fond
Model Checking Contest 2018
8th edition, Bratislava, Slovakia, June 26, 2018
Execution of r248-blw7-152732549600019
Last Updated
June 26, 2018

About the Execution of ITS-Tools for FMS-PT-020

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15751.860 4695.00 8524.00 131.80 TFFFFFFTTTFFFFTF 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 176K
-rw-r--r-- 1 mcc users 3.3K May 15 18:54 CTLCardinality.txt
-rw-r--r-- 1 mcc users 19K May 15 18:54 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.4K 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 5.9K May 15 18:50 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 2.2K May 26 09:26 LTLCardinality.txt
-rw-r--r-- 1 mcc users 9.9K May 26 09:26 LTLCardinality.xml
-rw-r--r-- 1 mcc users 1.7K May 26 09:26 LTLFireability.txt
-rw-r--r-- 1 mcc users 7.3K May 26 09:26 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.5K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 19K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 101 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 339 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 2.6K 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 1.5K May 15 18:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.5K 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 4 May 15 18:50 instance
-rw-r--r-- 1 mcc users 6 May 15 18:50 iscolored
-rw-r--r-- 1 mcc users 16K May 15 18:50 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool itstools
Input is FMS-PT-020, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r248-blw7-152732549600019
=====================================================================


--------------------
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 FMS-PT-020-LTLCardinality-00
FORMULA_NAME FMS-PT-020-LTLCardinality-01
FORMULA_NAME FMS-PT-020-LTLCardinality-02
FORMULA_NAME FMS-PT-020-LTLCardinality-03
FORMULA_NAME FMS-PT-020-LTLCardinality-04
FORMULA_NAME FMS-PT-020-LTLCardinality-05
FORMULA_NAME FMS-PT-020-LTLCardinality-06
FORMULA_NAME FMS-PT-020-LTLCardinality-07
FORMULA_NAME FMS-PT-020-LTLCardinality-08
FORMULA_NAME FMS-PT-020-LTLCardinality-09
FORMULA_NAME FMS-PT-020-LTLCardinality-10
FORMULA_NAME FMS-PT-020-LTLCardinality-11
FORMULA_NAME FMS-PT-020-LTLCardinality-12
FORMULA_NAME FMS-PT-020-LTLCardinality-13
FORMULA_NAME FMS-PT-020-LTLCardinality-14
FORMULA_NAME FMS-PT-020-LTLCardinality-15

=== Now, execution of the tool begins

BK_START 1527956888801

Using solver Z3 to compute partial order matrices.
Built C files in :
/home/mcc/execution
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805151631/bin/its-ltl-linux64, --gc-threshold, 2000000, -i, /home/mcc/execution/LTLCardinality.pnml.gal, -t, CGAL, -LTL, /home/mcc/execution/LTLCardinality.ltl, -c, -stutter-deadlock], workingDir=/home/mcc/execution]

