fond
Model Checking Contest 2023
13th edition, Paris, France, April 26, 2023 (at TOOLympics II)
Execution of r107-tall-167814484800918
Last Updated
May 14, 2023

About the Execution of Smart+red for DNAwalker-PT-06track28RL

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
334.008 69562.00 78867.00 462.10 TTTFTFFTTTFFTTTT 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.r107-tall-167814484800918.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 smartxred
Input is DNAwalker-PT-06track28RL, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r107-tall-167814484800918
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 556K
-rw-r--r-- 1 mcc users 6.3K Feb 25 13:02 CTLCardinality.txt
-rw-r--r-- 1 mcc users 68K Feb 25 13:02 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.0K Feb 25 13:01 CTLFireability.txt
-rw-r--r-- 1 mcc users 41K Feb 25 13:01 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.0K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.8K Feb 25 15:55 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K Feb 25 15:55 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K Feb 25 15:55 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Feb 25 15:55 LTLFireability.xml
-rw-r--r-- 1 mcc users 11K Feb 25 13:03 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 112K Feb 25 13:03 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 11K Feb 25 13:02 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 90K Feb 25 13:02 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Feb 25 15:55 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 15:55 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 12 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 108K 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 DNAwalker-PT-06track28RL-ReachabilityCardinality-00
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-01
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-02
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-03
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-04
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-05
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-06
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-07
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-08
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-09
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-10
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-11
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-12
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-13
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-14
FORMULA_NAME DNAwalker-PT-06track28RL-ReachabilityCardinality-15

