fond
Model Checking Contest 2025
15th edition, Paris, France, June 24, 2025
Execution of r032-smll-174853815800237
Last Updated
June 24, 2025

About the Execution of Tapaal for CANConstruction-PT-090

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15684.620 109952.00 409042.00 103.90 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 normal

Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2025-input.r032-smll-174853815800237.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2025-input.qcow2 backing_fmt=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 2-5832
Executing tool tapaal
Input is CANConstruction-PT-090, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r032-smll-174853815800237
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 13M
-rw-r--r-- 1 mcc users 8.3K May 29 14:47 CTLCardinality.txt
-rw-r--r-- 1 mcc users 70K May 29 14:47 CTLCardinality.xml
-rw-r--r-- 1 mcc users 7.1K May 29 14:47 CTLFireability.txt
-rw-r--r-- 1 mcc users 53K May 29 14:47 CTLFireability.xml
-rw-r--r-- 1 mcc users 5.0K May 29 14:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 28K May 29 14:47 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.1K May 29 14:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 20K May 29 14:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 8.5K May 29 14:47 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 57K May 29 14:47 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 15K May 29 14:47 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 101K May 29 14:47 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K May 29 14:47 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.0K May 29 14:47 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 29 14:32 equiv_col
-rw-r--r-- 1 mcc users 4 May 29 14:32 instance
-rw-r--r-- 1 mcc users 6 May 29 14:32 iscolored
-rw-r--r-- 1 mcc users 12M May 29 14:32 model.pnml

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

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

The expected result is a vector of positive values
NUM_VECTOR

echo here is the order used to build the result vector(from xml file)
FORMULA_NAME CANConstruction-PT-090-UpperBounds-00
FORMULA_NAME CANConstruction-PT-090-UpperBounds-01
FORMULA_NAME CANConstruction-PT-090-UpperBounds-02
FORMULA_NAME CANConstruction-PT-090-UpperBounds-03
FORMULA_NAME CANConstruction-PT-090-UpperBounds-04
FORMULA_NAME CANConstruction-PT-090-UpperBounds-05
FORMULA_NAME CANConstruction-PT-090-UpperBounds-06
FORMULA_NAME CANConstruction-PT-090-UpperBounds-07
FORMULA_NAME CANConstruction-PT-090-UpperBounds-08
FORMULA_NAME CANConstruction-PT-090-UpperBounds-09
FORMULA_NAME CANConstruction-PT-090-UpperBounds-10
FORMULA_NAME CANConstruction-PT-090-UpperBounds-11
FORMULA_NAME CANConstruction-PT-090-UpperBounds-12
FORMULA_NAME CANConstruction-PT-090-UpperBounds-13
FORMULA_NAME CANConstruction-PT-090-UpperBounds-14
FORMULA_NAME CANConstruction-PT-090-UpperBounds-15

=== Now, execution of the tool begins

BK_START 1748714056843

tapaal
Got BK_BIN_PATH=/home/mcc/BenchKit/bin/
---> tapaal --- TAPAAL 2025-v2
Setting MODEL_PATH=.
Setting VERIFYPN=/home/mcc/BenchKit/bin/verifypn
Got BK_TIME_CONFINEMENT=3600
Setting TEMPDIR=/home/mcc/BenchKit/bin/tmp
Got BK_MEMORY_CONFINEMENT=16384
Limiting to 16265216 kB
Total timeout: 3590
Time left: 3590

*****************************************
* TAPAAL CLASSIC verifying UpperBounds *
*****************************************
TEMPDIR=/home/mcc/BenchKit/bin/tmp
QF=/home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi
MF=/home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX
Time left: 3590
---------------------------------------------------
Step -1: Stripping Colors
---------------------------------------------------
Verifying stripped models (16 in total)

