Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2021-input.r185-tajo-162089425400181.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2021-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 RERS17pb115-PT-4, examination is ReachabilityDeadlock
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r185-tajo-162089425400181
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 70M
-rw-r--r-- 1 mcc users 17K May 5 16:58 CTLCardinality.txt
-rw-r--r-- 1 mcc users 154K May 10 09:44 CTLCardinality.xml
-rw-r--r-- 1 mcc users 17K May 5 16:58 CTLFireability.txt
-rw-r--r-- 1 mcc users 86K May 10 09:44 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 6 14:48 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.2K Mar 28 16:30 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Mar 28 16:30 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.8K Mar 28 16:30 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Mar 28 16:30 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.2K Mar 27 10:19 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 15K Mar 27 10:19 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.4K Mar 25 13:31 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 15K Mar 25 13:31 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Mar 22 08:15 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Mar 22 08:15 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 5 16:51 equiv_col
-rw-r--r-- 1 mcc users 2 May 5 16:51 instance
-rw-r--r-- 1 mcc users 6 May 5 16:51 iscolored
-rw-r--r-- 1 mcc users 69M May 5 16:51 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 1621335762542

Running Version 0
[2021-05-18 11:02:44] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityDeadlock, -spotpath, /home/mcc/BenchKit/bin//..//ltlfilt, -z3path, /home/mcc/BenchKit/bin//..//z3/bin/z3, -yices2path, /home/mcc/BenchKit/bin//..//yices/bin/yices, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 1800]
[2021-05-18 11:02:44] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2021-05-18 11:02:46] [INFO ] Load time of PNML (sax parser for PT used): 2219 ms
[2021-05-18 11:02:46] [INFO ] Transformed 1399 places.
[2021-05-18 11:02:46] [INFO ] Transformed 144369 transitions.
[2021-05-18 11:02:46] [INFO ] Parsed PT model containing 1399 places and 144369 transitions in 2824 ms.
Parsed 1 properties from file /home/mcc/execution/ReachabilityDeadlock.xml in 10 ms.
Working with output stream class java.io.PrintStream
Built sparse matrix representations for Structural reductions in 59 ms.429445KB memory used
Starting structural reductions, iteration 0 : 1399/1399 places, 144369/144369 transitions.
Ensure Unique test removed 18 places
Iterating post reduction 0 with 18 rules applied. Total rules applied 18 place count 1381 transition count 144369
Reduce places removed 1 places and 1 transitions.
Iterating global reduction 1 with 1 rules applied. Total rules applied 19 place count 1380 transition count 144368
Applied a total of 19 rules in 4988 ms. Remains 1380 /1399 variables (removed 19) and now considering 144368/144369 (removed 1) transitions.
Finished structural reductions, in 1 iterations. Remains : 1380/1399 places, 144368/144369 transitions.
Interrupted Random walk after 233125 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=7 )
[2021-05-18 11:03:23] [INFO ] Flow matrix only has 81237 transitions (discarded 63131 similar events)
// Phase 1: matrix 81237 rows 1380 cols
[2021-05-18 11:03:24] [INFO ] Computed 19 place invariants in 574 ms
[2021-05-18 11:03:47] [INFO ] [Real]Absence check using 19 positive place invariants in 80 ms returned sat
[2021-05-18 11:03:47] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-18 11:04:05] [INFO ] [Real]Absence check using state equation in 18014 ms returned sat
[2021-05-18 11:04:06] [INFO ] Solution in real domain found non-integer solution.
[2021-05-18 11:04:28] [INFO ] [Nat]Absence check using 19 positive place invariants in 60 ms returned sat
[2021-05-18 11:04:28] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-18 11:04:46] [INFO ] [Nat]Absence check using state equation in 18909 ms returned sat
[2021-05-18 11:04:50] [INFO ] State equation strengthened by 2245 read => feed constraints.
[2021-05-18 11:05:37] [INFO ] SMT solver returned unknown. Retrying;
[2021-05-18 11:05:40] [INFO ] [Nat]Added 2245 Read/Feed constraints in 49674 ms returned unknown
Interrupted Random directed walk after 161273 steps, including 0 resets, run timeout after 30006 ms. (steps per millisecond=5 )
Interrupted Random walk after 244846 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=8 )
Interrupted Random directed walk after 157722 steps, including 0 resets, run timeout after 30004 ms. (steps per millisecond=5 )
Interrupted Random walk after 305166 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=10 )
Starting structural reductions, iteration 0 : 1380/1380 places, 144368/144368 transitions.
Applied a total of 0 rules in 2229 ms. Remains 1380 /1380 variables (removed 0) and now considering 144368/144368 (removed 0) transitions.
[2021-05-18 11:07:42] [INFO ] Flow matrix only has 81237 transitions (discarded 63131 similar events)
// Phase 1: matrix 81237 rows 1380 cols
[2021-05-18 11:07:43] [INFO ] Computed 19 place invariants in 335 ms
[2021-05-18 11:07:50] [INFO ] Implicit Places using invariants in 7701 ms returned []
