fond
Model Checking Contest 2020
10th edition, Paris, France, June 23, 2020
Execution of r066-tajo-158922815101003
Last Updated
Jun 28, 2020

About the Execution of ITS-Tools for EnergyBus-PT-none

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15743.550 88917.00 101269.00 428.40 FFTTFTFFTTFFFFTT normal

Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2020-input.r066-tajo-158922815101003.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2020-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 EnergyBus-PT-none, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r066-tajo-158922815101003
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 3.4M
-rw-r--r-- 1 mcc users 3.0K Apr 13 13:19 CTLCardinality.txt
-rw-r--r-- 1 mcc users 17K Apr 13 13:19 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.7K Apr 13 13:18 CTLFireability.txt
-rw-r--r-- 1 mcc users 19K Apr 13 13:18 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Mar 24 05:37 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 5.9K Mar 24 05:37 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.5K Apr 8 15:19 LTLCardinality.txt
-rw-r--r-- 1 mcc users 26K Apr 28 14:01 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.0K Apr 8 15:19 LTLFireability.txt
-rw-r--r-- 1 mcc users 16K Apr 28 14:01 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.0K Apr 13 13:16 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 15K Apr 13 13:16 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 2.5K Apr 13 13:15 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 14K Apr 13 13:15 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Apr 13 13:16 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Apr 13 13:16 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 24 05:37 equiv_col
-rw-r--r-- 1 mcc users 5 Mar 24 05:37 instance
-rw-r--r-- 1 mcc users 6 Mar 24 05:37 iscolored
-rw-r--r-- 1 mcc users 3.2M 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 EnergyBus-PT-none-CTLCardinality-00
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-01
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-02
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-03
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-04
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-05
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-06
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-07
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-08
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-09
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-10
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-11
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-12
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-13
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-14
FORMULA_NAME EnergyBus-PT-none-CTLCardinality-15

=== Now, execution of the tool begins

BK_START 1590157961811

[2020-05-22 14:32:43] [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]
[2020-05-22 14:32:43] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2020-05-22 14:32:43] [INFO ] Load time of PNML (sax parser for PT used): 260 ms
[2020-05-22 14:32:43] [INFO ] Transformed 157 places.
[2020-05-22 14:32:43] [INFO ] Transformed 4430 transitions.
[2020-05-22 14:32:43] [INFO ] Found NUPN structural information;
[2020-05-22 14:32:43] [INFO ] Parsed PT model containing 157 places and 4430 transitions in 343 ms.
Deduced a syphon composed of 4 places in 58 ms
Reduce places removed 4 places and 825 transitions.
Ensure Unique test removed 1692 transitions
Reduce redundant transitions removed 1692 transitions.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 99 ms.
Incomplete random walk after 100000 steps, including 0 resets, run finished after 976 ms. (steps per millisecond=102 ) properties seen :[1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-05-22 14:32:44] [INFO ] Flow matrix only has 647 transitions (discarded 1266 similar events)
// Phase 1: matrix 647 rows 153 cols
[2020-05-22 14:32:44] [INFO ] Computed 23 place invariants in 18 ms
[2020-05-22 14:32:45] [INFO ] [Real]Absence check using 21 positive place invariants in 26 ms returned sat
[2020-05-22 14:32:45] [INFO ] [Real]Absence check using 21 positive and 2 generalized place invariants in 1 ms returned sat
[2020-05-22 14:32:45] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-05-22 14:32:45] [INFO ] [Real]Absence check using state equation in 281 ms returned sat
[2020-05-22 14:32:45] [INFO ] Solution in real domain found non-integer solution.
[2020-05-22 14:32:45] [INFO ] [Nat]Absence check using 21 positive place invariants in 12 ms returned unsat
Successfully simplified 1 atomic propositions for a total of 1 simplifications.
[2020-05-22 14:32:45] [INFO ] Initial state reduction rules for CTL removed 8 formulas.
[2020-05-22 14:32:45] [INFO ] Flatten gal took : 342 ms
[2020-05-22 14:32:46] [INFO ] Initial state reduction rules for CTL removed 8 formulas.
[2020-05-22 14:32:46] [INFO ] Flatten gal took : 183 ms
FORMULA EnergyBus-PT-none-CTLCardinality-11 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA EnergyBus-PT-none-CTLCardinality-09 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA EnergyBus-PT-none-CTLCardinality-07 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA EnergyBus-PT-none-CTLCardinality-06 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA EnergyBus-PT-none-CTLCardinality-04 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA EnergyBus-PT-none-CTLCardinality-03 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA EnergyBus-PT-none-CTLCardinality-01 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA EnergyBus-PT-none-CTLCardinality-00 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2020-05-22 14:32:46] [INFO ] Applying decomposition
[2020-05-22 14:32:46] [INFO ] Flatten gal took : 184 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/graph11645103986886024241.txt, -o, /tmp/graph11645103986886024241.bin, -w, /tmp/graph11645103986886024241.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/graph11645103986886024241.bin, -l, -1, -v, -w, /tmp/graph11645103986886024241.weights, -q, 0, -e, 0.001], workingDir=null]
[2020-05-22 14:32:47] [INFO ] Decomposing Gal with order
[2020-05-22 14:32:47] [INFO ] Rewriting arrays to variables to allow decomposition.
[2020-05-22 14:32:47] [INFO ] Removed a total of 7630 redundant transitions.
[2020-05-22 14:32:47] [INFO ] Flatten gal took : 384 ms
[2020-05-22 14:32:47] [INFO ] Fuse similar labels procedure discarded/fused a total of 160 labels/synchronizations in 63 ms.
[2020-05-22 14:32:47] [INFO ] Time to serialize gal into /home/mcc/execution/CTLCardinality.pnml.gal : 9 ms
[2020-05-22 14:32:47] [INFO ] Time to serialize properties into /home/mcc/execution/CTLCardinality.ctl : 0 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], 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
No direction supplied, using forward translation only.
Parsed 8 CTL formulae.
built 58 ordering constraints for composite.
built 7 ordering constraints for composite.
built 6 ordering constraints for composite.
built 15 ordering constraints for composite.
built 46 ordering constraints for composite.
built 10 ordering constraints for composite.
built 36 ordering constraints for composite.
built 11 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
reachable,2.13184e+12,7.50725,185704,2899,910,186765,23543,1047,1.2489e+06,263,361804,0


