Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2022-input.r121-smll-165264480700102.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2022-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
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=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is HealthRecord-PT-12, examination is QuasiLiveness
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r121-smll-165264480700102
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 280K
-rw-r--r-- 1 mcc users 6.2K Apr 30 11:28 CTLCardinality.txt
-rw-r--r-- 1 mcc users 68K Apr 30 11:28 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.6K Apr 30 11:21 CTLFireability.txt
-rw-r--r-- 1 mcc users 52K Apr 30 11:21 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.9K May 9 07:59 LTLCardinality.txt
-rw-r--r-- 1 mcc users 28K May 9 07:59 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K May 9 07:59 LTLFireability.txt
-rw-r--r-- 1 mcc users 16K May 9 07:59 LTLFireability.xml
-rw-r--r-- 1 mcc users 1.6K May 9 07:59 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K May 9 07:59 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 10 09:34 equiv_col
-rw-r--r-- 1 mcc users 3 May 10 09:34 instance
-rw-r--r-- 1 mcc users 6 May 10 09:34 iscolored
-rw-r--r-- 1 mcc users 71K May 10 09:34 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 QuasiLiveness

=== Now, execution of the tool begins

BK_START 1652723147039

Running Version 202205111006
[2022-05-16 17:45:48] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, QuasiLiveness, -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]
[2022-05-16 17:45:48] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-05-16 17:45:49] [INFO ] Load time of PNML (sax parser for PT used): 190 ms
[2022-05-16 17:45:49] [INFO ] Transformed 160 places.
[2022-05-16 17:45:49] [INFO ] Transformed 340 transitions.
[2022-05-16 17:45:49] [INFO ] Found NUPN structural information;
[2022-05-16 17:45:49] [INFO ] Parsed PT model containing 160 places and 340 transitions in 424 ms.
Starting structural reductions in LIVENESS mode, iteration 0 : 160/160 places, 340/340 transitions.
Graph (trivial) has 274 edges and 160 vertex of which 8 / 160 are part of one of the 4 SCC in 9 ms
Free SCC test removed 4 places
Ensure Unique test removed 32 transitions
Reduce isomorphic transitions removed 32 transitions.
Discarding 87 places :
Symmetric choice reduction at 0 with 87 rule applications. Total rules 88 place count 69 transition count 134
Iterating global reduction 0 with 87 rules applied. Total rules applied 175 place count 69 transition count 134
Discarding 10 places :
Symmetric choice reduction at 0 with 10 rule applications. Total rules 185 place count 59 transition count 114
Iterating global reduction 0 with 10 rules applied. Total rules applied 195 place count 59 transition count 114
Ensure Unique test removed 9 transitions
Reduce isomorphic transitions removed 9 transitions.
Iterating post reduction 0 with 9 rules applied. Total rules applied 204 place count 59 transition count 105
Discarding 3 places :
Symmetric choice reduction at 1 with 3 rule applications. Total rules 207 place count 56 transition count 96
Iterating global reduction 1 with 3 rules applied. Total rules applied 210 place count 56 transition count 96
Discarding 3 places :
Symmetric choice reduction at 1 with 3 rule applications. Total rules 213 place count 53 transition count 90
Iterating global reduction 1 with 3 rules applied. Total rules applied 216 place count 53 transition count 90
Ensure Unique test removed 9 transitions
Reduce isomorphic transitions removed 9 transitions.
Iterating post reduction 1 with 9 rules applied. Total rules applied 225 place count 53 transition count 81
Performed 5 Post agglomeration using F-continuation condition.Transition count delta: -31
Deduced a syphon composed of 5 places in 1 ms
Reduce places removed 5 places and 0 transitions.
Iterating global reduction 2 with 10 rules applied. Total rules applied 235 place count 48 transition count 112
Applied a total of 235 rules in 90 ms. Remains 48 /160 variables (removed 112) and now considering 112/340 (removed 228) transitions.
[2022-05-16 17:45:49] [INFO ] Flow matrix only has 86 transitions (discarded 26 similar events)
// Phase 1: matrix 86 rows 48 cols
[2022-05-16 17:45:49] [INFO ] Computed 18 place invariants in 14 ms
[2022-05-16 17:45:49] [INFO ] Implicit Places using invariants in 268 ms returned []
[2022-05-16 17:45:49] [INFO ] Flow matrix only has 86 transitions (discarded 26 similar events)
// Phase 1: matrix 86 rows 48 cols
[2022-05-16 17:45:49] [INFO ] Computed 18 place invariants in 4 ms
[2022-05-16 17:45:49] [INFO ] State equation strengthened by 16 read => feed constraints.
[2022-05-16 17:45:49] [INFO ] Implicit Places using invariants and state equation in 146 ms returned []
Implicit Place search using SMT with State Equation took 467 ms to find 0 implicit places.
[2022-05-16 17:45:49] [INFO ] Flow matrix only has 86 transitions (discarded 26 similar events)
// Phase 1: matrix 86 rows 48 cols
