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.r113-smll-162075355700068.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2021-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
............................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool gold2020
Input is FlexibleBarrier-PT-20a, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r113-smll-162075355700068
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 760K
-rw-r--r-- 1 mcc users 15K May 5 16:58 CTLCardinality.txt
-rw-r--r-- 1 mcc users 138K May 10 09:43 CTLCardinality.xml
-rw-r--r-- 1 mcc users 13K May 5 16:58 CTLFireability.txt
-rw-r--r-- 1 mcc users 119K May 10 09:43 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 6 14:48 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K May 6 14:48 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.4K Mar 28 16:12 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Mar 28 16:12 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K Mar 28 16:12 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Mar 28 16:12 LTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Mar 23 11:20 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 21K Mar 23 11:20 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 2.9K Mar 22 19:48 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 18K Mar 22 19:48 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Mar 22 09:15 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Mar 22 09:15 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 5 16:51 equiv_col
-rw-r--r-- 1 mcc users 4 May 5 16:51 instance
-rw-r--r-- 1 mcc users 6 May 5 16:51 iscolored
-rw-r--r-- 1 mcc users 321K May 5 16:51 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 FlexibleBarrier-PT-20a-ReachabilityFireability-00
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-01
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-02
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-03
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-04
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-05
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-06
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-07
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-08
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-09
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-10
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-11
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-12
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-13
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-14
FORMULA_NAME FlexibleBarrier-PT-20a-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1620935754651

bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
[2021-05-13 19:55:58] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -timeout, 3600, -rebuildPNML]
[2021-05-13 19:55:58] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2021-05-13 19:55:58] [INFO ] Load time of PNML (sax parser for PT used): 264 ms
[2021-05-13 19:55:58] [INFO ] Transformed 243 places.
[2021-05-13 19:55:58] [INFO ] Transformed 1064 transitions.
[2021-05-13 19:55:58] [INFO ] Found NUPN structural information;
[2021-05-13 19:55:58] [INFO ] Parsed PT model containing 243 places and 1064 transitions in 365 ms.
Ensure Unique test removed 362 transitions
Reduce redundant transitions removed 362 transitions.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 70 ms.
Working with output stream class java.io.PrintStream
Incomplete random walk after 10000 steps, including 0 resets, run finished after 169 ms. (steps per millisecond=59 ) properties seen :[1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0]
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-11 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-10 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-00 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 0 resets, run finished after 21 ms. (steps per millisecond=476 ) properties seen :[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
Incomplete Best-First random walk after 10001 steps, including 0 resets, run finished after 20 ms. (steps per millisecond=500 ) properties seen :[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
Incomplete Best-First random walk after 10001 steps, including 0 resets, run finished after 33 ms. (steps per millisecond=303 ) properties seen :[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
Incomplete Best-First random walk after 10000 steps, including 0 resets, run finished after 40 ms. (steps per millisecond=250 ) properties seen :[0, 0, 0, 0, 0, 0, 0, 0, 1, 0]
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-14 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 0 resets, run finished after 32 ms. (steps per millisecond=312 ) properties seen :[0, 0, 0, 0, 0, 0, 0, 0, 0]
Incomplete Best-First random walk after 10001 steps, including 0 resets, run finished after 15 ms. (steps per millisecond=666 ) properties seen :[0, 0, 0, 0, 0, 0, 0, 0, 0]
Incomplete Best-First random walk after 10001 steps, including 0 resets, run finished after 67 ms. (steps per millisecond=149 ) properties seen :[0, 0, 0, 0, 0, 0, 1, 0, 0]
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-12 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 10001 steps, including 0 resets, run finished after 23 ms. (steps per millisecond=434 ) properties seen :[0, 0, 0, 0, 0, 0, 0, 0]
Incomplete Best-First random walk after 10001 steps, including 0 resets, run finished after 39 ms. (steps per millisecond=256 ) properties seen :[0, 0, 0, 0, 0, 0, 0, 0]
[2021-05-13 19:55:59] [INFO ] Flow matrix only has 682 transitions (discarded 20 similar events)
// Phase 1: matrix 682 rows 243 cols
[2021-05-13 19:55:59] [INFO ] Computed 22 place invariants in 19 ms
[2021-05-13 19:55:59] [INFO ] [Real]Absence check using 22 positive place invariants in 70 ms returned sat
[2021-05-13 19:55:59] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-13 19:56:00] [INFO ] [Real]Absence check using state equation in 704 ms returned sat
[2021-05-13 19:56:00] [INFO ] State equation strengthened by 501 read => feed constraints.
[2021-05-13 19:56:00] [INFO ] [Real]Added 501 Read/Feed constraints in 88 ms returned sat
[2021-05-13 19:56:00] [INFO ] Computed and/alt/rep : 701/16464/681 causal constraints in 195 ms.
