About the Execution of ITS-Tools for BART-PT-002
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
279.520 | 6345.00 | 14301.00 | 186.20 | TFTFTFTFTTFTFFFF | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2021-input.r007-tall-162037990200595.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/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 BART-PT-002, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r007-tall-162037990200595
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 3.6M
-rw-r--r-- 1 mcc users 375K Jun 13 08:42 CTLCardinality.txt
-rw-r--r-- 1 mcc users 1.4M Jun 13 08:42 CTLCardinality.xml
-rw-r--r-- 1 mcc users 291K Jun 13 08:42 CTLFireability.txt
-rw-r--r-- 1 mcc users 979K Jun 13 08:42 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Mar 20 13:27 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.1K Mar 20 13:27 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.1K Jun 8 09:43 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Jun 8 09:43 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.9K Jun 8 09:43 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Jun 8 09:43 LTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Jun 8 09:14 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 17K Jun 8 09:14 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.7K Jun 8 09:13 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 16K Jun 8 09:13 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Jun 8 09:15 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Jun 8 09:15 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Mar 20 13:27 equiv_col
-rw-r--r-- 1 mcc users 4 Mar 20 13:27 instance
-rw-r--r-- 1 mcc users 6 Mar 20 13:27 iscolored
-rw-r--r-- 1 mcc users 534K Mar 20 13:27 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 BART-PT-002-CTLCardinality-00
FORMULA_NAME BART-PT-002-CTLCardinality-01
FORMULA_NAME BART-PT-002-CTLCardinality-02
FORMULA_NAME BART-PT-002-CTLCardinality-03
FORMULA_NAME BART-PT-002-CTLCardinality-04
FORMULA_NAME BART-PT-002-CTLCardinality-05
FORMULA_NAME BART-PT-002-CTLCardinality-06
FORMULA_NAME BART-PT-002-CTLCardinality-07
FORMULA_NAME BART-PT-002-CTLCardinality-08
FORMULA_NAME BART-PT-002-CTLCardinality-09
FORMULA_NAME BART-PT-002-CTLCardinality-10
FORMULA_NAME BART-PT-002-CTLCardinality-11
FORMULA_NAME BART-PT-002-CTLCardinality-12
FORMULA_NAME BART-PT-002-CTLCardinality-13
FORMULA_NAME BART-PT-002-CTLCardinality-14
FORMULA_NAME BART-PT-002-CTLCardinality-15
=== Now, execution of the tool begins
BK_START 1623578702250
Running Version 0
[2021-06-13 10:05:03] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLCardinality, -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]
[2021-06-13 10:05:03] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2021-06-13 10:05:03] [INFO ] Load time of PNML (sax parser for PT used): 98 ms
[2021-06-13 10:05:04] [INFO ] Transformed 474 places.
[2021-06-13 10:05:04] [INFO ] Transformed 404 transitions.
[2021-06-13 10:05:04] [INFO ] Found NUPN structural information;
[2021-06-13 10:05:04] [INFO ] Parsed PT model containing 474 places and 404 transitions in 152 ms.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 70 ms.
Reduce places removed 210 places and 0 transitions.
FORMULA BART-PT-002-CTLCardinality-03 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 160 out of 264 places. Attempting structural reductions.
Starting structural reductions, iteration 0 : 264/264 places, 404/404 transitions.
Discarding 8 places :
Symmetric choice reduction at 0 with 8 rule applications. Total rules 8 place count 256 transition count 396
Iterating global reduction 0 with 8 rules applied. Total rules applied 16 place count 256 transition count 396
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 17 place count 255 transition count 395
Iterating global reduction 0 with 1 rules applied. Total rules applied 18 place count 255 transition count 395
Applied a total of 18 rules in 34 ms. Remains 255 /264 variables (removed 9) and now considering 395/404 (removed 9) transitions.
// Phase 1: matrix 395 rows 255 cols
[2021-06-13 10:05:04] [INFO ] Computed 2 place invariants in 28 ms
[2021-06-13 10:05:04] [INFO ] Implicit Places using invariants in 179 ms returned []
// Phase 1: matrix 395 rows 255 cols
[2021-06-13 10:05:04] [INFO ] Computed 2 place invariants in 13 ms
[2021-06-13 10:05:04] [INFO ] Implicit Places using invariants and state equation in 165 ms returned []
Implicit Place search using SMT with State Equation took 376 ms to find 0 implicit places.
// Phase 1: matrix 395 rows 255 cols
[2021-06-13 10:05:04] [INFO ] Computed 2 place invariants in 3 ms
[2021-06-13 10:05:04] [INFO ] Dead Transitions using invariants and state equation in 223 ms returned []
Finished structural reductions, in 1 iterations. Remains : 255/264 places, 395/404 transitions.
