fond
Model Checking Contest 2018
8th edition, Bratislava, Slovakia, June 26, 2018
Execution of r115-csrt-152666473700200
Last Updated
June 26, 2018

About the Execution of Irma.struct for MultiwaySync-PT-none

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
933.940 19727.00 29365.00 239.90 TFFFFFTFTFFFFTFF normal

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 264K
-rw-r--r-- 1 mcc users 3.0K May 15 18:54 CTLCardinality.txt
-rw-r--r-- 1 mcc users 15K May 15 18:54 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K May 15 18:54 CTLFireability.txt
-rw-r--r-- 1 mcc users 13K 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 5.8K May 15 18:50 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 2.2K May 15 18:54 LTLCardinality.txt
-rw-r--r-- 1 mcc users 9.1K May 15 18:54 LTLCardinality.xml
-rw-r--r-- 1 mcc users 1.7K May 15 18:54 LTLFireability.txt
-rw-r--r-- 1 mcc users 6.6K May 15 18:54 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.4K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 17K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 111 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 349 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 2.7K May 15 18:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 16K May 15 18:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K May 15 18:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K 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 5 May 15 18:50 instance
-rw-r--r-- 1 mcc users 6 May 15 18:50 iscolored
-rw-r--r-- 1 mcc users 111K May 15 18:50 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool irma4mcc-structural
Input is MultiwaySync-PT-none, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r115-csrt-152666473700200
=====================================================================


--------------------
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 MultiwaySync-PT-none-CTLFireability-00
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-01
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-02
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-03
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-04
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-05
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-06
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-07
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-08
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-09
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-10
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-11
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-12
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-13
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-14
FORMULA_NAME MultiwaySync-PT-none-CTLFireability-15

=== Now, execution of the tool begins

BK_START 1527151745085


BK_STOP 1527151764812

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

Prefix is 75f5f979.
Reading known information in /usr/share/mcc4mcc/75f5f979-known.json.
Reading learned information in /usr/share/mcc4mcc/75f5f979-learned.json.
Reading value translations in /usr/share/mcc4mcc/75f5f979-values.json.
Using directory /home/mcc/execution for input, as it contains a model.pnml file.
Using MultiwaySync-PT-none as instance name.
Using MultiwaySync as model name.
Using algorithm or tool bmdt.
Model characteristics are: {'Examination': 'CTLFireability', 'Place/Transition': True, 'Colored': False, 'Relative-Time': 1, 'Relative-Memory': 1, 'Ordinary': True, 'Simple Free Choice': False, 'Extended Free Choice': False, 'State Machine': False, 'Marked Graph': False, 'Connected': True, 'Strongly Connected': False, 'Source Place': True, 'Sink Place': False, 'Source Transition': False, 'Sink Transition': False, 'Loop Free': False, 'Conservative': False, 'Sub-Conservative': False, 'Nested Units': True, 'Safe': True, 'Deadlock': None, 'Reversible': None, 'Quasi Live': None, 'Live': None}.
Known tools are: [{'Time': 5634, 'Memory': 349.29, 'Tool': 'itstools'}, {'Time': 5926, 'Memory': 359.02, 'Tool': 'itstools'}, {'Time': 29242, 'Memory': 2637.67, 'Tool': 'marcie'}, {'Time': 31350, 'Memory': 2638.02, 'Tool': 'marcie'}, {'Time': 2616154, 'Memory': 8036.62, 'Tool': 'lola'}, {'Time': 2616191, 'Memory': 8036.2, 'Tool': 'lola'}].
Learned tools are: [{'Tool': 'marcie'}].
Learned tool marcie is 5.190273340433085x far from the best tool itstools.
CTLFireability itstools MultiwaySync-PT-none...
May 24, 2018 8:49:11 AM fr.lip6.move.gal.application.Application start
INFO: Running its-tools with arguments : [-z3path, /usr/bin/z3, -yices2path, /usr/bin/yices, -ltsminpath, /usr/bin, -smt, -its, -pnfolder, /mcc-data, -examination, CTLFireability]
May 24, 2018 8:49:11 AM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /mcc-data/model.pnml
May 24, 2018 8:49:11 AM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 70 ms
May 24, 2018 8:49:11 AM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 222 places.
May 24, 2018 8:49:11 AM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 472 transitions.
May 24, 2018 8:49:11 AM fr.lip6.move.gal.pnml.togal.PnmlToGalTransformer transform
INFO: Found NUPN structural information;
May 24, 2018 8:49:11 AM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /mcc-data/model.pnml.img.gal : 25 ms
May 24, 2018 8:49:11 AM fr.lip6.move.gal.application.MccTranslator applyOrder
INFO: Applying decomposition
May 24, 2018 8:49:11 AM fr.lip6.move.gal.instantiate.CompositeBuilder decomposeWithOrder
INFO: Decomposing Gal with order
May 24, 2018 8:49:11 AM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 112 ms
May 24, 2018 8:49:11 AM fr.lip6.move.gal.instantiate.CompositeBuilder rewriteArraysToAllowPartition
INFO: Rewriting arrays to variables to allow decomposition.
May 24, 2018 8:49:11 AM fr.lip6.move.gal.instantiate.Instantiator fuseIsomorphicEffects
INFO: Removed a total of 309 redundant transitions.
May 24, 2018 8:49:11 AM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /mcc-data/CTLFireability.pnml.gal : 7 ms
May 24, 2018 8:49:11 AM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSCTLTools
INFO: Time to serialize properties into /mcc-data/CTLFireability.ctl : 2 ms
Invoking ITS tools like this :CommandLine [args=[/usr/share/itscl/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201804131302/bin/its-ctl-linux64, --gc-threshold, 2000000, --quiet, -i, /mcc-data/CTLFireability.pnml.gal, -t, CGAL, -ctl, /mcc-data/CTLFireability.ctl], workingDir=/mcc-data]

