Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2021-input.r178-tajo-162089415400238.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2021-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
..................
=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is RERS17pb114-PT-6, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r178-tajo-162089415400238
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 73M
-rw-r--r-- 1 mcc users 15K May 5 16:58 CTLCardinality.txt
-rw-r--r-- 1 mcc users 135K May 10 09:44 CTLCardinality.xml
-rw-r--r-- 1 mcc users 23K May 5 16:58 CTLFireability.txt
-rw-r--r-- 1 mcc users 111K May 10 09:44 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 3.6K Mar 28 16:29 LTLCardinality.txt
-rw-r--r-- 1 mcc users 27K Mar 28 16:29 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6K Mar 28 16:29 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Mar 28 16:29 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.7K Mar 27 10:12 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 20K Mar 27 10:12 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.2K Mar 25 13:22 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 14K Mar 25 13:22 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Mar 22 08:14 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Mar 22 08:14 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 5 16:51 equiv_col
-rw-r--r-- 1 mcc users 2 May 5 16:51 instance
-rw-r--r-- 1 mcc users 6 May 5 16:51 iscolored
-rw-r--r-- 1 mcc users 73M 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 RERS17pb114-PT-6-ReachabilityCardinality-00
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-01
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-02
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-03
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-04
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-05
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-06
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-07
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-08
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-09
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-10
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-11
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-12
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-13
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-14
FORMULA_NAME RERS17pb114-PT-6-ReachabilityCardinality-15

