Execution Chart

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

Trace from the execution

Formatting '/data/fko/mcc2021-input.r159-oct2-162089267800103.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fko/mcc2021-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
........................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is PolyORBLF-COL-S02J06T06, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r159-oct2-162089267800103
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 544K
-rw-r--r-- 1 mcc users 17K May 5 16:58 CTLCardinality.txt
-rw-r--r-- 1 mcc users 111K May 10 09:43 CTLCardinality.xml
-rw-r--r-- 1 mcc users 14K May 5 16:58 CTLFireability.txt
-rw-r--r-- 1 mcc users 99K May 10 09:43 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 6 14:48 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.3K May 6 14:48 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.3K Mar 28 16:27 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Mar 28 16:27 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K Mar 28 16:27 LTLFireability.txt
-rw-r--r-- 1 mcc users 16K Mar 28 16:27 LTLFireability.xml
-rw-r--r-- 1 mcc users 4.5K Mar 27 09:20 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 20K Mar 27 09:20 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 2.8K Mar 25 11:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 15K Mar 25 11:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Mar 22 09:16 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Mar 22 09:16 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 5 16:51 equiv_pt
-rw-r--r-- 1 mcc users 10 May 5 16:51 instance
-rw-r--r-- 1 mcc users 5 May 5 16:51 iscolored
-rw-r--r-- 1 mcc users 154K 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

here is the order used to build the result vector(from text file)
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-00
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-01
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-02
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-03
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-04
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-05
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-06
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-07
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-08
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-09
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-10
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-11
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-12
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-13
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-14
FORMULA_NAME PolyORBLF-COL-S02J06T06-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1621183823842