=== Now, execution of the tool begins

BK_START 1678444171871

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=smartxred
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=DNAwalker-PT-06track28RL
Applying reductions before tool smart
Invoking reducer
Running Version 202303021504
[2023-03-10 10:29:33] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -timeout, 360, -rebuildPNML]
[2023-03-10 10:29:33] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-10 10:29:33] [INFO ] Load time of PNML (sax parser for PT used): 50 ms
[2023-03-10 10:29:33] [INFO ] Transformed 34 places.
[2023-03-10 10:29:33] [INFO ] Transformed 250 transitions.
[2023-03-10 10:29:33] [INFO ] Parsed PT model containing 34 places and 250 transitions and 728 arcs in 110 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 12 ms.
Working with output stream class java.io.PrintStream
Initial state reduction rules removed 3 formulas.
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-12 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-13 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 10000 steps, including 639 resets, run finished after 379 ms. (steps per millisecond=26 ) properties (out of 13) seen :8
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-14 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-11 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-08 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-07 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-03 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 58 resets, run finished after 57 ms. (steps per millisecond=175 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 59 resets, run finished after 54 ms. (steps per millisecond=185 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 63 resets, run finished after 69 ms. (steps per millisecond=144 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 61 resets, run finished after 42 ms. (steps per millisecond=238 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 51 resets, run finished after 54 ms. (steps per millisecond=185 ) properties (out of 5) seen :0
Running SMT prover for 5 properties.
[2023-03-10 10:29:34] [INFO ] Flow matrix only has 247 transitions (discarded 3 similar events)
// Phase 1: matrix 247 rows 34 cols
[2023-03-10 10:29:34] [INFO ] Computed 0 place invariants in 14 ms
[2023-03-10 10:29:34] [INFO ] After 151ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:5
[2023-03-10 10:29:53] [INFO ] After 19429ms SMT Verify possible using all constraints in natural domain returned unsat :3 sat :0
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-10 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-06 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-05 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 5 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 33 out of 34 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 34/34 places, 250/250 transitions.
Drop transitions removed 4 transitions
Reduce isomorphic transitions removed 4 transitions.
Iterating post reduction 0 with 4 rules applied. Total rules applied 4 place count 34 transition count 246
Applied a total of 4 rules in 17 ms. Remains 34 /34 variables (removed 0) and now considering 246/250 (removed 4) transitions.
// Phase 1: matrix 246 rows 34 cols
[2023-03-10 10:29:53] [INFO ] Computed 0 place invariants in 5 ms
[2023-03-10 10:29:53] [INFO ] Dead Transitions using invariants and state equation in 106 ms found 0 transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 125 ms. Remains : 34/34 places, 246/250 transitions.
Incomplete random walk after 10000 steps, including 635 resets, run finished after 150 ms. (steps per millisecond=66 ) properties (out of 2) seen :0
Incomplete Best-First random walk after 10001 steps, including 60 resets, run finished after 28 ms. (steps per millisecond=357 ) properties (out of 2) seen :0
Incomplete Best-First random walk after 10001 steps, including 59 resets, run finished after 24 ms. (steps per millisecond=416 ) properties (out of 2) seen :0
Interrupted probabilistic random walk after 1358687 steps, run timeout after 3001 ms. (steps per millisecond=452 ) properties seen :{}
Probabilistic random walk after 1358687 steps, saw 218795 distinct states, run finished after 3002 ms. (steps per millisecond=452 ) properties seen :0
Running SMT prover for 2 properties.
[2023-03-10 10:29:57] [INFO ] Invariant cache hit.
[2023-03-10 10:29:57] [INFO ] After 31ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:2
[2023-03-10 10:30:15] [INFO ] After 18141ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :0
Fused 2 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 33 out of 34 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 34/34 places, 246/246 transitions.
Applied a total of 0 rules in 12 ms. Remains 34 /34 variables (removed 0) and now considering 246/246 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 12 ms. Remains : 34/34 places, 246/246 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 34/34 places, 246/246 transitions.
Applied a total of 0 rules in 6 ms. Remains 34 /34 variables (removed 0) and now considering 246/246 (removed 0) transitions.
[2023-03-10 10:30:15] [INFO ] Invariant cache hit.
[2023-03-10 10:30:15] [INFO ] Implicit Places using invariants in 18 ms returned []
[2023-03-10 10:30:15] [INFO ] Invariant cache hit.
[2023-03-10 10:30:15] [INFO ] State equation strengthened by 53 read => feed constraints.
[2023-03-10 10:30:15] [INFO ] Implicit Places using invariants and state equation in 89 ms returned []
Implicit Place search using SMT with State Equation took 111 ms to find 0 implicit places.
[2023-03-10 10:30:15] [INFO ] Redundant transitions in 13 ms returned []
[2023-03-10 10:30:15] [INFO ] Invariant cache hit.
[2023-03-10 10:30:15] [INFO ] Dead Transitions using invariants and state equation in 108 ms found 0 transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 252 ms. Remains : 34/34 places, 246/246 transitions.
Applied a total of 0 rules in 5 ms. Remains 34 /34 variables (removed 0) and now considering 246/246 (removed 0) transitions.
Running SMT prover for 2 properties.
[2023-03-10 10:30:15] [INFO ] Invariant cache hit.
[2023-03-10 10:30:15] [INFO ] After 22ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:2
[2023-03-10 10:30:33] [INFO ] After 18132ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :0
[2023-03-10 10:30:33] [INFO ] Export to MCC of 2 properties in file /home/mcc/execution/ReachabilityCardinality.sr.xml took 5 ms.
[2023-03-10 10:30:33] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 34 places, 246 transitions and 720 arcs took 2 ms.
[2023-03-10 10:30:33] [INFO ] Flatten gal took : 39 ms
Total runtime 60681 ms.
There are residual formulas that ITS could not solve within timeout
======================================================
========== this is Smart for the MCC'2018 ============
======================================================
Running DNAwalker (PT), instance 06track28RL
Examination ReachabilityCardinality
Parser /home/mcc/BenchKit/bin//../reducer/bin//../../smart/bin//parser/Cardinality.jar
Model checker /home/mcc/BenchKit/bin//../reducer/bin//../../smart/bin//rem_exec//smart