its-ltl command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805151631/bin/its-ltl-linux64 --gc-threshold 2000000 -i /home/mcc/execution/LTLCardinality.pnml.gal -t CGAL -LTL /home/mcc/execution/LTLCardinality.ltl -c -stutter-deadlock
Read 16 LTL properties
Checking formula 0 : !(("(P12wM3<=M1)"))
Formula 0 simplified : !"(P12wM3<=M1)"
Presburger conditions satisfied. Using coverability to approximate state space in K-Induction.
// Phase 1: matrix 20 rows 22 cols
invariant :P12M3 + M3 = 2
invariant :P12 + P2wM2 + P2 + P2M2 + P12wM3 + P12s + -1'M3 + P2wP1 + P2d + P2s = 18
invariant :P1d + P1s + P1wP2 + P12 + P1 + P1wM1 + -1'M1 + P12wM3 + P12s + -1'M3 = 15
invariant :P3s + P3M2 + P3 = 20
invariant :M2 + P2M2 = 1
invariant :P1M1 + M1 = 3
Reverse transition relation is exact ! Faster fixpoint algorithm enabled.
1 unique states visited
0 strongly connected components in search stack
0 transitions explored
1 items max in DFS search stack
38 ticks for the emptiness check
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
STATS,0,0.384326,27100,1,0,5,73662,14,0,758,40965,4
no accepting run found
Formula 0 is TRUE no accepting run found.
FORMULA FMS-PT-020-LTLCardinality-00 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL
Checking formula 1 : !((X(X(X(X("(M2<=P12wM3)"))))))
Formula 1 simplified : !XXXX"(M2<=P12wM3)"
7 unique states visited
7 strongly connected components in search stack
7 transitions explored
7 items max in DFS search stack
20 ticks for the emptiness check
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
STATS,0,0.591164,34264,1,0,11,106144,23,0,816,83399,31
an accepting run exists (use option '-e' to print it)
Formula 1 is FALSE accepting run found.
FORMULA FMS-PT-020-LTLCardinality-01 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL
Checking formula 2 : !((X("(P2wM2<=P1M1)")))
Formula 2 simplified : !X"(P2wM2<=P1M1)"
4 unique states visited
4 strongly connected components in search stack
4 transitions explored
4 items max in DFS search stack
1 ticks for the emptiness check
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
STATS,0,0.593665,34264,1,0,13,106317,26,0,820,83546,38
an accepting run exists (use option '-e' to print it)
Formula 2 is FALSE accepting run found.
FORMULA FMS-PT-020-LTLCardinality-02 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL
Checking formula 3 : !((X("(P2wM2<=P3s)")))
Formula 3 simplified : !X"(P2wM2<=P3s)"
4 unique states visited
4 strongly connected components in search stack
4 transitions explored
4 items max in DFS search stack
0 ticks for the emptiness check
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
STATS,0,0.593985,34564,1,0,13,106322,29,0,824,83552,40
an accepting run exists (use option '-e' to print it)
Formula 3 is FALSE accepting run found.
FORMULA FMS-PT-020-LTLCardinality-03 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL
Checking formula 4 : !((X(G(F(G("(P2>=3)"))))))
Formula 4 simplified : !XGFG"(P2>=3)"
Running compilation step : CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit//lts_install_dir//include, -I., -std=c99, -fPIC, -O3, model.c], workingDir=/home/mcc/execution]
Compilation finished in 528 ms.
Running link step : CommandLine [args=[gcc, -shared, -o, gal.so, model.o], workingDir=/home/mcc/execution]
Link finished in 53 ms.
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, X([](<>([]((LTLAP4==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 515 ms.
FORMULA FMS-PT-020-LTLCardinality-04 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, X(X([](<>((LTLAP5==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 11 ms.
FORMULA FMS-PT-020-LTLCardinality-05 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, <>((<>((LTLAP6==true)))U(<>((LTLAP7==true)))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 20 ms.
FORMULA FMS-PT-020-LTLCardinality-06 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, ((LTLAP8==true))U(((LTLAP9==true))U((LTLAP10==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 10 ms.
FORMULA FMS-PT-020-LTLCardinality-07 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, (((LTLAP11==true))U((LTLAP12==true)))U(((LTLAP13==true))U((LTLAP14==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 9 ms.
FORMULA FMS-PT-020-LTLCardinality-08 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, --when, --ltl, X((LTLAP15==true)), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 9 ms.
FORMULA FMS-PT-020-LTLCardinality-09 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, (LTLAP16==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 10 ms.
FORMULA FMS-PT-020-LTLCardinality-10 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, [](<>(<>([]((LTLAP8==true))))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 9 ms.
FORMULA FMS-PT-020-LTLCardinality-11 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, (LTLAP17==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 16 ms.
FORMULA FMS-PT-020-LTLCardinality-12 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, (LTLAP5==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 11 ms.
FORMULA FMS-PT-020-LTLCardinality-13 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, (LTLAP18==true), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 14 ms.
FORMULA FMS-PT-020-LTLCardinality-14 TRUE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
Running LTSmin : CommandLine [args=[/home/mcc/BenchKit//lts_install_dir//bin/pins2lts-mc, ./gal.so, --threads=1, -p, --pins-guards, --when, --ltl, ((LTLAP19==true))U([]((LTLAP20==true))), --buchi-type=spotba], workingDir=/home/mcc/execution]
LTSmin run took 29 ms.
FORMULA FMS-PT-020-LTLCardinality-15 FALSE TECHNIQUES PARTIAL_ORDER EXPLICIT LTSMIN SAT_SMT
ITS tools runner thread asked to quit. Dying gracefully.