Running Version 0
[2021-05-16 16:50:27] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -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, 3600]
[2021-05-16 16:50:27] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2021-05-16 16:50:28] [INFO ] Detected file is not PT type :http://www.pnml.org/version-2009/grammar/symmetricnet
log4j:WARN No appenders could be found for logger (org.apache.axiom.locator.DefaultOMMetaFactoryLocator).
log4j:WARN Please initialize the log4j system properly.
[2021-05-16 16:50:28] [WARNING] Using fallBack plugin, rng conformance not checked
[2021-05-16 16:50:29] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 1019 ms
[2021-05-16 16:50:29] [INFO ] ms1 symmetric to ms2 in transition T_1124
[2021-05-16 16:50:29] [INFO ] ms1 symmetric to ms3 in transition T_1125
[2021-05-16 16:50:29] [INFO ] ms3 symmetric to ms2 in transition T_1125
[2021-05-16 16:50:29] [INFO ] ms1 symmetric to ms3 in transition T_1126
[2021-05-16 16:50:29] [INFO ] ms3 symmetric to ms2 in transition T_1126
[2021-05-16 16:50:29] [INFO ] ms2 symmetric to ms4 in transition T_1126
[2021-05-16 16:50:29] [INFO ] Imported 81 HL places and 65 HL transitions for a total of 536 PT places and 1096.0 transition bindings in 229 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 6 ms.
Working with output stream class java.io.PrintStream
[2021-05-16 16:50:29] [INFO ] Built PT skeleton of HLPN with 81 places and 65 transitions in 4 ms.
[2021-05-16 16:50:29] [INFO ] Skeletonized HLPN properties in 0 ms.
Successfully produced net in file /tmp/petri1000_18274194677465478828.dot
Finished random walk after 0 steps, including 0 resets, run visited all 0 properties in 1 ms. (steps per millisecond=0 )
[2021-05-16 16:50:29] [INFO ] Flatten gal took : 44 ms
[2021-05-16 16:50:29] [INFO ] Flatten gal took : 9 ms
[2021-05-16 16:50:29] [INFO ] Unfolded HLPN to a Petri net with 536 places and 968 transitions in 42 ms.
[2021-05-16 16:50:29] [INFO ] Unfolded HLPN properties in 1 ms.
Successfully produced net in file /tmp/petri1001_9956807133730231728.dot
Incomplete random walk after 10000 steps, including 4 resets, run finished after 631 ms. (steps per millisecond=15 ) properties (out of 16) seen :10
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-14 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-12 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-10 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-07 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-00 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 135 ms. (steps per millisecond=74 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 127 ms. (steps per millisecond=78 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 74 ms. (steps per millisecond=135 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10000 steps, including 2 resets, run finished after 97 ms. (steps per millisecond=103 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10001 steps, including 2 resets, run finished after 73 ms. (steps per millisecond=137 ) properties (out of 6) seen :0
Incomplete Best-First random walk after 10000 steps, including 3 resets, run finished after 240 ms. (steps per millisecond=41 ) properties (out of 6) seen :0
Running SMT prover for 6 properties.
[2021-05-16 16:50:31] [INFO ] Flow matrix only has 956 transitions (discarded 12 similar events)
// Phase 1: matrix 956 rows 536 cols
[2021-05-16 16:50:31] [INFO ] Computed 50 place invariants in 104 ms
[2021-05-16 16:50:31] [INFO ] [Real]Absence check using 17 positive place invariants in 20 ms returned sat
[2021-05-16 16:50:31] [INFO ] [Real]Absence check using 17 positive and 33 generalized place invariants in 3 ms returned unsat
[2021-05-16 16:50:31] [INFO ] [Real]Absence check using 17 positive place invariants in 16 ms returned sat
[2021-05-16 16:50:31] [INFO ] [Real]Absence check using 17 positive and 33 generalized place invariants in 68 ms returned unsat
[2021-05-16 16:50:32] [INFO ] [Real]Absence check using 17 positive place invariants in 23 ms returned sat
[2021-05-16 16:50:32] [INFO ] [Real]Absence check using 17 positive and 33 generalized place invariants in 35 ms returned sat
[2021-05-16 16:50:32] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-16 16:50:33] [INFO ] [Real]Absence check using state equation in 1759 ms returned sat
[2021-05-16 16:50:34] [INFO ] Solution in real domain found non-integer solution.
[2021-05-16 16:50:34] [INFO ] [Nat]Absence check using 17 positive place invariants in 64 ms returned sat
[2021-05-16 16:50:34] [INFO ] [Nat]Absence check using 17 positive and 33 generalized place invariants in 83 ms returned sat
[2021-05-16 16:50:34] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-16 16:50:35] [INFO ] [Nat]Absence check using state equation in 842 ms returned sat
[2021-05-16 16:50:35] [INFO ] State equation strengthened by 78 read => feed constraints.
[2021-05-16 16:50:36] [INFO ] [Nat]Added 78 Read/Feed constraints in 902 ms returned sat
[2021-05-16 16:50:36] [INFO ] Deduced a trap composed of 73 places in 777 ms of which 40 ms to minimize.
[2021-05-16 16:50:38] [INFO ] Deduced a trap composed of 73 places in 415 ms of which 2 ms to minimize.
[2021-05-16 16:50:38] [INFO ] Deduced a trap composed of 272 places in 640 ms of which 1 ms to minimize.
[2021-05-16 16:50:39] [INFO ] Deduced a trap composed of 3 places in 493 ms of which 2 ms to minimize.
[2021-05-16 16:50:39] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream close... while checking expression at index 2
[2021-05-16 16:50:39] [INFO ] [Real]Absence check using 17 positive place invariants in 48 ms returned sat
[2021-05-16 16:50:39] [INFO ] [Real]Absence check using 17 positive and 33 generalized place invariants in 128 ms returned unsat
[2021-05-16 16:50:39] [INFO ] [Real]Absence check using 17 positive place invariants in 29 ms returned sat
[2021-05-16 16:50:39] [INFO ] [Real]Absence check using 17 positive and 33 generalized place invariants in 1 ms returned unsat
[2021-05-16 16:50:40] [INFO ] [Real]Absence check using 17 positive place invariants in 38 ms returned sat
