About the Execution of Marcie+red for Sudoku-COL-BN16
| Execution Summary | |||||
| Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
| 7599.567 | 3600000.00 | 3698508.00 | 9897.30 | ????TTT??????T?? | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2023-input.r490-tall-167912708300153.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 marciexred
Input is Sudoku-COL-BN16, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r490-tall-167912708300153
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 900K
-rw-r--r-- 1 mcc users 7.4K Feb 26 09:33 CTLCardinality.txt
-rw-r--r-- 1 mcc users 77K Feb 26 09:33 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.6K Feb 26 08:48 CTLFireability.txt
-rw-r--r-- 1 mcc users 62K Feb 26 08:48 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.6K Jan 29 11:41 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.6K Feb 25 17:17 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Feb 25 17:17 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K Feb 25 17:17 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Feb 25 17:17 LTLFireability.xml
-rw-r--r-- 1 mcc users 12K Feb 26 11:03 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 121K Feb 26 11:03 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.3K Feb 26 09:45 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 57K Feb 26 09:45 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 17:17 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 17:17 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 equiv_pt
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 446K Mar 5 18:23 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 Sudoku-COL-BN16-CTLCardinality-00
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-01
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-02
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-03
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-04
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-05
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-06
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-07
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-08
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-09
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-10
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-11
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-12
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-13
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-14
FORMULA_NAME Sudoku-COL-BN16-CTLCardinality-15
=== Now, execution of the tool begins
BK_START 1679195958940
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=marciexred
BK_EXAMINATION=CTLCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=Sudoku-COL-BN16
Applying reductions before tool marcie
Invoking reducer
Running Version 202303021504
[2023-03-19 03:19:20] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLCardinality, -timeout, 360, -rebuildPNML]
[2023-03-19 03:19:20] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-19 03:19:20] [INFO ] Detected file is not PT type :http://www.pnml.org/version-2009/grammar/symmetricnet
log4j:WARN No appenders could be found for logger (org.apache.axiom.locator.DefaultOMMetaFactoryLocator).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[2023-03-19 03:19:20] [WARNING] Using fallBack plugin, rng conformance not checked
[2023-03-19 03:19:21] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 764 ms
[2023-03-19 03:19:21] [INFO ] Imported 5 HL places and 1 HL transitions for a total of 5120 PT places and 65536.0 transition bindings in 26 ms.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 12 ms.
[2023-03-19 03:19:21] [INFO ] Built PT skeleton of HLPN with 5 places and 1 transitions 5 arcs in 7 ms.
[2023-03-19 03:19:21] [INFO ] Skeletonized 16 HLPN properties in 2 ms.
Computed a total of 5 stabilizing places and 1 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 5 transition count 1
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
Remains 16 properties that can be checked using skeleton over-approximation.
Computed a total of 5 stabilizing places and 1 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 5 transition count 1
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
Incomplete random walk after 10061 steps, including 38 resets, run finished after 47 ms. (steps per millisecond=214 ) properties (out of 73) seen :56
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 3 ms. (steps per millisecond=343 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 15 ms. (steps per millisecond=68 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 3 ms. (steps per millisecond=343 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 3 ms. (steps per millisecond=343 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 3 ms. (steps per millisecond=343 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 3 ms. (steps per millisecond=343 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Incomplete Best-First random walk after 1031 steps, including 3 resets, run finished after 2 ms. (steps per millisecond=515 ) properties (out of 17) seen :0
Running SMT prover for 17 properties.
// Phase 1: matrix 1 rows 5 cols
[2023-03-19 03:19:21] [INFO ] Computed 4 place invariants in 3 ms
[2023-03-19 03:19:21] [INFO ] [Real]Absence check using 4 positive place invariants in 4 ms returned sat
[2023-03-19 03:19:21] [INFO ] After 7ms SMT Verify possible using state equation in real domain returned unsat :5 sat :2 real:10
[2023-03-19 03:19:21] [INFO ] After 11ms SMT Verify possible using trap constraints in real domain returned unsat :5 sat :2 real:10
Attempting to minimize the solution found.
Minimization took 6 ms.
[2023-03-19 03:19:21] [INFO ] After 188ms SMT Verify possible using all constraints in real domain returned unsat :5 sat :2 real:10
[2023-03-19 03:19:21] [INFO ] [Nat]Absence check using 4 positive place invariants in 1 ms returned sat
[2023-03-19 03:19:21] [INFO ] After 7ms SMT Verify possible using state equation in natural domain returned unsat :13 sat :4
[2023-03-19 03:19:21] [INFO ] After 13ms SMT Verify possible using trap constraints in natural domain returned unsat :13 sat :4
Attempting to minimize the solution found.
