaton TGBA Formula[mat=[[{ cond=true, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={} source=0 dest: 1}, { cond=(NOT p1), acceptance={} source=0 dest: 2}, { cond=(NOT p2), acceptance={} source=0 dest: 3}], [{ cond=(NOT p0), acceptance={0} source=1 dest: 1}], [{ cond=(NOT p1), acceptance={0} source=2 dest: 2}], [{ cond=p2, acceptance={} source=3 dest: 3}, { cond=(NOT p2), acceptance={0} source=3 dest: 3}]], initial=0, aps=[p0:(LEQ s2 s0), p1:(LEQ 1 s69), p2:(LEQ 1 s1)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, no-univ-branch, stutter-invariant], stateDesc=[null, null, null, null][true, true, true, true]]
Stuttering criterion allowed to conclude after 22 steps with 0 reset in 2 ms.
FORMULA NQueens-PT-25-LTLCardinality-12 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-12 finished in 2409 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F(G(p0)))'
Support contains 1 out of 179 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Graph (complete) has 140 edges and 179 vertex of which 145 are kept as prefixes of interest. Removing 34 places using SCC suffix rule.1 ms
Discarding 34 places :
Also discarding 0 output transitions
Applied a total of 1 rules in 10 ms. Remains 145 /179 variables (removed 34) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 145 cols
[2023-03-13 23:16:15] [INFO ] Invariants computation overflowed in 49 ms
[2023-03-13 23:16:16] [INFO ] Implicit Places using invariants in 335 ms returned []
// Phase 1: matrix 625 rows 145 cols
[2023-03-13 23:16:16] [INFO ] Invariants computation overflowed in 50 ms
[2023-03-13 23:16:17] [INFO ] Implicit Places using invariants and state equation in 1421 ms returned []
Implicit Place search using SMT with State Equation took 1794 ms to find 0 implicit places.
[2023-03-13 23:16:17] [INFO ] Redundant transitions in 6 ms returned []
// Phase 1: matrix 625 rows 145 cols
[2023-03-13 23:16:17] [INFO ] Invariants computation overflowed in 48 ms
[2023-03-13 23:16:17] [INFO ] Dead Transitions using invariants and state equation in 366 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 145/179 places, 625/625 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 2197 ms. Remains : 145/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 45 ms :[(NOT p0)]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-13 automaton TGBA Formula[mat=[[{ cond=p0, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={0} source=0 dest: 0}]], initial=0, aps=[p0:(LEQ 1 s0)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant], stateDesc=[null][true]]
Stuttering criterion allowed to conclude after 22 steps with 0 reset in 1 ms.
FORMULA NQueens-PT-25-LTLCardinality-13 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-13 finished in 2265 ms.
Running Spot : '/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.ltl.spot.binaries_1.0.0.202303021504/bin/ltl2tgba-linux64' '--check=stutter' '--hoaf=tv' '-f' '!(F(G(p0)))'
Support contains 2 out of 179 places. Attempting structural reductions.
Starting structural reductions in SI_LTL mode, iteration 0 : 179/179 places, 625/625 transitions.
Graph (complete) has 140 edges and 179 vertex of which 145 are kept as prefixes of interest. Removing 34 places using SCC suffix rule.1 ms
Discarding 34 places :
Also discarding 0 output transitions
Applied a total of 1 rules in 10 ms. Remains 145 /179 variables (removed 34) and now considering 625/625 (removed 0) transitions.
// Phase 1: matrix 625 rows 145 cols
[2023-03-13 23:16:18] [INFO ] Invariants computation overflowed in 51 ms
[2023-03-13 23:16:18] [INFO ] Implicit Places using invariants in 321 ms returned []
// Phase 1: matrix 625 rows 145 cols
[2023-03-13 23:16:18] [INFO ] Invariants computation overflowed in 59 ms
[2023-03-13 23:16:19] [INFO ] Implicit Places using invariants and state equation in 1367 ms returned []
Implicit Place search using SMT with State Equation took 1704 ms to find 0 implicit places.
[2023-03-13 23:16:19] [INFO ] Redundant transitions in 5 ms returned []
// Phase 1: matrix 625 rows 145 cols
[2023-03-13 23:16:19] [INFO ] Invariants computation overflowed in 51 ms
[2023-03-13 23:16:20] [INFO ] Dead Transitions using invariants and state equation in 403 ms found 0 transitions.
Starting structural reductions in SI_LTL mode, iteration 1 : 145/179 places, 625/625 transitions.
Finished structural reductions in SI_LTL mode , in 1 iterations and 2156 ms. Remains : 145/179 places, 625/625 transitions.
Stuttering acceptance computed with spot in 38 ms :[(NOT p0)]
Running random walk in product with property : NQueens-PT-25-LTLCardinality-14 automaton TGBA Formula[mat=[[{ cond=p0, acceptance={} source=0 dest: 0}, { cond=(NOT p0), acceptance={0} source=0 dest: 0}]], initial=0, aps=[p0:(LEQ s0 s73)], nbAcceptance=1, properties=[trans-labels, explicit-labels, trans-acc, complete, deterministic, no-univ-branch, unambiguous, semi-deterministic, stutter-invariant], stateDesc=[null][true]]
Stuttering criterion allowed to conclude after 2005 steps with 85 reset in 93 ms.
FORMULA NQueens-PT-25-LTLCardinality-14 FALSE TECHNIQUES STUTTER_TEST
Treatment of property NQueens-PT-25-LTLCardinality-14 finished in 2302 ms.
All properties solved by simple procedures.
Total runtime 39913 ms.
ITS solved all properties within timeout
BK_STOP 1678749381513
--------------------
content from stderr:
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination LTLCardinality -timeout 360 -rebuildPNML
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-25"
export BK_EXAMINATION="LTLCardinality"
export BK_TOOL="ltsminxred"
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 2-5348"
echo " Executing tool ltsminxred"
echo " Input is NQueens-PT-25, examination is LTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r265-smll-167863539500059"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/NQueens-PT-25.tgz
mv NQueens-PT-25 execution
cd execution
if [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "UpperBounds" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] || [ "LTLCardinality" = "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 [ "LTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLCardinality" != "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 "LTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLCardinality.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 '
echo "FORMULA_NAME $x"
done
elif [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLCardinality"
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 ;