Execution Chart

Sorry, for this execution, no execution chart could be reported.

Trace from the execution

Formatting '/data/fkordon/mcc2025-input.r156-tall-174881253900367.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2025-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5832
Executing tool itstools
Input is PolyORBLF-COL-S06J04T04, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r156-tall-174881253900367
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 608K
-rw-r--r-- 1 mcc users 7.4K May 29 14:47 CTLCardinality.txt
-rw-r--r-- 1 mcc users 62K May 29 14:47 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.8K May 29 14:47 CTLFireability.txt
-rw-r--r-- 1 mcc users 58K May 29 14:47 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 29 14:32 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.3K May 29 14:32 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.8K May 29 14:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 29K May 29 14:47 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6K May 29 14:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K May 29 14:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 12K May 29 14:47 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 94K May 29 14:47 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 12K May 29 14:47 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 89K May 29 14:47 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K May 29 14:47 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K May 29 14:47 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 29 14:32 equiv_pt
-rw-r--r-- 1 mcc users 10 May 29 14:32 instance
-rw-r--r-- 1 mcc users 5 May 29 14:32 iscolored
-rw-r--r-- 1 mcc users 154K May 29 14:32 model.pnml

--------------------
content from stdout:

=== Data for post analysis generated by BenchKit (invocation template)

The expected result is a vector of booleans
BOOL_VECTOR

echo here is the order used to build the result vector(from xml file)
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-00
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-01
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-02
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-03
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-04
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-05
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-06
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-07
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-08
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-09
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-10
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-11
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-12
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-13
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-14
FORMULA_NAME PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-15

