Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2021-input.r292-tall-162124156100215.qcow2', fmt=qcow2 size=4294967296 backing_file='/data/fkordon/mcc2021-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
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=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is GPUForwardProgress-PT-32a, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r292-tall-162124156100215
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 416K
-rw-r--r-- 1 mcc users 13K May 15 08:57 CTLCardinality.txt
-rw-r--r-- 1 mcc users 122K May 15 08:57 CTLCardinality.xml
-rw-r--r-- 1 mcc users 11K May 15 08:57 CTLFireability.txt
-rw-r--r-- 1 mcc users 104K May 15 08:57 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.1K May 12 07:57 LTLCardinality.txt
-rw-r--r-- 1 mcc users 22K May 12 07:57 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.0K May 12 07:57 LTLFireability.txt
-rw-r--r-- 1 mcc users 15K May 12 07:57 LTLFireability.xml
-rw-r--r-- 1 mcc users 1 May 12 08:13 NewModel
-rw-r--r-- 1 mcc users 3.0K May 11 18:31 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 18K May 11 18:31 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 2.4K May 11 15:43 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 19K May 11 15:43 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.3K May 12 04:40 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.4K May 12 04:40 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 12 08:13 equiv_col
-rw-r--r-- 1 mcc users 4 May 12 08:13 instance
-rw-r--r-- 1 mcc users 6 May 12 08:13 iscolored
-rw-r--r-- 1 mcc users 38K May 12 08:13 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 net-ReachabilityFireability-00
FORMULA_NAME net-ReachabilityFireability-01
FORMULA_NAME net-ReachabilityFireability-02
FORMULA_NAME net-ReachabilityFireability-03
FORMULA_NAME net-ReachabilityFireability-04
FORMULA_NAME net-ReachabilityFireability-05
FORMULA_NAME net-ReachabilityFireability-06
FORMULA_NAME net-ReachabilityFireability-07
FORMULA_NAME net-ReachabilityFireability-08
FORMULA_NAME net-ReachabilityFireability-09
FORMULA_NAME net-ReachabilityFireability-10
FORMULA_NAME net-ReachabilityFireability-11
FORMULA_NAME net-ReachabilityFireability-12
FORMULA_NAME net-ReachabilityFireability-13
FORMULA_NAME net-ReachabilityFireability-14
FORMULA_NAME net-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1621276208115