[2021-06-13 10:05:04] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
[2021-06-13 10:05:04] [INFO ] Flatten gal took : 55 ms
[2021-06-13 10:05:05] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
FORMULA BART-PT-002-CTLCardinality-07 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-PT-002-CTLCardinality-00 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2021-06-13 10:05:05] [INFO ] Flatten gal took : 21 ms
[2021-06-13 10:05:05] [INFO ] Input system was already deterministic with 395 transitions.
FORMULA BART-PT-002-CTLCardinality-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 100000 steps, including 2 resets, run finished after 664 ms. (steps per millisecond=150 ) properties (out of 42) seen :6
Running SMT prover for 36 properties.
// Phase 1: matrix 395 rows 255 cols
[2021-06-13 10:05:05] [INFO ] Computed 2 place invariants in 6 ms
[2021-06-13 10:05:06] [INFO ] [Real]Absence check using 2 positive place invariants in 3 ms returned sat
[2021-06-13 10:05:06] [INFO ] SMT Verify possible in real domain returnedunsat :19 sat :0 real:17
[2021-06-13 10:05:06] [INFO ] [Nat]Absence check using 2 positive place invariants in 3 ms returned sat
[2021-06-13 10:05:06] [INFO ] SMT Verify possible in nat domain returned unsat :17 sat :19
Successfully simplified 36 atomic propositions for a total of 8 simplifications.
[2021-06-13 10:05:06] [INFO ] Initial state test concluded for 2 properties.
FORMULA BART-PT-002-CTLCardinality-09 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BART-PT-002-CTLCardinality-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Graph (trivial) has 395 edges and 255 vertex of which 255 / 255 are part of one of the 2 SCC in 4 ms
Free SCC test removed 253 places
Ensure Unique test removed 393 transitions
Reduce isomorphic transitions removed 393 transitions.
Reduce places removed 2 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 2 place count 0 transition count 1
Applied a total of 2 rules in 8 ms. Remains 0 /255 variables (removed 255) and now considering 1/395 (removed 394) transitions.
[2021-06-13 10:05:06] [INFO ] Removed 1 GAL types that were empty due to variable simplifications.
petri,
[2021-06-13 10:05:06] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
[2021-06-13 10:05:06] [INFO ] Flatten gal took : 1 ms
FORMULA BART-PT-002-CTLCardinality-10 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2021-06-13 10:05:06] [INFO ] Flatten gal took : 0 ms
[2021-06-13 10:05:06] [INFO ] Input system was already deterministic with 1 transitions.
[2021-06-13 10:05:06] [INFO ] Flatten gal took : 16 ms
[2021-06-13 10:05:06] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
FORMULA BART-PT-002-CTLCardinality-13 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2021-06-13 10:05:06] [INFO ] Flatten gal took : 16 ms
[2021-06-13 10:05:06] [INFO ] Applying decomposition
[2021-06-13 10:05:06] [INFO ] Flatten gal took : 16 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/graph4169689850104974779.txt, -o, /tmp/graph4169689850104974779.bin, -w, /tmp/graph4169689850104974779.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/graph4169689850104974779.bin, -l, -1, -v, -w, /tmp/graph4169689850104974779.weights, -q, 0, -e, 0.001], workingDir=null]
[2021-06-13 10:05:06] [INFO ] Decomposing Gal with order
[2021-06-13 10:05:06] [INFO ] Rewriting arrays to variables to allow decomposition.
[2021-06-13 10:05:06] [INFO ] Removed a total of 162 redundant transitions.
[2021-06-13 10:05:06] [INFO ] Flatten gal took : 60 ms
[2021-06-13 10:05:06] [INFO ] Fuse similar labels procedure discarded/fused a total of 126 labels/synchronizations in 22 ms.
[2021-06-13 10:05:06] [INFO ] Time to serialize gal into /tmp/CTLCardinality14580018990192737019.gal : 8 ms
[2021-06-13 10:05:06] [INFO ] Time to serialize properties into /tmp/CTLCardinality3838187988211438903.ctl : 1 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/CTLCardinality14580018990192737019.gal, -t, CGAL, -ctl, /tmp/CTLCardinality3838187988211438903.ctl, --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/CTLCardinality14580018990192737019.gal -t CGAL -ctl /tmp/CTLCardinality3838187988211438903.ctl --gen-order FOLLOW
No direction supplied, using forward translation only.
Parsed 8 CTL formulae.
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
reachable,16254,0.242225,11080,2,1012,5,29946,6,0,1392,28675,0
Converting to forward existential form...Done !
original formula: AX(FALSE)
=> equivalent forward existential formula: [(EY(Init) * !(FALSE))] = FALSE
(forward)formula 0,0,0.272862,11080,1,0,6,29946,7,1,1737,28675,1
FORMULA BART-PT-002-CTLCardinality-01 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !
