fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r119-tall-167814497600381
Last Updated
May 14, 2023

About the Execution of LTSMin+red for DLCflexbar-PT-8b

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
5363.712 1800000.00 1865681.00 4666.50 [undef] Time out reached

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.r119-tall-167814497600381.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 ltsminxred
Input is DLCflexbar-PT-8b, examination is ReachabilityDeadlock
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r119-tall-167814497600381
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 20M
-rw-r--r-- 1 mcc users 7.6K Feb 25 14:57 CTLCardinality.txt
-rw-r--r-- 1 mcc users 81K Feb 25 14:57 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.1K Feb 25 14:56 CTLFireability.txt
-rw-r--r-- 1 mcc users 55K Feb 25 14:56 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.9K Feb 25 15:52 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K Feb 25 15:52 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K Feb 25 15:52 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Feb 25 15:52 LTLFireability.xml
-rw-r--r-- 1 mcc users 8.1K Feb 25 15:00 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 77K Feb 25 15:00 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 9.2K Feb 25 14:58 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 76K Feb 25 14:58 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 15:52 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 15:52 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 3 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 20M 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

FORMULA_NAME ReachabilityDeadlock

=== Now, execution of the tool begins

BK_START 1679415509070

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=ltsminxred
BK_EXAMINATION=ReachabilityDeadlock
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=1800
BK_INPUT=DLCflexbar-PT-8b
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-21 16:18:30] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityDeadlock, -timeout, 180, -rebuildPNML]
[2023-03-21 16:18:30] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-21 16:18:31] [INFO ] Load time of PNML (sax parser for PT used): 1060 ms
[2023-03-21 16:18:33] [INFO ] Transformed 47560 places.
[2023-03-21 16:18:33] [INFO ] Transformed 76160 transitions.
[2023-03-21 16:18:33] [INFO ] Found NUPN structural information;
[2023-03-21 16:18:36] [INFO ] Parsed PT model containing 47560 places and 76160 transitions and 216499 arcs in 5995 ms.
Parsed 1 properties from file /home/mcc/execution/ReachabilityDeadlock.xml in 2 ms.
Working with output stream class java.io.PrintStream
Built sparse matrix representations for Structural reductions in 29 ms.1299282KB memory used
Starting structural reductions in DEADLOCK mode, iteration 0 : 47560/47560 places, 76160/76160 transitions.
Graph (trivial) has 42551 edges and 47560 vertex of which 2800 / 47560 are part of one of the 180 SCC in 89 ms
Free SCC test removed 2620 places
Ensure Unique test removed 2780 transitions
Reduce isomorphic transitions removed 2780 transitions.
Computed a total of 13150 stabilizing places and 13150 stable transitions
Computed a total of 13150 stabilizing places and 13150 stable transitions
Drop transitions removed 20711 transitions
Trivial Post-agglo rules discarded 20711 transitions
Performed 20711 trivial Post agglomeration. Transition count delta: 20711
Iterating post reduction 0 with 20711 rules applied. Total rules applied 20712 place count 44940 transition count 52669
Reduce places removed 20711 places and 0 transitions.
Ensure Unique test removed 450 transitions
Reduce isomorphic transitions removed 450 transitions.
Computed a total of 6079 stabilizing places and 6079 stable transitions
Drop transitions removed 440 transitions
Trivial Post-agglo rules discarded 440 transitions
Performed 440 trivial Post agglomeration. Transition count delta: 440
Iterating post reduction 1 with 21601 rules applied. Total rules applied 42313 place count 24229 transition count 51779
Reduce places removed 440 places and 0 transitions.
Ensure Unique test removed 140 transitions
Reduce isomorphic transitions removed 140 transitions.
Computed a total of 6079 stabilizing places and 6079 stable transitions
Drop transitions removed 140 transitions
Trivial Post-agglo rules discarded 140 transitions
Performed 140 trivial Post agglomeration. Transition count delta: 140
Iterating post reduction 2 with 720 rules applied. Total rules applied 43033 place count 23789 transition count 51499
Reduce places removed 140 places and 0 transitions.
Computed a total of 6079 stabilizing places and 6079 stable transitions
Iterating post reduction 3 with 140 rules applied. Total rules applied 43173 place count 23649 transition count 51499
Computed a total of 6079 stabilizing places and 6079 stable transitions
Performed 140 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 4 with 140 Pre rules applied. Total rules applied 43173 place count 23649 transition count 51359
Deduced a syphon composed of 140 places in 4495 ms
Reduce places removed 140 places and 0 transitions.
Iterating global reduction 4 with 280 rules applied. Total rules applied 43453 place count 23509 transition count 51359
Computed a total of 6079 stabilizing places and 6079 stable transitions
Performed 13138 Post agglomeration using F-continuation condition.Transition count delta: 13138
Deduced a syphon composed of 13138 places in 19 ms
Reduce places removed 13138 places and 0 transitions.
Iterating global reduction 4 with 26276 rules applied. Total rules applied 69729 place count 10371 transition count 38221
Computed a total of 1 stabilizing places and 1 stable transitions
