About the Execution of ITS-Tools for BridgeAndVehicles-COL-V20P10N50
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
15716.960 | 3600000.00 | 3575811.00 | 123393.00 | ???????FT??????? | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fko/mcc2020-input.r021-oct2-158897698700163.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fko/mcc2020-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
.....................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is BridgeAndVehicles-COL-V20P10N50, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r021-oct2-158897698700163
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 236K
-rw-r--r-- 1 mcc users 4.1K Mar 26 02:24 CTLCardinality.txt
-rw-r--r-- 1 mcc users 21K Mar 26 02:24 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.9K Mar 25 20:55 CTLFireability.txt
-rw-r--r-- 1 mcc users 15K Mar 25 20:54 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Mar 24 05:37 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.1K Mar 24 05:37 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.1K Apr 8 14:42 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K Apr 28 14:00 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.7K Apr 8 14:42 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Apr 28 14:00 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.8K Mar 25 17:23 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 17K Mar 25 17:22 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.6K Mar 25 12:22 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 18K Mar 25 12:22 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K Mar 25 17:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.0K Mar 25 17:54 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Mar 24 05:37 equiv_pt
-rw-r--r-- 1 mcc users 10 Mar 24 05:37 instance
-rw-r--r-- 1 mcc users 5 Mar 24 05:37 iscolored
-rw-r--r-- 1 mcc users 41K Mar 24 05:37 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 BridgeAndVehicles-COL-V20P10N50-CTLCardinality-00
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-01
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-02
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-03
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-04
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-05
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-06
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-07
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-08
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-09
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-10
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-11
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-12
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-13
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-14
FORMULA_NAME BridgeAndVehicles-COL-V20P10N50-CTLCardinality-15
=== Now, execution of the tool begins
BK_START 1589210171413
[2020-05-11 15:16:13] [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/, -greatspnpath, /home/mcc/BenchKit//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2020-05-11 15:16:13] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2020-05-11 15:16:13] [INFO ] Detected file is not PT type :http://www.pnml.org/version-2009/grammar/symmetricnet
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[2020-05-11 15:16:14] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 585 ms
[2020-05-11 15:16:14] [INFO ] sort/places :
sens->CONTROLEUR,CHOIX,VIDANGE,
compteur->COMPTEUR,
Dot->CAPACITE,SORTI_A,ROUTE_A,ATTENTE_A,SUR_PONT_A,SUR_PONT_B,ATTENTE_B,ROUTE_B,SORTI_B,
voitureA->NB_ATTENTE_A,
voitureB->NB_ATTENTE_B,
[2020-05-11 15:16:14] [INFO ] Imported 15 HL places and 11 HL transitions for a total of 108 PT places and 90298.0 transition bindings in 49 ms.
[2020-05-11 15:16:14] [INFO ] Computed order based on color domains.
[2020-05-11 15:16:14] [INFO ] Unfolded HLPN to a Petri net with 108 places and 2228 transitions in 39 ms.
[2020-05-11 15:16:14] [INFO ] Unfolded HLPN properties in 1 ms.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 78 ms.
Incomplete random walk after 100000 steps, including 577 resets, run finished after 837 ms. (steps per millisecond=119 ) properties seen :[1, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1]
[2020-05-11 15:16:15] [INFO ] Flow matrix only has 290 transitions (discarded 1938 similar events)
// Phase 1: matrix 290 rows 108 cols
[2020-05-11 15:16:15] [INFO ] Computed 7 place invariants in 13 ms
[2020-05-11 15:16:15] [INFO ] [Real]Absence check using 7 positive place invariants in 9 ms returned unsat
[2020-05-11 15:16:15] [INFO ] [Real]Absence check using 7 positive place invariants in 7 ms returned sat
[2020-05-11 15:16:15] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-05-11 15:16:15] [INFO ] [Real]Absence check using state equation in 168 ms returned sat
[2020-05-11 15:16:15] [INFO ] Solution in real domain found non-integer solution.
[2020-05-11 15:16:15] [INFO ] [Nat]Absence check using 7 positive place invariants in 9 ms returned sat
[2020-05-11 15:16:15] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2020-05-11 15:16:15] [INFO ] [Nat]Absence check using state equation in 218 ms returned sat
[2020-05-11 15:16:15] [INFO ] State equation strengthened by 102 read => feed constraints.
[2020-05-11 15:16:15] [INFO ] [Nat]Added 102 Read/Feed constraints in 54 ms returned sat
[2020-05-11 15:16:16] [INFO ] Deduced a trap composed of 55 places in 405 ms
[2020-05-11 15:16:16] [INFO ] Deduced a trap composed of 5 places in 388 ms
[2020-05-11 15:16:16] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 949 ms
[2020-05-11 15:16:17] [INFO ] Computed and/alt/rep : 2225/114389/287 causal constraints in 245 ms.
