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.r290-tajo-171654446600215.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 PolyORBLF-COL-S06J06T08, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r290-tajo-171654446600215
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 584K
-rw-r--r-- 1 mcc users 6.6K Apr 11 17:11 CTLCardinality.txt
-rw-r--r-- 1 mcc users 58K Apr 11 17:11 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.4K Apr 11 17:06 CTLFireability.txt
-rw-r--r-- 1 mcc users 54K Apr 11 17:06 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:43 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.3K May 18 16:43 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.6K Apr 23 07:44 LTLCardinality.txt
-rw-r--r-- 1 mcc users 28K Apr 23 07:44 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.5K Apr 23 07:44 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Apr 23 07:44 LTLFireability.xml
-rw-r--r-- 1 mcc users 15K Apr 11 17:42 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 128K Apr 11 17:42 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 6.5K Apr 11 17:37 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 45K Apr 11 17:37 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Apr 23 07:44 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Apr 23 07:44 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 18 16:43 equiv_pt
-rw-r--r-- 1 mcc users 10 May 18 16:43 instance
-rw-r--r-- 1 mcc users 5 May 18 16:43 iscolored
-rw-r--r-- 1 mcc users 154K 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 PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-00
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-01
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-02
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-03
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-04
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-05
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-06
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-07
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-08
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-09
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-10
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-11
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-12
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-13
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-14
FORMULA_NAME PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-15

=== Now, execution of the tool begins

BK_START 1716912474112

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=PolyORBLF-COL-S06J06T08
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is COL
ReachabilityFireability COL
Running Version 202405141337
[2024-05-28 16:07:55] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2024-05-28 16:07:55] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-28 16:07:55] [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.
[2024-05-28 16:07:56] [WARNING] Using fallBack plugin, rng conformance not checked
[2024-05-28 16:07:56] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 926 ms
[2024-05-28 16:07:56] [INFO ] Imported 81 HL places and 65 HL transitions for a total of 894 PT places and 14420.0 transition bindings in 32 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 14 ms.
Working with output stream class java.io.PrintStream
[2024-05-28 16:07:56] [INFO ] Built PT skeleton of HLPN with 81 places and 65 transitions 254 arcs in 5 ms.
[2024-05-28 16:07:56] [INFO ] Skeletonized 16 HLPN properties in 0 ms.
Remains 2 properties that can be checked using skeleton over-approximation.
Computed a total of 0 stabilizing places and 0 stable transitions
[2024-05-28 16:07:57] [INFO ] Flatten gal took : 45 ms
[2024-05-28 16:07:57] [INFO ] Flatten gal took : 8 ms
[2024-05-28 16:07:57] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality9787651055376529187.gal : 11 ms
RANDOM walk for 40005 steps (3911 resets) in 834 ms. (47 steps per ms) remains 2/2 properties
BEST_FIRST walk for 1195 steps (8 resets) in 20 ms. (56 steps per ms) remains 0/2 properties
[2024-05-28 16:07:57] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality12490461323595296759.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/ReachabilityCardinality9787651055376529187.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality12490461323595296759.prop' '--nowitness' '--gen-order' 'FOLLOW'

ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
RANDOM walk for 0 steps (0 resets) in 4 ms. (0 steps per ms) remains 0/0 properties
[2024-05-28 16:07:57] [INFO ] Flatten gal took : 8 ms
[2024-05-28 16:07:57] [INFO ] Flatten gal took : 6 ms
RANDOM walk for 0 steps (0 resets) in 4 ms. (0 steps per ms) remains 0/0 properties
Finished probabilistic random walk after 0 steps, run visited all 0 properties in 0 ms. (steps per millisecond=0 )
[2024-05-28 16:07:57] [INFO ] Flatten gal took : 6 ms
[2024-05-28 16:07:57] [INFO ] Flatten gal took : 5 ms
[2024-05-28 16:07:57] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality9640837528250935669.gal : 4 ms
[2024-05-28 16:07:57] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality9930763275471894905.prop : 0 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/ReachabilityCardinality9640837528250935669.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality9930763275471894905.prop' '--nowitness' '--gen-order' 'FOLLOW'

ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
Transition T_2315 forces synchronizations/join behavior on parameter t of sort Threads
Transition GoPerformWork forces synchronizations/join behavior on parameter j of sort Jobs
Transition T_0376 forces synchronizations/join behavior on parameter s of sort Sources
[2024-05-28 16:07:57] [INFO ] Unfolded HLPN to a Petri net with 894 places and 14334 transitions 119772 arcs in 247 ms.
[2024-05-28 16:07:57] [INFO ] Unfolded 16 HLPN properties in 4 ms.
[2024-05-28 16:07:57] [INFO ] Reduced 120 identical enabling conditions.
[2024-05-28 16:07:57] [INFO ] Reduced 9360 identical enabling conditions.
[2024-05-28 16:07:57] [INFO ] Reduced 120 identical enabling conditions.
[2024-05-28 16:07:57] [INFO ] Reduced 1280 identical enabling conditions.
Ensure Unique test removed 10760 transitions
Reduce redundant transitions removed 10760 transitions.
[2024-05-28 16:07:58] [INFO ] Flatten gal took : 726 ms
[2024-05-28 16:07:59] [INFO ] Flatten gal took : 478 ms
[2024-05-28 16:07:59] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality12972021980633617533.gal : 259 ms
[2024-05-28 16:07:59] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality1595534400330970615.prop : 113 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/ReachabilityCardinality12972021980633617533.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality1595534400330970615.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 ...329
RANDOM walk for 40000 steps (246 resets) in 8036 ms. (4 steps per ms) remains 6/16 properties
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-15 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-14 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-12 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-11 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-10 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-06 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-05 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Loading property file /tmp/ReachabilityCardinality1595534400330970615.prop.
BEST_FIRST walk for 40003 steps (76 resets) in 3299 ms. (12 steps per ms) remains 6/6 properties
BEST_FIRST walk for 40002 steps (145 resets) in 5193 ms. (7 steps per ms) remains 6/6 properties
BEST_FIRST walk for 40003 steps (25 resets) in 7632 ms. (5 steps per ms) remains 6/6 properties
BEST_FIRST walk for 40002 steps (122 resets) in 2444 ms. (16 steps per ms) remains 6/6 properties
BEST_FIRST walk for 40001 steps (34 resets) in 1779 ms. (22 steps per ms) remains 6/6 properties
SDD proceeding with computation,16 properties remain. new max is 4
SDD size :1 after 3
SDD proceeding with computation,16 properties remain. new max is 8
SDD size :3 after 6
SDD proceeding with computation,16 properties remain. new max is 16
SDD size :6 after 7
BEST_FIRST walk for 40002 steps (124 resets) in 3885 ms. (10 steps per ms) remains 6/6 properties
[2024-05-28 16:08:07] [INFO ] Flow matrix only has 3526 transitions (discarded 48 similar events)
// Phase 1: matrix 3526 rows 894 cols
SDD proceeding with computation,16 properties remain. new max is 32
SDD size :7 after 12
SDD proceeding with computation,16 properties remain. new max is 64
SDD size :12 after 13
SDD proceeding with computation,16 properties remain. new max is 128
SDD size :13 after 14
SDD proceeding with computation,16 properties remain. new max is 256
SDD size :14 after 15
[2024-05-28 16:08:08] [INFO ] Computed 62 invariants in 470 ms
[2024-05-28 16:08:08] [INFO ] State equation strengthened by 224 read => feed constraints.
SDD proceeding with computation,16 properties remain. new max is 512
SDD size :15 after 25
SDD proceeding with computation,16 properties remain. new max is 1024
SDD size :25 after 29
SDD proceeding with computation,16 properties remain. new max is 2048
SDD size :29 after 53
SDD proceeding with computation,16 properties remain. new max is 4096
SDD size :53 after 101
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/693 variables, 5/5 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/693 variables, 19/24 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/693 variables, 0/24 constraints. Problems are: Problem set: 0 solved, 6 unsolved
At refinement iteration 3 (OVERLAPS) 95/788 variables, 18/42 constraints. Problems are: Problem set: 0 solved, 6 unsolved
Problem PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-08 is UNSAT
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-08 FALSE TECHNIQUES SMT_REFINEMENT
At refinement iteration 4 (INCLUDED_ONLY) 0/788 variables, 3/45 constraints. Problems are: Problem set: 1 solved, 5 unsolved
At refinement iteration 5 (INCLUDED_ONLY) 0/788 variables, 0/45 constraints. Problems are: Problem set: 1 solved, 5 unsolved
Problem PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-00 is UNSAT
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-00 TRUE TECHNIQUES SMT_REFINEMENT
Problem PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-01 is UNSAT
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-01 TRUE TECHNIQUES SMT_REFINEMENT
Problem PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-04 is UNSAT
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-04 TRUE TECHNIQUES SMT_REFINEMENT
Problem PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-07 is UNSAT
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-07 FALSE TECHNIQUES SMT_REFINEMENT
Problem PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-13 is UNSAT
FORMULA PolyORBLF-COL-S06J06T08-ReachabilityFireability-2024-13 FALSE TECHNIQUES SMT_REFINEMENT
After SMT solving in domain Real declared 894/4420 variables, and 62 constraints, problems are : Problem set: 6 solved, 0 unsolved in 3790 ms.
Refiners :[Positive P Invariants (semi-flows): 23/23 constraints, Generalized P Invariants (flows): 39/39 constraints, State Equation: 0/894 constraints, ReadFeed: 0/224 constraints, PredecessorRefiner: 6/1 constraints, Known Traps: 0/0 constraints]
After SMT, in 18887ms problems are : Problem set: 6 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.
All properties solved without resorting to model-checking.
Total runtime 30934 ms.

BK_STOP 1716912506663

--------------------
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
+ [[ ReachabilityFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution ReachabilityFireability -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//
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202405141337.jar
++ perl -pe 's/.*\.//g'
+ VERSION=202405141337
+ echo 'Running Version 202405141337'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityFireability -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="PolyORBLF-COL-S06J06T08"
export BK_EXAMINATION="ReachabilityFireability"
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 PolyORBLF-COL-S06J06T08, 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 r290-tajo-171654446600215"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/PolyORBLF-COL-S06J06T08.tgz
mv PolyORBLF-COL-S06J06T08 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 ;