Time left: 3589
---------------------------------------------------
Step 0: Parallel Simplification
---------------------------------------------------
Doing parallel simplification (16 in total)
Total simplification timout is 718 -- reduction timeout is 299
timeout 3589 /home/mcc/BenchKit/bin/verifypn -n -q 718 -l 29 -d 299 -z 4 -s OverApprox --binary-query-io 2 --write-simplified /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./UpperBounds.xml


Time left: 3583

---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (16 in total)
Each query is verified by 4 parallel strategies for 138 seconds
------------------- QUERY 1 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.728402 on verification
@@@2.98,150024@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 1 -n

FORMULA CANConstruction-PT-090-UpperBounds-00 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3579
------------------- QUERY 2 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.195072 on verification
@@@2.47,151356@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 2 -n

FORMULA CANConstruction-PT-090-UpperBounds-01 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3576
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.031643 on verification
@@@2.22,151116@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 3 -n

FORMULA CANConstruction-PT-090-UpperBounds-02 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3574
------------------- QUERY 4 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.41051 on verification
@@@2.61,150672@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 4 -n

FORMULA CANConstruction-PT-090-UpperBounds-03 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3571
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.112454 on verification
@@@2.26,151376@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 5 -n

FORMULA CANConstruction-PT-090-UpperBounds-04 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3568
------------------- QUERY 6 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.726037 on verification
@@@2.85,149744@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 6 -n

FORMULA CANConstruction-PT-090-UpperBounds-05 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3565
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.035234 on verification
@@@2.15,150920@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 7 -n

FORMULA CANConstruction-PT-090-UpperBounds-06 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3563
------------------- QUERY 8 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.156162 on verification
@@@2.30,151384@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 8 -n

FORMULA CANConstruction-PT-090-UpperBounds-07 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3560
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.041495 on verification
@@@2.16,150812@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 9 -n

FORMULA CANConstruction-PT-090-UpperBounds-08 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3558
------------------- QUERY 10 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.545551 on verification
@@@2.65,150460@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 10 -n

FORMULA CANConstruction-PT-090-UpperBounds-09 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3555
------------------- QUERY 11 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.043896 on verification
@@@2.13,149736@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 11 -n

FORMULA CANConstruction-PT-090-UpperBounds-10 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3553
------------------- QUERY 12 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 28.4784 on verification
@@@30.91,149548@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 12 -n

FORMULA CANConstruction-PT-090-UpperBounds-11 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3522
------------------- QUERY 13 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.114789 on verification
@@@2.19,150716@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 13 -n

FORMULA CANConstruction-PT-090-UpperBounds-12 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3519
------------------- QUERY 14 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.546878 on verification
@@@2.67,150972@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 14 -n

FORMULA CANConstruction-PT-090-UpperBounds-13 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3516
------------------- QUERY 15 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 31.3796 on verification
@@@33.49,150472@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 15 -n

FORMULA CANConstruction-PT-090-UpperBounds-14 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3482
------------------- QUERY 16 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved

Query is satisfied.

Spent 0.143643 on verification
@@@2.20,150176@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n '-n -s BFS -q 0 -l 0 -d 119' /home/mcc/BenchKit/bin/tmp/tmp.qxEQ8xgysX /home/mcc/BenchKit/bin/tmp/tmp.ApYwLONtBi --binary-query-io 1 -x 16 -n

FORMULA CANConstruction-PT-090-UpperBounds-15 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 3480
All queries are solved
Time left: 3480
terminated-with-cleanup

BK_STOP 1748714166795

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

CPN OverApproximation is only usable on colored models

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="CANConstruction-PT-090"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="tapaal"
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 2-5832"
echo " Executing tool tapaal"
echo " Input is CANConstruction-PT-090, examination is UpperBounds"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r032-smll-174853815800237"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/CANConstruction-PT-090.tgz
mv CANConstruction-PT-090 execution
cd execution
if [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "UpperBounds" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] || [ "UpperBounds" = "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 [ "UpperBounds" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "UpperBounds" != "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 "UpperBounds.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 '' UpperBounds.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] ; then
echo "FORMULA_NAME UpperBounds"
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 ;