[2020-05-11 15:16:31] [INFO ] Added : 270 causal constraints over 54 iterations in 14719 ms. Result :unknown
[2020-05-11 15:16:31] [INFO ] [Real]Absence check using 7 positive place invariants in 4 ms returned unsat
[2020-05-11 15:16:31] [INFO ] [Real]Absence check using 7 positive place invariants in 3 ms returned unsat
[2020-05-11 15:16:31] [INFO ] [Real]Absence check using 7 positive place invariants in 5 ms returned unsat
[2020-05-11 15:16:31] [INFO ] [Real]Absence check using 7 positive place invariants in 1 ms returned unsat
[2020-05-11 15:16:31] [INFO ] [Real]Absence check using 7 positive place invariants in 4 ms returned sat
[2020-05-11 15:16:31] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-05-11 15:16:31] [INFO ] [Real]Absence check using state equation in 105 ms returned sat
[2020-05-11 15:16:31] [INFO ] Solution in real domain found non-integer solution.
[2020-05-11 15:16:31] [INFO ] [Nat]Absence check using 7 positive place invariants in 5 ms returned sat
[2020-05-11 15:16:31] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2020-05-11 15:16:31] [INFO ] [Nat]Absence check using state equation in 137 ms returned sat
[2020-05-11 15:16:31] [INFO ] [Nat]Added 102 Read/Feed constraints in 30 ms returned sat
[2020-05-11 15:16:32] [INFO ] Deduced a trap composed of 56 places in 247 ms
[2020-05-11 15:16:32] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 269 ms
[2020-05-11 15:16:32] [INFO ] Computed and/alt/rep : 2225/114389/287 causal constraints in 191 ms.
[2020-05-11 15:16:36] [INFO ] Added : 188 causal constraints over 39 iterations in 4570 ms. Result :sat
[2020-05-11 15:16:36] [INFO ] [Real]Absence check using 7 positive place invariants in 1 ms returned unsat
Successfully simplified 6 atomic propositions for a total of 6 simplifications.
[2020-05-11 15:16:37] [INFO ] Initial state reduction rules for CTL removed 2 formulas.
[2020-05-11 15:16:37] [INFO ] Flatten gal took : 406 ms
[2020-05-11 15:16:37] [INFO ] Initial state reduction rules for CTL removed 2 formulas.
[2020-05-11 15:16:37] [INFO ] Flatten gal took : 208 ms
FORMULA BridgeAndVehicles-COL-V20P10N50-CTLCardinality-08 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BridgeAndVehicles-COL-V20P10N50-CTLCardinality-07 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2020-05-11 15:16:37] [INFO ] Applying decomposition
[2020-05-11 15:16:38] [INFO ] Flatten gal took : 218 ms
Converted graph to binary with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202005100927/bin/convert-linux64, -i, /tmp/graph9233726107593389096.txt, -o, /tmp/graph9233726107593389096.bin, -w, /tmp/graph9233726107593389096.weights], workingDir=null]
Built communities with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202005100927/bin/louvain-linux64, /tmp/graph9233726107593389096.bin, -l, -1, -v, -w, /tmp/graph9233726107593389096.weights, -q, 0, -e, 0.001], workingDir=null]
[2020-05-11 15:16:38] [INFO ] Decomposing Gal with order
[2020-05-11 15:16:38] [INFO ] Rewriting arrays to variables to allow decomposition.
[2020-05-11 15:16:42] [INFO ] Removed a total of 4524 redundant transitions.
[2020-05-11 15:16:43] [INFO ] Flatten gal took : 4226 ms
[2020-05-11 15:16:43] [INFO ] Fuse similar labels procedure discarded/fused a total of 2172 labels/synchronizations in 137 ms.
[2020-05-11 15:16:43] [INFO ] Time to serialize gal into /home/mcc/execution/CTLCardinality.pnml.gal : 47 ms
[2020-05-11 15:16:43] [INFO ] Time to serialize properties into /home/mcc/execution/CTLCardinality.ctl : 3 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202005100927/bin/its-ctl-linux64, --gc-threshold, 2000000, --quiet, -i, /home/mcc/execution/CTLCardinality.pnml.gal, -t, CGAL, -ctl, /home/mcc/execution/CTLCardinality.ctl, --gen-order, FOLLOW], workingDir=/home/mcc/execution]
its-ctl command run as :
/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202005100927/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /home/mcc/execution/CTLCardinality.pnml.gal -t CGAL -ctl /home/mcc/execution/CTLCardinality.ctl --gen-order FOLLOW
No direction supplied, using forward translation only.
Parsed 14 CTL formulae.
Detected timeout of ITS tools.
[2020-05-11 15:36:51] [INFO ] Applying decomposition
[2020-05-11 15:36:52] [INFO ] Flatten gal took : 85 ms
[2020-05-11 15:36:52] [INFO ] Decomposing Gal with order
[2020-05-11 15:36:52] [INFO ] Rewriting arrays to variables to allow decomposition.