Implicit Place search using SMT only with invariants took 7702 ms to find 0 implicit places.
[2021-05-18 11:07:50] [INFO ] Flow matrix only has 81237 transitions (discarded 63131 similar events)
// Phase 1: matrix 81237 rows 1380 cols
[2021-05-18 11:07:50] [INFO ] Computed 19 place invariants in 306 ms
[2021-05-18 11:08:20] [INFO ] Performed 97127/144368 'is it Dead' test of which 0 returned DEAD in 30 seconds.
[2021-05-18 11:08:35] [INFO ] Dead Transitions using invariants and state equation in 44833 ms returned []
Finished structural reductions, in 1 iterations. Remains : 1380/1380 places, 144368/144368 transitions.
Interrupted Random walk after 300790 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=10 )
[2021-05-18 11:09:05] [INFO ] Flow matrix only has 81237 transitions (discarded 63131 similar events)
// Phase 1: matrix 81237 rows 1380 cols
[2021-05-18 11:09:05] [INFO ] Computed 19 place invariants in 397 ms
[2021-05-18 11:09:28] [INFO ] [Real]Absence check using 19 positive place invariants in 74 ms returned sat
[2021-05-18 11:09:28] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-18 11:09:47] [INFO ] [Real]Absence check using state equation in 19160 ms returned sat
[2021-05-18 11:09:48] [INFO ] Solution in real domain found non-integer solution.
[2021-05-18 11:10:11] [INFO ] [Nat]Absence check using 19 positive place invariants in 71 ms returned sat
[2021-05-18 11:10:11] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-18 11:10:30] [INFO ] [Nat]Absence check using state equation in 18860 ms returned sat
[2021-05-18 11:10:35] [INFO ] State equation strengthened by 2245 read => feed constraints.
[2021-05-18 11:11:23] [INFO ] SMT solver returned unknown. Retrying;
[2021-05-18 11:11:26] [INFO ] [Nat]Added 2245 Read/Feed constraints in 51557 ms returned unknown
Interrupted Random directed walk after 157453 steps, including 0 resets, run timeout after 30006 ms. (steps per millisecond=5 )
Interrupted Random walk after 309130 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=10 )
Interrupted Random directed walk after 162488 steps, including 0 resets, run timeout after 30002 ms. (steps per millisecond=5 )
Interrupted Random walk after 325755 steps, including 0 resets, run timeout after 30001 ms. (steps per millisecond=10 )
[2021-05-18 11:13:32] [INFO ] Flatten gal took : 4758 ms
Using solver Z3 to compute partial order matrices.
Built C files in :
/tmp/ltsmin3720309790605253923
[2021-05-18 11:13:35] [INFO ] Too many transitions (144369) to apply POR reductions. Disabling POR matrices.
[2021-05-18 11:13:37] [INFO ] Built C files in 1838ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin3720309790605253923
Running compilation step : CommandLine [args=[gcc, -c, -I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin3720309790605253923]
[2021-05-18 11:13:39] [INFO ] Applying decomposition
[2021-05-18 11:13:43] [INFO ] Flatten gal took : 4355 ms
Converted graph to binary with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/convert-linux64, -i, /tmp/graph14864905673910070161.txt, -o, /tmp/graph14864905673910070161.bin, -w, /tmp/graph14864905673910070161.weights], workingDir=null]
Built communities with : CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202104292328/bin/louvain-linux64, /tmp/graph14864905673910070161.bin, -l, -1, -v, -w, /tmp/graph14864905673910070161.weights, -q, 0, -e, 0.001], workingDir=null]
[2021-05-18 11:13:55] [INFO ] Decomposing Gal with order
[2021-05-18 11:13:55] [INFO ] Rewriting arrays to variables to allow decomposition.
[2021-05-18 11:14:09] [INFO ] Removed a total of 435525 redundant transitions.
[2021-05-18 11:14:11] [INFO ] Flatten gal took : 9286 ms
[2021-05-18 11:14:34] [INFO ] Fuse similar labels procedure discarded/fused a total of 2576 labels/synchronizations in 16892 ms.
[2021-05-18 11:14:34] [INFO ] Time to serialize gal into /tmp/ReachabilityDeadlock3350036239043513855.gal : 585 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-ctl-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityDeadlock3350036239043513855.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_1.0.0.202104292328/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityDeadlock3350036239043513855.gal -t CGAL -ctl DEADLOCK
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/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin3720309790605253923] killed by timeout after 180 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/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202104292328/bin/include/, -I., -std=c99, -fPIC, -O2, model.c], workingDir=/tmp/ltsmin3720309790605253923] killed by timeout after 180 SECONDS
at fr.lip6.move.gal.application.LTSminRunner$1.run(LTSminRunner.java:79)
at java.base/java.lang.Thread.run(Thread.java:834)
No direction supplied, using forward translation only.
ITS-tools command line returned an error code 137
[2021-05-18 11:20:49] [INFO ] Flatten gal took : 8959 ms
[2021-05-18 11:20:49] [INFO ] Time to serialize gal into /tmp/ReachabilityDeadlock9329003468448102748.gal : 623 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-ctl-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityDeadlock9329003468448102748.gal, -t, CGAL, -ctl, DEADLOCK, --gen-order, FOLLOW], workingDir=/home/mcc/execution]