=== Now, execution of the tool begins

BK_START 1748952038895

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-S06J04T04
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is COL
ReachabilityFireability COL
Running Version 202505121319
[2025-06-03 12:00:40] [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]
[2025-06-03 12:00:40] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2025-06-03 12:00:40] [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.
[2025-06-03 12:00:40] [WARNING] Using fallBack plugin, rng conformance not checked
[2025-06-03 12:00:40] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 625 ms
[2025-06-03 12:00:40] [INFO ] Imported 81 HL places and 65 HL transitions for a total of 454 PT places and 7036.0 transition bindings in 24 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 21 ms.
Reduction of identical properties reduced properties to check from 16 to 15
Working with output stream class java.io.PrintStream
[2025-06-03 12:00:40] [INFO ] Built PT skeleton of HLPN with 81 places and 65 transitions 254 arcs in 5 ms.
[2025-06-03 12:00:40] [INFO ] Skeletonized 15 HLPN properties in 2 ms.
Remains 2 properties that can be checked using skeleton over-approximation.
Computed a total of 0 stabilizing places and 0 stable transitions
[2025-06-03 12:00:41] [INFO ] Flatten gal took : 63 ms
[2025-06-03 12:00:41] [INFO ] Flatten gal took : 20 ms
RANDOM walk for 30221 steps (2954 resets) in 339 ms. (88 steps per ms) remains 0/2 properties
[2025-06-03 12:00:41] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality15810087694729343545.gal : 13 ms
[2025-06-03 12:00:41] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality1275274120004523005.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality15810087694729343545.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality1275274120004523005.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_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Loading property file /tmp/ReachabilityCardinality1275274120004523005.prop.
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
[2025-06-03 12:00:41] [INFO ] Flatten gal took : 10 ms
[2025-06-03 12:00:41] [INFO ] Flatten gal took : 7 ms
RANDOM walk for 0 steps (0 resets) in 5 ms. (0 steps per ms) remains 0/0 properties
[2025-06-03 12:00:41] [INFO ] Flatten gal took : 8 ms
Finished probabilistic random walk after 0 steps, run visited all 0 properties in 0 ms. (steps per millisecond=0 )
[2025-06-03 12:00:41] [INFO ] Flatten gal took : 8 ms
[2025-06-03 12:00:41] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality15052355180691046841.gal : 4 ms
[2025-06-03 12:00:41] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality2026880757323065610.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality15052355180691046841.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality2026880757323065610.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
ITS runner timed out or was interrupted.
Loading property file /tmp/ReachabilityCardinality2026880757323065610.prop.
ITS tools runner thread asked to quit. Dying gracefully.
Transition T_0376 forces synchronizations/join behavior on parameter s of sort Sources
Transition GoPerformWork forces synchronizations/join behavior on parameter j of sort Jobs
Transition T_2315 forces synchronizations/join behavior on parameter t of sort Threads
[2025-06-03 12:00:41] [INFO ] Unfolded HLPN to a Petri net with 454 places and 6994 transitions 59152 arcs in 139 ms.
[2025-06-03 12:00:41] [INFO ] Unfolded 15 HLPN properties in 5 ms.
[2025-06-03 12:00:41] [INFO ] Reduced 640 identical enabling conditions.
[2025-06-03 12:00:41] [INFO ] Reduced 640 identical enabling conditions.
[2025-06-03 12:00:41] [INFO ] Reduced 60 identical enabling conditions.
[2025-06-03 12:00:41] [INFO ] Reduced 640 identical enabling conditions.
[2025-06-03 12:00:41] [INFO ] Reduced 4680 identical enabling conditions.
[2025-06-03 12:00:41] [INFO ] Reduced 4680 identical enabling conditions.
[2025-06-03 12:00:41] [INFO ] Reduced 60 identical enabling conditions.
[2025-06-03 12:00:41] [INFO ] Reduced 4680 identical enabling conditions.
[2025-06-03 12:00:41] [INFO ] Reduced 60 identical enabling conditions.
Ensure Unique test removed 5380 transitions
Reduce redundant transitions removed 5380 transitions.
[2025-06-03 12:00:42] [INFO ] Flatten gal took : 391 ms
RANDOM walk for 40000 steps (238 resets) in 2592 ms. (15 steps per ms) remains 5/15 properties
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-15 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-14 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-13 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-12 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-10 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-08 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-04 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-02 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-01 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
[2025-06-03 12:00:42] [INFO ] Flatten gal took : 292 ms
[2025-06-03 12:00:42] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality2513269729719928530.gal : 79 ms
[2025-06-03 12:00:42] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality17116073069913869131.prop : 40 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality2513269729719928530.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality17116073069913869131.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Loading property file /tmp/ReachabilityCardinality17116073069913869131.prop.
BEST_FIRST walk for 40000 steps (1140 resets) in 4426 ms. (9 steps per ms) remains 5/5 properties
SDD proceeding with computation,5 properties remain. new max is 4
SDD size :1 after 3
SDD proceeding with computation,5 properties remain. new max is 8
SDD size :3 after 6
SDD proceeding with computation,5 properties remain. new max is 16
SDD size :6 after 7
SDD proceeding with computation,5 properties remain. new max is 32
SDD size :7 after 12
SDD proceeding with computation,5 properties remain. new max is 64
SDD size :12 after 13
SDD proceeding with computation,5 properties remain. new max is 128
SDD size :13 after 15
SDD proceeding with computation,5 properties remain. new max is 256
SDD size :15 after 27
BEST_FIRST walk for 40001 steps (101 resets) in 4874 ms. (8 steps per ms) remains 5/5 properties
SDD proceeding with computation,5 properties remain. new max is 512
SDD size :27 after 51
SDD proceeding with computation,5 properties remain. new max is 1024
SDD size :51 after 97
BEST_FIRST walk for 40003 steps (479 resets) in 1556 ms. (25 steps per ms) remains 5/5 properties
SDD proceeding with computation,5 properties remain. new max is 2048
SDD size :97 after 126
BEST_FIRST walk for 40003 steps (305 resets) in 2980 ms. (13 steps per ms) remains 5/5 properties
BEST_FIRST walk for 40003 steps (140 resets) in 1792 ms. (22 steps per ms) remains 5/5 properties
[2025-06-03 12:00:46] [INFO ] Flow matrix only has 1590 transitions (discarded 24 similar events)
// Phase 1: matrix 1590 rows 454 cols
[2025-06-03 12:00:46] [INFO ] Computed 50 invariants in 84 ms
[2025-06-03 12:00:46] [INFO ] State equation strengthened by 112 read => feed constraints.
Excessive predecessor constraint size, skipping predecessor.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
SDD proceeding with computation,5 properties remain. new max is 4096
SDD size :126 after 2832
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/442 variables, 19/19 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 1 (INCLUDED_ONLY) 0/442 variables, 24/43 constraints. Problems are: Problem set: 0 solved, 5 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/442 variables, 0/43 constraints. Problems are: Problem set: 0 solved, 5 unsolved
Problem PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-00 is UNSAT
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-00 FALSE TECHNIQUES SMT_REFINEMENT
Problem PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-05 is UNSAT
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-05 TRUE TECHNIQUES SMT_REFINEMENT
Problem PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-06 is UNSAT
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-06 FALSE TECHNIQUES SMT_REFINEMENT
Problem PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-07 is UNSAT
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-07 TRUE TECHNIQUES SMT_REFINEMENT
Problem PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-11 is UNSAT
FORMULA PolyORBLF-COL-S06J04T04-ReachabilityFireability-2025-11 TRUE TECHNIQUES SMT_REFINEMENT
After SMT solving in domain Real declared 454/2044 variables, and 50 constraints, problems are : Problem set: 5 solved, 0 unsolved in 2002 ms.
Refiners :[Positive P Invariants (semi-flows): 19/19 constraints, Generalized P Invariants (flows): 31/31 constraints, State Equation: 0/454 constraints, ReadFeed: 0/112 constraints, PredecessorRefiner: 5/0 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 2181ms problems are : Problem set: 5 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 8824 ms.

BK_STOP 1748952048932

--------------------
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
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202505121319.jar
+ VERSION=202505121319
+ echo 'Running Version 202505121319'
+ /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-S06J04T04"
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 2-5832"
echo " Executing tool itstools"
echo " Input is PolyORBLF-COL-S06J04T04, 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 r156-tall-174881253900367"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/PolyORBLF-COL-S06J04T04.tgz
mv PolyORBLF-COL-S06J04T04 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.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 ;