[2020-05-11 15:36:52] [INFO ] Removed a total of 12670 redundant transitions.
[2020-05-11 15:36:52] [INFO ] Flatten gal took : 203 ms
[2020-05-11 15:36:52] [INFO ] Fuse similar labels procedure discarded/fused a total of 0 labels/synchronizations in 31 ms.
[2020-05-11 15:36:52] [INFO ] Time to serialize gal into /home/mcc/execution/CTLCardinality.pnml.gal : 11 ms
[2020-05-11 15:36:52] [INFO ] Time to serialize properties into /home/mcc/execution/CTLCardinality.ctl : 1 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202005100927/bin/its-ctl-linux64, --gc-threshold, 2000000, --quiet, -i, /home/mcc/execution/CTLCardinality.pnml.gal, -t, CGAL, -ctl, /home/mcc/execution/CTLCardinality.ctl, --gen-order, FOLLOW], workingDir=/home/mcc/execution]
its-ctl command run as :
/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202005100927/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /home/mcc/execution/CTLCardinality.pnml.gal -t CGAL -ctl /home/mcc/execution/CTLCardinality.ctl --gen-order FOLLOW
No direction supplied, using forward translation only.
Parsed 14 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,9.08086e+06,252.54,2855520,2,434231,5,8.41109e+06,6,0,2656,6.07528e+06,0
Converting to forward existential form...Done !
Detected timeout of ITS tools.
[2020-05-11 15:57:02] [INFO ] Flatten gal took : 517 ms
[2020-05-11 15:57:04] [INFO ] Input system was already deterministic with 2228 transitions.
[2020-05-11 15:57:04] [INFO ] Transformed 108 places.
[2020-05-11 15:57:04] [INFO ] Transformed 2228 transitions.
Running greatSPN : CommandLine [args=[/home/mcc/BenchKit//greatspn//bin/pinvar, /home/mcc/execution/gspn], workingDir=/home/mcc/execution]
Run of greatSPN captured in /home/mcc/execution/outPut.txt
Running greatSPN : CommandLine [args=[/home/mcc/BenchKit//greatspn//bin/RGMEDD2, /home/mcc/execution/gspn, -META, -varord-only], workingDir=/home/mcc/execution]
Run of greatSPN captured in /home/mcc/execution/outPut.txt
Using order generated by GreatSPN with heuristic : META
[2020-05-11 15:57:04] [INFO ] Time to serialize gal into /home/mcc/execution/CTLCardinality.pnml.gal : 13 ms
[2020-05-11 15:57:04] [INFO ] Time to serialize properties into /home/mcc/execution/CTLCardinality.ctl : 6 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202005100927/bin/its-ctl-linux64, --gc-threshold, 2000000, --quiet, -i, /home/mcc/execution/CTLCardinality.pnml.gal, -t, CGAL, -ctl, /home/mcc/execution/CTLCardinality.ctl, --load-order, /home/mcc/execution/model.ord, --gen-order, FOLLOW], workingDir=/home/mcc/execution]
its-ctl command run as :
/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202005100927/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /home/mcc/execution/CTLCardinality.pnml.gal -t CGAL -ctl /home/mcc/execution/CTLCardinality.ctl --load-order /home/mcc/execution/model.ord --gen-order FOLLOW
Successfully loaded order from file /home/mcc/execution/model.ord
No direction supplied, using forward translation only.
Parsed 14 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,9.08086e+06,126.526,3155376,2,626959,5,4.12818e+06,6,0,2656,3.01206e+06,0
Converting to forward existential form...Done !
BK_TIME_CONFINEMENT_REACHED
--------------------
content from stderr:
+ export BINDIR=/home/mcc/BenchKit/
+ BINDIR=/home/mcc/BenchKit/
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ CTLCardinality = StateSpace ]]
+ /home/mcc/BenchKit//runeclipse.sh /home/mcc/execution CTLCardinality -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -greatspnpath /home/mcc/BenchKit//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ /home/mcc/BenchKit//itstools/its-tools -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/ -greatspnpath /home/mcc/BenchKit//greatspn/ -order META -manyOrder -smt -timeout 3600 -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss128m -Xms40m -Xmx16000m -Dfile.encoding=UTF-8 -Dosgi.requiredJavaVersion=1.6
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="BridgeAndVehicles-COL-V20P10N50"
export BK_EXAMINATION="CTLCardinality"
export BK_TOOL="itstools"
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
# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-4028"
echo " Executing tool itstools"
echo " Input is BridgeAndVehicles-COL-V20P10N50, 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 r021-oct2-158897698700163"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/BridgeAndVehicles-COL-V20P10N50.tgz
mv BridgeAndVehicles-COL-V20P10N50 execution
cd execution
if [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "UpperBounds" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] || [ "CTLCardinality" = "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 [ "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 '
echo "FORMULA_NAME $x"
done
elif [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLCardinality"
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 ;