Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2024-input.r377-smll-171683809800158.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2024-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 2-5568
Executing tool greatspnxred
Input is SimpleLoadBal-PT-05, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r377-smll-171683809800158
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 768K
-rw-r--r-- 1 mcc users 8.8K May 14 13:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 77K May 14 13:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 8.0K May 14 13:22 CTLFireability.txt
-rw-r--r-- 1 mcc users 57K May 14 13:22 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:43 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.8K May 18 16:43 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 5.7K Apr 23 07:56 LTLCardinality.txt
-rw-r--r-- 1 mcc users 32K Apr 23 07:56 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.3K Apr 23 07:56 LTLFireability.txt
-rw-r--r-- 1 mcc users 22K Apr 23 07:56 LTLFireability.xml
-rw-r--r-- 1 mcc users 23K Apr 13 12:09 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 196K Apr 13 12:09 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 17K Apr 13 12:08 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 107K Apr 13 12:08 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Apr 23 07:56 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K Apr 23 07:56 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 18 16:43 equiv_col
-rw-r--r-- 1 mcc users 3 May 18 16:43 instance
-rw-r--r-- 1 mcc users 6 May 18 16:43 iscolored
-rw-r--r-- 1 mcc users 155K May 18 16:43 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 SimpleLoadBal-PT-05-ReachabilityCardinality-2024-00
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-01
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-02
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-03
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-04
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-05
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-06
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-07
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-08
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-09
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-10
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-11
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-12
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-13
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-14
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityCardinality-2024-15