Running Version 0
[2021-05-17 18:30:09] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -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, 3600]
[2021-05-17 18:30:09] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2021-05-17 18:30:09] [INFO ] Load time of PNML (sax parser for PT used): 44 ms
[2021-05-17 18:30:09] [INFO ] Transformed 136 places.
[2021-05-17 18:30:09] [INFO ] Transformed 169 transitions.
[2021-05-17 18:30:09] [INFO ] Found NUPN structural information;
[2021-05-17 18:30:09] [INFO ] Parsed PT model containing 136 places and 169 transitions in 86 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 9 ms.
Working with output stream class java.io.PrintStream
Ensure Unique test removed 34 transitions
Reduce redundant transitions removed 34 transitions.
Incomplete random walk after 10000 steps, including 9 resets, run finished after 101 ms. (steps per millisecond=99 ) properties (out of 16) seen :3
FORMULA net-ReachabilityFireability-08 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA net-ReachabilityFireability-04 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA net-ReachabilityFireability-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 38 ms. (steps per millisecond=263 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 42 resets, run finished after 62 ms. (steps per millisecond=161 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 13 ms. (steps per millisecond=769 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 17 ms. (steps per millisecond=588 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 14 ms. (steps per millisecond=714 ) properties (out of 13) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 17 ms. (steps per millisecond=588 ) properties (out of 13) seen :1
FORMULA net-ReachabilityFireability-07 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 17 ms. (steps per millisecond=588 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 38 ms. (steps per millisecond=263 ) properties (out of 12) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 28 ms. (steps per millisecond=357 ) properties (out of 12) seen :2
FORMULA net-ReachabilityFireability-11 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA net-ReachabilityFireability-00 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 44 ms. (steps per millisecond=227 ) properties (out of 10) seen :1
FORMULA net-ReachabilityFireability-13 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 22 resets, run finished after 33 ms. (steps per millisecond=303 ) properties (out of 9) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 15 ms. (steps per millisecond=666 ) properties (out of 9) seen :0
Running SMT prover for 9 properties.
// Phase 1: matrix 135 rows 136 cols
[2021-05-17 18:30:10] [INFO ] Computed 34 place invariants in 16 ms
[2021-05-17 18:30:10] [INFO ] [Real]Absence check using 0 positive and 34 generalized place invariants in 17 ms returned sat
[2021-05-17 18:30:10] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:10] [INFO ] [Real]Absence check using state equation in 23 ms returned unsat
[2021-05-17 18:30:10] [INFO ] [Real]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:10] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:10] [INFO ] [Real]Absence check using state equation in 21 ms returned unsat
[2021-05-17 18:30:10] [INFO ] [Real]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:10] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:10] [INFO ] [Real]Absence check using state equation in 43 ms returned sat
[2021-05-17 18:30:10] [INFO ] Solution in real domain found non-integer solution.
[2021-05-17 18:30:10] [INFO ] [Nat]Absence check using 0 positive and 34 generalized place invariants in 8 ms returned sat
[2021-05-17 18:30:10] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:10] [INFO ] [Nat]Absence check using state equation in 38 ms returned sat
[2021-05-17 18:30:10] [INFO ] State equation strengthened by 33 read => feed constraints.
[2021-05-17 18:30:10] [INFO ] [Nat]Added 33 Read/Feed constraints in 8 ms returned sat
[2021-05-17 18:30:10] [INFO ] Computed and/alt/rep : 128/480/128 causal constraints (skipped 6 transitions) in 24 ms.
[2021-05-17 18:30:11] [INFO ] Added : 100 causal constraints over 20 iterations in 283 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 4 ms.
[2021-05-17 18:30:11] [INFO ] [Real]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:11] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:11] [INFO ] [Real]Absence check using state equation in 38 ms returned sat
[2021-05-17 18:30:11] [INFO ] [Real]Added 33 Read/Feed constraints in 11 ms returned sat
[2021-05-17 18:30:11] [INFO ] Solution in real domain found non-integer solution.
[2021-05-17 18:30:11] [INFO ] [Nat]Absence check using 0 positive and 34 generalized place invariants in 8 ms returned sat
[2021-05-17 18:30:11] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:11] [INFO ] [Nat]Absence check using state equation in 40 ms returned sat
[2021-05-17 18:30:11] [INFO ] [Nat]Added 33 Read/Feed constraints in 6 ms returned sat
[2021-05-17 18:30:11] [INFO ] Computed and/alt/rep : 128/480/128 causal constraints (skipped 6 transitions) in 13 ms.
[2021-05-17 18:30:11] [INFO ] Added : 113 causal constraints over 24 iterations in 280 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 4 ms.
[2021-05-17 18:30:11] [INFO ] [Real]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:11] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:11] [INFO ] [Real]Absence check using state equation in 36 ms returned sat
[2021-05-17 18:30:11] [INFO ] Solution in real domain found non-integer solution.
[2021-05-17 18:30:11] [INFO ] [Nat]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:11] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:11] [INFO ] [Nat]Absence check using state equation in 40 ms returned sat
[2021-05-17 18:30:11] [INFO ] [Nat]Added 33 Read/Feed constraints in 6 ms returned sat
[2021-05-17 18:30:11] [INFO ] Computed and/alt/rep : 128/480/128 causal constraints (skipped 6 transitions) in 16 ms.
[2021-05-17 18:30:12] [INFO ] Added : 87 causal constraints over 18 iterations in 287 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 3 ms.
[2021-05-17 18:30:12] [INFO ] [Real]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:12] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:12] [INFO ] [Real]Absence check using state equation in 37 ms returned sat
