Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2024-input.r048-tajo-171620398900158.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2024-input.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5568
Executing tool itstools
Input is BridgeAndVehicles-COL-V80P50N50, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r048-tajo-171620398900158
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 616K
-rw-r--r-- 1 mcc users 8.1K Apr 13 03:40 CTLCardinality.txt
-rw-r--r-- 1 mcc users 74K Apr 13 03:40 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.7K Apr 13 03:29 CTLFireability.txt
-rw-r--r-- 1 mcc users 40K Apr 13 03:29 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:42 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.4K May 18 16:42 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.2K Apr 22 14:30 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Apr 22 14:30 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.7K Apr 22 14:30 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Apr 22 14:30 LTLFireability.xml
-rw-r--r-- 1 mcc users 20K Apr 13 06:42 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 201K Apr 13 06:42 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 13K Apr 13 06:26 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 93K Apr 13 06:26 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K Apr 22 14:30 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.0K Apr 22 14:30 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 18 16:42 equiv_pt
-rw-r--r-- 1 mcc users 10 May 18 16:42 instance
-rw-r--r-- 1 mcc users 5 May 18 16:42 iscolored
-rw-r--r-- 1 mcc users 47K May 18 16:42 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 BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-00
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-01
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-02
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-03
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-04
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-05
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-06
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-07
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-08
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-09
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-10
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-11
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-12
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-13
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-14
FORMULA_NAME BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-15

=== Now, execution of the tool begins

BK_START 1716325508266

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=BridgeAndVehicles-COL-V80P50N50
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is COL
ReachabilityCardinality COL
Running Version 202405141337
[2024-05-21 21:05:09] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2024-05-21 21:05:09] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-21 21:05:10] [INFO ] Detected file is not PT type :http://www.pnml.org/version-2009/grammar/symmetricnet
log4j:WARN No appenders could be found for logger (org.apache.axiom.locator.DefaultOMMetaFactoryLocator).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[2024-05-21 21:05:10] [WARNING] Using fallBack plugin, rng conformance not checked
[2024-05-21 21:05:10] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 852 ms
[2024-05-21 21:05:11] [INFO ] Imported 15 HL places and 11 HL transitions for a total of 228 PT places and 1339138.0 transition bindings in 46 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 55 ms.
Working with output stream class java.io.PrintStream
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-13 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2024-05-21 21:05:11] [INFO ] Built PT skeleton of HLPN with 15 places and 11 transitions 56 arcs in 14 ms.
[2024-05-21 21:05:11] [INFO ] Skeletonized 15 HLPN properties in 1 ms.
Remains 15 properties that can be checked using skeleton over-approximation.
Reduce places removed 3 places and 0 transitions.
Computed a total of 9 stabilizing places and 6 stable transitions
Graph (complete) has 22 edges and 12 vertex of which 10 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.10 ms
Ensure Unique test removed 1 transitions
Reduce redundant transitions removed 1 transitions.
[2024-05-21 21:05:11] [INFO ] Flatten gal took : 128 ms
[2024-05-21 21:05:11] [INFO ] Flatten gal took : 64 ms
[2024-05-21 21:05:11] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality8252819295988750788.gal : 4 ms
[2024-05-21 21:05:11] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality2074867595238342256.prop : 14 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202405141337/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality8252819295988750788.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality2074867595238342256.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202405141337/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...328
Loading property file /tmp/ReachabilityCardinality2074867595238342256.prop.
SDD proceeding with computation,11 properties remain. new max is 4
SDD size :1 after 5
SDD proceeding with computation,11 properties remain. new max is 8
SDD size :5 after 10
SDD proceeding with computation,11 properties remain. new max is 16
SDD size :10 after 19
Reachability property BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-02 is true.
SDD proceeding with computation,10 properties remain. new max is 16
SDD size :19 after 36
SDD proceeding with computation,10 properties remain. new max is 32
SDD size :36 after 53
SDD proceeding with computation,10 properties remain. new max is 64
SDD size :53 after 486
Invariant property BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-03 does not hold.
Reachability property BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-01 is true.
SDD proceeding with computation,8 properties remain. new max is 64
SDD size :486 after 5751
RANDOM walk for 40000 steps (8 resets) in 2830 ms. (14 steps per ms) remains 5/11 properties
BEST_FIRST walk for 40002 steps (8 resets) in 683 ms. (58 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40003 steps (8 resets) in 369 ms. (108 steps per ms) remains 4/5 properties
BEST_FIRST walk for 40003 steps (8 resets) in 818 ms. (48 steps per ms) remains 4/4 properties
BEST_FIRST walk for 40000 steps (8 resets) in 261 ms. (152 steps per ms) remains 4/4 properties
BEST_FIRST walk for 40003 steps (8 resets) in 140 ms. (283 steps per ms) remains 4/4 properties
// Phase 1: matrix 10 rows 12 cols
[2024-05-21 21:05:12] [INFO ] Computed 4 invariants in 3 ms
Problem BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-00 is UNSAT
Problem BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-04 is UNSAT
Problem BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-12 is UNSAT
Problem BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-14 is UNSAT
After SMT solving in domain Real declared 12/22 variables, and 4 constraints, problems are : Problem set: 4 solved, 0 unsolved in 205 ms.
Refiners :[Positive P Invariants (semi-flows): 4/4 constraints, State Equation: 0/12 constraints, PredecessorRefiner: 4/4 constraints, Known Traps: 0/0 constraints]
After SMT, in 289ms problems are : Problem set: 4 solved, 0 unsolved
Skipping Parikh replay, no witness traces provided.
ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
RANDOM walk for 0 steps (0 resets) in 5 ms. (0 steps per ms) remains 0/0 properties
[2024-05-21 21:05:13] [INFO ] Flatten gal took : 12 ms
[2024-05-21 21:05:13] [INFO ] Flatten gal took : 2 ms
RANDOM walk for 0 steps (0 resets) in 4 ms. (0 steps per ms) remains 0/0 properties
[2024-05-21 21:05:13] [INFO ] Flatten gal took : 3 ms
[2024-05-21 21:05:13] [INFO ] Flatten gal took : 3 ms
[2024-05-21 21:05:13] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality16431800751095056879.gal : 1 ms
Finished probabilistic random walk after 0 steps, run visited all 0 properties in 0 ms. (steps per millisecond=0 )
[2024-05-21 21:05:13] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality254650452098606750.prop : 1 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202405141337/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality16431800751095056879.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality254650452098606750.prop' '--nowitness' '--gen-order' 'FOLLOW'

