Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2020-input.r147-smll-158961520500006.qcow2', fmt=qcow2 size=4294967296 backing_file='/data/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 RERS17pb113-PT-2, examination is ReachabilityDeadlock
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r147-smll-158961520500006
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 15M
-rw-r--r-- 1 mcc users 3.7K Apr 12 07:07 CTLCardinality.txt
-rw-r--r-- 1 mcc users 21K Apr 12 07:07 CTLCardinality.xml
-rw-r--r-- 1 mcc users 3.5K Apr 11 08:01 CTLFireability.txt
-rw-r--r-- 1 mcc users 19K Apr 11 08:01 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 14 12:48 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Apr 28 14:02 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.6K Apr 14 12:48 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K Apr 28 14:02 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.7K Apr 10 13:59 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 20K Apr 10 13:59 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.0K Apr 9 20:29 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 13K Apr 9 20:29 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Apr 10 22:25 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Apr 10 22:24 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 24 05:37 equiv_col
-rw-r--r-- 1 mcc users 2 Mar 24 05:37 instance
-rw-r--r-- 1 mcc users 6 Mar 24 05:37 iscolored
-rw-r--r-- 1 mcc users 15M 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

FORMULA_NAME ReachabilityDeadlock

=== Now, execution of the tool begins

BK_START 1589837714127

[2020-05-18 21:35:16] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityDeadlock, -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, 1800]
[2020-05-18 21:35:16] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2020-05-18 21:35:18] [INFO ] Load time of PNML (sax parser for PT used): 1308 ms
[2020-05-18 21:35:18] [INFO ] Transformed 639 places.
[2020-05-18 21:35:18] [INFO ] Transformed 31353 transitions.
[2020-05-18 21:35:18] [INFO ] Found NUPN structural information;
[2020-05-18 21:35:18] [INFO ] Parsed PT model containing 639 places and 31353 transitions in 1558 ms.
Parsed 1 properties from file /home/mcc/execution/ReachabilityDeadlock.xml in 388 ms.
Working with output stream class java.io.PrintStream
Built sparse matrix representations for Structural reductions in 41 ms.73883KB memory used
Starting structural reductions, iteration 0 : 639/639 places, 31353/31353 transitions.
Ensure Unique test removed 12 places
Iterating post reduction 0 with 12 rules applied. Total rules applied 12 place count 627 transition count 31353
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 1 with 1 rules applied. Total rules applied 13 place count 626 transition count 31352
Applied a total of 13 rules in 855 ms. Remains 626 /639 variables (removed 13) and now considering 31352/31353 (removed 1) transitions.
Finished structural reductions, in 1 iterations. Remains : 626/639 places, 31352/31353 transitions.
Interrupted Parikh directed walk after 944052 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=31 )
[2020-05-18 21:35:49] [INFO ] Flow matrix only has 18325 transitions (discarded 13027 similar events)
// Phase 1: matrix 18325 rows 626 cols
[2020-05-18 21:35:50] [INFO ] Computed 13 place invariants in 190 ms
[2020-05-18 21:36:14] [INFO ] [Real]Absence check using 13 positive place invariants in 62 ms returned sat
[2020-05-18 21:36:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-05-18 21:36:57] [INFO ] [Real]Absence check using state equation in 42479 ms returned sat
[2020-05-18 21:36:57] [INFO ] Solution in real domain found non-integer solution.
[2020-05-18 21:37:19] [INFO ] [Nat]Absence check using 13 positive place invariants in 74 ms returned sat
[2020-05-18 21:37:19] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2020-05-18 21:38:01] [INFO ] [Nat]Absence check using state equation in 41926 ms returned sat
[2020-05-18 21:38:01] [INFO ] State equation strengthened by 829 read => feed constraints.
[2020-05-18 21:38:10] [INFO ] SMT solver returned unknown. Retrying;
[2020-05-18 21:38:13] [INFO ] [Nat]Added 829 Read/Feed constraints in 11703 ms returned unknown
Random directed walk for 500000 steps, including 0 resets, run took 24967 ms (no deadlock found). (steps per millisecond=20 )
Random walk for 500000 steps, including 0 resets, run took 14648 ms (no deadlock found). (steps per millisecond=34 )
Random directed walk for 500012 steps, including 0 resets, run took 26766 ms (no deadlock found). (steps per millisecond=18 )
Random walk for 500000 steps, including 0 resets, run took 15471 ms (no deadlock found). (steps per millisecond=32 )
[2020-05-18 21:39:37] [INFO ] Flatten gal took : 1814 ms
Using solver Z3 to compute partial order matrices.
Built C files in :
/home/mcc/execution
[2020-05-18 21:39:39] [INFO ] Applying decomposition
[2020-05-18 21:39:40] [INFO ] Input system was already deterministic with 31353 transitions.
[2020-05-18 21:39:40] [INFO ] Too many transitions (31353) to apply POR reductions. Disabling POR matrices.
[2020-05-18 21:39:41] [INFO ] Flatten gal took : 1300 ms
[2020-05-18 21:39:43] [INFO ] Built C files in 4101ms conformant to PINS in folder :/home/mcc/execution
Running compilation step : CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit//lts_install_dir//include, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/home/mcc/execution]
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/graph6790317861020231634.txt, -o, /tmp/graph6790317861020231634.bin, -w, /tmp/graph6790317861020231634.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/graph6790317861020231634.bin, -l, -1, -v, -w, /tmp/graph6790317861020231634.weights, -q, 0, -e, 0.001], workingDir=null]
[2020-05-18 21:39:44] [INFO ] Decomposing Gal with order
[2020-05-18 21:39:44] [INFO ] Rewriting arrays to variables to allow decomposition.
[2020-05-18 21:39:48] [INFO ] Removed a total of 91910 redundant transitions.
[2020-05-18 21:39:49] [INFO ] Flatten gal took : 2962 ms
[2020-05-18 21:39:52] [INFO ] Fuse similar labels procedure discarded/fused a total of 1459 labels/synchronizations in 1541 ms.
[2020-05-18 21:39:52] [INFO ] Time to serialize gal into /home/mcc/execution/ReachabilityDeadlock.pnml.gal : 204 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/ReachabilityDeadlock.pnml.gal, -t, CGAL, -ctl, DEADLOCK], 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/ReachabilityDeadlock.pnml.gal -t CGAL -ctl DEADLOCK
No direction supplied, using forward translation only.
built 47 ordering constraints for composite.
built 22 ordering constraints for composite.
built 2318 ordering constraints for composite.
built 47 ordering constraints for composite.
built 387 ordering constraints for composite.
built 58 ordering constraints for composite.
built 29 ordering constraints for composite.
built 14 ordering constraints for composite.
built 16 ordering constraints for composite.
built 30 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 55 ordering constraints for composite.
built 27 ordering constraints for composite.
