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 196K
-rw-r--r-- 1 mcc users 4.5K May 15 18:54 CTLCardinality.txt
-rw-r--r-- 1 mcc users 21K May 15 18:54 CTLCardinality.xml
-rw-r--r-- 1 mcc users 3.2K May 15 18:54 CTLFireability.txt
-rw-r--r-- 1 mcc users 18K May 15 18:54 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K May 15 18:50 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.3K May 15 18:50 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 2.8K May 15 18:54 LTLCardinality.txt
-rw-r--r-- 1 mcc users 9.9K May 15 18:54 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K May 15 18:54 LTLFireability.txt
-rw-r--r-- 1 mcc users 9.7K May 15 18:54 LTLFireability.xml
-rw-r--r-- 1 mcc users 4.3K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 18K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 127 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 365 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 3.4K May 15 18:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 17K May 15 18:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.1K May 15 18:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.1K May 15 18:54 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 15 18:50 equiv_col
-rw-r--r-- 1 mcc users 13 May 15 18:50 instance
-rw-r--r-- 1 mcc users 6 May 15 18:50 iscolored
-rw-r--r-- 1 mcc users 8.2K May 15 18:50 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool itstoolsl
Input is SmallOperatingSystem-PT-MT0128DC0032, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r165-smll-152705516100038
=====================================================================

--------------------
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 SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-00
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-01
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-02
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-03
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-04
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-05
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-06
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-07
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-08
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-09
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-10
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-11
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-12
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-13
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-14
FORMULA_NAME SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-15

=== Now, execution of the tool begins

BK_START 1527320007339

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

its-ctl command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805241334/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /home/mcc/execution/CTLCardinality.pnml.gal -t CGAL -ctl /home/mcc/execution/CTLCardinality.ctl
No direction supplied, using forward translation only.
Parsed 16 CTL formulae.
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
reachable,1.13321e+08,1.43435,21908,2,1578,5,80603,6,0,47,84929,0


Converting to forward existential form...Done !
original formula: EF(((FreeMemSegment<=TaskSuspended)&&(TaskReady<=DiskControllerUnit)))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * ((FreeMemSegment<=TaskSuspended)&&(TaskReady<=DiskControllerUnit)))] != FALSE
(forward)formula 0,1,1.6725,21908,1,0,7,80603,8,1,536,84929,1
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-00 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

***************************************

original formula: EF(!((((LoadingMem<=FreeMemSegment)&&(ExecutingTask<=DiskControllerUnit))||((FreeMemSegment>=2)||(TransferToDisk>=3)))))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !((((LoadingMem<=FreeMemSegment)&&(ExecutingTask<=DiskControllerUnit))||((FreeMemSegment>=2)||(TransferToDisk>=3)))))] != FALSE
(forward)formula 1,1,1.99201,21908,1,0,10,80603,10,3,872,84929,2
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-01 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

***************************************

original formula: (((TransferToDisk>=2)&&(((CPUUnit>=1)&&(!(TaskSuspended>=2)))||(CPUUnit<=TaskSuspended))) + AG(AF((CPUUnit>=1))))
=> equivalent forward existential formula: [FwdG(FwdU((Init * !(((TransferToDisk>=2)&&(((CPUUnit>=1)&&(!(TaskSuspended>=2)))||(CPUUnit<=TaskSuspended))))),TRUE),!((CPUUnit>=1)))] = FALSE
Hit Full ! (commute/partial/dont) 5/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
Hit Full ! (commute/partial/dont) 0/0/3
(forward)formula 2,0,3.89277,37736,1,0,12,149056,26,3,1348,155850,13
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-02 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: AG(!(((CPUUnit<=TaskSuspended)&&(DiskControllerUnit>=1))))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * ((CPUUnit<=TaskSuspended)&&(DiskControllerUnit>=1)))] = FALSE
(forward)formula 3,0,3.91894,38528,1,0,14,150316,27,4,1604,157565,14
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-03 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: !(EF((FreeMemSegment<=TaskSuspended)))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * (FreeMemSegment<=TaskSuspended))] = FALSE
(forward)formula 4,0,3.95138,38792,1,0,16,150354,28,5,1604,162193,15
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-04 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: ((TaskOnDisk<=ExecutingTask) + AG((FreeMemSegment<=TaskOnDisk)))
=> equivalent forward existential formula: [(FwdU((Init * !((TaskOnDisk<=ExecutingTask))),TRUE) * !((FreeMemSegment<=TaskOnDisk)))] = FALSE
(forward)formula 5,1,3.9573,38792,1,0,16,150354,30,5,1671,162193,15
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-05 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

