Execution Chart

We display below the execution chart for this examination (boot time has been removed).

Trace from the execution

Formatting '/data/fkordon/mcc2022-input.r053-smll-165252139200208.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2022-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 2-4028
Executing tool itstools
Input is CloudReconfiguration-PT-316, examination is StableMarking
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r053-smll-165252139200208
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 904K
-rw-r--r-- 1 mcc users 8.1K Apr 29 14:26 CTLCardinality.txt
-rw-r--r-- 1 mcc users 87K Apr 29 14:26 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.2K Apr 29 14:26 CTLFireability.txt
-rw-r--r-- 1 mcc users 54K Apr 29 14:26 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 10 09:33 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.8K May 9 07:20 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K May 9 07:20 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K May 9 07:20 LTLFireability.txt
-rw-r--r-- 1 mcc users 16K May 9 07:20 LTLFireability.xml
-rw-r--r-- 1 mcc users 1.8K May 9 07:20 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K May 9 07:20 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 10 09:33 equiv_col
-rw-r--r-- 1 mcc users 4 May 10 09:33 instance
-rw-r--r-- 1 mcc users 6 May 10 09:33 iscolored
-rw-r--r-- 1 mcc users 660K May 10 09:33 model.pnml

--------------------
content from stdout:

=== Data for post analysis generated by BenchKit (invocation template)