built 14 ordering constraints for composite.
built 14 ordering constraints for composite.
built 30 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 57 ordering constraints for composite.
built 28 ordering constraints for composite.
built 14 ordering constraints for composite.
built 16 ordering constraints for composite.
built 30 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 59 ordering constraints for composite.
built 28 ordering constraints for composite.
built 14 ordering constraints for composite.
built 14 ordering constraints for composite.
built 31 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 58 ordering constraints for composite.
built 31 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 28 ordering constraints for composite.
built 14 ordering constraints for composite.
built 16 ordering constraints for composite.
built 62 ordering constraints for composite.
built 32 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 30 ordering constraints for composite.
built 14 ordering constraints for composite.
built 16 ordering constraints for composite.
built 47 ordering constraints for composite.
built 24 ordering constraints for composite.
built 12 ordering constraints for composite.
built 12 ordering constraints for composite.
built 23 ordering constraints for composite.
built 11 ordering constraints for composite.
built 12 ordering constraints for composite.
built 93 ordering constraints for composite.
built 47 ordering constraints for composite.
built 23 ordering constraints for composite.
built 12 ordering constraints for composite.
built 11 ordering constraints for composite.
built 24 ordering constraints for composite.
built 12 ordering constraints for composite.
built 12 ordering constraints for composite.
built 46 ordering constraints for composite.
built 23 ordering constraints for composite.
built 11 ordering constraints for composite.
built 12 ordering constraints for composite.
built 23 ordering constraints for composite.
built 12 ordering constraints for composite.
built 11 ordering constraints for composite.
built 47 ordering constraints for composite.
built 93 ordering constraints for composite.
built 46 ordering constraints for composite.
built 23 ordering constraints for composite.
built 12 ordering constraints for composite.
built 11 ordering constraints for composite.
built 23 ordering constraints for composite.
built 11 ordering constraints for composite.
built 12 ordering constraints for composite.
built 46 ordering constraints for composite.
built 23 ordering constraints for composite.
built 12 ordering constraints for composite.
built 12 ordering constraints for composite.
built 23 ordering constraints for composite.
built 12 ordering constraints for composite.
built 11 ordering constraints for composite.
built 337 ordering constraints for composite.
built 60 ordering constraints for composite.
built 32 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 28 ordering constraints for composite.
built 14 ordering constraints for composite.
built 14 ordering constraints for composite.
built 291 ordering constraints for composite.
built 24 ordering constraints for composite.
built 12 ordering constraints for composite.
built 12 ordering constraints for composite.
built 496 ordering constraints for composite.
built 16 ordering constraints for composite.
built 14 ordering constraints for composite.
built 14 ordering constraints for composite.
built 12 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 12 ordering constraints for composite.
built 158 ordering constraints for composite.
built 16 ordering constraints for composite.
built 12 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 16 ordering constraints for composite.
built 12 ordering constraints for composite.
built 16 ordering constraints for composite.
built 134 ordering constraints for composite.
built 16 ordering constraints for composite.
built 11 ordering constraints for composite.
built 12 ordering constraints for composite.
built 11 ordering constraints for composite.
built 12 ordering constraints for composite.
built 14 ordering constraints for composite.
built 12 ordering constraints for composite.
built 14 ordering constraints for composite.
built 22 ordering constraints for composite.
built 11 ordering constraints for composite.
built 11 ordering constraints for composite.
built 45 ordering constraints for composite.
built 22 ordering constraints for composite.
built 11 ordering constraints for composite.
built 11 ordering constraints for composite.
built 24 ordering constraints for composite.
built 12 ordering constraints for composite.
built 12 ordering constraints for composite.
built 46 ordering constraints for composite.
WARNING : LTS min runner thread failed on error :java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit//lts_install_dir//include, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/home/mcc/execution] killed by timeout after 400 SECONDS
java.lang.RuntimeException: Compilation or link of executable timed out.java.util.concurrent.TimeoutException: Subprocess running CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit//lts_install_dir//include, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/home/mcc/execution] killed by timeout after 400 SECONDS
at fr.lip6.move.gal.application.LTSminRunner$1.run(LTSminRunner.java:80)
at java.base/java.lang.Thread.run(Thread.java:834)
ITS-tools command line returned an error code 137
[2020-05-18 21:48:30] [INFO ] Applying decomposition
[2020-05-18 21:48:33] [INFO ] Flatten gal took : 2461 ms
[2020-05-18 21:48:34] [INFO ] Decomposing Gal with order
[2020-05-18 21:48:34] [INFO ] Rewriting arrays to variables to allow decomposition.
[2020-05-18 21:48:51] [INFO ] Removed a total of 59926 redundant transitions.
[2020-05-18 21:48:51] [INFO ] Flatten gal took : 15950 ms
[2020-05-18 21:48:54] [INFO ] Fuse similar labels procedure discarded/fused a total of 2721 labels/synchronizations in 2246 ms.
[2020-05-18 21:48:54] [INFO ] Time to serialize gal into /home/mcc/execution/ReachabilityDeadlock.pnml.gal : 28 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/ReachabilityDeadlock.pnml.gal, -t, CGAL, -ctl, DEADLOCK], 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/ReachabilityDeadlock.pnml.gal -t CGAL -ctl DEADLOCK
No direction supplied, using forward translation only.
built 38 ordering constraints for composite.
Detected timeout of ITS tools.
[2020-05-18 22:00:25] [INFO ] Flatten gal took : 1341 ms
[2020-05-18 22:00:27] [INFO ] Input system was already deterministic with 31353 transitions.
[2020-05-18 22:00:27] [INFO ] Transformed 639 places.
[2020-05-18 22:00:28] [INFO ] Transformed 31353 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
[2020-05-18 22:00:31] [INFO ] Time to serialize gal into /home/mcc/execution/ReachabilityDeadlock.pnml.gal : 113 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/ReachabilityDeadlock.pnml.gal, -t, CGAL, -ctl, DEADLOCK, --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/ReachabilityDeadlock.pnml.gal -t CGAL -ctl DEADLOCK --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.