Minimization took 5 ms.
[2023-03-19 03:19:21] [INFO ] After 76ms SMT Verify possible using all constraints in natural domain returned unsat :13 sat :4
Fused 17 Parikh solutions to 4 different solutions.
Finished Parikh walk after 235 steps, including 0 resets, run visited all 4 properties in 9 ms. (steps per millisecond=26 )
Parikh walk visited 4 properties in 10 ms.
Successfully simplified 13 atomic propositions for a total of 16 simplifications.
FORMULA Sudoku-COL-BN16-CTLCardinality-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Sudoku-COL-BN16-CTLCardinality-06 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Sudoku-COL-BN16-CTLCardinality-13 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2023-03-19 03:19:21] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
[2023-03-19 03:19:21] [INFO ] Flatten gal took : 14 ms
FORMULA Sudoku-COL-BN16-CTLCardinality-05 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2023-03-19 03:19:21] [INFO ] Flatten gal took : 2 ms
Domain [N(16), N(16)] of place Rows breaks symmetries in sort N
[2023-03-19 03:19:21] [INFO ] Unfolded HLPN to a Petri net with 5120 places and 4096 transitions 20480 arcs in 139 ms.
[2023-03-19 03:19:21] [INFO ] Unfolded 12 HLPN properties in 5 ms.
Support contains 5120 out of 5120 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 38 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
// Phase 1: matrix 4096 rows 5120 cols
[2023-03-19 03:19:22] [INFO ] Computed 1024 place invariants in 74 ms
[2023-03-19 03:19:22] [INFO ] Implicit Places using invariants in 710 ms returned []
[2023-03-19 03:19:22] [INFO ] Invariant cache hit.
[2023-03-19 03:19:23] [INFO ] Implicit Places using invariants and state equation in 544 ms returned []
Implicit Place search using SMT with State Equation took 1259 ms to find 0 implicit places.
[2023-03-19 03:19:23] [INFO ] Invariant cache hit.
[2023-03-19 03:19:26] [INFO ] Dead Transitions using invariants and state equation in 2939 ms found 0 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 4238 ms. Remains : 5120/5120 places, 4096/4096 transitions.
Support contains 5120 out of 5120 places after structural reductions.
[2023-03-19 03:19:26] [INFO ] Flatten gal took : 419 ms
[2023-03-19 03:19:27] [INFO ] Flatten gal took : 282 ms
[2023-03-19 03:19:28] [INFO ] Input system was already deterministic with 4096 transitions.
Incomplete random walk after 10000 steps, including 47 resets, run finished after 6759 ms. (steps per millisecond=1 ) properties (out of 62) seen :38
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 41 ms. (steps per millisecond=24 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 25 ms. (steps per millisecond=40 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 40 ms. (steps per millisecond=25 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 38 ms. (steps per millisecond=26 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 47 ms. (steps per millisecond=21 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 25 ms. (steps per millisecond=40 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 123 ms. (steps per millisecond=8 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 25 ms. (steps per millisecond=40 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 24 ms. (steps per millisecond=41 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 39 ms. (steps per millisecond=25 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 47 ms. (steps per millisecond=21 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 37 ms. (steps per millisecond=27 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 24 ms. (steps per millisecond=41 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 39 ms. (steps per millisecond=25 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 39 ms. (steps per millisecond=25 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 132 ms. (steps per millisecond=7 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 24 ms. (steps per millisecond=41 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 37 ms. (steps per millisecond=27 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 23 ms. (steps per millisecond=43 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 127 ms. (steps per millisecond=7 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 52 ms. (steps per millisecond=19 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 29 ms. (steps per millisecond=34 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 102 ms. (steps per millisecond=9 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 25 ms. (steps per millisecond=40 ) properties (out of 24) seen :0
Running SMT prover for 24 properties.
[2023-03-19 03:19:36] [INFO ] Invariant cache hit.
