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.r101-tall-167814475000185.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 DBSingleClientW-PT-d0m05, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r101-tall-167814475000185
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 620K
-rw-r--r-- 1 mcc users 8.5K Feb 26 15:17 CTLCardinality.txt
-rw-r--r-- 1 mcc users 96K Feb 26 15:17 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.8K Feb 26 15:16 CTLFireability.txt
-rw-r--r-- 1 mcc users 40K Feb 26 15:16 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.6K Feb 25 15:48 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Feb 25 15:48 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K Feb 25 15:48 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 15:48 LTLFireability.xml
-rw-r--r-- 1 mcc users 14K Feb 26 15:18 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 153K Feb 26 15:18 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 9.8K Feb 26 15:17 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 88K Feb 26 15:17 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Feb 25 15:48 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Feb 25 15:48 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 119K Mar 5 18:22 model.pnml

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

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

The expected result is a vector of booleans
BOOL_VECTOR

here is the order used to build the result vector(from text file)
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-00
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-01
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-02
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-03
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-04
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-05
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-06
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-07
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-08
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-09
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-10
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-11
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-12
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-13
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-14
FORMULA_NAME DBSingleClientW-PT-d0m05-CTLCardinality-15

=== Now, execution of the tool begins

BK_START 1678237442672

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=CTLCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=DBSingleClientW-PT-d0m05
Not applying reductions.
Model is PT
CTLCardinality PT
Running Version 202303021504
[2023-03-08 01:04:04] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLCardinality, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2023-03-08 01:04:04] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-08 01:04:04] [INFO ] Load time of PNML (sax parser for PT used): 61 ms
[2023-03-08 01:04:04] [INFO ] Transformed 553 places.
[2023-03-08 01:04:04] [INFO ] Transformed 150 transitions.
[2023-03-08 01:04:04] [INFO ] Parsed PT model containing 553 places and 150 transitions and 600 arcs in 125 ms.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 12 ms.
Deduced a syphon composed of 444 places in 1 ms
Reduce places removed 444 places and 0 transitions.
Initial state reduction rules removed 2 formulas.
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-01 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-02 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-06 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-07 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-08 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-10 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-15 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 15 out of 109 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 109/109 places, 150/150 transitions.
Reduce places removed 7 places and 0 transitions.
Ensure Unique test removed 11 transitions
Reduce isomorphic transitions removed 11 transitions.
Iterating post reduction 0 with 18 rules applied. Total rules applied 18 place count 102 transition count 139
Discarding 17 places :
Symmetric choice reduction at 1 with 17 rule applications. Total rules 35 place count 85 transition count 107
Iterating global reduction 1 with 17 rules applied. Total rules applied 52 place count 85 transition count 107
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 1 with 1 rules applied. Total rules applied 53 place count 85 transition count 106
Discarding 10 places :
Symmetric choice reduction at 2 with 10 rule applications. Total rules 63 place count 75 transition count 96
Iterating global reduction 2 with 10 rules applied. Total rules applied 73 place count 75 transition count 96
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 74 place count 75 transition count 95
Discarding 1 places :
Symmetric choice reduction at 3 with 1 rule applications. Total rules 75 place count 74 transition count 94
Iterating global reduction 3 with 1 rules applied. Total rules applied 76 place count 74 transition count 94
Discarding 1 places :
Symmetric choice reduction at 3 with 1 rule applications. Total rules 77 place count 73 transition count 92
Iterating global reduction 3 with 1 rules applied. Total rules applied 78 place count 73 transition count 92
Applied a total of 78 rules in 25 ms. Remains 73 /109 variables (removed 36) and now considering 92/150 (removed 58) transitions.
// Phase 1: matrix 92 rows 73 cols
[2023-03-08 01:04:04] [INFO ] Computed 2 place invariants in 14 ms
[2023-03-08 01:04:04] [INFO ] Implicit Places using invariants in 209 ms returned []
[2023-03-08 01:04:04] [INFO ] Invariant cache hit.
[2023-03-08 01:04:04] [INFO ] State equation strengthened by 30 read => feed constraints.
[2023-03-08 01:04:04] [INFO ] Implicit Places using invariants and state equation in 145 ms returned []
Implicit Place search using SMT with State Equation took 379 ms to find 0 implicit places.
[2023-03-08 01:04:04] [INFO ] Invariant cache hit.
[2023-03-08 01:04:04] [INFO ] Dead Transitions using invariants and state equation in 75 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 73/109 places, 92/150 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 481 ms. Remains : 73/109 places, 92/150 transitions.