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
+ [[ ReachabilityDeadlock = StateSpace ]]
+ /home/mcc/BenchKit//runeclipse.sh /home/mcc/execution ReachabilityDeadlock -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -greatspnpath /home/mcc/BenchKit//greatspn/ -order META -manyOrder -smt -timeout 1800
+ 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 ReachabilityDeadlock -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 1800 -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="RERS17pb113-PT-2"
export BK_EXAMINATION="ReachabilityDeadlock"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="1800"
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 RERS17pb113-PT-2, examination is ReachabilityDeadlock"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r147-smll-158961520500006"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/RERS17pb113-PT-2.tgz
mv RERS17pb113-PT-2 execution
cd execution
if [ "ReachabilityDeadlock" = "ReachabilityDeadlock" ] || [ "ReachabilityDeadlock" = "UpperBounds" ] || [ "ReachabilityDeadlock" = "QuasiLiveness" ] || [ "ReachabilityDeadlock" = "StableMarking" ] || [ "ReachabilityDeadlock" = "Liveness" ] || [ "ReachabilityDeadlock" = "OneSafe" ] || [ "ReachabilityDeadlock" = "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 [ "ReachabilityDeadlock" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityDeadlock" != "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 "ReachabilityDeadlock.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityDeadlock.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityDeadlock.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 '' ReachabilityDeadlock.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityDeadlock" = "ReachabilityDeadlock" ] || [ "ReachabilityDeadlock" = "QuasiLiveness" ] || [ "ReachabilityDeadlock" = "StableMarking" ] || [ "ReachabilityDeadlock" = "Liveness" ] || [ "ReachabilityDeadlock" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityDeadlock"
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 ;