its-ctl command run as :

/usr/share/itscl/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201804131302/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /mcc-data/CTLFireability.pnml.gal -t CGAL -ctl /mcc-data/CTLFireability.ctl
No direction supplied, using forward translation only.
Parsed 16 CTL formulae.
built 27 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,5.2596e+19,0.217327,9356,96,173,8138,2964,629,10076,162,17899,0


Converting to forward existential form...Done !
original formula: (EG(!(EG(((u7.p87>=1)&&(u8.p102>=1))))) + E(AF(((u8.p100>=1)&&(u27.p220>=1))) U (u17.p190>=1)))
=> equivalent forward existential formula: ([FwdG(Init,!(EG(((u7.p87>=1)&&(u8.p102>=1)))))] != FALSE + [(FwdU(Init,!(EG(!(((u8.p100>=1)&&(u27.p220>=1)))))) * (u17.p190>=1))] != FALSE)
Reverse transition relation is NOT exact ! Due to transitions t395, t461, t465, t467, u2.t173, u2.t175, u2.t180, u4.t153, u4.t155, u4.t160, u6.t137, u6.t139, u6.t144, u8.t115, u8.t117, u8.t122, u10.t90, u10.t92, u10.t97, u12.t74, u12.t76, u12.t81, Intersection with reachable at each step enabled. (destroyed/reverse/intersect/total) :83/367/22/472
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
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
Using saturation style SCC detection
Using saturation style SCC detection
Fast SCC detection found an SCC at level 27
(forward)formula 0,1,2.56928,68664,1,0,118181,9787,2832,202874,1202,64791,79152
FORMULA MultiwaySync-PT-none-CTLFireability-00 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