Support contains 15 out of 73 places after structural reductions.
[2023-03-08 01:04:04] [INFO ] Initial state reduction rules for CTL removed 3 formulas.
[2023-03-08 01:04:04] [INFO ] Flatten gal took : 27 ms
[2023-03-08 01:04:04] [INFO ] Initial state reduction rules for CTL removed 2 formulas.
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-13 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-12 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-11 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-09 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-03 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2023-03-08 01:04:04] [INFO ] Flatten gal took : 13 ms
[2023-03-08 01:04:04] [INFO ] Input system was already deterministic with 92 transitions.
Support contains 5 out of 73 places (down from 15) after GAL structural reductions.
Incomplete random walk after 10000 steps, including 2270 resets, run finished after 355 ms. (steps per millisecond=28 ) properties (out of 6) seen :1
Incomplete Best-First random walk after 10000 steps, including 1066 resets, run finished after 94 ms. (steps per millisecond=106 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 1034 resets, run finished after 70 ms. (steps per millisecond=142 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10000 steps, including 1250 resets, run finished after 92 ms. (steps per millisecond=108 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 1026 resets, run finished after 63 ms. (steps per millisecond=158 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 1057 resets, run finished after 67 ms. (steps per millisecond=149 ) properties (out of 5) seen :0
Running SMT prover for 5 properties.
[2023-03-08 01:04:05] [INFO ] Invariant cache hit.
[2023-03-08 01:04:05] [INFO ] [Real]Absence check using 1 positive place invariants in 1 ms returned sat
[2023-03-08 01:04:05] [INFO ] [Real]Absence check using 1 positive and 1 generalized place invariants in 1 ms returned sat
[2023-03-08 01:04:05] [INFO ] After 86ms SMT Verify possible using all constraints in real domain returned unsat :5 sat :0
Fused 5 Parikh solutions to 0 different solutions.
Parikh walk visited 0 properties in 0 ms.
Successfully simplified 5 atomic propositions for a total of 3 simplifications.
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-00 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-05 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2023-03-08 01:04:05] [INFO ] Flatten gal took : 11 ms
[2023-03-08 01:04:05] [INFO ] Flatten gal took : 7 ms
[2023-03-08 01:04:05] [INFO ] Input system was already deterministic with 92 transitions.
Computed a total of 5 stabilizing places and 10 stable transitions
Graph (complete) has 243 edges and 73 vertex of which 72 are kept as prefixes of interest. Removing 1 places using SCC suffix rule.3 ms
Starting structural reductions in LTL mode, iteration 0 : 73/73 places, 92/92 transitions.
Discarding 6 places :
Symmetric choice reduction at 0 with 6 rule applications. Total rules 6 place count 67 transition count 82
Iterating global reduction 0 with 6 rules applied. Total rules applied 12 place count 67 transition count 82
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 13 place count 67 transition count 81
Discarding 2 places :
Symmetric choice reduction at 1 with 2 rule applications. Total rules 15 place count 65 transition count 79
Iterating global reduction 1 with 2 rules applied. Total rules applied 17 place count 65 transition count 79
Discarding 2 places :
Symmetric choice reduction at 1 with 2 rule applications. Total rules 19 place count 63 transition count 74
Iterating global reduction 1 with 2 rules applied. Total rules applied 21 place count 63 transition count 74
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 1 with 1 rules applied. Total rules applied 22 place count 63 transition count 73
Discarding 2 places :
Symmetric choice reduction at 2 with 2 rule applications. Total rules 24 place count 61 transition count 71
Iterating global reduction 2 with 2 rules applied. Total rules applied 26 place count 61 transition count 71
Discarding 2 places :
Symmetric choice reduction at 2 with 2 rule applications. Total rules 28 place count 59 transition count 69
Iterating global reduction 2 with 2 rules applied. Total rules applied 30 place count 59 transition count 69
Ensure Unique test removed 3 transitions
Reduce isomorphic transitions removed 3 transitions.
Iterating post reduction 2 with 3 rules applied. Total rules applied 33 place count 59 transition count 66
Applied a total of 33 rules in 12 ms. Remains 59 /73 variables (removed 14) and now considering 66/92 (removed 26) transitions.
// Phase 1: matrix 66 rows 59 cols
[2023-03-08 01:04:05] [INFO ] Computed 2 place invariants in 1 ms
[2023-03-08 01:04:06] [INFO ] Implicit Places using invariants in 59 ms returned []
[2023-03-08 01:04:06] [INFO ] Invariant cache hit.
[2023-03-08 01:04:06] [INFO ] State equation strengthened by 20 read => feed constraints.
[2023-03-08 01:04:06] [INFO ] Implicit Places using invariants and state equation in 75 ms returned []
Implicit Place search using SMT with State Equation took 136 ms to find 0 implicit places.
[2023-03-08 01:04:06] [INFO ] Invariant cache hit.
[2023-03-08 01:04:06] [INFO ] Dead Transitions using invariants and state equation in 50 ms found 0 transitions.
Starting structural reductions in LTL mode, iteration 1 : 59/73 places, 66/92 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 200 ms. Remains : 59/73 places, 66/92 transitions.
[2023-03-08 01:04:06] [INFO ] Flatten gal took : 4 ms
[2023-03-08 01:04:06] [INFO ] Flatten gal took : 4 ms
[2023-03-08 01:04:06] [INFO ] Input system was already deterministic with 66 transitions.
[2023-03-08 01:04:06] [INFO ] Flatten gal took : 4 ms
[2023-03-08 01:04:06] [INFO ] Flatten gal took : 3 ms
[2023-03-08 01:04:06] [INFO ] Time to serialize gal into /tmp/CTLCardinality54596284511674628.gal : 1 ms
[2023-03-08 01:04:06] [INFO ] Time to serialize properties into /tmp/CTLCardinality18242244318949013546.ctl : 72 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-ctl-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/CTLCardinality54596284511674628.gal' '-t' 'CGAL' '-ctl' '/tmp/CTLCardinality18242244318949013546.ctl' '--gen-order' 'FOLLOW'

