fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r293-tall-167873944900086
Last Updated
May 14, 2023

About the Execution of ITS-Tools for Philosophers-COL-000005

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
272.848 4953.00 10726.00 287.40 FTTTTFTTTTFFFTFT 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.r293-tall-167873944900086.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 itstools
Input is Philosophers-COL-000005, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r293-tall-167873944900086
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 464K
-rw-r--r-- 1 mcc users 5.0K Feb 25 13:06 CTLCardinality.txt
-rw-r--r-- 1 mcc users 46K Feb 25 13:06 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.7K Feb 25 13:06 CTLFireability.txt
-rw-r--r-- 1 mcc users 51K Feb 25 13:06 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.8K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.7K Feb 25 16:32 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Feb 25 16:32 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K Feb 25 16:32 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 16:32 LTLFireability.xml
-rw-r--r-- 1 mcc users 12K Feb 25 13:07 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 122K Feb 25 13:07 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 11K Feb 25 13:06 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 95K Feb 25 13:06 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Feb 25 16:32 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Feb 25 16:32 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 equiv_pt
-rw-r--r-- 1 mcc users 7 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 9.7K 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 Philosophers-COL-000005-ReachabilityCardinality-00
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-01
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-02
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-03
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-04
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-05
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-06
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-07
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-08
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-09
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-10
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-11
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-12
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-13
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-14
FORMULA_NAME Philosophers-COL-000005-ReachabilityCardinality-15

=== Now, execution of the tool begins

BK_START 1678787355157

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=itstools
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=Philosophers-COL-000005
Not applying reductions.
Model is COL
ReachabilityCardinality COL
Running Version 202303021504
[2023-03-14 09:49:16] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2023-03-14 09:49:16] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-14 09:49:16] [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.
[2023-03-14 09:49:17] [WARNING] Using fallBack plugin, rng conformance not checked
[2023-03-14 09:49:17] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 610 ms
[2023-03-14 09:49:17] [INFO ] Imported 5 HL places and 5 HL transitions for a total of 25 PT places and 25.0 transition bindings in 15 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 27 ms.
Working with output stream class java.io.PrintStream
FORMULA Philosophers-COL-000005-ReachabilityCardinality-06 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Philosophers-COL-000005-ReachabilityCardinality-09 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2023-03-14 09:49:17] [INFO ] Built PT skeleton of HLPN with 5 places and 5 transitions 15 arcs in 4 ms.
[2023-03-14 09:49:17] [INFO ] Skeletonized 14 HLPN properties in 1 ms.
Remains 14 properties that can be checked using skeleton over-approximation.
Initial state reduction rules removed 5 formulas.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-07 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Philosophers-COL-000005-ReachabilityCardinality-08 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Philosophers-COL-000005-ReachabilityCardinality-10 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Philosophers-COL-000005-ReachabilityCardinality-12 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Philosophers-COL-000005-ReachabilityCardinality-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Computed a total of 0 stabilizing places and 0 stable transitions
[2023-03-14 09:49:17] [INFO ] Flatten gal took : 14 ms
[2023-03-14 09:49:17] [INFO ] Flatten gal took : 2 ms
Arc [1:1*[(MOD (ADD (MOD (MINUS $x 1) 5) 5) 5)]] contains successor/predecessor on variables of sort Philo
[2023-03-14 09:49:17] [INFO ] Unfolded HLPN to a Petri net with 25 places and 25 transitions 80 arcs in 6 ms.
[2023-03-14 09:49:17] [INFO ] Unfolded 9 HLPN properties in 0 ms.
[2023-03-14 09:49:17] [INFO ] Flatten gal took : 11 ms
[2023-03-14 09:49:17] [INFO ] Flatten gal took : 11 ms
[2023-03-14 09:49:17] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality9757081834013381640.gal : 6 ms
[2023-03-14 09:49:17] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality12642431872185776266.prop : 5 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202303021504/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality9757081834013381640.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality12642431872185776266.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202303021504/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Loading property file /tmp/ReachabilityCardinality12642431872185776266.prop.
SDD proceeding with computation,9 properties remain. new max is 4
SDD size :1 after 6
Reachability property Philosophers-COL-000005-ReachabilityCardinality-01 is true.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-01 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
SDD proceeding with computation,8 properties remain. new max is 4
SDD size :6 after 54
SDD proceeding with computation,8 properties remain. new max is 8
SDD size :54 after 189
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
petri\_inst\_inst,243,0.034078,4388,2,112,9,551,14,0,278,299,0
Total reachable state count : 243

Verifying 9 reachability properties.
Reachability property Philosophers-COL-000005-ReachabilityCardinality-00 does not hold.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-00 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : Philosophers-COL-000005-ReachabilityCardinality-00

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
Philosophers-COL-000005-ReachabilityCardinality-00,0,0.03883,4700,1,0,9,551,14,0,307,299,0
Reachability property Philosophers-COL-000005-ReachabilityCardinality-01 is true.

