fond
Model Checking Contest 2020
10th edition, Paris, France, June 23, 2020
Execution of r051-ebro-158902545900213
Last Updated
Jun 28, 2020

About the Execution of ITS-Tools for DES-PT-02a

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15756.700 46022.00 56326.00 160.40 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 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.r051-ebro-158902545900213.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 DES-PT-02a, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r051-ebro-158902545900213
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 188K
-rw-r--r-- 1 mcc users 3.2K Mar 30 01:52 CTLCardinality.txt
-rw-r--r-- 1 mcc users 19K Mar 30 01:52 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.0K Mar 28 16:16 CTLFireability.txt
-rw-r--r-- 1 mcc users 12K Mar 28 16:16 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Mar 24 05:37 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.1K Apr 8 14:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Apr 28 14:00 LTLCardinality.xml
-rw-r--r-- 1 mcc users 1.8K Apr 8 14:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Apr 28 14:00 LTLFireability.xml
-rw-r--r-- 1 mcc users 2.6K Mar 27 08:48 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 12K Mar 27 08:48 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 2.4K Mar 26 08:15 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 14K Mar 26 08:15 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.5K Mar 28 14:49 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.5K Mar 28 14:49 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 24 05:37 equiv_col
-rw-r--r-- 1 mcc users 4 Mar 24 05:37 instance
-rw-r--r-- 1 mcc users 6 Mar 24 05:37 iscolored
-rw-r--r-- 1 mcc users 33K 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 positive values
NUM_VECTOR

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

=== Now, execution of the tool begins

BK_START 1589528336337

[2020-05-15 07:38:59] [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/, -greatspnpath, /home/mcc/BenchKit//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2020-05-15 07:39:00] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2020-05-15 07:39:00] [INFO ] Load time of PNML (sax parser for PT used): 144 ms
[2020-05-15 07:39:00] [INFO ] Transformed 123 places.
[2020-05-15 07:39:00] [INFO ] Transformed 80 transitions.
[2020-05-15 07:39:00] [INFO ] Found NUPN structural information;
[2020-05-15 07:39:00] [INFO ] Parsed PT model containing 123 places and 80 transitions in 259 ms.
Ensure Unique test removed 14 transitions
Reduce redundant transitions removed 14 transitions.
Parsed 16 properties from file /home/mcc/execution/UpperBounds.xml in 65 ms.
Finished random walk after 0 steps, including 0 resets, run visited all 0 properties in 1 ms. (steps per millisecond=0 )
[2020-05-15 07:39:00] [INFO ] Flatten gal took : 111 ms
[2020-05-15 07:39:00] [INFO ] Applying decomposition
[2020-05-15 07:39:00] [INFO ] Flatten gal took : 39 ms
[2020-05-15 07:39:00] [INFO ] Time to serialize gal into /home/mcc/execution/UpperBounds.pnml.gal : 25 ms
[2020-05-15 07:39:00] [INFO ] Time to serialize properties into /home/mcc/execution/UpperBounds.prop : 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-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /home/mcc/execution/UpperBounds.pnml.gal, -t, CGAL, -reachable-file, UpperBounds.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_1.0.0.202005100927/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /home/mcc/execution/UpperBounds.pnml.gal -t CGAL -reachable-file UpperBounds.prop --nowitness --gen-order FOLLOW
Loading property file UpperBounds.prop.
Read [bounds] property : DES-PT-02a-UpperBounds-00 with value :p106
Read [bounds] property : DES-PT-02a-UpperBounds-01 with value :p35
Read [bounds] property : DES-PT-02a-UpperBounds-02 with value :p88
Read [bounds] property : DES-PT-02a-UpperBounds-03 with value :p79
Read [bounds] property : DES-PT-02a-UpperBounds-04 with value :p18
Read [bounds] property : DES-PT-02a-UpperBounds-05 with value :p66
Read [bounds] property : DES-PT-02a-UpperBounds-06 with value :p100
Read [bounds] property : DES-PT-02a-UpperBounds-07 with value :p116
Read [bounds] property : DES-PT-02a-UpperBounds-08 with value :p2
Read [bounds] property : DES-PT-02a-UpperBounds-09 with value :p26
Read [bounds] property : DES-PT-02a-UpperBounds-10 with value :p58
Read [bounds] property : DES-PT-02a-UpperBounds-11 with value :p88
Read [bounds] property : DES-PT-02a-UpperBounds-12 with value :p60
Read [bounds] property : DES-PT-02a-UpperBounds-13 with value :p17
Read [bounds] property : DES-PT-02a-UpperBounds-14 with value :p93
Read [bounds] property : DES-PT-02a-UpperBounds-15 with value :p90
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
petri\_inst\_inst,4.95322e+09,35.2787,484164,2,315397,5,2.19992e+06,6,0,557,2.3578e+06,0
Total reachable state count : 4953223116