[2021-05-13 19:56:01] [INFO ] Solution in real domain found non-integer solution.
[2021-05-13 19:56:01] [INFO ] [Nat]Absence check using 22 positive place invariants in 45 ms returned sat
[2021-05-13 19:56:01] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-13 19:56:01] [INFO ] [Nat]Absence check using state equation in 643 ms returned sat
[2021-05-13 19:56:01] [INFO ] [Nat]Added 501 Read/Feed constraints in 60 ms returned sat
[2021-05-13 19:56:02] [INFO ] Computed and/alt/rep : 701/16464/681 causal constraints in 120 ms.
[2021-05-13 19:56:06] [INFO ] Added : 255 causal constraints over 51 iterations in 4106 ms. Result :(error "Failed to check-sat")
[2021-05-13 19:56:06] [INFO ] [Real]Absence check using 22 positive place invariants in 21 ms returned unsat
[2021-05-13 19:56:06] [INFO ] [Real]Absence check using 22 positive place invariants in 36 ms returned sat
[2021-05-13 19:56:06] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-13 19:56:06] [INFO ] [Real]Absence check using state equation in 659 ms returned sat
[2021-05-13 19:56:07] [INFO ] [Real]Added 501 Read/Feed constraints in 70 ms returned sat
[2021-05-13 19:56:07] [INFO ] Computed and/alt/rep : 701/16464/681 causal constraints in 118 ms.
[2021-05-13 19:56:07] [INFO ] Solution in real domain found non-integer solution.
[2021-05-13 19:56:07] [INFO ] [Nat]Absence check using 22 positive place invariants in 39 ms returned sat
[2021-05-13 19:56:07] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-13 19:56:08] [INFO ] [Nat]Absence check using state equation in 658 ms returned sat
[2021-05-13 19:56:08] [INFO ] [Nat]Added 501 Read/Feed constraints in 98 ms returned sat
[2021-05-13 19:56:08] [INFO ] Computed and/alt/rep : 701/16464/681 causal constraints in 128 ms.
[2021-05-13 19:56:12] [INFO ] Added : 255 causal constraints over 51 iterations in 4121 ms. Result :(error "Failed to check-sat")
[2021-05-13 19:56:12] [INFO ] [Real]Absence check using 22 positive place invariants in 11 ms returned unsat
[2021-05-13 19:56:12] [INFO ] [Real]Absence check using 22 positive place invariants in 28 ms returned unsat
[2021-05-13 19:56:12] [INFO ] [Real]Absence check using 22 positive place invariants in 43 ms returned sat
[2021-05-13 19:56:12] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-13 19:56:13] [INFO ] [Real]Absence check using state equation in 588 ms returned sat
[2021-05-13 19:56:13] [INFO ] [Real]Added 501 Read/Feed constraints in 55 ms returned sat
[2021-05-13 19:56:13] [INFO ] Computed and/alt/rep : 701/16464/681 causal constraints in 79 ms.
[2021-05-13 19:56:13] [INFO ] Solution in real domain found non-integer solution.
[2021-05-13 19:56:13] [INFO ] [Nat]Absence check using 22 positive place invariants in 33 ms returned sat
[2021-05-13 19:56:13] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-13 19:56:14] [INFO ] [Nat]Absence check using state equation in 583 ms returned sat
[2021-05-13 19:56:14] [INFO ] [Nat]Added 501 Read/Feed constraints in 61 ms returned sat
[2021-05-13 19:56:14] [INFO ] Computed and/alt/rep : 701/16464/681 causal constraints in 88 ms.
[2021-05-13 19:56:18] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Broken pipe (=> (> t281 0) (and (or (and (> t0 0) (< o0 o281)) (and (> t14 0) (< o14 o281)) (and (> t300 0) (< o300 o281)) (and (> t301 0) (< o301 o281)) (and (> t302 0) (< o302 o281)) (and (> t303 0) (< o303 o281)) (and (> t304 0) (< o304 o281)) (and (> t305 0) (< o305 o281)) (and (> t306 0) (< o306 o281)) (and (> t307 0) (< o307 o281)) (and (> t308 0) (< o308 o281)) (and (> t309 0) (< o309 o281)) (and (> t310 0) (< o310 o281)) (and (> t311 0) (< o311 o281)) (and (> t312 0) (< o312 o281)) (and (> t313 0) (< o313 o281)) (and (> t314 0) (< o314 o281)) (and (> t315 0) (< o315 o281)) (and (> t316 0) (< o316 o281)) (and (> t317 0) (< o317 o281)) (and (> t680 0) (< o680 o281))) (and (> t8 0) (< o8 o281)) (and (> t0 0) (< o0 o281))))") while checking expression at index 5
[2021-05-13 19:56:18] [INFO ] [Real]Absence check using 22 positive place invariants in 34 ms returned sat
[2021-05-13 19:56:18] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-13 19:56:19] [INFO ] [Real]Absence check using state equation in 582 ms returned sat
[2021-05-13 19:56:19] [INFO ] [Real]Added 501 Read/Feed constraints in 56 ms returned sat
[2021-05-13 19:56:19] [INFO ] Computed and/alt/rep : 701/16464/681 causal constraints in 71 ms.