[2022-05-16 17:45:49] [INFO ] Computed 18 place invariants in 4 ms
[2022-05-16 17:45:50] [INFO ] Dead Transitions using invariants and state equation in 166 ms found 0 transitions.
Starting structural reductions in LIVENESS mode, iteration 1 : 48/160 places, 112/340 transitions.
Finished structural reductions, in 1 iterations. Remains : 48/160 places, 112/340 transitions.
Discarding 77 transitions out of 112. Remains 35
Initial state reduction rules removed 1 formulas.
Incomplete random walk after 10000 steps, including 1364 resets, run finished after 750 ms. (steps per millisecond=13 ) properties (out of 34) seen :15
Incomplete Best-First random walk after 1001 steps, including 19 resets, run finished after 7 ms. (steps per millisecond=143 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 18 resets, run finished after 7 ms. (steps per millisecond=143 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 16 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 23 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 25 resets, run finished after 14 ms. (steps per millisecond=71 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 19 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 19 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 21 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1000 steps, including 20 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 18 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 19 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 18 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 20 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 19 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 18 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 19 resets, run finished after 22 ms. (steps per millisecond=45 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 20 resets, run finished after 11 ms. (steps per millisecond=91 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 18 resets, run finished after 12 ms. (steps per millisecond=83 ) properties (out of 19) seen :0
Incomplete Best-First random walk after 1001 steps, including 11 resets, run finished after 9 ms. (steps per millisecond=111 ) properties (out of 19) seen :0
Running SMT prover for 19 properties.
[2022-05-16 17:45:51] [INFO ] Flow matrix only has 86 transitions (discarded 26 similar events)
// Phase 1: matrix 86 rows 48 cols
[2022-05-16 17:45:51] [INFO ] Computed 18 place invariants in 2 ms
[2022-05-16 17:45:51] [INFO ] [Real]Absence check using 10 positive place invariants in 4 ms returned sat
[2022-05-16 17:45:51] [INFO ] [Real]Absence check using 10 positive and 8 generalized place invariants in 3 ms returned sat
[2022-05-16 17:45:51] [INFO ] After 204ms SMT Verify possible using state equation in real domain returned unsat :0 sat :3 real:16
[2022-05-16 17:45:51] [INFO ] State equation strengthened by 16 read => feed constraints.
[2022-05-16 17:45:51] [INFO ] After 20ms SMT Verify possible using 16 Read/Feed constraints in real domain returned unsat :0 sat :0 real:19
[2022-05-16 17:45:51] [INFO ] After 395ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:19
[2022-05-16 17:45:51] [INFO ] [Nat]Absence check using 10 positive place invariants in 7 ms returned sat
[2022-05-16 17:45:51] [INFO ] [Nat]Absence check using 10 positive and 8 generalized place invariants in 5 ms returned sat
[2022-05-16 17:45:51] [INFO ] After 179ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :19
[2022-05-16 17:45:52] [INFO ] After 184ms SMT Verify possible using 16 Read/Feed constraints in natural domain returned unsat :0 sat :19
[2022-05-16 17:45:52] [INFO ] After 450ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :19
Attempting to minimize the solution found.
Minimization took 165 ms.
[2022-05-16 17:45:52] [INFO ] After 982ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :19
Fused 19 Parikh solutions to 11 different solutions.
Parikh walk visited 0 properties in 4 ms.
Support contains 32 out of 48 places. Attempting structural reductions.
Starting structural reductions in SAFETY mode, iteration 0 : 48/48 places, 112/112 transitions.
Drop transitions removed 17 transitions
Reduce isomorphic transitions removed 17 transitions.
Iterating post reduction 0 with 17 rules applied. Total rules applied 17 place count 48 transition count 95
Drop transitions removed 1 transitions
Redundant transition composition rules discarded 1 transitions
Iterating global reduction 1 with 1 rules applied. Total rules applied 18 place count 48 transition count 94
Free-agglomeration rule applied 1 times.
Iterating global reduction 1 with 1 rules applied. Total rules applied 19 place count 48 transition count 93
Reduce places removed 1 places and 0 transitions.
Iterating post reduction 1 with 1 rules applied. Total rules applied 20 place count 47 transition count 93
Applied a total of 20 rules in 25 ms. Remains 47 /48 variables (removed 1) and now considering 93/112 (removed 19) transitions.
Finished structural reductions, in 1 iterations. Remains : 47/48 places, 93/112 transitions.