=== Now, execution of the tool begins

BK_START 1621249608390

Running Version 0
[2021-05-17 11:06:50] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -spotpath, /home/mcc/BenchKit/bin//..//ltlfilt, -z3path, /home/mcc/BenchKit/bin//..//z3/bin/z3, -yices2path, /home/mcc/BenchKit/bin//..//yices/bin/yices, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2021-05-17 11:06:50] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2021-05-17 11:06:53] [INFO ] Load time of PNML (sax parser for PT used): 2330 ms
[2021-05-17 11:06:53] [INFO ] Transformed 1446 places.
[2021-05-17 11:06:53] [INFO ] Transformed 151085 transitions.
[2021-05-17 11:06:53] [INFO ] Parsed PT model containing 1446 places and 151085 transitions in 3055 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 19 ms.
Working with output stream class java.io.PrintStream
Incomplete random walk after 10000 steps, including 2 resets, run finished after 1244 ms. (steps per millisecond=8 ) properties (out of 16) seen :8
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-14 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-13 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-11 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-08 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-07 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-06 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 89 ms. (steps per millisecond=112 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 88 ms. (steps per millisecond=113 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 94 ms. (steps per millisecond=106 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 134 ms. (steps per millisecond=74 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 114 ms. (steps per millisecond=87 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 88 ms. (steps per millisecond=113 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 78 ms. (steps per millisecond=128 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 94 ms. (steps per millisecond=106 ) properties (out of 8) seen :0
Running SMT prover for 8 properties.
[2021-05-17 11:06:57] [INFO ] Flow matrix only has 84691 transitions (discarded 66394 similar events)
// Phase 1: matrix 84691 rows 1446 cols
[2021-05-17 11:06:58] [INFO ] Computed 35 place invariants in 647 ms
[2021-05-17 11:06:58] [INFO ] [Real]Absence check using 18 positive place invariants in 37 ms returned sat
[2021-05-17 11:06:58] [INFO ] [Real]Absence check using 18 positive and 17 generalized place invariants in 29 ms returned sat
[2021-05-17 11:06:58] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-17 11:07:21] [INFO ] [Real]Absence check using state equation in 22482 ms returned unsat :0 sat :1 real:7
[2021-05-17 11:07:26] [INFO ] State equation strengthened by 2342 read => feed constraints.
[2021-05-17 11:07:26] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
Fused 8 Parikh solutions to 1 different solutions.
Support contains 40 out of 1446 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 1446/1446 places, 151085/151085 transitions.
Ensure Unique test removed 17 places
Drop transitions removed 512 transitions
Reduce isomorphic transitions removed 512 transitions.
Iterating post reduction 0 with 529 rules applied. Total rules applied 529 place count 1429 transition count 150573
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 1 with 1 rules applied. Total rules applied 530 place count 1428 transition count 150572
Applied a total of 530 rules in 3744 ms. Remains 1428 /1446 variables (removed 18) and now considering 150572/151085 (removed 513) transitions.
Finished structural reductions, in 1 iterations. Remains : 1428/1446 places, 150572/151085 transitions.
[2021-05-17 11:07:36] [INFO ] Flatten gal took : 5060 ms
[2021-05-17 11:07:40] [INFO ] Flatten gal took : 4080 ms
[2021-05-17 11:07:40] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality14658912804288273045.gal : 415 ms
[2021-05-17 11:07:40] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality15996499183480816782.prop : 0 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality14658912804288273045.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality15996499183480816782.prop, --nowitness, --gen-order, FOLLOW], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality14658912804288273045.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality15996499183480816782.prop --nowitness --gen-order FOLLOW
Detected timeout of ITS tools.
[2021-05-17 11:08:01] [INFO ] Flatten gal took : 4613 ms
[2021-05-17 11:08:01] [INFO ] Applying decomposition
[2021-05-17 11:08:05] [INFO ] Flatten gal took : 4051 ms
Converted graph to binary with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/convert-linux64, -i, /tmp/graph6177816235319000465.txt, -o, /tmp/graph6177816235319000465.bin, -w, /tmp/graph6177816235319000465.weights], workingDir=null]
Built communities with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/louvain-linux64, /tmp/graph6177816235319000465.bin, -l, -1, -v, -w, /tmp/graph6177816235319000465.weights, -q, 0, -e, 0.001], workingDir=null]
[2021-05-17 11:08:16] [INFO ] Decomposing Gal with order
[2021-05-17 11:08:16] [INFO ] Rewriting arrays to variables to allow decomposition.
[2021-05-17 11:08:27] [INFO ] Removed a total of 456600 redundant transitions.
[2021-05-17 11:08:29] [INFO ] Flatten gal took : 7123 ms
[2021-05-17 11:09:01] [INFO ] Fuse similar labels procedure discarded/fused a total of 2812 labels/synchronizations in 22225 ms.
[2021-05-17 11:09:07] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality10455679288335651459.gal : 748 ms
[2021-05-17 11:09:07] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality10304134348419540178.prop : 3 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityCardinality10455679288335651459.gal, -t, CGAL, -reachable-file, /tmp/ReachabilityCardinality10304134348419540178.prop, --nowitness, --gen-order, FOLLOW], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityCardinality10455679288335651459.gal -t CGAL -reachable-file /tmp/ReachabilityCardinality10304134348419540178.prop --nowitness --gen-order FOLLOW
Loading property file /tmp/ReachabilityCardinality10304134348419540178.prop.
Detected timeout of ITS tools.
Built C files in :
/tmp/ltsmin3004371359163265349
[2021-05-17 11:09:23] [INFO ] Built C files in 1590ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin3004371359163265349
Running compilation step : CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin3004371359163265349]
WARNING : LTS min runner thread failed on error :java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin3004371359163265349] killed by timeout after 1 SECONDS
java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin3004371359163265349] killed by timeout after 1 SECONDS
at fr.lip6.move.gal.application.LTSminRunner$1.run(LTSminRunner.java:79)
at java.base/java.lang.Thread.run(Thread.java:834)
Interrupted random walk after 265627 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=8 ) properties seen :{0=1, 1=1, 3=1, 4=1, 6=1}
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-12 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-05 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-01 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-00 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Interrupted Best-First random walk after 568736 steps, including 1 resets, run timeout after 5001 ms. (steps per millisecond=113 ) properties seen :{0=1}
FORMULA RERS17pb114-PT-6-ReachabilityCardinality-04 FALSE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
Incomplete Best-First random walk after 1000000 steps, including 2 resets, run finished after 4562 ms. (steps per millisecond=219 ) properties (out of 2) seen :0
Interrupted Best-First random walk after 551030 steps, including 1 resets, run timeout after 5001 ms. (steps per millisecond=110 ) properties seen :{}
Running SMT prover for 2 properties.
[2021-05-17 11:10:11] [INFO ] Flow matrix only has 84689 transitions (discarded 65883 similar events)
// Phase 1: matrix 84689 rows 1428 cols
[2021-05-17 11:10:11] [INFO ] Computed 18 place invariants in 419 ms
[2021-05-17 11:10:13] [INFO ] [Real]Absence check using 18 positive place invariants in 13 ms returned sat
[2021-05-17 11:10:13] [INFO ] SMT Verify possible in real domain returnedunsat :0 sat :0 real:2
[2021-05-17 11:10:13] [INFO ] [Nat]Absence check using 18 positive place invariants in 72 ms returned sat
[2021-05-17 11:10:13] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-17 11:10:39] [INFO ] [Nat]Absence check using state equation in 26314 ms returned unsat :0 sat :2
[2021-05-17 11:10:42] [INFO ] State equation strengthened by 2277 read => feed constraints.
[2021-05-17 11:11:39] [WARNING] SMT solver failed with error :SMT solver raised an error when submitting script.... while checking expressions.
Fused 2 Parikh solutions to 1 different solutions.
Support contains 14 out of 1428 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 1428/1428 places, 150572/150572 transitions.
Applied a total of 0 rules in 1739 ms. Remains 1428 /1428 variables (removed 0) and now considering 150572/150572 (removed 0) transitions.
Finished structural reductions, in 1 iterations. Remains : 1428/1428 places, 150572/150572 transitions.
[2021-05-17 11:11:46] [INFO ] Flatten gal took : 3953 ms

BK_STOP 1621249911587

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

+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution ReachabilityCardinality -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ cut -d . -f 9
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202104292328.jar
+ VERSION=0
+ echo 'Running Version 0'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination ReachabilityCardinality -spotpath /home/mcc/BenchKit/bin//..//ltlfilt -z3path /home/mcc/BenchKit/bin//..//z3/bin/z3 -yices2path /home/mcc/BenchKit/bin//..//yices/bin/yices -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600 -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss128m -Xms40m -Xmx16000m

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="RERS17pb114-PT-6"
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 2-4028"
echo " Executing tool itstools"
echo " Input is RERS17pb114-PT-6, 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 r178-tajo-162089415400238"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/RERS17pb114-PT-6.tgz
mv RERS17pb114-PT-6 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 ;