[2021-05-13 19:56:19] [INFO ] Solution in real domain found non-integer solution.
[2021-05-13 19:56:19] [INFO ] [Nat]Absence check using 22 positive place invariants in 36 ms returned sat
[2021-05-13 19:56:19] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-13 19:56:20] [INFO ] [Nat]Absence check using state equation in 613 ms returned sat
[2021-05-13 19:56:20] [INFO ] [Nat]Added 501 Read/Feed constraints in 78 ms returned sat
[2021-05-13 19:56:20] [INFO ] Computed and/alt/rep : 701/16464/681 causal constraints in 87 ms.
[2021-05-13 19:56:24] [INFO ] Added : 260 causal constraints over 52 iterations in 4182 ms. Result :(error "Failed to check-sat")
[2021-05-13 19:56:24] [INFO ] [Real]Absence check using 22 positive place invariants in 32 ms returned unsat
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-15 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-07 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-06 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-03 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Support contains 26 out of 243 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 243/243 places, 702/702 transitions.
Graph (trivial) has 155 edges and 243 vertex of which 18 / 243 are part of one of the 6 SCC in 18 ms
Free SCC test removed 12 places
Drop transitions removed 54 transitions
Reduce isomorphic transitions removed 54 transitions.
Iterating post reduction 0 with 54 rules applied. Total rules applied 55 place count 231 transition count 648
Performed 50 Post agglomeration using F-continuation condition.Transition count delta: 50
Deduced a syphon composed of 50 places in 2 ms
Reduce places removed 50 places and 0 transitions.
Iterating global reduction 1 with 100 rules applied. Total rules applied 155 place count 181 transition count 598
Drop transitions removed 19 transitions
Reduce isomorphic transitions removed 19 transitions.
Iterating post reduction 1 with 19 rules applied. Total rules applied 174 place count 181 transition count 579
Symmetric choice reduction at 2 with 18 rule applications. Total rules 192 place count 181 transition count 579
Deduced a syphon composed of 18 places in 2 ms
Reduce places removed 18 places and 18 transitions.
Iterating global reduction 2 with 36 rules applied. Total rules applied 228 place count 163 transition count 561
Performed 5 Post agglomeration using F-continuation condition.Transition count delta: 0
Deduced a syphon composed of 5 places in 2 ms
Reduce places removed 5 places and 0 transitions.
Iterating global reduction 2 with 10 rules applied. Total rules applied 238 place count 158 transition count 561
Free-agglomeration rule applied 12 times.
Iterating global reduction 2 with 12 rules applied. Total rules applied 250 place count 158 transition count 549
Reduce places removed 12 places and 0 transitions.
Iterating post reduction 2 with 12 rules applied. Total rules applied 262 place count 146 transition count 549
Free-agglomeration rule (complex) applied 1 times.
Iterating global reduction 3 with 1 rules applied. Total rules applied 263 place count 146 transition count 548
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 3 with 1 rules applied. Total rules applied 264 place count 145 transition count 548
Partial Free-agglomeration rule applied 20 times.
Drop transitions removed 20 transitions
Iterating global reduction 4 with 20 rules applied. Total rules applied 284 place count 145 transition count 548
Drop transitions removed 175 transitions
Redundant transition composition rules discarded 175 transitions
Iterating global reduction 4 with 175 rules applied. Total rules applied 459 place count 145 transition count 373
Free-agglomeration rule applied 5 times.
Iterating global reduction 4 with 5 rules applied. Total rules applied 464 place count 145 transition count 368
Reduce places removed 5 places and 0 transitions.
Iterating post reduction 4 with 5 rules applied. Total rules applied 469 place count 140 transition count 368
Applied a total of 469 rules in 344 ms. Remains 140 /243 variables (removed 103) and now considering 368/702 (removed 334) transitions.
Finished structural reductions, in 1 iterations. Remains : 140/243 places, 368/702 transitions.
Finished random walk after 50015 steps, including 0 resets, run visited all 4 properties in 328 ms. (steps per millisecond=152 )
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-13 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-08 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-04 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA FlexibleBarrier-PT-20a-ReachabilityFireability-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
All properties solved without resorting to model-checking.

--------------------
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="FlexibleBarrier-PT-20a"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="gold2020"
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 gold2020"
echo " Input is FlexibleBarrier-PT-20a, 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 r113-smll-162075355700068"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/FlexibleBarrier-PT-20a.tgz
mv FlexibleBarrier-PT-20a 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 ;