Execution Chart

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

Trace from the execution

Waiting for the VM to be ready (probing ssh)
..........................
/home/mcc/execution
total 176K
-rw-r--r-- 1 mcc users 2.9K May 15 18:54 CTLCardinality.txt
-rw-r--r-- 1 mcc users 16K May 15 18:54 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.8K May 15 18:54 CTLFireability.txt
-rw-r--r-- 1 mcc users 23K May 15 18:54 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K May 15 18:49 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.2K May 15 18:49 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 2.2K May 15 18:54 LTLCardinality.txt
-rw-r--r-- 1 mcc users 9.4K May 15 18:54 LTLCardinality.xml
-rw-r--r-- 1 mcc users 1.9K May 15 18:54 LTLFireability.txt
-rw-r--r-- 1 mcc users 11K May 15 18:54 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.1K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 15K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 108 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 346 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 2.5K May 15 18:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 15K May 15 18:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K May 15 18:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K May 15 18:54 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 15 18:49 equiv_col
-rw-r--r-- 1 mcc users 4 May 15 18:49 instance
-rw-r--r-- 1 mcc users 6 May 15 18:49 iscolored
-rw-r--r-- 1 mcc users 16K May 15 18:49 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool itstoolsl
Input is AutoFlight-PT-02a, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r021-qhx1-152646246200065
=====================================================================

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

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

The expected result is a vector of positive values
NUM_VECTOR

here is the order used to build the result vector(from text file)
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-00
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-01
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-02
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-03
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-04
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-05
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-06
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-07
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-08
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-09
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-10
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-11
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-12
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-13
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-14
FORMULA_NAME AutoFlight-PT-02a-UpperBounds-15

=== Now, execution of the tool begins

BK_START 1527222470417

Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805241334/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /home/mcc/execution/UpperBounds.pnml.gal, -t, CGAL, -reachable-file, UpperBounds.prop, --nowitness], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805241334/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /home/mcc/execution/UpperBounds.pnml.gal -t CGAL -reachable-file UpperBounds.prop --nowitness
Loading property file UpperBounds.prop.
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-00 with value :u5.p12
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-01 with value :u11.p26
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-02 with value :u11.p24
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-03 with value :u13.p48
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-04 with value :u11.p26
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-05 with value :u11.p31
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-06 with value :u16.p0
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-07 with value :u2.p5
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-08 with value :u4.p9
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-09 with value :u16.p0
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-10 with value :u4.p10
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-11 with value :u14.p52
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-12 with value :u14.p54
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-13 with value :u13.p48
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-14 with value :u14.p51
Read [bounds] property : AutoFlight-PT-02a-UpperBounds-15 with value :u11.p23
built 21 ordering constraints for composite.
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight\_PT\_02a\_flat\_flat\_flat\_mod,6949,0.053531,4308,91,43,897,355,144,856,72,916,0
Total reachable state count : 6949

Verifying 16 reachability properties.
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-00 :0 <= u5.p12 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-00 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-00,0,0.055795,4340,1,0,897,355,250,856,91,916,265
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-01 :0 <= u11.p26 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-01 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-01,0,0.056345,4404,1,0,897,355,293,856,108,916,298
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-02 :0 <= u11.p24 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-02 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-02,0,0.056832,4404,1,0,897,355,311,856,129,916,330
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-03 :0 <= u13.p48 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-03 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-03,0,0.057885,4404,1,0,897,355,339,856,129,916,387
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-04 :0 <= u11.p26 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-04 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-04,0,0.058294,4404,1,0,897,355,339,856,129,916,387
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-05 :0 <= u11.p31 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-05 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-05,0,0.058736,4404,1,0,897,355,357,856,136,916,419
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-06 :0 <= u16.p0 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-06 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-06,0,0.05914,4404,1,0,897,355,383,856,140,916,459
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-07 :0 <= u2.p5 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-07 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-07,0,0.059567,4404,1,0,897,355,406,856,140,916,484
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-08 :0 <= u4.p9 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-08 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-08,0,0.060216,4404,1,0,897,355,430,856,140,916,521
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-09 :0 <= u16.p0 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-09 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-09,0,0.060623,4404,1,0,897,355,430,856,140,916,521
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-10 :0 <= u4.p10 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-10 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-10,0,0.061241,4404,1,0,897,355,455,856,147,916,545
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-11 :0 <= u14.p52 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-11 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-11,0,0.061891,4404,1,0,897,355,490,856,147,916,600
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-12 :0 <= u14.p54 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-12 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-12,0,0.06247,4404,1,0,897,355,521,856,147,916,639
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-13 :0 <= u13.p48 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-13 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-13,0,0.062813,4404,1,0,897,355,521,856,147,916,639
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-14 :0 <= u14.p51 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-14 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-14,0,0.063364,4404,1,0,897,355,553,856,153,916,645
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property AutoFlight-PT-02a-UpperBounds-15 :0 <= u11.p23 <= 1
FORMULA AutoFlight-PT-02a-UpperBounds-15 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
AutoFlight-PT-02a-UpperBounds-15,0,0.063916,4404,1,0,897,355,571,856,165,916,677