Renaming transitions due to excessive name length > 1024 char.
Discarding 350 places :
Symmetric choice reduction at 4 with 350 rule applications. Total rules 70079 place count 10021 transition count 24991
Iterating global reduction 4 with 350 rules applied. Total rules applied 70429 place count 10021 transition count 24991
Ensure Unique test removed 320 transitions
Reduce isomorphic transitions removed 320 transitions.
Computed a total of 1 stabilizing places and 1 stable transitions
Iterating post reduction 4 with 320 rules applied. Total rules applied 70749 place count 10021 transition count 24671
Computed a total of 1 stabilizing places and 1 stable transitions
Performed 101 Post agglomeration using F-continuation condition.Transition count delta: -909
Deduced a syphon composed of 101 places in 27 ms
Reduce places removed 101 places and 0 transitions.
Iterating global reduction 5 with 202 rules applied. Total rules applied 70951 place count 9920 transition count 25580
Ensure Unique test removed 50 transitions
Reduce isomorphic transitions removed 50 transitions.
Computed a total of 1 stabilizing places and 1 stable transitions
Iterating post reduction 5 with 50 rules applied. Total rules applied 71001 place count 9920 transition count 25530
Computed a total of 1 stabilizing places and 1 stable transitions
Discarding 50 places :
Symmetric choice reduction at 6 with 50 rule applications. Total rules 71051 place count 9870 transition count 24530
Iterating global reduction 6 with 50 rules applied. Total rules applied 71101 place count 9870 transition count 24530
Ensure Unique test removed 50 transitions
Reduce isomorphic transitions removed 50 transitions.
Computed a total of 1 stabilizing places and 1 stable transitions
Iterating post reduction 6 with 50 rules applied. Total rules applied 71151 place count 9870 transition count 24480
Computed a total of 1 stabilizing places and 1 stable transitions
Performed 101 Post agglomeration using F-continuation condition.Transition count delta: -859
Deduced a syphon composed of 101 places in 8 ms
Reduce places removed 101 places and 0 transitions.
Iterating global reduction 7 with 202 rules applied. Total rules applied 71353 place count 9769 transition count 25339
Ensure Unique test removed 26 transitions
Reduce isomorphic transitions removed 26 transitions.
Computed a total of 1 stabilizing places and 1 stable transitions
Iterating post reduction 7 with 26 rules applied. Total rules applied 71379 place count 9769 transition count 25313
Computed a total of 1 stabilizing places and 1 stable transitions
Discarding 26 places :
Symmetric choice reduction at 8 with 26 rule applications. Total rules 71405 place count 9743 transition count 24793
Iterating global reduction 8 with 26 rules applied. Total rules applied 71431 place count 9743 transition count 24793
Ensure Unique test removed 26 transitions
Reduce isomorphic transitions removed 26 transitions.
Computed a total of 1 stabilizing places and 1 stable transitions
Iterating post reduction 8 with 26 rules applied. Total rules applied 71457 place count 9743 transition count 24767
Computed a total of 1 stabilizing places and 1 stable transitions
Performed 101 Post agglomeration using F-continuation condition.Transition count delta: -883
Deduced a syphon composed of 101 places in 5 ms
Reduce places removed 101 places and 0 transitions.
Iterating global reduction 9 with 202 rules applied. Total rules applied 71659 place count 9642 transition count 25650
Ensure Unique test removed 37 transitions
Reduce isomorphic transitions removed 37 transitions.
Computed a total of 1 stabilizing places and 1 stable transitions
Iterating post reduction 9 with 37 rules applied. Total rules applied 71696 place count 9642 transition count 25613
Computed a total of 1 stabilizing places and 1 stable transitions
Discarding 37 places :
Symmetric choice reduction at 10 with 37 rule applications. Total rules 71733 place count 9605 transition count 24873
Iterating global reduction 10 with 37 rules applied. Total rules applied 71770 place count 9605 transition count 24873
Ensure Unique test removed 37 transitions
Reduce isomorphic transitions removed 37 transitions.
Computed a total of 1 stabilizing places and 1 stable transitions
Iterating post reduction 10 with 37 rules applied. Total rules applied 71807 place count 9605 transition count 24836
Computed a total of 1 stabilizing places and 1 stable transitions
Performed 94 Post agglomeration using F-continuation condition.Transition count delta: -803
Deduced a syphon composed of 94 places in 5 ms
Reduce places removed 94 places and 0 transitions.
Iterating global reduction 11 with 188 rules applied. Total rules applied 71995 place count 9511 transition count 25639
Ensure Unique test removed 27 transitions
Reduce isomorphic transitions removed 27 transitions.
Computed a total of 1 stabilizing places and 16 stable transitions
Iterating post reduction 11 with 27 rules applied. Total rules applied 72022 place count 9511 transition count 25612
Computed a total of 1 stabilizing places and 16 stable transitions
Discarding 27 places :
Symmetric choice reduction at 12 with 27 rule applications. Total rules 72049 place count 9484 transition count 25072
Iterating global reduction 12 with 27 rules applied. Total rules applied 72076 place count 9484 transition count 25072
Ensure Unique test removed 27 transitions
Reduce isomorphic transitions removed 27 transitions.
Computed a total of 1 stabilizing places and 16 stable transitions
Iterating post reduction 12 with 27 rules applied. Total rules applied 72103 place count 9484 transition count 25045
Computed a total of 1 stabilizing places and 16 stable transitions
Performed 27 Post agglomeration using F-continuation condition.Transition count delta: -216
