About the Execution of Tapaal for UtilityControlRoom-COL-Z4T4N08
| Execution Summary | |||||
| Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
| 16224.976 | 3592107.00 | 11353025.00 | 5952.60 | ?FFT?T??F?TT??TF | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2022-input.r273-smll-165307351300130.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2022-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 2-4028
Executing tool tapaal
Input is UtilityControlRoom-COL-Z4T4N08, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r273-smll-165307351300130
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 248K
-rw-r--r-- 1 mcc users 7.9K Apr 29 18:12 CTLCardinality.txt
-rw-r--r-- 1 mcc users 72K Apr 29 18:12 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.3K Apr 29 18:09 CTLFireability.txt
-rw-r--r-- 1 mcc users 50K Apr 29 18:09 CTLFireability.xml
-rw-r--r-- 1 mcc users 5 May 10 09:34 equiv_pt
-rw-r--r-- 1 mcc users 8 May 10 09:34 instance
-rw-r--r-- 1 mcc users 5 May 10 09:34 iscolored
-rw-r--r-- 1 mcc users 4.1K May 9 09:21 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K May 9 09:21 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.9K May 9 09:21 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K May 9 09:21 LTLFireability.xml
-rw-r--r-- 1 mcc users 29K May 10 09:34 model.pnml
-rw-r--r-- 1 mcc users 1.9K May 9 09:21 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.0K May 9 09:21 UpperBounds.xml
--------------------
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 UtilityControlRoom-COL-Z4T4N08-CTLFireability-00
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-01
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-02
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-03
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-04
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-05
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-06
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-07
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-08
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-09
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-10
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-11
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-12
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-13
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-14
FORMULA_NAME UtilityControlRoom-COL-Z4T4N08-CTLFireability-15
=== Now, execution of the tool begins
BK_START 1653147730445
tapaal
Got BK_BIN_PATH=/home/mcc/BenchKit/bin/
---> tapaal --- TAPAAL v5
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 verifying CTLFireability *
*************************************
TEMPDIR=/home/mcc/BenchKit/bin/tmp
QF=/home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b
MF=/home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc
Time left: 3590
---------------------------------------------------
Step -1: Stripping Colors
---------------------------------------------------
Verifying stripped models (16 in total)
/home/mcc/BenchKit/bin/verifypn -n -c -q 718 -l 29 -d 299 -z 4 -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./CTLFireability.xml
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-15
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-14
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-13
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-12
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-11
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-10
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-09
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-08
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-07
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-06
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-04
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-03
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-02
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-01
Warning: CPN OverApproximation is only available for Reachability queries without deadlock, negated fireability and UpperBounds, skipping UtilityControlRoom-COL-Z4T4N08-CTLFireability-00
Unable to decide if UtilityControlRoom-COL-Z4T4N08-CTLFireability-05 is satisfied.
Query is MAYBE satisfied.
Spent 0.004511 on verification
Time left: 3590
---------------------------------------------------
Step 0: Parallel Simplification
---------------------------------------------------
Doing parallel simplification (16 in total)
Total simplification timout is 718 -- reduction timeout is 299
timeout 3590 /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.EZbE8Od46b --write-reduced /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc -x 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ./model.pnml ./CTLFireability.xml
Time left: 3586
---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (16 in total)
Each query is verified by 4 parallel strategies for 299 seconds
------------------- QUERY 1 ----------------------
Solution found by parallel processing (step 1)
Search strategy option was ignored as the TAR engine is called.
Query index 0 was solved
Query is satisfied.
Solved using Trace Abstraction Refinement
Spent 0.000225 on verification
@@@0.03,6536@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 1 -n
FORMULA UtilityControlRoom-COL-Z4T4N08-CTLFireability-05 TRUE TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT TRACE_ABSTRACTION_REFINEMENT
Time left: 3585
------------------- QUERY 2 ----------------------
No solution found
Command terminated by signal 9
@@@112.62,6332084@@@
Command terminated by signal 9
@@@195.94,9292204@@@
Time left: 3284
------------------- QUERY 3 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.085188 on verification
@@@0.13,60292@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -s\ DFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 3 -n
FORMULA UtilityControlRoom-COL-Z4T4N08-CTLFireability-01 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 3283
------------------- QUERY 4 ----------------------
No solution found
Time left: 2981
------------------- QUERY 5 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.544437 on verification
@@@0.59,60332@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -s\ DFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 5 -n
FORMULA UtilityControlRoom-COL-Z4T4N08-CTLFireability-02 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2980
------------------- QUERY 6 ----------------------
No solution found
Command terminated by signal 9
@@@176.83,6837536@@@
Time left: 2678
------------------- QUERY 7 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.066597 on verification
@@@0.08,60720@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -s\ DFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 7 -n
FORMULA UtilityControlRoom-COL-Z4T4N08-CTLFireability-10 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2677
------------------- QUERY 8 ----------------------
No solution found
Command terminated by signal 9
@@@114.62,6004032@@@
Command terminated by signal 9
@@@193.62,8753428@@@
Time left: 2375
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.079886 on verification
@@@0.12,60204@@@
Query index 0 was solved
Query is NOT satisfied.