its-ctl command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityDeadlock9329003468448102748.gal -t CGAL -ctl DEADLOCK --gen-order FOLLOW
ITS-tools command line returned an error code 137
[2021-05-18 11:21:28] [INFO ] Flatten gal took : 7520 ms
[2021-05-18 11:21:37] [INFO ] Input system was already deterministic with 144369 transitions.
[2021-05-18 11:21:38] [INFO ] Transformed 1399 places.
[2021-05-18 11:21:38] [INFO ] Transformed 144369 transitions.
Running greatSPN : CommandLine [args=[/home/mcc/BenchKit/bin//..//greatspn//bin/pinvar, /home/mcc/execution/gspn], workingDir=/home/mcc/execution]
P-invariant computation with GreatSPN timed out. Skipping.
Running greatSPN : CommandLine [args=[/home/mcc/BenchKit/bin//..//greatspn//bin/RGMEDD2, /home/mcc/execution/gspn, -META, -varord-only], workingDir=/home/mcc/execution]
Run of greatSPN captured in /home/mcc/execution/outPut.txt
java.lang.NullPointerException
at fr.lip6.move.gal.application.Application.computeOrderWithGreatSPN(Application.java:889)
at fr.lip6.move.gal.application.Application.runMultiITS(Application.java:835)
at fr.lip6.move.gal.application.Application.startNoEx(Application.java:515)
at fr.lip6.move.gal.application.Application.start(Application.java:140)
at fr.lip6.move.gal.itscl.application.Application.start(Application.java:43)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
at org.eclipse.equinox.launcher.Main.run(Main.java:1461)
at org.eclipse.equinox.launcher.Main.main(Main.java:1434)
[2021-05-18 11:22:15] [INFO ] Time to serialize gal into /tmp/ReachabilityDeadlock8120638589847893794.gal : 310 ms
Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202104292328/bin/its-ctl-linux64, --gc-threshold, 2000000, --quiet, -i, /tmp/ReachabilityDeadlock8120638589847893794.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_1.0.0.202104292328/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /tmp/ReachabilityDeadlock8120638589847893794.gal -t CGAL -ctl DEADLOCK --load-order /home/mcc/execution/model.ord --gen-order FOLLOW
ITS-tools command line returned an error code 137

BK_STOP 1621336960811

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

+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityDeadlock = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution ReachabilityDeadlock -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ cut -d . -f 9
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202104292328.jar
+ VERSION=0
+ echo 'Running Version 0'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination ReachabilityDeadlock -spotpath /home/mcc/BenchKit/bin//..//ltlfilt -z3path /home/mcc/BenchKit/bin//..//z3/bin/z3 -yices2path /home/mcc/BenchKit/bin//..//yices/bin/yices -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800 -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss128m -Xms40m -Xmx16000m

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="RERS17pb115-PT-4"
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"
export BK_BIN_PATH="/home/mcc/BenchKit/bin/"

# 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 RERS17pb115-PT-4, 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 r185-tajo-162089425400181"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/RERS17pb115-PT-4.tgz
mv RERS17pb115-PT-4 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 ;