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

original formula: EF(AX(AG(((u11.p157>=1)&&(u12.p161>=1)))))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !(EX(!(!(E(TRUE U !(((u11.p157>=1)&&(u12.p161>=1)))))))))] != FALSE
(forward)formula 1,0,2.57888,68928,1,0,118361,10038,2990,203092,1243,65361,79745
FORMULA MultiwaySync-PT-none-CTLFireability-01 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: AG(AF(((!((u7.p81>=1)&&(u8.p106>=1)))&&(((u27.p220>=1)&&(u4.p40>=1))||(u27.p221>=1)))))
=> equivalent forward existential formula: [FwdG(FwdU(Init,TRUE),!(((!((u7.p81>=1)&&(u8.p106>=1)))&&(((u27.p220>=1)&&(u4.p40>=1))||(u27.p221>=1)))))] = FALSE
(forward)formula 2,0,4.02824,100608,1,0,154749,12703,3120,375062,1278,96856,92920
FORMULA MultiwaySync-PT-none-CTLFireability-02 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: ((u9.p127>=1) + AF((EF((u25.p216>=1)) * AF(((u12.p159>=1)&&(u27.p220>=1))))))
=> equivalent forward existential formula: [FwdG((Init * !((u9.p127>=1))),!((E(TRUE U (u25.p216>=1)) * !(EG(!(((u12.p159>=1)&&(u27.p220>=1))))))))] = FALSE
(forward)formula 3,0,5.5986,141528,1,0,241537,12787,3144,510626,1279,97660,135677
FORMULA MultiwaySync-PT-none-CTLFireability-03 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: E((((!((u27.p220>=1)&&(u6.p74>=1)))||(!(u10.p140>=1))) + AX(((u4.p36>=1)&&(u27.p220>=1)))) U AG((((u22.p207>=1)&&(u27.p220>=1))&&((u27.p220>=1)&&(u4.p47>=1)))))
=> equivalent forward existential formula: [(FwdU(Init,(((!((u27.p220>=1)&&(u6.p74>=1)))||(!(u10.p140>=1))) + !(EX(!(((u4.p36>=1)&&(u27.p220>=1))))))) * !(E(TRUE U !((((u22.p207>=1)&&(u27.p220>=1))&&((u27.p220>=1)&&(u4.p47>=1)))))))] != FALSE
(forward)formula 4,0,5.60222,141792,1,0,241649,12909,3158,510735,1281,97919,135914
FORMULA MultiwaySync-PT-none-CTLFireability-04 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: AF(EG((u10.p140>=1)))
=> equivalent forward existential formula: [FwdG(Init,!(EG((u10.p140>=1))))] = FALSE
(forward)formula 5,0,6.75365,174792,1,0,309423,13368,3175,624602,1281,102703,167756
FORMULA MultiwaySync-PT-none-CTLFireability-05 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: AX(EF(((u10.p143>=1)&&(u27.p220>=1))))
=> equivalent forward existential formula: [(EY(Init) * !(E(TRUE U ((u10.p143>=1)&&(u27.p220>=1)))))] = FALSE
(forward)formula 6,1,6.76336,175056,1,0,309972,14063,3178,625126,1281,104207,168708
FORMULA MultiwaySync-PT-none-CTLFireability-06 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

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

original formula: !(EG(!(((u10.p143>=1)&&(u27.p220>=1)))))
=> equivalent forward existential formula: [FwdG(Init,!(((u10.p143>=1)&&(u27.p220>=1))))] = FALSE
(forward)formula 7,0,7.05589,187728,1,0,342298,14590,3249,666868,1290,114333,196343
FORMULA MultiwaySync-PT-none-CTLFireability-07 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: EG(AF((((u4.p41>=1)||(u13.p178>=1))||(!((u27.p220>=1)&&(u12.p175>=1))))))
=> equivalent forward existential formula: [FwdG(Init,!(EG(!((((u4.p41>=1)||(u13.p178>=1))||(!((u27.p220>=1)&&(u12.p175>=1))))))))] != FALSE
(forward)formula 8,1,7.38603,200136,1,0,371243,17328,3312,697518,1290,129855,220393
FORMULA MultiwaySync-PT-none-CTLFireability-08 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

