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.r229-tall-165286033900197.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 ShieldIIPt-PT-040B, examination is QuasiLiveness
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r229-tall-165286033900197
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 924K
-rw-r--r-- 1 mcc users 6.0K Apr 29 18:28 CTLCardinality.txt
-rw-r--r-- 1 mcc users 61K Apr 29 18:28 CTLCardinality.xml
-rw-r--r-- 1 mcc users 7.1K Apr 29 18:28 CTLFireability.txt
-rw-r--r-- 1 mcc users 69K Apr 29 18:28 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 10 09:34 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.8K May 9 08:51 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K May 9 08:51 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K May 9 08:51 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K May 9 08:51 LTLFireability.xml
-rw-r--r-- 1 mcc users 1.6K May 9 08:51 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K May 9 08:51 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 10 09:34 equiv_col
-rw-r--r-- 1 mcc users 5 May 10 09:34 instance
-rw-r--r-- 1 mcc users 6 May 10 09:34 iscolored
-rw-r--r-- 1 mcc users 686K May 10 09:34 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 QuasiLiveness

=== Now, execution of the tool begins

BK_START 1653032760729

Running Version 202205111006
[2022-05-20 07:46:01] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, QuasiLiveness, -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]
[2022-05-20 07:46:01] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-05-20 07:46:02] [INFO ] Load time of PNML (sax parser for PT used): 186 ms
[2022-05-20 07:46:02] [INFO ] Transformed 2803 places.
[2022-05-20 07:46:02] [INFO ] Transformed 2603 transitions.
[2022-05-20 07:46:02] [INFO ] Found NUPN structural information;
[2022-05-20 07:46:02] [INFO ] Parsed PT model containing 2803 places and 2603 transitions in 384 ms.
Starting structural reductions in LIVENESS mode, iteration 0 : 2803/2803 places, 2603/2603 transitions.
Drop transitions removed 682 transitions
Trivial Post-agglo rules discarded 682 transitions
Performed 682 trivial Post agglomeration. Transition count delta: 682
Iterating post reduction 0 with 682 rules applied. Total rules applied 682 place count 2803 transition count 1921
Reduce places removed 682 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Drop transitions removed 1 transitions
Trivial Post-agglo rules discarded 1 transitions
Performed 1 trivial Post agglomeration. Transition count delta: 1
Iterating post reduction 1 with 684 rules applied. Total rules applied 1366 place count 2121 transition count 1919
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 1367 place count 2120 transition count 1919
Performed 161 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 161 Pre rules applied. Total rules applied 1367 place count 2120 transition count 1758
Deduced a syphon composed of 161 places in 24 ms
Reduce places removed 161 places and 0 transitions.
Iterating global reduction 3 with 322 rules applied. Total rules applied 1689 place count 1959 transition count 1758
Discarding 280 places :
Symmetric choice reduction at 3 with 280 rule applications. Total rules 1969 place count 1679 transition count 1478
Iterating global reduction 3 with 280 rules applied. Total rules applied 2249 place count 1679 transition count 1478
Performed 120 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 120 Pre rules applied. Total rules applied 2249 place count 1679 transition count 1358
Deduced a syphon composed of 120 places in 11 ms
Reduce places removed 120 places and 0 transitions.
Iterating global reduction 3 with 240 rules applied. Total rules applied 2489 place count 1559 transition count 1358
Performed 679 Post agglomeration using F-continuation condition.Transition count delta: 679
Deduced a syphon composed of 679 places in 5 ms
Reduce places removed 679 places and 0 transitions.
Iterating global reduction 3 with 1358 rules applied. Total rules applied 3847 place count 880 transition count 679
Renaming transitions due to excessive name length > 1024 char.
Performed 101 Post agglomeration using F-continuation condition.Transition count delta: -66
Deduced a syphon composed of 101 places in 3 ms
Reduce places removed 101 places and 0 transitions.
Iterating global reduction 3 with 202 rules applied. Total rules applied 4049 place count 779 transition count 745
Performed 18 Post agglomeration using F-continuation condition.Transition count delta: -13
Deduced a syphon composed of 18 places in 4 ms
Reduce places removed 18 places and 0 transitions.
Iterating global reduction 3 with 36 rules applied. Total rules applied 4085 place count 761 transition count 758
Applied a total of 4085 rules in 870 ms. Remains 761 /2803 variables (removed 2042) and now considering 758/2603 (removed 1845) transitions.
// Phase 1: matrix 758 rows 761 cols
[2022-05-20 07:46:03] [INFO ] Computed 361 place invariants in 24 ms
[2022-05-20 07:46:03] [INFO ] Implicit Places using invariants in 683 ms returned [753, 754]
Discarding 2 places :
Implicit Place search using SMT only with invariants took 712 ms to find 2 implicit places.
Starting structural reductions in LIVENESS mode, iteration 1 : 759/2803 places, 758/2603 transitions.
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 0 with 1 Pre rules applied. Total rules applied 0 place count 759 transition count 757
Deduced a syphon composed of 1 places in 4 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 0 with 2 rules applied. Total rules applied 2 place count 758 transition count 757
Applied a total of 2 rules in 31 ms. Remains 758 /759 variables (removed 1) and now considering 757/758 (removed 1) transitions.
// Phase 1: matrix 757 rows 758 cols
[2022-05-20 07:46:03] [INFO ] Computed 359 place invariants in 4 ms
[2022-05-20 07:46:04] [INFO ] Implicit Places using invariants in 423 ms returned [747]