Deduced a syphon composed of 27 places in 4 ms
Reduce places removed 27 places and 0 transitions.
Iterating global reduction 13 with 54 rules applied. Total rules applied 72157 place count 9457 transition count 25261
Computed a total of 1 stabilizing places and 16 stable transitions
Computed a total of 1 stabilizing places and 16 stable transitions
Applied a total of 72157 rules in 109628 ms. Remains 9457 /47560 variables (removed 38103) and now considering 25261/76160 (removed 50899) transitions.
Finished structural reductions in DEADLOCK mode , in 1 iterations and 109633 ms. Remains : 9457/47560 places, 25261/76160 transitions.
Interrupted Random walk after 391772 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=13 )
[2023-03-21 16:21:08] [INFO ] Flow matrix only has 25073 transitions (discarded 188 similar events)
// Phase 1: matrix 25073 rows 9457 cols
[2023-03-21 16:21:08] [INFO ] Computed 3040 place invariants in 122 ms
[2023-03-21 16:21:37] [INFO ] [Real]Absence check using 3040 positive place invariants in 14509 ms returned sat
[2023-03-21 16:21:37] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-21 16:23:49] [INFO ] [Real]Absence check using state equation in 131819 ms returned sat
[2023-03-21 16:23:49] [INFO ] Solution in real domain found non-integer solution.
[2023-03-21 16:24:18] [INFO ] [Nat]Absence check using 3040 positive place invariants in 14340 ms returned sat
[2023-03-21 16:24:18] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-21 16:26:32] [INFO ] [Nat]Absence check using state equation in 133324 ms returned sat
[2023-03-21 16:26:32] [INFO ] State equation strengthened by 4305 read => feed constraints.
[2023-03-21 16:26:33] [INFO ] [Nat]Added 4305 Read/Feed constraints in 1246 ms returned sat
[2023-03-21 16:26:35] [INFO ] Computed and/alt/rep : 13037/30541/13037 causal constraints (skipped 12020 transitions) in 1498 ms.
Interrupted Random directed walk after 55935 steps, including 0 resets, run timeout after 32205 ms. (steps per millisecond=1 )
Interrupted Random walk after 394968 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=13 )
Interrupted Random directed walk after 55928 steps, including 0 resets, run timeout after 32347 ms. (steps per millisecond=1 )
Interrupted Random walk after 398803 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=13 )
Starting structural reductions in DEADLOCK mode, iteration 0 : 9457/9457 places, 25261/25261 transitions.
Computed a total of 1 stabilizing places and 16 stable transitions
Computed a total of 1 stabilizing places and 16 stable transitions
Computed a total of 1 stabilizing places and 16 stable transitions
Applied a total of 0 rules in 2159 ms. Remains 9457 /9457 variables (removed 0) and now considering 25261/25261 (removed 0) transitions.
[2023-03-21 16:28:42] [INFO ] Flow matrix only has 25073 transitions (discarded 188 similar events)
[2023-03-21 16:28:42] [INFO ] Invariant cache hit.
[2023-03-21 16:28:43] [INFO ] Implicit Places using invariants in 843 ms returned []
Implicit Place search using SMT only with invariants took 852 ms to find 0 implicit places.
[2023-03-21 16:28:43] [INFO ] Flow matrix only has 25073 transitions (discarded 188 similar events)
[2023-03-21 16:28:43] [INFO ] Invariant cache hit.
[2023-03-21 16:28:44] [INFO ] Dead Transitions using invariants and state equation in 773 ms found 0 transitions.
Finished structural reductions in DEADLOCK mode , in 1 iterations and 3789 ms. Remains : 9457/9457 places, 25261/25261 transitions.
Interrupted Random walk after 389795 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=12 )
[2023-03-21 16:29:14] [INFO ] Flow matrix only has 25073 transitions (discarded 188 similar events)
[2023-03-21 16:29:14] [INFO ] Invariant cache hit.
[2023-03-21 16:29:38] [INFO ] [Real]Absence check using 3040 positive place invariants in 11334 ms returned sat
[2023-03-21 16:29:38] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-21 16:31:48] [INFO ] [Real]Absence check using state equation in 130210 ms returned sat
[2023-03-21 16:31:49] [INFO ] Solution in real domain found non-integer solution.
[2023-03-21 16:32:15] [INFO ] [Nat]Absence check using 3040 positive place invariants in 13040 ms returned sat
[2023-03-21 16:32:15] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-21 16:34:33] [INFO ] [Nat]Absence check using state equation in 137684 ms returned sat
[2023-03-21 16:34:33] [INFO ] State equation strengthened by 4305 read => feed constraints.
[2023-03-21 16:34:34] [INFO ] [Nat]Added 4305 Read/Feed constraints in 1371 ms returned sat
[2023-03-21 16:34:36] [INFO ] Computed and/alt/rep : 13037/30541/13037 causal constraints (skipped 12020 transitions) in 1322 ms.
Interrupted Random directed walk after 55976 steps, including 0 resets, run timeout after 32238 ms. (steps per millisecond=1 )
Interrupted Random walk after 391291 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=13 )
Interrupted Random directed walk after 55971 steps, including 0 resets, run timeout after 32187 ms. (steps per millisecond=1 )
Interrupted Random walk after 393056 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=13 )
[2023-03-21 16:36:43] [INFO ] Flatten gal took : 1986 ms
[2023-03-21 16:36:43] [INFO ] Export to MCC of 1 properties in file /home/mcc/execution/ReachabilityDeadlock.sr.xml took 1 ms.
[2023-03-21 16:36:44] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 47560 places, 76160 transitions and 216499 arcs took 183 ms.
Total runtime 1093587 ms.
There are residual formulas that ITS could not solve within timeout
TIME LIMIT: Killed by timeout after 1800 seconds
MemTotal: 16393216 kB
MemFree: 10733232 kB
After kill :
MemTotal: 16393216 kB
MemFree: 16049324 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 ReachabilityDeadlock -timeout 180 -rebuildPNML
mcc2023