=== Now, execution of the tool begins

BK_START 1716936828348

Invoking MCC driver with
BK_TOOL=greatspnxred
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=SimpleLoadBal-PT-05
BK_MEMORY_CONFINEMENT=16384
Applying reductions before tool greatspn
Invoking reducer
Running Version 202405141337
[2024-05-28 22:53:50] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -timeout, 360, -rebuildPNML]
[2024-05-28 22:53:50] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-28 22:53:50] [INFO ] Load time of PNML (sax parser for PT used): 130 ms
[2024-05-28 22:53:50] [INFO ] Transformed 59 places.
[2024-05-28 22:53:50] [INFO ] Transformed 180 transitions.
[2024-05-28 22:53:50] [INFO ] Found NUPN structural information;
[2024-05-28 22:53:50] [INFO ] Completing missing partition info from NUPN : creating a component with [P_client_idle_1, P_client_idle_2, P_client_idle_3, P_client_idle_4, P_client_idle_5, P_client_waiting_1, P_client_waiting_2, P_client_waiting_3, P_client_waiting_4, P_client_waiting_5, P_client_request_1, P_client_request_2, P_client_request_3, P_client_request_4, P_client_request_5, P_client_ack_1, P_client_ack_2, P_client_ack_3, P_client_ack_4, P_client_ack_5, P_server_idle_1, P_server_idle_2, P_server_waiting_1, P_server_waiting_2, P_server_processed_1, P_server_processed_2, P_server_notification_1, P_server_notification_2, P_server_notification_ack_1, P_server_notification_ack_2, P_server_request_1_1, P_server_request_1_2, P_server_request_2_1, P_server_request_2_2, P_server_request_3_1, P_server_request_3_2, P_server_request_4_1, P_server_request_4_2, P_server_request_5_1, P_server_request_5_2, P_lb_idle_1, P_lb_routing_1_1, P_lb_routing_1_2, P_lb_routing_1_3, P_lb_routing_1_4, P_lb_routing_1_5, P_lb_balancing_1, P_lb_load_1_0, P_lb_load_1_1, P_lb_load_1_2, P_lb_load_1_3, P_lb_load_1_4, P_lb_load_1_5, P_lb_load_2_0, P_lb_load_2_1, P_lb_load_2_2, P_lb_load_2_3, P_lb_load_2_4, P_lb_load_2_5]
[2024-05-28 22:53:50] [INFO ] Parsed PT model containing 59 places and 180 transitions and 1158 arcs in 396 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 40 ms.
Working with output stream class java.io.PrintStream
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-00 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-02 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-03 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-05 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-09 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-15 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
RANDOM walk for 40000 steps (8 resets) in 2405 ms. (16 steps per ms) remains 5/8 properties
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-12 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-08 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 40002 steps (8 resets) in 599 ms. (66 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40003 steps (8 resets) in 306 ms. (130 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40002 steps (8 resets) in 1303 ms. (30 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40003 steps (8 resets) in 189 ms. (210 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40004 steps (8 resets) in 232 ms. (171 steps per ms) remains 5/5 properties
[2024-05-28 22:53:52] [INFO ] Flow matrix only has 140 transitions (discarded 40 similar events)
// Phase 1: matrix 140 rows 59 cols
[2024-05-28 22:53:52] [INFO ] Computed 19 invariants in 27 ms
[2024-05-28 22:53:52] [INFO ] State equation strengthened by 55 read => feed constraints.
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/48 variables, 48/48 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/48 variables, 4/52 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/48 variables, 0/52 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 3 (OVERLAPS) 10/58 variables, 12/64 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/58 variables, 10/74 constraints. Problems are: Problem set: 0 solved, 5 unsolved
Problem SimpleLoadBal-PT-05-ReachabilityCardinality-2024-07 is UNSAT
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-07 FALSE TECHNIQUES SMT_REFINEMENT
Problem SimpleLoadBal-PT-05-ReachabilityCardinality-2024-10 is UNSAT
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-10 FALSE TECHNIQUES SMT_REFINEMENT
At refinement iteration 5 (INCLUDED_ONLY) 0/58 variables, 2/76 constraints. Problems are: Problem set: 2 solved, 3 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/58 variables, 0/76 constraints. Problems are: Problem set: 2 solved, 3 unsolved
At refinement iteration 7 (OVERLAPS) 1/59 variables, 1/77 constraints. Problems are: Problem set: 2 solved, 3 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/59 variables, 1/78 constraints. Problems are: Problem set: 2 solved, 3 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/59 variables, 0/78 constraints. Problems are: Problem set: 2 solved, 3 unsolved
At refinement iteration 10 (OVERLAPS) 140/199 variables, 59/137 constraints. Problems are: Problem set: 2 solved, 3 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/199 variables, 55/192 constraints. Problems are: Problem set: 2 solved, 3 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/199 variables, 0/192 constraints. Problems are: Problem set: 2 solved, 3 unsolved
At refinement iteration 13 (OVERLAPS) 0/199 variables, 0/192 constraints. Problems are: Problem set: 2 solved, 3 unsolved
No progress, stopping.
After SMT solving in domain Real declared 199/199 variables, and 192 constraints, problems are : Problem set: 2 solved, 3 unsolved in 776 ms.
Refiners :[Domain max(s): 59/59 constraints, Positive P Invariants (semi-flows): 16/16 constraints, Generalized P Invariants (flows): 3/3 constraints, State Equation: 59/59 constraints, ReadFeed: 55/55 constraints, PredecessorRefiner: 5/5 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 2 solved, 3 unsolved
Problem SimpleLoadBal-PT-05-ReachabilityCardinality-2024-13 is UNSAT