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
Philosophers-COL-000005-ReachabilityCardinality-01,1,0.03993,4700,2,26,9,551,15,0,334,299,0
Invariant property Philosophers-COL-000005-ReachabilityCardinality-02 is true.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-02 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
Philosophers-COL-000005-ReachabilityCardinality-02,0,0.040318,4700,1,0,9,551,15,0,353,299,0
Invariant property Philosophers-COL-000005-ReachabilityCardinality-03 is true.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-03 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
Philosophers-COL-000005-ReachabilityCardinality-03,0,0.040615,4700,1,0,9,551,15,0,364,299,0
Invariant property Philosophers-COL-000005-ReachabilityCardinality-04 is true.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-04 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
Philosophers-COL-000005-ReachabilityCardinality-04,0,0.040888,4700,1,0,9,551,15,0,375,299,0
Reachability property Philosophers-COL-000005-ReachabilityCardinality-05 does not hold.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-05 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : Philosophers-COL-000005-ReachabilityCardinality-05

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
Philosophers-COL-000005-ReachabilityCardinality-05,0,0.04442,4700,1,0,9,551,15,0,404,299,0
Reachability property Philosophers-COL-000005-ReachabilityCardinality-11 does not hold.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-11 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : Philosophers-COL-000005-ReachabilityCardinality-11

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
Philosophers-COL-000005-ReachabilityCardinality-11,0,0.046842,4700,1,0,9,551,15,0,468,299,0
Invariant property Philosophers-COL-000005-ReachabilityCardinality-13 is true.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-13 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
Philosophers-COL-000005-ReachabilityCardinality-13,0,0.05022,4700,1,0,9,551,15,0,520,299,0
Reachability property Philosophers-COL-000005-ReachabilityCardinality-14 does not hold.
FORMULA Philosophers-COL-000005-ReachabilityCardinality-14 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : Philosophers-COL-000005-ReachabilityCardinality-14

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
Philosophers-COL-000005-ReachabilityCardinality-14,0,0.0507,4700,1,0,9,551,15,0,539,299,0
Incomplete random walk after 10000 steps, including 264 resets, run finished after 736 ms. (steps per millisecond=13 ) properties (out of 9) seen :1
Incomplete Best-First random walk after 10001 steps, including 17 resets, run finished after 237 ms. (steps per millisecond=42 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 277 resets, run finished after 78 ms. (steps per millisecond=128 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 118 ms. (steps per millisecond=84 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 114 ms. (steps per millisecond=87 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 93 ms. (steps per millisecond=107 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 55 ms. (steps per millisecond=181 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 70 ms. (steps per millisecond=142 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 277 resets, run finished after 42 ms. (steps per millisecond=238 ) properties (out of 8) seen :0
Running SMT prover for 8 properties.
// Phase 1: matrix 25 rows 25 cols
[2023-03-14 09:49:19] [INFO ] Computed 10 place invariants in 9 ms
[2023-03-14 09:49:19] [INFO ] [Real]Absence check using 10 positive place invariants in 2 ms returned sat
[2023-03-14 09:49:19] [INFO ] After 140ms SMT Verify possible using all constraints in real domain returned unsat :4 sat :0 real:4
[2023-03-14 09:49:19] [INFO ] [Nat]Absence check using 10 positive place invariants in 3 ms returned sat
[2023-03-14 09:49:19] [INFO ] After 84ms SMT Verify possible using all constraints in natural domain returned unsat :8 sat :0
Fused 8 Parikh solutions to 0 different solutions.
Parikh walk visited 0 properties in 0 ms.
All properties solved without resorting to model-checking.
Total runtime 2679 ms.

BK_STOP 1678787360110

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

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution ReachabilityCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ 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:
++ perl -pe 's/.*\.//g'
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600

Sequence of Actions to be Executed by the VM

This is useful if one wants to reexecute the tool in the VM from the submitted image disk.

set -x
# this is for BenchKit: configuration of major elements for the test
export BK_INPUT="Philosophers-COL-000005"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"

# this is specific to your benchmark or test

export BIN_DIR="$HOME/BenchKit/bin"

# remove the execution directoty if it exists (to avoid increse of .vmdk images)
if [ -d execution ] ; then
rm -rf execution
fi

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-5348"
echo " Executing tool itstools"
echo " Input is Philosophers-COL-000005, examination is ReachabilityCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r293-tall-167873944900086"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/Philosophers-COL-000005.tgz
mv Philosophers-COL-000005 execution
cd execution
if [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "UpperBounds" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] || [ "ReachabilityCardinality" = "StateSpace" ]; then
rm -f GenericPropertiesVerdict.xml
fi
pwd
ls -lh

echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "ReachabilityCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityCardinality" != "StateSpace" ] ; then
echo "The expected result is a vector of booleans"
echo BOOL_VECTOR
else
echo "no data necessary for post analysis"
fi
echo
if [ -f "ReachabilityCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityCardinality.xml" ] ; then # for cunf (txt files deleted;-)
echo echo "here is the order used to build the result vector(from xml file)"
for x in $(grep '' ReachabilityCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityCardinality"
fi
echo
echo "=== Now, execution of the tool begins"
echo
echo -n "BK_START "
date -u +%s%3N
echo
timeout -s 9 $BK_TIME_CONFINEMENT bash -c "/home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n \"BK_STOP \" ; date -u +%s%3N"
if [ $? -eq 137 ] ; then
echo
echo "BK_TIME_CONFINEMENT_REACHED"
fi
echo
echo "--------------------"
echo "content from stderr:"
echo
cat STDERR ;