About the Execution of LTSMin+red for SharedMemory-PT-000050
| Execution Summary | |||||
| Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
| 464.579 | 61548.00 | 77311.00 | 594.40 | 50 50 50 50 50 1 50 50 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/mcc2023-input.r361-smll-167891812000685.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 SharedMemory-PT-000050, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r361-smll-167891812000685
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 41M
-rw-r--r-- 1 mcc users 685K Feb 25 16:20 CTLCardinality.txt
-rw-r--r-- 1 mcc users 2.6M Feb 25 16:20 CTLCardinality.xml
-rw-r--r-- 1 mcc users 1.6M Feb 25 15:28 CTLFireability.txt
-rw-r--r-- 1 mcc users 6.1M Feb 25 15:27 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 665K Feb 25 16:53 LTLCardinality.txt
-rw-r--r-- 1 mcc users 1.8M Feb 25 16:53 LTLCardinality.xml
-rw-r--r-- 1 mcc users 480K Feb 25 16:53 LTLFireability.txt
-rw-r--r-- 1 mcc users 1.4M Feb 25 16:53 LTLFireability.xml
-rw-r--r-- 1 mcc users 1.5M Feb 25 18:10 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 5.7M Feb 25 18:10 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.3M Feb 25 17:32 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 13M Feb 25 17:32 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 5.9K Feb 25 16:53 UpperBounds.txt
-rw-r--r-- 1 mcc users 15K Feb 25 16:53 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 7 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 2.6M Mar 5 18:23 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
here is the order used to build the result vector(from text file)
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-00
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-01
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-02
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-03
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-04
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-05
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-06
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-07
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-08
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-09
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-10
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-11
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-12
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-13
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-14
FORMULA_NAME SharedMemory-PT-000050-UpperBounds-15
=== Now, execution of the tool begins
BK_START 1679455744523
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=UpperBounds
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=SharedMemory-PT-000050
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202303021504
[2023-03-22 03:29:06] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, UpperBounds, -timeout, 360, -rebuildPNML]
[2023-03-22 03:29:06] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-22 03:29:07] [INFO ] Load time of PNML (sax parser for PT used): 363 ms
[2023-03-22 03:29:07] [INFO ] Transformed 2651 places.
[2023-03-22 03:29:07] [INFO ] Transformed 5050 transitions.
[2023-03-22 03:29:07] [INFO ] Found NUPN structural information;
[2023-03-22 03:29:07] [INFO ] Completing missing partition info from NUPN : creating a component with [Ext_Mem_Acc_8_2, Ext_Mem_Acc_7_2, Ext_Mem_Acc_20_3, Ext_Mem_Acc_19_3, Ext_Mem_Acc_24_4, Ext_Mem_Acc_15_4, Ext_Mem_Acc_13_5, Ext_Mem_Acc_14_5, Ext_Mem_Acc_17_6, Ext_Mem_Acc_14_6, Ext_Mem_Acc_2_8, Ext_Mem_Acc_1_8, Ext_Mem_Acc_16_9, Ext_Mem_Acc_21_9, Ext_Mem_Acc_26_9, Ext_Mem_Acc_25_9, Ext_Mem_Acc_6_11, Ext_Mem_Acc_7_11, Ext_Mem_Acc_27_11, Ext_Mem_Acc_28_11, Ext_Mem_Acc_40_13, Ext_Mem_Acc_39_13, Ext_Mem_Acc_39_14, Ext_Mem_Acc_38_14, Ext_Mem_Acc_20_14, Ext_Mem_Acc_21_14, Ext_Mem_Acc_43_15, Ext_Mem_Acc_44_15, Ext_Mem_Acc_49_16, Ext_Mem_Acc_48_16, Ext_Mem_Acc_40_18, Ext_Mem_Acc_41_18, Ext_Mem_Acc_13_20, Ext_Mem_Acc_14_20, Ext_Mem_Acc_37_21, Ext_Mem_Acc_38_21, Ext_Mem_Acc_41_20, Ext_Mem_Acc_40_20, Ext_Mem_Acc_45_23, Ext_Mem_Acc_46_23, Ext_Mem_Acc_16_22, Ext_Mem_Acc_15_22, Ext_Mem_Acc_11_26, Ext_Mem_Acc_12_26, Ext_Mem_Acc_31_24, Ext_Mem_Acc_30_24, Ext_Mem_Acc_31_25, Ext_Mem_Acc_32_25, Ext_Mem_Acc_21_29, Ext_Mem_Acc_20_29, Ext_Mem_Acc_13_28, Ext_Mem_Acc_16_28, Ext_Mem_Acc_15_31, Ext_Mem_Acc_14_31, Ext_Mem_Acc_16_30, Ext_Mem_Acc_13_30, Ext_Mem_Acc_24_34, Ext_Mem_Acc_21_34, Ext_Mem_Acc_9_34, Ext_Mem_Acc_12_34, Ext_Mem_Acc_20_32, Ext_Mem_Acc_21_32, Ext_Mem_Acc_25_37, Ext_Mem_Acc_22_37, Ext_Mem_Acc_2_36, Ext_Mem_Acc_49_35, Ext_Mem_Acc_6_40, Ext_Mem_Acc_5_40, Ext_Mem_Acc_42_38, Ext_Mem_Acc_43_38, Ext_Mem_Acc_44_37, Ext_Mem_Acc_43_37, Ext_Mem_Acc_38_41, Ext_Mem_Acc_39_41, Ext_Mem_Acc_43_40, Ext_Mem_Acc_42_40, Ext_Mem_Acc_36_45, Ext_Mem_Acc_37_45, Ext_Mem_Acc_6_46, Ext_Mem_Acc_5_46, Ext_Mem_Acc_29_47, Ext_Mem_Acc_28_47, Ext_Mem_Acc_41_43, Ext_Mem_Acc_40_43, Ext_Mem_Acc_17_44, Ext_Mem_Acc_18_44, Ext_Mem_Acc_34_50, Ext_Mem_Acc_33_50, Ext_Mem_Acc_44_48, Ext_Mem_Acc_45_48, Ext_Mem_Acc_2_50, Ext_Mem_Acc_3_50]
[2023-03-22 03:29:07] [INFO ] Parsed PT model containing 2651 places and 5050 transitions and 20000 arcs in 505 ms.