GOT IT HERE. BS
Petri model created: 34 places, 246 transitions, 720 arcs.
Final Score: 578.26
Took : 6 seconds
Reachability Cardinality file is: ReachabilityCardinality.xml
READY TO PARSE. BS
PROPERTY: DNAwalker-PT-06track28RL-ReachabilityCardinality-00 (reachable &!potential( ( ( ( ( ( (tk(P23)) <= (tk(P30)) ) | (! ( (tk(P9)) <= (tk(P27)) )) ) | ( (! ( ( 2 ) <= (tk(P21)) )) | ( ( (tk(P23)) <= ( 1 ) ) | ( ( (! ( (tk(P10)) <= (tk(P16)) )) & (! ( (tk(P16)) <= (tk(P29)) )) ) & ( (! ( (tk(P17)) <= ( 1 ) )) & ( ( ( 1 ) <= (tk(P22)) ) & ( ( 2 ) <= (tk(P24)) ) ) ) ) ) ) ) & ( ( (! ( (tk(P15)) <= ( 1 ) )) & (! ( (tk(P30)) <= (tk(P4)) )) ) | ( ( (tk(P15)) <= ( 0 ) ) & ( (! ( (tk(P24)) <= ( 0 ) )) & ( (! ( (tk(P12)) <= (tk(P19)) )) | ( (! ( (tk(P1)) <= (tk(P9)) )) | ( ( 2 ) <= (tk(P18)) ) ) ) ) ) ) ) | ( ( ( (tk(P28)) <= (tk(P29)) ) | (! ( ( 2 ) <= (tk(P20)) )) ) & ( ( ( ( 1 ) <= (tk(P20)) ) | ( (tk(P14)) <= ( 2 ) ) ) | ( (! ( (tk(P24)) <= ( 1 ) )) | ( ( ( 1 ) <= (tk(P18)) ) | (! ( ( 1 ) <= (tk(P11)) )) ) ) ) ) )))
PROPERTY: DNAwalker-PT-06track28RL-ReachabilityCardinality-04 (reachable &!potential( ( ( ( ( ( 1 ) <= (tk(P13)) ) | ( ( 1 ) <= (tk(P6)) ) ) | ( ( (tk(P5)) <= ( 2 ) ) | ( ( (tk(P11)) <= (tk(P10)) ) & ( (! ( (tk(P6)) <= ( 1 ) )) & ( (! ( ( 1 ) <= (tk(P18)) )) | (! ( (tk(P3)) <= ( 0 ) )) ) ) ) ) ) | ( ( ( ( (! ( (tk(P33)) <= (tk(P3)) )) | ( (! ( ( 1 ) <= (tk(P33)) )) | (! ( ( 1 ) <= (tk(P34)) )) ) ) & ( ( (! ( (tk(P5)) <= ( 1 ) )) & ( ( (tk(P20)) <= ( 2 ) ) | ( (tk(P9)) <= (tk(P22)) ) ) ) | ( ( ( 1 ) <= (tk(P31)) ) & ( ( ( 1 ) <= (tk(P5)) ) & ( (tk(P28)) <= (tk(P2)) ) ) ) ) ) | ( (! ( (tk(P12)) <= ( 1 ) )) & ( ( (! ( (tk(P25)) <= ( 1 ) )) | (! ( (tk(P5)) <= (tk(P3)) )) ) & ( ( ( 1 ) <= (tk(P28)) ) | ( ( (tk(P28)) <= ( 0 ) ) | ( ( 2 ) <= (tk(P19)) ) ) ) ) ) ) | ( ( ( ( (tk(P11)) <= ( 1 ) ) & (! ( (tk(P26)) <= ( 1 ) )) ) & ( ( (tk(P7)) <= (tk(P8)) ) & ( (! ( (tk(P33)) <= (tk(P7)) )) & ( (! ( (tk(P7)) <= (tk(P29)) )) | ( ( 1 ) <= (tk(P19)) ) ) ) ) ) | ( ( (tk(P11)) <= ( 2 ) ) & (! ( (tk(P15)) <= (tk(P30)) )) ) ) ) )))
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-00 TRUE TECHNIQUES SEQUENTIAL_PROCESSING DECISION_DIAGRAMS
FORMULA DNAwalker-PT-06track28RL-ReachabilityCardinality-04 TRUE TECHNIQUES SEQUENTIAL_PROCESSING DECISION_DIAGRAMS

BK_STOP 1678444241433

--------------------
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 ReachabilityCardinality -timeout 360 -rebuildPNML

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="DNAwalker-PT-06track28RL"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="smartxred"
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 smartxred"
echo " Input is DNAwalker-PT-06track28RL, 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 r107-tall-167814484800918"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/DNAwalker-PT-06track28RL.tgz
mv DNAwalker-PT-06track28RL 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 ;