Verifying 16 reachability properties.
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-00 :0 <= p106 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-00,0,35.3229,484164,1,0,7,2.19992e+06,9,1,719,2.3578e+06,4
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-01 :0 <= p35 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-01,0,35.8556,484164,1,0,8,2.19992e+06,10,1,898,2.3578e+06,5
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-02 :0 <= p88 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-02,0,35.8658,484164,1,0,9,2.19992e+06,11,1,971,2.3578e+06,6
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-03 :0 <= p79 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-03,0,35.9596,484164,1,0,10,2.19992e+06,12,1,1062,2.3578e+06,7
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-04 :0 <= p18 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-04,0,36.6408,484164,1,0,11,2.19992e+06,13,1,1275,2.3578e+06,8
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-05 :0 <= p66 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-05,0,37.1637,484164,1,0,12,2.19992e+06,14,1,1392,2.3578e+06,9
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-06 :0 <= p100 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-06,0,37.1668,484164,1,0,13,2.19992e+06,15,1,1441,2.3578e+06,10
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-07 :0 <= p116 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-07,0,37.1672,484164,1,0,14,2.19992e+06,16,1,1458,2.3578e+06,11
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-08 :0 <= p2 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-08,0,37.7882,484164,1,0,15,2.19992e+06,17,1,1703,2.3578e+06,12
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-09 :0 <= p26 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-09,0,38.4218,484164,1,0,16,2.19992e+06,18,1,1900,2.3578e+06,13
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-10 :0 <= p58 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-10,0,39.1405,484164,1,0,17,2.19992e+06,19,1,2033,2.3578e+06,14
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-11 :0 <= p88 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-11,0,39.1416,484164,1,0,17,2.19992e+06,19,1,2033,2.3578e+06,14
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-12 :0 <= p60 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-12,0,39.8243,484164,1,0,18,2.19992e+06,20,1,2162,2.3578e+06,15
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-13 :0 <= p17 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-13,0,40.5447,484164,1,0,19,2.19992e+06,21,1,2377,2.3578e+06,16
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-14 :0 <= p93 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-14,0,40.5559,484164,1,0,20,2.19992e+06,22,1,2440,2.3578e+06,17
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property DES-PT-02a-UpperBounds-15 :0 <= p90 <= 1
FORMULA DES-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
DES-PT-02a-UpperBounds-15,0,40.5662,484164,1,0,21,2.19992e+06,23,1,2509,2.3578e+06,18

BK_STOP 1589528382359

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

+ export BINDIR=/home/mcc/BenchKit/
+ BINDIR=/home/mcc/BenchKit/
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ UpperBounds = StateSpace ]]
+ /home/mcc/BenchKit//runeclipse.sh /home/mcc/execution UpperBounds -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 UpperBounds -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="DES-PT-02a"
export BK_EXAMINATION="UpperBounds"
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 DES-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 r051-ebro-158902545900213"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/DES-PT-02a.tgz
mv DES-PT-02a execution
cd execution
if [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "UpperBounds" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] || [ "UpperBounds" = "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 [ "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
elif [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] ; then
echo "FORMULA_NAME UpperBounds"
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 ;