***************************************

original formula: (AG(((LoadingMem>=1)||(FreeMemSegment>=2))) + (((TaskSuspended>=2)||(ExecutingTask>=3))&&(!((TaskReady>=1)&&((CPUUnit<=TaskOnDisk)||(DiskControllerUnit>=3))))))
=> equivalent forward existential formula: [(FwdU((Init * !((((TaskSuspended>=2)||(ExecutingTask>=3))&&(!((TaskReady>=1)&&((CPUUnit<=TaskOnDisk)||(DiskControllerUnit>=3))))))),TRUE) * !(((LoadingMem>=1)||(FreeMemSegment>=2))))] = FALSE
(forward)formula 6,0,3.96097,38792,1,0,19,150494,34,7,1689,162625,17
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-06 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: (AX(!(((CPUUnit>=1)||(TaskOnDisk<=TransferToDisk)))) + !(EF(!((DiskControllerUnit>=1)))))
=> equivalent forward existential formula: [(FwdU((Init * !(!(EX(!(!(((CPUUnit>=1)||(TaskOnDisk<=TransferToDisk)))))))),TRUE) * !((DiskControllerUnit>=1)))] = FALSE
Reverse transition relation is exact ! Faster fixpoint algorithm enabled.
(forward)formula 7,0,4.11505,40640,1,0,23,163307,37,10,1758,175908,20
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-07 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: AG(E(TRUE U (LoadingMem<=FreeMemSegment)))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !(E(TRUE U (LoadingMem<=FreeMemSegment))))] = FALSE
(forward)formula 8,1,7.38816,65192,1,0,24,221055,42,10,1768,228219,23
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-08 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

***************************************

original formula: EF((((LoadingMem>=2)||((LoadingMem>=1)&&(TaskReady>=1))) * EG((TaskOnDisk<=FreeMemSegment))))
=> equivalent forward existential formula: [FwdG((FwdU(Init,TRUE) * ((LoadingMem>=2)||((LoadingMem>=1)&&(TaskReady>=1)))),(TaskOnDisk<=FreeMemSegment))] != FALSE
Hit Full ! (commute/partial/dont) 3/0/5
(forward)formula 9,0,7.47623,67304,1,0,27,229395,50,12,1851,239851,28
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-09 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: AF(AG((DiskControllerUnit>=1)))
=> equivalent forward existential formula: [FwdG(Init,!(!(E(TRUE U !((DiskControllerUnit>=1))))))] = FALSE
(forward)formula 10,0,8.61793,84772,1,0,27,311944,50,12,1851,315806,32
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-10 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: AG(AX(!((CPUUnit<=TaskSuspended))))
=> equivalent forward existential formula: [(EY(FwdU(Init,TRUE)) * (CPUUnit<=TaskSuspended))] = FALSE
(forward)formula 11,0,8.61925,85300,1,0,29,311980,51,13,1851,315907,34
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-11 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: A(AG((FreeMemSegment>=3)) U AG((CPUUnit>=1)))
=> equivalent forward existential formula: [((Init * !(EG(!(!(E(TRUE U !((CPUUnit>=1)))))))) * !(E(!(!(E(TRUE U !((CPUUnit>=1))))) U (!(!(E(TRUE U !((FreeMemSegment>=3))))) * !(!(E(TRUE U !((CPUUnit>=1)))))))))] != FALSE
(forward)formula 12,0,16.6915,216544,1,0,30,906246,53,13,1852,947470,41
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-12 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: AG((!(((TaskReady<=CPUUnit)&&(CPUUnit<=TaskReady))) + AG((ExecutingTask>=3))))
=> equivalent forward existential formula: [(FwdU((FwdU(Init,TRUE) * !(!(((TaskReady<=CPUUnit)&&(CPUUnit<=TaskReady))))),TRUE) * !((ExecutingTask>=3)))] = FALSE
(forward)formula 13,0,25.0484,313648,1,0,34,1.25306e+06,56,16,2176,1.37328e+06,45
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-13 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: AG((AG((ExecutingTask<=CPUUnit)) + !(((TaskOnDisk>=2)||(TaskSuspended<=CPUUnit)))))
=> equivalent forward existential formula: [(FwdU((FwdU(Init,TRUE) * !(!(((TaskOnDisk>=2)||(TaskSuspended<=CPUUnit))))),TRUE) * !((ExecutingTask<=CPUUnit)))] = FALSE
(forward)formula 14,0,25.0879,314704,1,0,36,1.25674e+06,59,18,2375,1.37838e+06,49
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-14 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************

original formula: AG((DiskControllerUnit>=3))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !((DiskControllerUnit>=3)))] = FALSE
(forward)formula 15,0,25.0896,314704,1,0,38,1.2568e+06,61,20,2375,1.37847e+06,50
FORMULA SmallOperatingSystem-PT-MT0128DC0032-CTLCardinality-15 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

***************************************


BK_STOP 1527320036001

--------------------
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 CTLCardinality -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 CTLCardinality -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 26, 2018 7:33:29 AM fr.lip6.move.gal.application.Application start
INFO: Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLCardinality, -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 26, 2018 7:33:29 AM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /home/mcc/execution/model.pnml
May 26, 2018 7:33:29 AM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 32 ms
May 26, 2018 7:33:29 AM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 9 places.
May 26, 2018 7:33:29 AM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 8 transitions.
May 26, 2018 7:33:29 AM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/model.pnml.img.gal : 7 ms
May 26, 2018 7:33:29 AM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 31 ms
May 26, 2018 7:33:29 AM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/CTLCardinality.pnml.gal : 0 ms
May 26, 2018 7:33:29 AM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSCTLTools
INFO: Time to serialize properties into /home/mcc/execution/CTLCardinality.ctl : 2 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="SmallOperatingSystem-PT-MT0128DC0032"
export BK_EXAMINATION="CTLCardinality"
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/SmallOperatingSystem-PT-MT0128DC0032.tgz
mv SmallOperatingSystem-PT-MT0128DC0032 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 SmallOperatingSystem-PT-MT0128DC0032, examination is CTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r165-smll-152705516100038"
echo "====================================================================="
echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "CTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLCardinality" != "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 "CTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLCardinality.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 '' CTLCardinality.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 ;