its-ctl command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202303021504/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -...282
No direction supplied, using forward translation only.
Parsed 1 CTL formulae.
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
reachable,20630,0.146042,9176,2,2968,5,23349,6,0,302,17505,0


Converting to forward existential form...Done !
original formula: EF(AX((p29>=1)))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !(EX(!((p29>=1)))))] != FALSE
Reverse transition relation is NOT exact ! Due to transitions t1, t5, t6, t9, t10, t28, t41, t46, t47, t48, t49, t50, t51, t52, t53, t54, t55, t56, t57, t5...291
(forward)formula 0,1,0.51019,22540,1,0,135,80248,149,55,2022,54927,139
FORMULA DBSingleClientW-PT-d0m05-CTLCardinality-14 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL
Formula is TRUE !

***************************************

[2023-03-08 01:04:06] [INFO ] Flatten gal took : 18 ms
[2023-03-08 01:04:06] [INFO ] Flatten gal took : 6 ms
Total runtime 2742 ms.

BK_STOP 1678237451696

--------------------
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
+ [[ CTLCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution CTLCardinality -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:
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
++ perl -pe 's/.*\.//g'
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination CTLCardinality -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="DBSingleClientW-PT-d0m05"
export BK_EXAMINATION="CTLCardinality"
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 DBSingleClientW-PT-d0m05, 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 r101-tall-167814475000185"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/DBSingleClientW-PT-d0m05.tgz
mv DBSingleClientW-PT-d0m05 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 '' CTLCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
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 ;