[2021-05-17 18:30:12] [INFO ] Solution in real domain found non-integer solution.
[2021-05-17 18:30:12] [INFO ] [Nat]Absence check using 0 positive and 34 generalized place invariants in 6 ms returned sat
[2021-05-17 18:30:12] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:12] [INFO ] [Nat]Absence check using state equation in 31 ms returned sat
[2021-05-17 18:30:12] [INFO ] [Nat]Added 33 Read/Feed constraints in 7 ms returned sat
[2021-05-17 18:30:12] [INFO ] Computed and/alt/rep : 128/480/128 causal constraints (skipped 6 transitions) in 13 ms.
[2021-05-17 18:30:12] [INFO ] Added : 114 causal constraints over 24 iterations in 257 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 4 ms.
[2021-05-17 18:30:12] [INFO ] [Real]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:12] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:12] [INFO ] [Real]Absence check using state equation in 42 ms returned sat
[2021-05-17 18:30:12] [INFO ] Solution in real domain found non-integer solution.
[2021-05-17 18:30:12] [INFO ] [Nat]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:12] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:12] [INFO ] [Nat]Absence check using state equation in 37 ms returned sat
[2021-05-17 18:30:12] [INFO ] [Nat]Added 33 Read/Feed constraints in 6 ms returned sat
[2021-05-17 18:30:12] [INFO ] Computed and/alt/rep : 128/480/128 causal constraints (skipped 6 transitions) in 11 ms.
[2021-05-17 18:30:12] [INFO ] Added : 121 causal constraints over 25 iterations in 283 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 4 ms.
[2021-05-17 18:30:12] [INFO ] [Real]Absence check using 0 positive and 34 generalized place invariants in 12 ms returned sat
[2021-05-17 18:30:12] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:12] [INFO ] [Real]Absence check using state equation in 14 ms returned unsat
[2021-05-17 18:30:12] [INFO ] [Real]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:12] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:13] [INFO ] [Real]Absence check using state equation in 32 ms returned sat
[2021-05-17 18:30:13] [INFO ] [Real]Added 33 Read/Feed constraints in 12 ms returned sat
[2021-05-17 18:30:13] [INFO ] Solution in real domain found non-integer solution.
[2021-05-17 18:30:13] [INFO ] [Nat]Absence check using 0 positive and 34 generalized place invariants in 7 ms returned sat
[2021-05-17 18:30:13] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-17 18:30:13] [INFO ] [Nat]Absence check using state equation in 32 ms returned sat
[2021-05-17 18:30:13] [INFO ] [Nat]Added 33 Read/Feed constraints in 5 ms returned sat
[2021-05-17 18:30:13] [INFO ] Computed and/alt/rep : 128/480/128 causal constraints (skipped 6 transitions) in 10 ms.
[2021-05-17 18:30:13] [INFO ] Added : 94 causal constraints over 19 iterations in 275 ms. Result :sat
Attempting to minimize the solution found.
Minimization took 3 ms.
FORMULA net-ReachabilityFireability-14 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA net-ReachabilityFireability-02 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA net-ReachabilityFireability-01 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 9 Parikh solutions to 6 different solutions.
Incomplete Parikh walk after 3900 steps, including 106 resets, run finished after 26 ms. (steps per millisecond=150 ) properties (out of 6) seen :1 could not realise parikh vector
FORMULA net-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Incomplete Parikh walk after 5900 steps, including 105 resets, run finished after 33 ms. (steps per millisecond=178 ) properties (out of 5) seen :1 could not realise parikh vector
FORMULA net-ReachabilityFireability-06 TRUE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Incomplete Parikh walk after 8900 steps, including 107 resets, run finished after 51 ms. (steps per millisecond=174 ) properties (out of 4) seen :2 could not realise parikh vector
FORMULA net-ReachabilityFireability-12 TRUE TECHNIQUES TOPOLOGICAL PARIKH_WALK
FORMULA net-ReachabilityFireability-09 FALSE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Incomplete Parikh walk after 8500 steps, including 108 resets, run finished after 41 ms. (steps per millisecond=207 ) properties (out of 2) seen :1 could not realise parikh vector
FORMULA net-ReachabilityFireability-10 FALSE TECHNIQUES TOPOLOGICAL PARIKH_WALK
Incomplete Parikh walk after 8600 steps, including 106 resets, run finished after 40 ms. (steps per millisecond=215 ) properties (out of 1) seen :0 could not realise parikh vector
Finished Parikh walk after 73 steps, including 0 resets, run visited all 1 properties in 2 ms. (steps per millisecond=36 )
FORMULA net-ReachabilityFireability-15 TRUE TECHNIQUES TOPOLOGICAL PARIKH_WALK
All properties solved without resorting to model-checking.

BK_STOP 1621276214729

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

+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution ReachabilityFireability -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ cut -d . -f 9
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202104292328.jar
+ VERSION=0
+ echo 'Running Version 0'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination ReachabilityFireability -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 3600 -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss128m -Xms40m -Xmx16000m

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="GPUForwardProgress-PT-32a"
export BK_EXAMINATION="ReachabilityFireability"
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 2-4028"
echo " Executing tool itstools"
echo " Input is GPUForwardProgress-PT-32a, examination is ReachabilityFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r292-tall-162124156100215"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/GPUForwardProgress-PT-32a.tgz
mv GPUForwardProgress-PT-32a execution
cd execution
if [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "UpperBounds" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] || [ "ReachabilityFireability" = "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 [ "ReachabilityFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityFireability" != "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 "ReachabilityFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityFireability.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 '' ReachabilityFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityFireability"
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 ;