***************************************
original formula: EF(!(AX(FALSE)))
=> equivalent forward existential formula: [(EY(FwdU(Init,TRUE)) * !(FALSE))] != FALSE
(forward)formula 1,1,0.297616,11080,1,0,6,29946,7,1,2171,28675,2
FORMULA BART-PT-002-CTLCardinality-02 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: AF(EX(AX(FALSE)))
=> equivalent forward existential formula: [FwdG(Init,!(EX(!(EX(!(FALSE))))))] = FALSE
Reverse transition relation is exact ! Faster fixpoint algorithm enabled.
(forward)formula 2,0,0.813011,27036,1,0,6,113547,13,2,6020,42548,9
FORMULA BART-PT-002-CTLCardinality-05 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !
***************************************
original formula: EX(TRUE)
=> equivalent forward existential formula: [(EY(Init) * TRUE)] != FALSE
(forward)formula 3,1,0.813163,27036,1,0,6,113547,13,2,6020,42548,9
FORMULA BART-PT-002-CTLCardinality-06 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: EX(EF((((((((((gu53.TrainState_1_2_34+1)+1)+1)+gu53.TrainState_2_3_21)+gu53.TrainState_2_3_24)+gu53.TrainState_2_3_8)+gu53.TrainState_2_1_15)<=(((gu53.TrainState_2_1_20+1)+gu53.TrainState_1_2_7)+gu53.TrainState_1_2_33)) * EX(TRUE))))
=> equivalent forward existential formula: [(EY((FwdU(EY(Init),TRUE) * ((((((((gu53.TrainState_1_2_34+1)+1)+1)+gu53.TrainState_2_3_21)+gu53.TrainState_2_3_24)+gu53.TrainState_2_3_8)+gu53.TrainState_2_1_15)<=(((gu53.TrainState_2_1_20+1)+gu53.TrainState_1_2_7)+gu53.TrainState_1_2_33)))) * TRUE)] != FALSE
(forward)formula 4,1,0.851875,28356,1,0,8,119321,14,4,6064,51279,13
FORMULA BART-PT-002-CTLCardinality-08 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: EG((AX(FALSE) + EX(TRUE)))
=> equivalent forward existential formula: [FwdG(Init,(!(EX(!(FALSE))) + EX(TRUE)))] != FALSE
(forward)formula 5,1,0.852202,28356,1,0,8,119321,14,4,6064,51279,13
FORMULA BART-PT-002-CTLCardinality-11 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: AX(FALSE)
=> equivalent forward existential formula: [(EY(Init) * !(FALSE))] = FALSE
(forward)formula 6,0,0.852317,28356,1,0,8,119321,14,4,6064,51279,13
FORMULA BART-PT-002-CTLCardinality-12 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !
***************************************
original formula: EF(AG((((((2+gu15.TrainState_1_4_28)+gu15.TrainState_2_4_14)+gu15.TrainState_2_1_23)<=(((((((gu15.TrainState_1_4_22+1)+gu15.TrainState_1_4_29)+1)+gu15.TrainState_2_0_0)+1)+gu15.TrainState_1_3_11)+gu15.TrainState_2_2_10))||(((((6+gi3.gi1.gi2.gu56.TrainState_2_1_31)+1)+gi3.gi1.gi2.gu56.TrainState_2_4_22)+1)>=46))))
=> equivalent forward existential formula: [(FwdU(Init,TRUE) * !(E(TRUE U !((((((2+gu15.TrainState_1_4_28)+gu15.TrainState_2_4_14)+gu15.TrainState_2_1_23)<=(((((((gu15.TrainState_1_4_22+1)+gu15.TrainState_1_4_29)+1)+gu15.TrainState_2_0_0)+1)+gu15.TrainState_1_3_11)+gu15.TrainState_2_2_10))||(((((6+gi3.gi1.gi2.gu56.TrainState_2_1_31)+1)+gi3.gi1.gi2.gu56.TrainState_2_4_22)+1)>=46))))))] != FALSE
(forward)formula 7,0,0.936182,30204,1,0,9,129768,20,4,6589,55135,16
FORMULA BART-PT-002-CTLCardinality-15 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !
***************************************
BK_STOP 1623578708595
--------------------
content from stderr:
+ export BINDIR=/home/mcc/BenchKit/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ CTLCardinality = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution CTLCardinality -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 CTLCardinality -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="BART-PT-002"
export BK_EXAMINATION="CTLCardinality"
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 BART-PT-002, examination is CTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r007-tall-162037990200595"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/BART-PT-002.tgz
mv BART-PT-002 execution
cd execution
if [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "UpperBounds" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] || [ "CTLCardinality" = "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 [ "CTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLCardinality" != "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 "CTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLCardinality.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 '
echo "FORMULA_NAME $x"
done
elif [ "CTLCardinality" = "ReachabilityDeadlock" ] || [ "CTLCardinality" = "QuasiLiveness" ] || [ "CTLCardinality" = "StableMarking" ] || [ "CTLCardinality" = "Liveness" ] || [ "CTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLCardinality"
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 ;