Incomplete random walk after 1000000 steps, including 136143 resets, run finished after 27082 ms. (steps per millisecond=36 ) properties (out of 19) seen :13
Incomplete Best-First random walk after 1000000 steps, including 20737 resets, run finished after 3759 ms. (steps per millisecond=266 ) properties (out of 6) seen :1
Incomplete Best-First random walk after 1000001 steps, including 24708 resets, run finished after 4728 ms. (steps per millisecond=211 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 1000001 steps, including 20650 resets, run finished after 3811 ms. (steps per millisecond=262 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 1000001 steps, including 20635 resets, run finished after 3543 ms. (steps per millisecond=282 ) properties (out of 5) seen :2
Running SMT prover for 3 properties.
[2022-05-16 17:46:35] [INFO ] Flow matrix only has 81 transitions (discarded 12 similar events)
// Phase 1: matrix 81 rows 47 cols
[2022-05-16 17:46:35] [INFO ] Computed 18 place invariants in 1 ms
[2022-05-16 17:46:35] [INFO ] [Real]Absence check using 10 positive place invariants in 6 ms returned sat
[2022-05-16 17:46:35] [INFO ] [Real]Absence check using 10 positive and 8 generalized place invariants in 5 ms returned sat
[2022-05-16 17:46:35] [INFO ] After 54ms SMT Verify possible using state equation in real domain returned unsat :0 sat :1 real:2
[2022-05-16 17:46:35] [INFO ] State equation strengthened by 15 read => feed constraints.
[2022-05-16 17:46:35] [INFO ] After 8ms SMT Verify possible using 15 Read/Feed constraints in real domain returned unsat :0 sat :0 real:3
[2022-05-16 17:46:35] [INFO ] After 121ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:3
[2022-05-16 17:46:35] [INFO ] [Nat]Absence check using 10 positive place invariants in 5 ms returned sat
[2022-05-16 17:46:35] [INFO ] [Nat]Absence check using 10 positive and 8 generalized place invariants in 3 ms returned sat
[2022-05-16 17:46:35] [INFO ] After 52ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :3
[2022-05-16 17:46:35] [INFO ] After 20ms SMT Verify possible using 15 Read/Feed constraints in natural domain returned unsat :0 sat :3
[2022-05-16 17:46:35] [INFO ] After 44ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :3
Attempting to minimize the solution found.
Minimization took 19 ms.
[2022-05-16 17:46:35] [INFO ] After 161ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :3
Fused 3 Parikh solutions to 2 different solutions.
Parikh walk visited 0 properties in 0 ms.
Support contains 12 out of 47 places. Attempting structural reductions.
Starting structural reductions in SAFETY mode, iteration 0 : 47/47 places, 93/93 transitions.
Graph (complete) has 258 edges and 47 vertex of which 38 are kept as prefixes of interest. Removing 9 places using SCC suffix rule.7 ms
Discarding 9 places :
Also discarding 0 output transitions
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 2 place count 37 transition count 92
Iterating global reduction 0 with 1 rules applied. Total rules applied 3 place count 37 transition count 92
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 4 place count 37 transition count 91
Free-agglomeration rule applied 2 times.
Iterating global reduction 1 with 2 rules applied. Total rules applied 6 place count 37 transition count 89
Reduce places removed 2 places and 0 transitions.
Iterating post reduction 1 with 2 rules applied. Total rules applied 8 place count 35 transition count 89
Drop transitions removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 2 with 2 rules applied. Total rules applied 10 place count 35 transition count 87
Partial Free-agglomeration rule applied 8 times.
Drop transitions removed 8 transitions
Iterating global reduction 2 with 8 rules applied. Total rules applied 18 place count 35 transition count 87
Applied a total of 18 rules in 26 ms. Remains 35 /47 variables (removed 12) and now considering 87/93 (removed 6) transitions.
Finished structural reductions, in 1 iterations. Remains : 35/47 places, 87/93 transitions.
Incomplete random walk after 1000000 steps, including 129870 resets, run finished after 16332 ms. (steps per millisecond=61 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 1000001 steps, including 19512 resets, run finished after 2528 ms. (steps per millisecond=395 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 1000001 steps, including 28571 resets, run finished after 3363 ms. (steps per millisecond=297 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 1000001 steps, including 19595 resets, run finished after 2495 ms. (steps per millisecond=400 ) properties (out of 3) seen :0
Finished probabilistic random walk after 1932 steps, run visited all 3 properties in 48 ms. (steps per millisecond=40 )
Probabilistic random walk after 1932 steps, saw 676 distinct states, run finished after 49 ms. (steps per millisecond=39 ) properties seen :3
Able to resolve query QuasiLiveness after proving 35 properties.
FORMULA QuasiLiveness TRUE TECHNIQUES RANDOM_WALK PROBABILISTIC_WALK BESTFIRST_WALK TOPOLOGICAL INITIAL_STATE
Total runtime 71710 ms.