The expected result is a vector of booleans
BOOL_VECTOR

FORMULA_NAME StableMarking

=== Now, execution of the tool begins

BK_START 1652605039503

Running Version 202205111006
[2022-05-15 08:57:22] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, StableMarking, -spotpath, /home/mcc/BenchKit/bin//..//ltlfilt, -z3path, /home/mcc/BenchKit/bin//..//z3/bin/z3, -yices2path, /home/mcc/BenchKit/bin//..//yices/bin/yices, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 1800]
[2022-05-15 08:57:22] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-05-15 08:57:22] [INFO ] Load time of PNML (sax parser for PT used): 493 ms
[2022-05-15 08:57:22] [INFO ] Transformed 2585 places.
[2022-05-15 08:57:22] [INFO ] Transformed 3095 transitions.
[2022-05-15 08:57:22] [INFO ] Found NUPN structural information;
[2022-05-15 08:57:22] [INFO ] Parsed PT model containing 2585 places and 3095 transitions in 780 ms.
Graph (trivial) has 2956 edges and 2585 vertex of which 882 / 2585 are part of one of the 63 SCC in 23 ms
Free SCC test removed 819 places
Structural test allowed to assert that 867 places are NOT stable. Took 60 ms.
Ensure Unique test removed 936 transitions
Reduce redundant transitions removed 936 transitions.
Incomplete random walk after 10000 steps, including 183 resets, run finished after 2290 ms. (steps per millisecond=4 ) properties (out of 1718) seen :190
Running SMT prover for 1528 properties.
[2022-05-15 08:57:25] [INFO ] Flow matrix only has 2097 transitions (discarded 62 similar events)
// Phase 1: matrix 2097 rows 1766 cols
[2022-05-15 08:57:25] [INFO ] Computed 4 place invariants in 44 ms
[2022-05-15 08:57:52] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
[2022-05-15 08:57:52] [INFO ] After 25085ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0
Fused 1528 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 2 ms.
Support contains 1528 out of 1766 places. Attempting structural reductions.
Starting structural reductions in SAFETY mode, iteration 0 : 1766/1766 places, 2159/2159 transitions.
Drop transitions removed 63 transitions
Reduce isomorphic transitions removed 63 transitions.
Drop transitions removed 136 transitions
Trivial Post-agglo rules discarded 136 transitions
Performed 136 trivial Post agglomeration. Transition count delta: 136
Iterating post reduction 0 with 199 rules applied. Total rules applied 199 place count 1766 transition count 1960
Reduce places removed 136 places and 0 transitions.
Ensure Unique test removed 5 transitions
Reduce isomorphic transitions removed 5 transitions.
Iterating post reduction 1 with 141 rules applied. Total rules applied 340 place count 1630 transition count 1955
Performed 9 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 2 with 9 Pre rules applied. Total rules applied 340 place count 1630 transition count 1946
Deduced a syphon composed of 9 places in 6 ms
Reduce places removed 9 places and 0 transitions.
Iterating global reduction 2 with 18 rules applied. Total rules applied 358 place count 1621 transition count 1946
Discarding 7 places :
Symmetric choice reduction at 2 with 7 rule applications. Total rules 365 place count 1614 transition count 1939
Iterating global reduction 2 with 7 rules applied. Total rules applied 372 place count 1614 transition count 1939
Performed 20 Post agglomeration using F-continuation condition.Transition count delta: 20
Deduced a syphon composed of 20 places in 10 ms
Reduce places removed 20 places and 0 transitions.
Iterating global reduction 2 with 40 rules applied. Total rules applied 412 place count 1594 transition count 1919
Performed 5 Post agglomeration using F-continuation condition.Transition count delta: -32
Deduced a syphon composed of 5 places in 9 ms
Reduce places removed 5 places and 0 transitions.
Iterating global reduction 2 with 10 rules applied. Total rules applied 422 place count 1589 transition count 1951
Drop transitions removed 6 transitions
Redundant transition composition rules discarded 6 transitions
Iterating global reduction 2 with 6 rules applied. Total rules applied 428 place count 1589 transition count 1945
Free-agglomeration rule applied 19 times.
Iterating global reduction 2 with 19 rules applied. Total rules applied 447 place count 1589 transition count 1926
Reduce places removed 19 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 2 with 20 rules applied. Total rules applied 467 place count 1570 transition count 1925
Drop transitions removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 3 with 2 rules applied. Total rules applied 469 place count 1570 transition count 1923
Partial Free-agglomeration rule applied 1 times.
Drop transitions removed 1 transitions
Iterating global reduction 3 with 1 rules applied. Total rules applied 470 place count 1570 transition count 1923
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 3 with 1 rules applied. Total rules applied 471 place count 1569 transition count 1922
Applied a total of 471 rules in 762 ms. Remains 1569 /1766 variables (removed 197) and now considering 1922/2159 (removed 237) transitions.
Finished structural reductions, in 1 iterations. Remains : 1569/1766 places, 1922/2159 transitions.
Interrupted random walk after 257505 steps, including 1043 resets, run timeout after 30001 ms. (steps per millisecond=8 ) properties seen 912
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 31 ms. (steps per millisecond=32 ) properties (out of 616) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 34 ms. (steps per millisecond=29 ) properties (out of 616) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 32 ms. (steps per millisecond=31 ) properties (out of 616) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 31 ms. (steps per millisecond=32 ) properties (out of 616) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 31 ms. (steps per millisecond=32 ) properties (out of 616) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 28 ms. (steps per millisecond=35 ) properties (out of 616) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 29 ms. (steps per millisecond=34 ) properties (out of 616) seen :0
Incomplete Best-First random walk after 1001 steps, including 3 resets, run finished after 24 ms. (steps per millisecond=41 ) properties (out of 616) seen :8
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 27 ms. (steps per millisecond=37 ) properties (out of 608) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 36 ms. (steps per millisecond=27 ) properties (out of 608) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 30 ms. (steps per millisecond=33 ) properties (out of 608) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 29 ms. (steps per millisecond=34 ) properties (out of 608) seen :1
Incomplete Best-First random walk after 1001 steps, including 3 resets, run finished after 23 ms. (steps per millisecond=43 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 31 ms. (steps per millisecond=32 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 29 ms. (steps per millisecond=34 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 27 ms. (steps per millisecond=37 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 3 resets, run finished after 27 ms. (steps per millisecond=37 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 30 ms. (steps per millisecond=33 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 28 ms. (steps per millisecond=35 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 29 ms. (steps per millisecond=34 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 29 ms. (steps per millisecond=34 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 25 ms. (steps per millisecond=40 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 37 ms. (steps per millisecond=27 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 40 ms. (steps per millisecond=25 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 36 ms. (steps per millisecond=27 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 42 ms. (steps per millisecond=23 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 41 ms. (steps per millisecond=24 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 40 ms. (steps per millisecond=25 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 3 resets, run finished after 39 ms. (steps per millisecond=25 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 40 ms. (steps per millisecond=25 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 38 ms. (steps per millisecond=26 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 34 ms. (steps per millisecond=29 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 36 ms. (steps per millisecond=27 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 34 ms. (steps per millisecond=29 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 40 ms. (steps per millisecond=25 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 36 ms. (steps per millisecond=27 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 27 ms. (steps per millisecond=37 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 3 resets, run finished after 26 ms. (steps per millisecond=38 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 27 ms. (steps per millisecond=37 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 34 ms. (steps per millisecond=29 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 27 ms. (steps per millisecond=37 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 30 ms. (steps per millisecond=33 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 30 ms. (steps per millisecond=33 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 25 ms. (steps per millisecond=40 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 30 ms. (steps per millisecond=33 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 30 ms. (steps per millisecond=33 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 31 ms. (steps per millisecond=32 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 30 ms. (steps per millisecond=33 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 26 ms. (steps per millisecond=38 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 31 ms. (steps per millisecond=32 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 31 ms. (steps per millisecond=32 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 3 resets, run finished after 27 ms. (steps per millisecond=37 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 38 ms. (steps per millisecond=26 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 27 ms. (steps per millisecond=37 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 33 ms. (steps per millisecond=30 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 3 resets, run finished after 34 ms. (steps per millisecond=29 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 39 ms. (steps per millisecond=25 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 2 resets, run finished after 34 ms. (steps per millisecond=29 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 3 resets, run finished after 32 ms. (steps per millisecond=31 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1001 steps, including 3 resets, run finished after 34 ms. (steps per millisecond=29 ) properties (out of 607) seen :0
Incomplete Best-First random walk after 1000 steps, including 2 resets, run finished after 31 ms. (steps per millisecond=32 ) properties (out of 607) seen :0
Running SMT prover for 607 properties.
[2022-05-15 08:58:25] [INFO ] Flow matrix only has 1921 transitions (discarded 1 similar events)
// Phase 1: matrix 1921 rows 1569 cols
[2022-05-15 08:58:25] [INFO ] Computed 4 place invariants in 21 ms
[2022-05-15 08:58:59] [INFO ] After 33912ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:607
[2022-05-15 08:59:26] [INFO ] [Nat]Absence check using 0 positive and 4 generalized place invariants in 48 ms returned sat
[2022-05-15 09:01:00] [INFO ] After 67568ms SMT Verify possible using state equation in natural domain returned unsat :1 sat :606
[2022-05-15 09:01:00] [INFO ] State equation strengthened by 1 read => feed constraints.
[2022-05-15 09:01:49] [INFO ] After 48776ms SMT Verify possible using 1 Read/Feed constraints in natural domain returned unsat :1 sat :606
[2022-05-15 09:02:44] [INFO ] After 103594ms SMT Verify possible using trap constraints in natural domain returned unsat :1 sat :606
Attempting to minimize the solution found.
Minimization took 6 ms.
[2022-05-15 09:02:44] [INFO ] After 225089ms SMT Verify possible using all constraints in natural domain returned unsat :1 sat :606
FORMULA StableMarking TRUE TECHNIQUES RANDOM_WALK STRUCTURAL_REDUCTION MARKED_SUFFIX_TEST TRIVIAL_UNMARKED_SCC_TEST BESTFIRST_WALK TOPOLOGICAL SAT_SMT
Total runtime 322380 ms.