Parsed 16 properties from file /home/mcc/execution/UpperBounds.xml in 17 ms.
FORMULA SharedMemory-PT-000050-UpperBounds-15 1 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SharedMemory-PT-000050-UpperBounds-14 1 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SharedMemory-PT-000050-UpperBounds-10 1 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SharedMemory-PT-000050-UpperBounds-08 1 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SharedMemory-PT-000050-UpperBounds-05 1 TECHNIQUES TOPOLOGICAL INITIAL_STATE
// Phase 1: matrix 5050 rows 2651 cols
[2023-03-22 03:29:08] [INFO ] Computed 101 place invariants in 442 ms
FORMULA SharedMemory-PT-000050-UpperBounds-07 50 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SharedMemory-PT-000050-UpperBounds-01 50 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SharedMemory-PT-000050-UpperBounds-00 50 TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 10000 steps, including 2 resets, run finished after 3935 ms. (steps per millisecond=2 ) properties (out of 8) seen :144
FORMULA SharedMemory-PT-000050-UpperBounds-13 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SharedMemory-PT-000050-UpperBounds-09 1 TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 45 ms. (steps per millisecond=222 ) properties (out of 6) seen :84
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 44 ms. (steps per millisecond=227 ) properties (out of 6) seen :84
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 41 ms. (steps per millisecond=243 ) properties (out of 6) seen :22
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 41 ms. (steps per millisecond=243 ) properties (out of 6) seen :22
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 32 ms. (steps per millisecond=312 ) properties (out of 6) seen :71
FORMULA SharedMemory-PT-000050-UpperBounds-11 1 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
[2023-03-22 03:29:12] [INFO ] Invariant cache hit.
[2023-03-22 03:29:13] [INFO ] [Real]Absence check using 101 positive place invariants in 175 ms returned sat
[2023-03-22 03:29:13] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:16] [INFO ] [Real]Absence check using state equation in 2328 ms returned sat
[2023-03-22 03:29:16] [INFO ] Solution in real domain found non-integer solution.
[2023-03-22 03:29:17] [INFO ] [Nat]Absence check using 101 positive place invariants in 180 ms returned sat
[2023-03-22 03:29:17] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:19] [INFO ] [Nat]Absence check using state equation in 2282 ms returned sat
[2023-03-22 03:29:20] [INFO ] Computed and/alt/rep : 4950/4950/4950 causal constraints (skipped 0 transitions) in 379 ms.
[2023-03-22 03:29:20] [INFO ] Added : 1 causal constraints over 1 iterations in 1110 ms. Result :sat
[2023-03-22 03:29:21] [INFO ] [Real]Absence check using 101 positive place invariants in 171 ms returned sat
[2023-03-22 03:29:21] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:24] [INFO ] [Real]Absence check using state equation in 2357 ms returned sat
[2023-03-22 03:29:24] [INFO ] Solution in real domain found non-integer solution.
[2023-03-22 03:29:25] [INFO ] [Nat]Absence check using 101 positive place invariants in 170 ms returned sat
[2023-03-22 03:29:25] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:27] [INFO ] [Nat]Absence check using state equation in 2548 ms returned sat
[2023-03-22 03:29:28] [INFO ] Computed and/alt/rep : 4950/4950/4950 causal constraints (skipped 0 transitions) in 361 ms.
[2023-03-22 03:29:29] [INFO ] Added : 1 causal constraints over 1 iterations in 1068 ms. Result :sat
[2023-03-22 03:29:30] [INFO ] [Real]Absence check using 101 positive place invariants in 183 ms returned sat
[2023-03-22 03:29:30] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:32] [INFO ] [Real]Absence check using state equation in 2344 ms returned sat
[2023-03-22 03:29:32] [INFO ] Solution in real domain found non-integer solution.