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-13 TRUE TECHNIQUES SMT_REFINEMENT
At refinement iteration 0 (INCLUDED_ONLY) 0/32 variables, 32/32 constraints. Problems are: Problem set: 3 solved, 2 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/32 variables, 1/33 constraints. Problems are: Problem set: 3 solved, 2 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/32 variables, 0/33 constraints. Problems are: Problem set: 3 solved, 2 unsolved
At refinement iteration 3 (OVERLAPS) 22/54 variables, 14/47 constraints. Problems are: Problem set: 3 solved, 2 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/54 variables, 22/69 constraints. Problems are: Problem set: 3 solved, 2 unsolved
[2024-05-28 22:53:53] [INFO ] Deduced a trap composed of 8 places in 100 ms of which 11 ms to minimize.
At refinement iteration 5 (INCLUDED_ONLY) 0/54 variables, 1/70 constraints. Problems are: Problem set: 3 solved, 2 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/54 variables, 0/70 constraints. Problems are: Problem set: 3 solved, 2 unsolved
At refinement iteration 7 (OVERLAPS) 1/55 variables, 1/71 constraints. Problems are: Problem set: 3 solved, 2 unsolved
At refinement iteration 8 (INCLUDED_ONLY) 0/55 variables, 1/72 constraints. Problems are: Problem set: 3 solved, 2 unsolved
At refinement iteration 9 (INCLUDED_ONLY) 0/55 variables, 0/72 constraints. Problems are: Problem set: 3 solved, 2 unsolved
Problem SimpleLoadBal-PT-05-ReachabilityCardinality-2024-06 is UNSAT
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-06 TRUE TECHNIQUES SMT_REFINEMENT
At refinement iteration 10 (OVERLAPS) 4/59 variables, 3/75 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 11 (INCLUDED_ONLY) 0/59 variables, 4/79 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 12 (INCLUDED_ONLY) 0/59 variables, 0/79 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 13 (OVERLAPS) 140/199 variables, 59/138 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 14 (INCLUDED_ONLY) 0/199 variables, 55/193 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 15 (INCLUDED_ONLY) 0/199 variables, 1/194 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 16 (INCLUDED_ONLY) 0/199 variables, 0/194 constraints. Problems are: Problem set: 4 solved, 1 unsolved
At refinement iteration 17 (OVERLAPS) 0/199 variables, 0/194 constraints. Problems are: Problem set: 4 solved, 1 unsolved
No progress, stopping.
After SMT solving in domain Int declared 199/199 variables, and 194 constraints, problems are : Problem set: 4 solved, 1 unsolved in 398 ms.
Refiners :[Domain max(s): 59/59 constraints, Positive P Invariants (semi-flows): 16/16 constraints, Generalized P Invariants (flows): 3/3 constraints, State Equation: 59/59 constraints, ReadFeed: 55/55 constraints, PredecessorRefiner: 1/5 constraints, Known Traps: 1/1 constraints]
After SMT, in 1470ms problems are : Problem set: 4 solved, 1 unsolved
Parikh walk visited 0 properties in 32 ms.
Support contains 8 out of 59 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 59/59 places, 180/180 transitions.
Performed 2 Post agglomeration using F-continuation condition.Transition count delta: 2
Deduced a syphon composed of 2 places in 1 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 0 with 4 rules applied. Total rules applied 4 place count 57 transition count 178
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 3
Deduced a syphon composed of 3 places in 1 ms
Reduce places removed 6 places and 0 transitions.
Iterating global reduction 0 with 9 rules applied. Total rules applied 13 place count 51 transition count 175
Performed 3 Post agglomeration using F-continuation condition.Transition count delta: 3
Deduced a syphon composed of 3 places in 1 ms
Reduce places removed 3 places and 0 transitions.
Iterating global reduction 0 with 6 rules applied. Total rules applied 19 place count 48 transition count 172
Free-agglomeration rule (complex) applied 4 times.
Iterating global reduction 0 with 4 rules applied. Total rules applied 23 place count 48 transition count 168
Reduce places removed 4 places and 0 transitions.
Iterating post reduction 0 with 4 rules applied. Total rules applied 27 place count 44 transition count 168
Applied a total of 27 rules in 74 ms. Remains 44 /59 variables (removed 15) and now considering 168/180 (removed 12) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 90 ms. Remains : 44/59 places, 168/180 transitions.
RANDOM walk for 40000 steps (8 resets) in 403 ms. (99 steps per ms) remains 1/1 properties
BEST_FIRST walk for 40002 steps (8 resets) in 78 ms. (506 steps per ms) remains 1/1 properties
Probably explored full state space saw : 9875 states, properties seen :0
Probabilistic random walk after 52630 steps, saw 9875 distinct states, run finished after 154 ms. (steps per millisecond=341 ) properties seen :0
Explored full state space saw : 9875 states, properties seen :0
Exhaustive walk after 52630 steps, saw 9875 distinct states, run finished after 95 ms. (steps per millisecond=554 ) properties seen :0
FORMULA SimpleLoadBal-PT-05-ReachabilityCardinality-2024-11 TRUE TECHNIQUES TOPOLOGICAL EXHAUSTIVE_WALK
All properties solved without resorting to model-checking.
Total runtime 4289 ms.
ITS solved all properties within timeout

BK_STOP 1716936834658

--------------------
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_1.0.0.202405141337.jar
+ VERSION=202405141337
+ echo 'Running Version 202405141337'
+ /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="SimpleLoadBal-PT-05"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="greatspnxred"
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 2-5568"
echo " Executing tool greatspnxred"
echo " Input is SimpleLoadBal-PT-05, 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 r377-smll-171683809800158"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/SimpleLoadBal-PT-05.tgz
mv SimpleLoadBal-PT-05 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 ;