Converting to forward existential form...Done !
original formula: !(AG(EX(((i5.u10.p41==0)||(i5.u28.p138==1)))))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !(EX(((i5.u10.p41==0)||(i5.u28.p138==1)))))] != FALSE
Reverse transition relation is NOT exact ! Due to transitions t40, t152, t157, t160, t166, t176, t177, t213, t215, t279, t281, t625, t627, t821, t823, t837, t839, t887, t889, t903, t905, t1233, t1235, t1249, t1251, t1381, t1383, t1397, t1399, t1447, t1449, t1463, t1465, t1793, t1795, t1809, t1811, t2051, t2053, t2071, t2073, t2171, t2173, t2215, t2217, t2235, t2237, t2315, t2317, t3173, t3175, t3189, t3191, t3239, t3241, t3255, t3257, t3585, t3587, t3601, t3603, t3847, t3849, t3867, t3869, t3947, t3949, t4103, t4105, t4123, t4125, t4203, t4205, t4239, t4241, t4243, t4245, t4323, t4325, t4359, t4369, t4375, t4379, t4380, t4389, t4390, t4391, t4392, u11.t87, u11.t88, u11.t89, u11.t90, u11.t91, u14.t62, u14.t63, u14.t64, u14.t65, u14.t66, u19.t4357, i0.t104, i0.t103, i0.t102, i0.u0.t111, i0.u1.t105, i2.u4.t101, i2.u26.t150, i2.u27.t26, i2.u27.t27, i2.u27.t28, i2.u27.t29, i3.t4429, i3.t4420, i3.u7.t98, i3.u8.t128, i3.u23.t32, i3.u23.t33, i3.u23.t34, i3.u23.t35, i4.t4358, i4.t95, i4.t4, i4.u5.t100, i4.u5.t4365, i4.u5.t4366, i4.u30.t6, i4.u30.t8, i5.t16, i5.u10.t93, i5.u10.t132, i5.u10.t154, i5.u28.t17, i5.u28.t19, i12.u21.t41, i14.u29.t10, i14.u29.t11, i14.u29.t12, i14.u29.t13, i14.u31.t2, i14.u31.t3, Intersection with reachable at each step enabled. (destroyed/reverse/intersect/total) :0/390/139/529
(forward)formula 0,1,10.8196,186088,1,0,232093,34804,6358,1.2489e+06,1348,361804,608670
FORMULA EnergyBus-PT-none-CTLCardinality-02 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