[2023-03-19 03:19:43] [INFO ] [Real]Absence check using 1024 positive place invariants in 350 ms returned sat
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Error writing to Z3 solver: java.io.IOException: Stream closed...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:251)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:629)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMTIncremental(DeadlockTester.java:339)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMT(DeadlockTester.java:223)
at fr.lip6.move.gal.application.solver.ReachabilitySolver.applyReductions(ReachabilitySolver.java:95)
at fr.lip6.move.gal.application.solver.logic.AtomicReducerSR.checkAtomicPropositionsLogic(AtomicReducerSR.java:105)
at fr.lip6.move.gal.application.solver.logic.AtomicReducerSR.strongReductions(AtomicReducerSR.java:44)
at fr.lip6.move.gal.application.solver.ltl.LTLPropertySolver.preSolveForLogic(LTLPropertySolver.java:176)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:626)
at fr.lip6.move.gal.application.Application.start(Application.java:178)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
at org.eclipse.equinox.launcher.Main.run(Main.java:1467)
at org.eclipse.equinox.launcher.Main.main(Main.java:1440)
[2023-03-19 03:20:05] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
[2023-03-19 03:20:05] [INFO ] After 25048ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0
Fused 24 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 5120 out of 5120 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 72 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 73 ms. Remains : 5120/5120 places, 4096/4096 transitions.
Incomplete random walk after 10000 steps, including 47 resets, run finished after 5880 ms. (steps per millisecond=1 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 24 ms. (steps per millisecond=41 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 25 ms. (steps per millisecond=40 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 39 ms. (steps per millisecond=25 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 39 ms. (steps per millisecond=25 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 45 ms. (steps per millisecond=22 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 24 ms. (steps per millisecond=41 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 123 ms. (steps per millisecond=8 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 23 ms. (steps per millisecond=43 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 23 ms. (steps per millisecond=43 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 38 ms. (steps per millisecond=26 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 46 ms. (steps per millisecond=21 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 36 ms. (steps per millisecond=27 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 24 ms. (steps per millisecond=41 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 37 ms. (steps per millisecond=27 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 37 ms. (steps per millisecond=27 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 128 ms. (steps per millisecond=7 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 23 ms. (steps per millisecond=43 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 38 ms. (steps per millisecond=26 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 24 ms. (steps per millisecond=41 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 127 ms. (steps per millisecond=7 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 53 ms. (steps per millisecond=18 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 29 ms. (steps per millisecond=34 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 98 ms. (steps per millisecond=10 ) properties (out of 24) seen :0
Incomplete Best-First random walk after 1001 steps, including 0 resets, run finished after 23 ms. (steps per millisecond=43 ) properties (out of 24) seen :0
Probabilistic random walk after 89929 steps, saw 89906 distinct states, run finished after 18149 ms. (steps per millisecond=4 ) properties seen :0
Running SMT prover for 24 properties.
[2023-03-19 03:20:30] [INFO ] Invariant cache hit.
[2023-03-19 03:20:36] [INFO ] [Real]Absence check using 1024 positive place invariants in 364 ms returned sat
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Error writing to Z3 solver: java.io.IOException: Stream closed...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:251)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:629)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMTIncremental(DeadlockTester.java:339)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMT(DeadlockTester.java:223)
at fr.lip6.move.gal.application.solver.ReachabilitySolver.applyReductions(ReachabilitySolver.java:95)
at fr.lip6.move.gal.application.solver.logic.AtomicReducerSR.checkAtomicPropositionsLogic(AtomicReducerSR.java:105)
at fr.lip6.move.gal.application.solver.logic.AtomicReducerSR.strongReductions(AtomicReducerSR.java:44)
at fr.lip6.move.gal.application.solver.ltl.LTLPropertySolver.preSolveForLogic(LTLPropertySolver.java:176)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:626)
at fr.lip6.move.gal.application.Application.start(Application.java:178)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
at org.eclipse.equinox.launcher.Main.run(Main.java:1467)
at org.eclipse.equinox.launcher.Main.main(Main.java:1440)
[2023-03-19 03:20:58] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
[2023-03-19 03:20:58] [INFO ] After 25050ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0
Fused 24 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 5120 out of 5120 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 48 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 48 ms. Remains : 5120/5120 places, 4096/4096 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 42 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
[2023-03-19 03:20:58] [INFO ] Invariant cache hit.
[2023-03-19 03:20:59] [INFO ] Implicit Places using invariants in 517 ms returned []
[2023-03-19 03:20:59] [INFO ] Invariant cache hit.
[2023-03-19 03:20:59] [INFO ] Implicit Places using invariants and state equation in 522 ms returned []
Implicit Place search using SMT with State Equation took 1043 ms to find 0 implicit places.
[2023-03-19 03:21:00] [INFO ] Redundant transitions in 287 ms returned []
[2023-03-19 03:21:00] [INFO ] Invariant cache hit.