Spent 0.07787 on verification
@@@0.10,60304@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 9 -n
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 9 -n
FORMULA UtilityControlRoom-COL-Z4T4N08-CTLFireability-08 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2375
------------------- QUERY 10 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.088939 on verification
@@@0.11,60364@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -s\ DFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 10 -n
FORMULA UtilityControlRoom-COL-Z4T4N08-CTLFireability-11 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2375
------------------- QUERY 11 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is NOT satisfied.
Spent 0.078657 on verification
@@@0.09,60400@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 11 -n
FORMULA UtilityControlRoom-COL-Z4T4N08-CTLFireability-15 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 2374
------------------- QUERY 12 ----------------------
No solution found
Command terminated by signal 9
@@@170.71,7887520@@@
Time left: 2072
------------------- QUERY 13 ----------------------
No solution found
Time left: 1770
------------------- QUERY 14 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 1.06338 on verification
@@@1.09,70360@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -tar\ -s\ RDFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 14 -n
FORMULA UtilityControlRoom-COL-Z4T4N08-CTLFireability-03 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 1769
------------------- QUERY 15 ----------------------
No solution found
Time left: 1467
------------------- QUERY 16 ----------------------
Solution found by parallel processing (step 1)
Query index 0 was solved
Query is satisfied.
Spent 0.078631 on verification
@@@0.09,60528@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/BenchKit/bin/tmp/tmp.DfqYvpzfzc /home/mcc/BenchKit/bin/tmp/tmp.EZbE8Od46b --binary-query-io 1 -x 16 -n
FORMULA UtilityControlRoom-COL-Z4T4N08-CTLFireability-14 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT STATE_COMPRESSION SAT_SMT STUBBORN_SETS CTL_CZERO
Time left: 1466
---------------------------------------------------
Step 2: Sequential processing
---------------------------------------------------
Remaining 7 queries are verified sequentially.
Each query is verified for a dynamic timeout (at least 598 seconds)
Time left: 1466
------------------- QUERY 2 ----------------------
Running query 2 for 598 seconds. Remaining: 7 queries and 1466 seconds
No solution found
Command terminated by signal 9
@@@151.06,8612656@@@
Command terminated by signal 9
@@@337.27,16148852@@@
Time left: 1129
------------------- QUERY 4 ----------------------
Running query 4 for 598 seconds. Remaining: 6 queries and 1129 seconds
No solution found
Time left: 527
------------------- QUERY 6 ----------------------
Time left: 527
---------------------------------------------------
Step 4: Random Parallel processing
---------------------------------------------------
Doing random parallel verification of individual queries (7 in total)
Each query is verified by 4 parallel strategies for 75 seconds
------------------- QUERY 2 ----------------------
No solution found
Time left: 449
------------------- QUERY 4 ----------------------
No solution found
Time left: 371
------------------- QUERY 6 ----------------------
No solution found
Time left: 292
------------------- QUERY 8 ----------------------
No solution found
Time left: 214
------------------- QUERY 12 ----------------------
No solution found
Command terminated by signal 9
@@@78.04,4107892@@@
Time left: 134
------------------- QUERY 13 ----------------------
No solution found
Time left: 57
------------------- QUERY 15 ----------------------
No solution found
Time left: -2
Out of time, terminating!
terminated-with-cleanup
BK_STOP 1653151322552
--------------------
content from stderr:
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="UtilityControlRoom-COL-Z4T4N08"
export BK_EXAMINATION="CTLFireability"
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 2-4028"
echo " Executing tool tapaal"
echo " Input is UtilityControlRoom-COL-Z4T4N08, examination is CTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r273-smll-165307351300130"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/UtilityControlRoom-COL-Z4T4N08.tgz
mv UtilityControlRoom-COL-Z4T4N08 execution
cd execution
if [ "CTLFireability" = "ReachabilityDeadlock" ] || [ "CTLFireability" = "UpperBounds" ] || [ "CTLFireability" = "QuasiLiveness" ] || [ "CTLFireability" = "StableMarking" ] || [ "CTLFireability" = "Liveness" ] || [ "CTLFireability" = "OneSafe" ] || [ "CTLFireability" = "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 [ "CTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLFireability" != "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 "CTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLFireability.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 '
echo "FORMULA_NAME $x"
done
elif [ "CTLFireability" = "ReachabilityDeadlock" ] || [ "CTLFireability" = "QuasiLiveness" ] || [ "CTLFireability" = "StableMarking" ] || [ "CTLFireability" = "Liveness" ] || [ "CTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLFireability"
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 ;