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

original formula: !(EX(E((u26.p219>=1) U ((u2.p22>=1)&&(u27.p220>=1)))))
=> equivalent forward existential formula: [(FwdU(EY(Init),(u26.p219>=1)) * ((u2.p22>=1)&&(u27.p220>=1)))] = FALSE
(forward)formula 9,0,7.38978,200400,1,0,371500,17328,3337,697657,1290,129855,220789
FORMULA MultiwaySync-PT-none-CTLFireability-09 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: EG(!(EG(!(((u12.p159>=1)&&(u27.p220>=1))))))
=> equivalent forward existential formula: [FwdG(Init,!(EG(!(((u12.p159>=1)&&(u27.p220>=1))))))] != FALSE
(forward)formula 10,0,7.39082,200400,1,0,371500,17328,3340,697658,1290,129855,220789
FORMULA MultiwaySync-PT-none-CTLFireability-10 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: AF((E((u4.p45>=1) U (u9.p120>=1)) * !(((!((u8.p99>=1)&&(u27.p220>=1)))||((u17.p190>=1)&&((u6.p70>=1)&&(u27.p220>=1)))))))
=> equivalent forward existential formula: [FwdG(Init,!((E((u4.p45>=1) U (u9.p120>=1)) * !(((!((u8.p99>=1)&&(u27.p220>=1)))||((u17.p190>=1)&&((u6.p70>=1)&&(u27.p220>=1))))))))] = FALSE
(forward)formula 11,0,12.0901,274056,1,0,490415,20652,3440,972448,1290,149563,288965
FORMULA MultiwaySync-PT-none-CTLFireability-11 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: (AF(AG((((u10.p147>=1)&&(u27.p220>=1))||((u7.p80>=1)&&(u8.p111>=1))))) + EX((u10.p152>=1)))
=> equivalent forward existential formula: [FwdG((Init * !(EX((u10.p152>=1)))),!(!(E(TRUE U !((((u10.p147>=1)&&(u27.p220>=1))||((u7.p80>=1)&&(u8.p111>=1))))))))] = FALSE
(forward)formula 12,0,12.094,274584,1,0,490718,20706,3453,972758,1290,149739,289393
FORMULA MultiwaySync-PT-none-CTLFireability-12 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: !(AF(AG(((u6.p63>=1)||(u10.p147>=1)))))
=> equivalent forward existential formula: [FwdG(Init,!(!(E(TRUE U !(((u6.p63>=1)||(u10.p147>=1)))))))] != FALSE
(forward)formula 13,1,12.0951,274584,1,0,490748,20706,3456,972774,1290,149739,289508
FORMULA MultiwaySync-PT-none-CTLFireability-13 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !

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

original formula: (!(E(!(((u7.p96>=1)&&(u8.p106>=1))) U ((u6.p63>=1)||(u7.p95>=1)))) + (u4.p35>=1))
=> equivalent forward existential formula: [(FwdU((Init * !((u4.p35>=1))),!(((u7.p96>=1)&&(u8.p106>=1)))) * ((u6.p63>=1)||(u7.p95>=1)))] = FALSE
(forward)formula 14,0,12.1899,278016,1,0,500341,21156,3537,983403,1291,152738,300191
FORMULA MultiwaySync-PT-none-CTLFireability-14 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

original formula: EG(AF((((u21.p204>=1)&&(u21.p202>=1))||(((u10.p135>=1)&&(u27.p220>=1))||((u6.p63>=1)&&(u27.p220>=1))))))
=> equivalent forward existential formula: [FwdG(Init,!(EG(!((((u21.p204>=1)&&(u21.p202>=1))||(((u10.p135>=1)&&(u27.p220>=1))||((u6.p63>=1)&&(u27.p220>=1))))))))] != FALSE
(forward)formula 15,0,12.1958,278280,1,0,500569,21197,3569,983756,1293,153053,300401
FORMULA MultiwaySync-PT-none-CTLFireability-15 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !

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

ITS tools runner thread asked to quit. Dying gracefully.

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="MultiwaySync-PT-none"
export BK_EXAMINATION="CTLFireability"
export BK_TOOL="irma4mcc-structural"
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/MultiwaySync-PT-none.tgz
mv MultiwaySync-PT-none 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 irma4mcc-structural"
echo " Input is MultiwaySync-PT-none, examination is CTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r115-csrt-152666473700200"
echo "====================================================================="
echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "CTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLFireability" != "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 "CTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLFireability.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 '' CTLFireability.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 ;