BK_STOP 1527956893496

--------------------
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 LTLCardinality -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -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 LTLCardinality -z3path /home/mcc/BenchKit//z3/bin/z3 -yices2path /home/mcc/BenchKit//yices/bin/yices -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -smt -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss8m -Xms40m -Xmx8192m -Dfile.encoding=UTF-8 -Dosgi.requiredJavaVersion=1.6
Jun 02, 2018 4:28:10 PM fr.lip6.move.gal.application.Application start
INFO: Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLCardinality, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -its, -ltsminpath, /home/mcc/BenchKit//lts_install_dir/, -smt]
Jun 02, 2018 4:28:10 PM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /home/mcc/execution/model.pnml
Jun 02, 2018 4:28:10 PM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 30 ms
Jun 02, 2018 4:28:10 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 22 places.
Jun 02, 2018 4:28:10 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 20 transitions.
Jun 02, 2018 4:28:10 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/model.pnml.img.gal : 14 ms
Jun 02, 2018 4:28:10 PM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 37 ms
Jun 02, 2018 4:28:10 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/LTLCardinality.pnml.gal : 1 ms
Jun 02, 2018 4:28:10 PM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSLTLTools
INFO: Time to serialize properties into /home/mcc/execution/LTLCardinality.ltl : 1 ms
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.semantics.DeterministicNextBuilder getDeterministicNext
INFO: Input system was already deterministic with 20 transitions.
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver computeAndDeclareInvariants
INFO: Computed 6 place invariants in 7 ms
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.KInductionSolver init
INFO: Proved 22 variables to be positive in 99 ms
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may disable matrix : 20 transitions.
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of disable matrix completed :0/20 took 0 ms. Total solver calls (SAT/UNSAT): 0(0/0)
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Complete disable matrix. took 1 ms. Total solver calls (SAT/UNSAT): 0(0/0)
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeAblingMatrix
INFO: Computing symmetric may enable matrix : 20 transitions.
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Complete enable matrix. took 0 ms. Total solver calls (SAT/UNSAT): 0(0/0)
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeCoEnablingMatrix
INFO: Computing symmetric co enabling matrix : 20 transitions.
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Finished co-enabling matrix. took 220 ms. Total solver calls (SAT/UNSAT): 82(80/2)
Jun 02, 2018 4:28:11 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver computeDoNotAccord
INFO: Computing Do-Not-Accords matrix : 20 transitions.
Jun 02, 2018 4:28:12 PM fr.lip6.move.gal.gal2smt.bmc.NecessaryEnablingsolver printStats
INFO: Computation of Completed DNA matrix. took 93 ms. Total solver calls (SAT/UNSAT): 24(0/24)
Jun 02, 2018 4:28:12 PM fr.lip6.move.gal.gal2pins.Gal2PinsTransformerNext transform
INFO: Built C files in 979ms conformant to PINS in folder :/home/mcc/execution

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="FMS-PT-020"
export BK_EXAMINATION="LTLCardinality"
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

tar xzf /home/mcc/BenchKit/INPUTS/FMS-PT-020.tgz
mv FMS-PT-020 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 itstools"
echo " Input is FMS-PT-020, examination is LTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r248-blw7-152732549600019"
echo "====================================================================="
echo
echo "--------------------"
echo "content from stdout:"
echo
echo "=== Data for post analysis generated by BenchKit (invocation template)"
echo
if [ "LTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLCardinality" != "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 "LTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLCardinality.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 '' LTLCardinality.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 ;