[2023-03-22 03:29:33] [INFO ] [Nat]Absence check using 101 positive place invariants in 178 ms returned sat
[2023-03-22 03:29:33] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:35] [INFO ] [Nat]Absence check using state equation in 2411 ms returned sat
[2023-03-22 03:29:36] [INFO ] Computed and/alt/rep : 4950/4950/4950 causal constraints (skipped 0 transitions) in 310 ms.
[2023-03-22 03:29:36] [INFO ] Added : 0 causal constraints over 0 iterations in 730 ms. Result :sat
[2023-03-22 03:29:37] [INFO ] [Real]Absence check using 101 positive place invariants in 184 ms returned sat
[2023-03-22 03:29:37] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:39] [INFO ] [Real]Absence check using state equation in 2377 ms returned sat
[2023-03-22 03:29:40] [INFO ] Solution in real domain found non-integer solution.
[2023-03-22 03:29:40] [INFO ] [Nat]Absence check using 101 positive place invariants in 194 ms returned sat
[2023-03-22 03:29:40] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:43] [INFO ] [Nat]Absence check using state equation in 2487 ms returned sat
[2023-03-22 03:29:43] [INFO ] Computed and/alt/rep : 4950/4950/4950 causal constraints (skipped 0 transitions) in 357 ms.
[2023-03-22 03:29:44] [INFO ] Added : 0 causal constraints over 0 iterations in 777 ms. Result :sat
[2023-03-22 03:29:45] [INFO ] [Real]Absence check using 101 positive place invariants in 187 ms returned sat
[2023-03-22 03:29:45] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:47] [INFO ] [Real]Absence check using state equation in 2494 ms returned sat
[2023-03-22 03:29:47] [INFO ] Solution in real domain found non-integer solution.
[2023-03-22 03:29:48] [INFO ] [Nat]Absence check using 101 positive place invariants in 197 ms returned sat
[2023-03-22 03:29:48] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2023-03-22 03:29:51] [INFO ] [Nat]Absence check using state equation in 2461 ms returned sat
[2023-03-22 03:29:51] [INFO ] Computed and/alt/rep : 4950/4950/4950 causal constraints (skipped 0 transitions) in 352 ms.
[2023-03-22 03:29:52] [INFO ] Added : 1 causal constraints over 1 iterations in 1013 ms. Result :sat
Current structural bounds on expressions (after SMT) : [50, 50, 50, 50, 1] Max seen :[42, 42, 49, 49, 0]
FORMULA SharedMemory-PT-000050-UpperBounds-12 1 TECHNIQUES TOPOLOGICAL PARIKH_WALK
FORMULA SharedMemory-PT-000050-UpperBounds-06 50 TECHNIQUES TOPOLOGICAL PARIKH_WALK
FORMULA SharedMemory-PT-000050-UpperBounds-04 50 TECHNIQUES TOPOLOGICAL PARIKH_WALK
Support contains 50 out of 2651 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 2651/2651 places, 5050/5050 transitions.
Drop transitions removed 2450 transitions
Trivial Post-agglo rules discarded 2450 transitions
Performed 2450 trivial Post agglomeration. Transition count delta: 2450
Iterating post reduction 0 with 2450 rules applied. Total rules applied 2450 place count 2651 transition count 2600
Reduce places removed 2501 places and 0 transitions.
Ensure Unique test removed 2400 transitions
Reduce isomorphic transitions removed 2400 transitions.
Graph (trivial) has 100 edges and 150 vertex of which 100 / 150 are part of one of the 50 SCC in 4 ms
Free SCC test removed 50 places
Iterating post reduction 1 with 4902 rules applied. Total rules applied 7352 place count 100 transition count 200
Drop transitions removed 100 transitions
Reduce isomorphic transitions removed 100 transitions.
Iterating post reduction 2 with 100 rules applied. Total rules applied 7452 place count 100 transition count 100
Applied a total of 7452 rules in 165 ms. Remains 100 /2651 variables (removed 2551) and now considering 100/5050 (removed 4950) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 167 ms. Remains : 100/2651 places, 100/5050 transitions.
// Phase 1: matrix 100 rows 100 cols
[2023-03-22 03:29:53] [INFO ] Computed 50 place invariants in 1 ms
Incomplete random walk after 1000000 steps, including 2 resets, run finished after 8737 ms. (steps per millisecond=114 ) properties (out of 2) seen :82
Incomplete Best-First random walk after 1000001 steps, including 2 resets, run finished after 3206 ms. (steps per millisecond=311 ) properties (out of 2) seen :100
FORMULA SharedMemory-PT-000050-UpperBounds-03 50 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA SharedMemory-PT-000050-UpperBounds-02 50 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
All properties solved without resorting to model-checking.
Total runtime 58157 ms.
ITS solved all properties within timeout
BK_STOP 1679455806071
--------------------
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 UpperBounds -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="SharedMemory-PT-000050"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="ltsminxred"
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 ltsminxred"
echo " Input is SharedMemory-PT-000050, 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 r361-smll-167891812000685"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/SharedMemory-PT-000050.tgz
mv SharedMemory-PT-000050 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.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property UpperBounds.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -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 '
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 ;