BK_STOP 1652723220717

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

+ export LANG=C
+ LANG=C
+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ QuasiLiveness = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution QuasiLiveness -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 1800
+ ulimit -s 65536
+ export PYTHONPATH=/usr/lib/python3.9/site-packages/
+ PYTHONPATH=/usr/lib/python3.9/site-packages/
+ export LD_LIBRARY_PATH=/usr/local/lib:
+ LD_LIBRARY_PATH=/usr/local/lib:
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202205111006.jar
+ VERSION=202205111006
+ echo 'Running Version 202205111006'
+ /home/mcc/BenchKit/bin//..//itstools/its-tools -data @none -pnfolder /home/mcc/execution -examination QuasiLiveness -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=@none -Xss128m -Xms40m -Xmx8192m

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="HealthRecord-PT-12"
export BK_EXAMINATION="QuasiLiveness"
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 HealthRecord-PT-12, examination is QuasiLiveness"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r121-smll-165264480700102"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/HealthRecord-PT-12.tgz
mv HealthRecord-PT-12 execution
cd execution
if [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "UpperBounds" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] || [ "QuasiLiveness" = "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 [ "QuasiLiveness" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "QuasiLiveness" != "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 "QuasiLiveness.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property QuasiLiveness.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "QuasiLiveness.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 '' QuasiLiveness.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "QuasiLiveness" = "ReachabilityDeadlock" ] || [ "QuasiLiveness" = "QuasiLiveness" ] || [ "QuasiLiveness" = "StableMarking" ] || [ "QuasiLiveness" = "Liveness" ] || [ "QuasiLiveness" = "OneSafe" ] ; then
echo "FORMULA_NAME QuasiLiveness"
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 ;