[2023-03-19 03:21:02] [INFO ] Dead Transitions using invariants and state equation in 2893 ms found 0 transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 4276 ms. Remains : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 41 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Running SMT prover for 24 properties.
[2023-03-19 03:21:03] [INFO ] Invariant cache hit.
[2023-03-19 03:21:07] [INFO ] [Real]Absence check using 1024 positive place invariants in 340 ms returned sat
java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Error writing to Z3 solver: java.io.IOException: Stream closed...
at fr.lip6.move.gal.structural.smt.SMTUtils.execAndCheckResult(SMTUtils.java:251)
at fr.lip6.move.gal.structural.smt.DeadlockTester.verifyPossible(DeadlockTester.java:629)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMTIncremental(DeadlockTester.java:339)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMT(DeadlockTester.java:223)
at fr.lip6.move.gal.structural.smt.DeadlockTester.testUnreachableWithSMT(DeadlockTester.java:215)
at fr.lip6.move.gal.application.solver.ReachabilitySolver.applyReductions(ReachabilitySolver.java:273)
at fr.lip6.move.gal.application.solver.logic.AtomicReducerSR.checkAtomicPropositionsLogic(AtomicReducerSR.java:105)
at fr.lip6.move.gal.application.solver.logic.AtomicReducerSR.strongReductions(AtomicReducerSR.java:44)
at fr.lip6.move.gal.application.solver.ltl.LTLPropertySolver.preSolveForLogic(LTLPropertySolver.java:176)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:626)
at fr.lip6.move.gal.application.Application.start(Application.java:178)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:45)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596)
at org.eclipse.equinox.launcher.Main.run(Main.java:1467)
at org.eclipse.equinox.launcher.Main.main(Main.java:1440)
[2023-03-19 03:24:50] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
[2023-03-19 03:24:50] [INFO ] After 225058ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0
[2023-03-19 03:24:50] [INFO ] Flatten gal took : 226 ms
[2023-03-19 03:24:51] [INFO ] Flatten gal took : 235 ms
[2023-03-19 03:24:52] [INFO ] Input system was already deterministic with 4096 transitions.
Computed a total of 5120 stabilizing places and 4096 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 5120 transition count 4096
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 13 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 14 ms. Remains : 5120/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:52] [INFO ] Flatten gal took : 182 ms
[2023-03-19 03:24:52] [INFO ] Flatten gal took : 186 ms
[2023-03-19 03:24:53] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Reduce places removed 4096 places and 0 transitions.
Iterating post reduction 0 with 4096 rules applied. Total rules applied 4096 place count 1024 transition count 4096
Applied a total of 4096 rules in 126 ms. Remains 1024 /5120 variables (removed 4096) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 128 ms. Remains : 1024/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:53] [INFO ] Flatten gal took : 144 ms
[2023-03-19 03:24:53] [INFO ] Flatten gal took : 155 ms
[2023-03-19 03:24:53] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 166 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 166 ms. Remains : 5120/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:54] [INFO ] Flatten gal took : 175 ms
[2023-03-19 03:24:54] [INFO ] Flatten gal took : 184 ms
[2023-03-19 03:24:54] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 11 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 12 ms. Remains : 5120/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:55] [INFO ] Flatten gal took : 174 ms
[2023-03-19 03:24:55] [INFO ] Flatten gal took : 184 ms
[2023-03-19 03:24:55] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 428 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 429 ms. Remains : 5120/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:56] [INFO ] Flatten gal took : 170 ms
[2023-03-19 03:24:56] [INFO ] Flatten gal took : 180 ms
[2023-03-19 03:24:56] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 9 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 11 ms. Remains : 5120/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:56] [INFO ] Flatten gal took : 171 ms
[2023-03-19 03:24:57] [INFO ] Flatten gal took : 181 ms
[2023-03-19 03:24:57] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Reduce places removed 4096 places and 0 transitions.
Iterating post reduction 0 with 4096 rules applied. Total rules applied 4096 place count 1024 transition count 4096
Applied a total of 4096 rules in 45 ms. Remains 1024 /5120 variables (removed 4096) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 46 ms. Remains : 1024/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:57] [INFO ] Flatten gal took : 136 ms
[2023-03-19 03:24:57] [INFO ] Flatten gal took : 149 ms
[2023-03-19 03:24:57] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 9 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 10 ms. Remains : 5120/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:58] [INFO ] Flatten gal took : 179 ms
[2023-03-19 03:24:58] [INFO ] Flatten gal took : 190 ms
[2023-03-19 03:24:58] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 9 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 10 ms. Remains : 5120/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:58] [INFO ] Flatten gal took : 166 ms
[2023-03-19 03:24:59] [INFO ] Flatten gal took : 178 ms
[2023-03-19 03:24:59] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Reduce places removed 4096 places and 0 transitions.