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="DLCflexbar-PT-8b"
export BK_EXAMINATION="ReachabilityDeadlock"
export BK_TOOL="ltsminxred"
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 2-5348"
echo " Executing tool ltsminxred"
echo " Input is DLCflexbar-PT-8b, examination is ReachabilityDeadlock"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r119-tall-167814497600381"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/DLCflexbar-PT-8b.tgz
mv DLCflexbar-PT-8b execution
cd execution
if [ "ReachabilityDeadlock" = "ReachabilityDeadlock" ] || [ "ReachabilityDeadlock" = "UpperBounds" ] || [ "ReachabilityDeadlock" = "QuasiLiveness" ] || [ "ReachabilityDeadlock" = "StableMarking" ] || [ "ReachabilityDeadlock" = "Liveness" ] || [ "ReachabilityDeadlock" = "OneSafe" ] || [ "ReachabilityDeadlock" = "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 [ "ReachabilityDeadlock" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityDeadlock" != "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 "ReachabilityDeadlock.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityDeadlock.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityDeadlock.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 '' ReachabilityDeadlock.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityDeadlock" = "ReachabilityDeadlock" ] || [ "ReachabilityDeadlock" = "QuasiLiveness" ] || [ "ReachabilityDeadlock" = "StableMarking" ] || [ "ReachabilityDeadlock" = "Liveness" ] || [ "ReachabilityDeadlock" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityDeadlock"
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 ;