[2021-05-16 16:50:40] [INFO ] [Real]Absence check using 17 positive and 33 generalized place invariants in 22 ms returned unsat
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-15 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-13 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-11 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-06 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-04 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 6 Parikh solutions to 1 different solutions.
Support contains 62 out of 536 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 536/536 places, 968/968 transitions.
Ensure Unique test removed 2 places
Drop transitions removed 42 transitions
Trivial Post-agglo rules discarded 42 transitions
Performed 42 trivial Post agglomeration. Transition count delta: 42
Iterating post reduction 0 with 44 rules applied. Total rules applied 44 place count 534 transition count 926
Reduce places removed 42 places and 0 transitions.
Performed 6 Post agglomeration using F-continuation condition.Transition count delta: 6
Iterating post reduction 1 with 48 rules applied. Total rules applied 92 place count 492 transition count 920
Reduce places removed 6 places and 0 transitions.
Iterating post reduction 2 with 6 rules applied. Total rules applied 98 place count 486 transition count 920
Performed 18 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 18 Pre rules applied. Total rules applied 98 place count 486 transition count 902
Deduced a syphon composed of 18 places in 21 ms
Reduce places removed 18 places and 0 transitions.
Iterating global reduction 3 with 36 rules applied. Total rules applied 134 place count 468 transition count 902
Performed 36 Post agglomeration using F-continuation condition.Transition count delta: 36
Deduced a syphon composed of 36 places in 1 ms
Reduce places removed 36 places and 0 transitions.
Iterating global reduction 3 with 72 rules applied. Total rules applied 206 place count 432 transition count 866
Free-agglomeration rule (complex) applied 6 times.
Iterating global reduction 3 with 6 rules applied. Total rules applied 212 place count 432 transition count 860
Reduce places removed 6 places and 0 transitions.
Iterating post reduction 3 with 6 rules applied. Total rules applied 218 place count 426 transition count 860
Applied a total of 218 rules in 320 ms. Remains 426 /536 variables (removed 110) and now considering 860/968 (removed 108) transitions.
[2021-05-16 16:50:40] [INFO ] Flow matrix only has 848 transitions (discarded 12 similar events)
// Phase 1: matrix 848 rows 426 cols
[2021-05-16 16:50:40] [INFO ] Computed 48 place invariants in 64 ms
[2021-05-16 16:50:41] [INFO ] Dead Transitions using invariants and state equation in 985 ms returned [778, 780, 781, 782, 783, 784, 785, 786, 787, 788, 789, 792, 794, 795, 796, 797, 798, 799, 800, 801, 802, 803, 806, 808, 809, 810, 811, 812, 813, 814, 815, 816, 817, 820, 822, 823, 824, 825, 826, 827, 828, 829, 830, 831, 834, 836, 837, 838, 839, 840, 841, 842, 843, 844, 845, 848, 850, 851, 852, 853, 854, 855, 856, 857, 858, 859]
Found 66 dead transitions using SMT.
Drop transitions removed 66 transitions
Dead transitions reduction (with SMT) triggered by suspicious arc values removed 66 transitions :[859, 858, 857, 856, 855, 854, 853, 852, 851, 850, 848, 845, 844, 843, 842, 841, 840, 839, 838, 837, 836, 834, 831, 830, 829, 828, 827, 826, 825, 824, 823, 822, 820, 817, 816, 815, 814, 813, 812, 811, 810, 809, 808, 806, 803, 802, 801, 800, 799, 798, 797, 796, 795, 794, 792, 789, 788, 787, 786, 785, 784, 783, 782, 781, 780, 778]
Starting structural reductions, iteration 1 : 426/536 places, 794/968 transitions.
Reduce places removed 1 places and 12 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 1 place count 425 transition count 782
Reduce places removed 12 places and 12 transitions.
Iterating post reduction 1 with 12 rules applied. Total rules applied 13 place count 413 transition count 770
Deduced a syphon composed of 1 places in 1 ms
Applied a total of 13 rules in 53 ms. Remains 413 /426 variables (removed 13) and now considering 770/794 (removed 24) transitions.
Finished structural reductions, in 2 iterations. Remains : 413/536 places, 770/968 transitions.
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 1 places and 0 transitions.
FORMULA PolyORBLF-COL-S02J06T06-ReachabilityFireability-08 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
All properties solved without resorting to model-checking.

BK_STOP 1621183842152

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

+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ ReachabilityFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution ReachabilityFireability -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ 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 ReachabilityFireability -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 3600 -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="PolyORBLF-COL-S02J06T06"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="itstools"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
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 PolyORBLF-COL-S02J06T06, examination is ReachabilityFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r159-oct2-162089267800103"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/PolyORBLF-COL-S02J06T06.tgz
mv PolyORBLF-COL-S02J06T06 execution
cd execution
if [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "UpperBounds" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] || [ "ReachabilityFireability" = "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 [ "ReachabilityFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityFireability" != "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 "ReachabilityFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityFireability.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 '' ReachabilityFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityFireability"
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 ;