Discarding 1 places :
Implicit Place search using SMT only with invariants took 425 ms to find 1 implicit places.
Starting structural reductions in LIVENESS mode, iteration 2 : 757/2803 places, 757/2603 transitions.
Performed 1 Post agglomeration using F-continuation condition.Transition count delta: 1
Deduced a syphon composed of 1 places in 3 ms
Reduce places removed 1 places and 0 transitions.
Iterating global reduction 0 with 2 rules applied. Total rules applied 2 place count 756 transition count 756
Applied a total of 2 rules in 31 ms. Remains 756 /757 variables (removed 1) and now considering 756/757 (removed 1) transitions.
// Phase 1: matrix 756 rows 756 cols
[2022-05-20 07:46:04] [INFO ] Computed 358 place invariants in 6 ms
[2022-05-20 07:46:04] [INFO ] Implicit Places using invariants in 420 ms returned []
// Phase 1: matrix 756 rows 756 cols
[2022-05-20 07:46:04] [INFO ] Computed 358 place invariants in 9 ms
[2022-05-20 07:46:05] [INFO ] State equation strengthened by 357 read => feed constraints.
[2022-05-20 07:46:08] [INFO ] Implicit Places using invariants and state equation in 3499 ms returned []
Implicit Place search using SMT with State Equation took 3923 ms to find 0 implicit places.
Starting structural reductions in LIVENESS mode, iteration 3 : 756/2803 places, 756/2603 transitions.
Finished structural reductions, in 3 iterations. Remains : 756/2803 places, 756/2603 transitions.
Discarding 357 transitions out of 756. Remains 399
Initial state reduction rules removed 1 formulas.
Incomplete random walk after 10000 steps, including 2 resets, run finished after 863 ms. (steps per millisecond=11 ) properties (out of 398) seen :161
Incomplete Best-First random walk after 100 steps, including 2 resets, run finished after 10 ms. (steps per millisecond=10 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 4 ms. (steps per millisecond=25 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 4 ms. (steps per millisecond=25 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 100 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 4 ms. (steps per millisecond=25 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 100 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 100 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 100 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 4 ms. (steps per millisecond=25 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 4 ms. (steps per millisecond=25 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 4 ms. (steps per millisecond=25 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 100 steps, including 2 resets, run finished after 4 ms. (steps per millisecond=25 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 100 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 101 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Incomplete Best-First random walk after 100 steps, including 2 resets, run finished after 3 ms. (steps per millisecond=33 ) properties (out of 237) seen :0
Running SMT prover for 237 properties.
// Phase 1: matrix 756 rows 756 cols
[2022-05-20 07:46:09] [INFO ] Computed 358 place invariants in 4 ms
[2022-05-20 07:46:12] [INFO ] [Real]Absence check using 358 positive place invariants in 52 ms returned sat
[2022-05-20 07:46:29] [INFO ] After 14035ms SMT Verify possible using state equation in real domain returned unsat :0 sat :9 real:228
[2022-05-20 07:46:29] [INFO ] State equation strengthened by 357 read => feed constraints.
[2022-05-20 07:46:30] [INFO ] After 611ms SMT Verify possible using 357 Read/Feed constraints in real domain returned unsat :0 sat :0 real:237
[2022-05-20 07:46:30] [INFO ] After 20693ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:237
[2022-05-20 07:46:32] [INFO ] [Nat]Absence check using 358 positive place invariants in 54 ms returned sat
[2022-05-20 07:46:55] [INFO ] After 19379ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :236
[2022-05-20 07:46:55] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
[2022-05-20 07:46:55] [INFO ] After 25027ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :0 real:237
Fused 237 Parikh solutions to 220 different solutions.
Finished Parikh walk after 996 steps, including 0 resets, run visited all 30 properties in 40 ms. (steps per millisecond=24 )
Parikh walk visited 237 properties in 6344 ms.
Able to resolve query QuasiLiveness after proving 399 properties.
FORMULA QuasiLiveness TRUE TECHNIQUES RANDOM_WALK PARIKH_WALK TOPOLOGICAL INITIAL_STATE
Total runtime 59701 ms.

BK_STOP 1653032821619

--------------------
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
+ [[ QuasiLiveness = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution QuasiLiveness -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 QuasiLiveness -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="ShieldIIPt-PT-040B"
export BK_EXAMINATION="QuasiLiveness"
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 ShieldIIPt-PT-040B, examination is QuasiLiveness"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r229-tall-165286033900197"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/ShieldIIPt-PT-040B.tgz
mv ShieldIIPt-PT-040B execution
cd execution
if [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "UpperBounds" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] || [ "QuasiLiveness" = "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 [ "QuasiLiveness" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "QuasiLiveness" != "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 "QuasiLiveness.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property QuasiLiveness.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "QuasiLiveness.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 '' QuasiLiveness.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] ; then
echo "FORMULA_NAME QuasiLiveness"
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 ;