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

original formula: EF(((i2.u25.p132!=0)&&(i3.u7.p30!=1)))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * ((i2.u25.p132!=0)&&(i3.u7.p30!=1)))] != FALSE
(forward)formula 1,1,10.8254,186088,1,0,232378,34804,6366,1.2489e+06,1350,361804,609759
FORMULA EnergyBus-PT-none-CTLCardinality-05 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

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

original formula: EG(TRUE)
=> equivalent forward existential formula: [FwdG(Init,TRUE)] != FALSE
Using saturation style SCC detection
Using saturation style SCC detection
Using saturation style SCC detection
Using saturation style SCC detection
Using saturation style SCC detection
Using saturation style SCC detection
Using saturation style SCC detection
Fast SCC detection found an SCC at level 1
Fast SCC detection found an SCC at level 2
Fast SCC detection found an SCC at level 3
Fast SCC detection found an SCC at level 4
Fast SCC detection found a local SCC at level 6
Fast SCC detection found an SCC at level 7
Fast SCC detection found an SCC at level 8
Fast SCC detection found an SCC at level 9
Fast SCC detection found an SCC at level 10
Fast SCC detection found an SCC at level 11
Fast SCC detection found an SCC at level 12
Fast SCC detection found an SCC at level 13
Fast SCC detection found an SCC at level 14
(forward)formula 2,1,21.0227,393592,1,0,429871,60506,7342,2.53411e+06,1462,739215,1062596
FORMULA EnergyBus-PT-none-CTLCardinality-08 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

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

original formula: AG(((u19.p98==0)||(i4.u20.p150==1)))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !(((u19.p98==0)||(i4.u20.p150==1))))] = FALSE
(forward)formula 3,0,21.0351,393856,1,0,429970,60521,7349,2.53504e+06,1464,739273,1064644
FORMULA EnergyBus-PT-none-CTLCardinality-10 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: AG(((((i4.u9.p36==0)||(i5.u13.p57==1))||(i2.u27.p128==0))||(i4.u9.p60==1)))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !(((((i4.u9.p36==0)||(i5.u13.p57==1))||(i2.u27.p128==0))||(i4.u9.p60==1))))] = FALSE
(forward)formula 4,0,21.0771,394648,1,0,431615,60788,7367,2.53922e+06,1467,739876,1068130
FORMULA EnergyBus-PT-none-CTLCardinality-12 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: AG((((i5.u10.p99==1)||(i4.u30.p148==0))||(i4.u5.p16==1)))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !((((i5.u10.p99==1)||(i4.u30.p148==0))||(i4.u5.p16==1))))] = FALSE
(forward)formula 5,0,21.1212,395704,1,0,433038,60994,7379,2.54285e+06,1468,740662,1072172
FORMULA EnergyBus-PT-none-CTLCardinality-13 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: EF(((u14.p62!=0)&&(i3.u8.p0!=1)))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * ((u14.p62!=0)&&(i3.u8.p0!=1)))] != FALSE
(forward)formula 6,1,21.1231,396232,1,0,433083,60998,7385,2.54286e+06,1469,740665,1072236
FORMULA EnergyBus-PT-none-CTLCardinality-14 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

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

original formula: E((((i0.u1.p4==0)||(u14.p62==1))||(i4.u30.p149==1)) U ((u11.p48==1)&&((i2.u27.p131==0)||(i3.u8.p32==1))))
=> equivalent forward existential formula: [(FwdU(Init,(((i0.u1.p4==0)||(u14.p62==1))||(i4.u30.p149==1))) * ((u11.p48==1)&&((i2.u27.p131==0)||(i3.u8.p32==1))))] != FALSE
(forward)formula 7,1,82.1896,1432428,1,0,1.75439e+06,71822,7481,8.1821e+06,1473,1.2157e+06,3993188
FORMULA EnergyBus-PT-none-CTLCardinality-15 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

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


BK_STOP 1590158050728

--------------------
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="EnergyBus-PT-none"
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 EnergyBus-PT-none, 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 r066-tajo-158922815101003"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/EnergyBus-PT-none.tgz
mv EnergyBus-PT-none 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 '' CTLCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
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 ;