BK_STOP 1527222493156

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

+ export BINDIR=/home/mcc/BenchKit/
+ BINDIR=/home/mcc/BenchKit/
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ /home/mcc/BenchKit//runeclipse.sh /home/mcc/execution UpperBounds -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -louvain -smt
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ /home/mcc/BenchKit//itstools/its-tools -consoleLog -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination UpperBounds -z3path /home/mcc/BenchKit//z3/bin/z3 -yices2path /home/mcc/BenchKit//yices/bin/yices -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -louvain -smt -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss8m -Xms40m -Xmx8192m -Dfile.encoding=UTF-8 -Dosgi.requiredJavaVersion=1.6
May 25, 2018 4:28:10 AM fr.lip6.move.gal.application.Application start
INFO: Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, UpperBounds, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -its, -ltsminpath, /home/mcc/BenchKit//lts_install_dir/, -louvain, -smt]
May 25, 2018 4:28:10 AM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /home/mcc/execution/model.pnml
May 25, 2018 4:28:10 AM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 69 ms
May 25, 2018 4:28:10 AM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 57 places.
May 25, 2018 4:28:11 AM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 55 transitions.
May 25, 2018 4:28:11 AM fr.lip6.move.gal.pnml.togal.PnmlToGalTransformer transform
INFO: Found NUPN structural information;
May 25, 2018 4:28:11 AM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/model.pnml.img.gal : 20 ms
May 25, 2018 4:28:11 AM fr.lip6.move.gal.application.MccTranslator applyOrder
INFO: Applying decomposition
May 25, 2018 4:28:11 AM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 79 ms
May 25, 2018 4:28:11 AM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 41 ms
May 25, 2018 4:28:11 AM fr.lip6.move.gal.instantiate.CompositeBuilder decomposeWithOrder
INFO: Decomposing Gal with order
May 25, 2018 4:28:11 AM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 20 ms
May 25, 2018 4:28:11 AM fr.lip6.move.gal.instantiate.CompositeBuilder rewriteArraysToAllowPartition
INFO: Rewriting arrays to variables to allow decomposition.
May 25, 2018 4:28:11 AM fr.lip6.move.gal.instantiate.Instantiator fuseIsomorphicEffects
INFO: Removed a total of 12 redundant transitions.
May 25, 2018 4:28:11 AM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/UpperBounds.pnml.gal : 5 ms
May 25, 2018 4:28:11 AM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSTools
INFO: Time to serialize properties into /home/mcc/execution/UpperBounds.prop : 1 ms

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="AutoFlight-PT-02a"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="itstoolsl"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"

# 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

tar xzf /home/mcc/BenchKit/INPUTS/AutoFlight-PT-02a.tgz
mv AutoFlight-PT-02a execution
cd execution
pwd
ls -lh

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-3637"
echo " Executing tool itstoolsl"
echo " Input is AutoFlight-PT-02a, examination is UpperBounds"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r021-qhx1-152646246200065"
echo "====================================================================="
echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "UpperBounds" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "UpperBounds" != "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 "UpperBounds.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property UpperBounds.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "UpperBounds.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 '' UpperBounds.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
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 ;