BK_STOP 1652605364550

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

+ export LANG=C
+ LANG=C
+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ StableMarking = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution StableMarking -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800
+ ulimit -s 65536
+ export PYTHONPATH=/usr/lib/python3.9/site-packages/
+ PYTHONPATH=/usr/lib/python3.9/site-packages/
+ export LD_LIBRARY_PATH=/usr/local/lib:
+ LD_LIBRARY_PATH=/usr/local/lib:
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202205111006.jar
+ VERSION=202205111006
+ echo 'Running Version 202205111006'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data @none -pnfolder /home/mcc/execution -examination StableMarking -spotpath /home/mcc/BenchKit/bin//..//ltlfilt -z3path /home/mcc/BenchKit/bin//..//z3/bin/z3 -yices2path /home/mcc/BenchKit/bin//..//yices/bin/yices -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800 -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=@none -Xss128m -Xms40m -Xmx8192m

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="CloudReconfiguration-PT-316"
export BK_EXAMINATION="StableMarking"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="1800"
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 2-4028"
echo " Executing tool itstools"
echo " Input is CloudReconfiguration-PT-316, examination is StableMarking"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r053-smll-165252139200208"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/CloudReconfiguration-PT-316.tgz
mv CloudReconfiguration-PT-316 execution
cd execution
if [ "StableMarking" = "ReachabilityDeadlock" ] || [ "StableMarking" = "UpperBounds" ] || [ "StableMarking" = "QuasiLiveness" ] || [ "StableMarking" = "StableMarking" ] || [ "StableMarking" = "Liveness" ] || [ "StableMarking" = "OneSafe" ] || [ "StableMarking" = "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 [ "StableMarking" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "StableMarking" != "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 "StableMarking.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property StableMarking.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "StableMarking.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 '' StableMarking.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "StableMarking" = "ReachabilityDeadlock" ] || [ "StableMarking" = "QuasiLiveness" ] || [ "StableMarking" = "StableMarking" ] || [ "StableMarking" = "Liveness" ] || [ "StableMarking" = "OneSafe" ] ; then
echo "FORMULA_NAME StableMarking"
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 ;