Iterating post reduction 0 with 4096 rules applied. Total rules applied 4096 place count 1024 transition count 4096
Applied a total of 4096 rules in 44 ms. Remains 1024 /5120 variables (removed 4096) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 44 ms. Remains : 1024/5120 places, 4096/4096 transitions.
[2023-03-19 03:24:59] [INFO ] Flatten gal took : 138 ms
[2023-03-19 03:24:59] [INFO ] Flatten gal took : 150 ms
[2023-03-19 03:25:00] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in LTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Reduce places removed 4096 places and 0 transitions.
Iterating post reduction 0 with 4096 rules applied. Total rules applied 4096 place count 1024 transition count 4096
Applied a total of 4096 rules in 167 ms. Remains 1024 /5120 variables (removed 4096) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 168 ms. Remains : 1024/5120 places, 4096/4096 transitions.
[2023-03-19 03:25:00] [INFO ] Flatten gal took : 136 ms
[2023-03-19 03:25:00] [INFO ] Flatten gal took : 149 ms
[2023-03-19 03:25:00] [INFO ] Input system was already deterministic with 4096 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 5120/5120 places, 4096/4096 transitions.
Applied a total of 0 rules in 66 ms. Remains 5120 /5120 variables (removed 0) and now considering 4096/4096 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 68 ms. Remains : 5120/5120 places, 4096/4096 transitions.
[2023-03-19 03:25:01] [INFO ] Flatten gal took : 167 ms
[2023-03-19 03:25:01] [INFO ] Flatten gal took : 179 ms
[2023-03-19 03:25:01] [INFO ] Input system was already deterministic with 4096 transitions.
[2023-03-19 03:25:01] [INFO ] Flatten gal took : 223 ms
[2023-03-19 03:25:02] [INFO ] Flatten gal took : 223 ms
[2023-03-19 03:25:03] [INFO ] Export to MCC of 12 properties in file /home/mcc/execution/CTLCardinality.sr.xml took 39 ms.
[2023-03-19 03:25:03] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 5120 places, 4096 transitions and 20480 arcs took 22 ms.
Total runtime 342776 ms.
There are residual formulas that ITS could not solve within timeout
timeout --kill-after=10s --signal=SIGINT 1m for testing only
Marcie built on Linux at 2019-11-18.
A model checker for Generalized Stochastic Petri nets
authors: Alex Tovchigrechko (IDD package and CTL model checking)
Martin Schwarick (Symbolic numerical analysis and CSL model checking)
Christian Rohr (Simulative and approximative numerical model checking)
marcie@informatik.tu-cottbus.de
called as: /home/mcc/BenchKit/bin//../reducer/bin//../../marcie/bin/marcie --net-file=model.pnml --mcc-file=CTLCardinality.xml --memory=6 --mcc-mode
parse successfull
net created successfully
Net: Petri
(NrP: 5120 NrTr: 4096 NrArc: 20480)
parse formulas
formulas created successfully
place and transition orderings generation:0m 2.765sec
net check time: 0m 0.008sec
init dd package: 0m 2.508sec
TIME LIMIT: Killed by timeout after 3600 seconds
MemTotal: 16393216 kB
MemFree: 9287560 kB
After kill :
MemTotal: 16393216 kB
MemFree: 16084932 kB
BK_TIME_CONFINEMENT_REACHED
--------------------
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 CTLCardinality -timeout 360 -rebuildPNML
check for maximal unmarked siphon
ok
check for constant places
ok
check if there are places and transitions
ok
check if there are transitions without pre-places
ok
check if at least one transition is enabled in m0
ok
check if there are transitions that can never fire
ok
initing FirstDep: 0m 0.030sec
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="Sudoku-COL-BN16"
export BK_EXAMINATION="CTLCardinality"
export BK_TOOL="marciexred"
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 marciexred"
echo " Input is Sudoku-COL-BN16, examination is CTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r490-tall-167912708300153"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/Sudoku-COL-BN16.tgz
mv Sudoku-COL-BN16 execution
cd execution
if [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "UpperBounds" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] || [ "CTLCardinality" = "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 [ "CTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLCardinality" != "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 "CTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLCardinality.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 [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLCardinality"
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 ;