ITS runner timed out or was interrupted.
its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202405141337/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...328
Loading property file /tmp/ReachabilityCardinality254650452098606750.prop.
Found states matching all0 target predicate
Will report total states built up to this point. Computation was interrupted after 3 fixpoint passes
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
petri\_inst\_inst,5,0.0037,3544,2,21,5,62,6,0,54,27,0
Total reachable state count : 5

ITS tools runner thread asked to quit. Dying gracefully.
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-00 FALSE TECHNIQUES CPN_APPROX
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-04 TRUE TECHNIQUES CPN_APPROX
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-05 FALSE TECHNIQUES CPN_APPROX
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-08 TRUE TECHNIQUES CPN_APPROX
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-10 FALSE TECHNIQUES CPN_APPROX
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-11 FALSE TECHNIQUES CPN_APPROX
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-12 TRUE TECHNIQUES CPN_APPROX
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-14 TRUE TECHNIQUES CPN_APPROX
Arc [1:1*[(MOD (ADD $cA 1) 81)]] contains successor/predecessor on variables of sort voitureA
Arc [6:1*[(MOD (ADD (MOD (MINUS $cB 1) 81) 81) 81)]] contains successor/predecessor on variables of sort voitureB
Arc [13:1*[(MOD (ADD $cpt 1) 51)]] contains successor/predecessor on variables of sort compteur
Arc [14:1*[(MOD (ADD $s 1) 2)]] contains successor/predecessor on variables of sort sens
[2024-05-21 21:05:13] [INFO ] Unfolded HLPN to a Petri net with 228 places and 8588 transitions 67470 arcs in 363 ms.
[2024-05-21 21:05:13] [INFO ] Unfolded 15 HLPN properties in 3 ms.
[2024-05-21 21:05:15] [INFO ] Flatten gal took : 1131 ms
RANDOM walk for 40000 steps (56 resets) in 6151 ms. (6 steps per ms) remains 1/7 properties
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-15 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-07 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-06 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-03 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
BEST_FIRST walk for 4522 steps (0 resets) in 112 ms. (40 steps per ms) remains 0/1 properties
FORMULA BridgeAndVehicles-COL-V80P50N50-ReachabilityCardinality-2024-09 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
[2024-05-21 21:05:15] [INFO ] Flatten gal took : 495 ms
[2024-05-21 21:05:15] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality14370437537982240662.gal : 142 ms
[2024-05-21 21:05:15] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality7779572436794989341.prop : 1 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202405141337/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality14370437537982240662.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality7779572436794989341.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :
ITS runner timed out or was interrupted.

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202405141337/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
ITS tools runner thread asked to quit. Dying gracefully.
All properties solved without resorting to model-checking.
Total runtime 6099 ms.

BK_STOP 1716325516200

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

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution ReachabilityCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ 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//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202405141337.jar
+ VERSION=202405141337
+ echo 'Running Version 202405141337'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600

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="BridgeAndVehicles-COL-V80P50N50"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="itstools"
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 itstools"
echo " Input is BridgeAndVehicles-COL-V80P50N50, 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 r048-tajo-171620398900158"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/BridgeAndVehicles-COL-V80P50N50.tgz
mv BridgeAndVehicles-COL-V80P50N50 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 ;