About the Execution of ITS-Tools for NQueens-PT-05
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
15742.980 | 5875.00 | 13162.00 | 100.10 | TTFFTFFTTFFTTFTT | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/local/x2003239/mcc2020-input.r111-csrt-158961257200115.qcow2', fmt=qcow2 size=4294967296 backing_file=/local/x2003239/mcc2020-input.qcow2 encryption=off 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 NQueens-PT-05, examination is CTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r111-csrt-158961257200115
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 200K
-rw-r--r-- 1 mcc users 3.3K Apr 8 13:10 CTLCardinality.txt
-rw-r--r-- 1 mcc users 19K Apr 8 13:10 CTLCardinality.xml
-rw-r--r-- 1 mcc users 3.0K Apr 7 16:38 CTLFireability.txt
-rw-r--r-- 1 mcc users 19K Apr 7 16:38 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Mar 24 05:37 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.1K Mar 24 05:37 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.4K Apr 14 12:43 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Apr 28 14:01 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.0K Apr 14 12:43 LTLFireability.txt
-rw-r--r-- 1 mcc users 15K Apr 28 14:01 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.5K Apr 6 19:22 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 18K Apr 6 19:22 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 2.9K Apr 6 02:49 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 16K Apr 6 02:49 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Apr 6 20:24 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Apr 6 20:24 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 24 05:37 equiv_col
-rw-r--r-- 1 mcc users 3 Mar 24 05:37 instance
-rw-r--r-- 1 mcc users 6 Mar 24 05:37 iscolored
-rw-r--r-- 1 mcc users 27K 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
here is the order used to build the result vector(from text file)
FORMULA_NAME NQueens-PT-05-CTLCardinality-00
FORMULA_NAME NQueens-PT-05-CTLCardinality-01
FORMULA_NAME NQueens-PT-05-CTLCardinality-02
FORMULA_NAME NQueens-PT-05-CTLCardinality-03
FORMULA_NAME NQueens-PT-05-CTLCardinality-04
FORMULA_NAME NQueens-PT-05-CTLCardinality-05
FORMULA_NAME NQueens-PT-05-CTLCardinality-06
FORMULA_NAME NQueens-PT-05-CTLCardinality-07
FORMULA_NAME NQueens-PT-05-CTLCardinality-08
FORMULA_NAME NQueens-PT-05-CTLCardinality-09
FORMULA_NAME NQueens-PT-05-CTLCardinality-10
FORMULA_NAME NQueens-PT-05-CTLCardinality-11
FORMULA_NAME NQueens-PT-05-CTLCardinality-12
FORMULA_NAME NQueens-PT-05-CTLCardinality-13
FORMULA_NAME NQueens-PT-05-CTLCardinality-14
FORMULA_NAME NQueens-PT-05-CTLCardinality-15
=== Now, execution of the tool begins
BK_START 1589827782790
[2020-05-18 18:49:45] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLCardinality, -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, 3600]
[2020-05-18 18:49:45] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2020-05-18 18:49:45] [INFO ] Load time of PNML (sax parser for PT used): 134 ms
[2020-05-18 18:49:45] [INFO ] Transformed 55 places.
[2020-05-18 18:49:45] [INFO ] Transformed 25 transitions.
[2020-05-18 18:49:45] [INFO ] Parsed PT model containing 55 places and 25 transitions in 200 ms.
Reduce places removed 2 places and 0 transitions.
Parsed 16 properties from file /home/mcc/execution/CTLCardinality.xml in 27 ms.
Incomplete random walk after 100000 steps, including 18744 resets, run finished after 436 ms. (steps per millisecond=229 ) properties seen :[0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0]
// Phase 1: matrix 25 rows 53 cols
[2020-05-18 18:49:46] [INFO ] Computed 28 place invariants in 8 ms
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 34 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 8 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 43 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 10 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 9 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 34 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 55 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 17 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 10 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 6 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 11 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 4 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 13 ms returned sat
[2020-05-18 18:49:46] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using state equation in 34 ms returned sat
[2020-05-18 18:49:46] [INFO ] Solution in real domain found non-integer solution.
[2020-05-18 18:49:46] [INFO ] [Nat]Absence check using 28 positive place invariants in 95 ms returned unsat
[2020-05-18 18:49:46] [INFO ] [Real]Absence check using 28 positive place invariants in 13 ms returned unsat
Successfully simplified 14 atomic propositions for a total of 14 simplifications.
[2020-05-18 18:49:47] [INFO ] Initial state reduction rules for CTL removed 4 formulas.
[2020-05-18 18:49:47] [INFO ] Flatten gal took : 38 ms
[2020-05-18 18:49:47] [INFO ] Initial state reduction rules for CTL removed 4 formulas.
[2020-05-18 18:49:47] [INFO ] Flatten gal took : 10 ms
FORMULA NQueens-PT-05-CTLCardinality-13 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-05-CTLCardinality-10 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-05-CTLCardinality-03 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-05-CTLCardinality-02 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2020-05-18 18:49:47] [INFO ] Applying decomposition
[2020-05-18 18:49:47] [INFO ] Flatten gal took : 8 ms
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/graph13889365500702849496.txt, -o, /tmp/graph13889365500702849496.bin, -w, /tmp/graph13889365500702849496.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/graph13889365500702849496.bin, -l, -1, -v, -w, /tmp/graph13889365500702849496.weights, -q, 0, -e, 0.001], workingDir=null]
[2020-05-18 18:49:47] [INFO ] Decomposing Gal with order
[2020-05-18 18:49:47] [INFO ] Rewriting arrays to variables to allow decomposition.
[2020-05-18 18:49:47] [INFO ] Removed a total of 43 redundant transitions.
[2020-05-18 18:49:47] [INFO ] Flatten gal took : 35 ms
[2020-05-18 18:49:47] [INFO ] Fuse similar labels procedure discarded/fused a total of 0 labels/synchronizations in 2 ms.
[2020-05-18 18:49:47] [INFO ] Time to serialize gal into /home/mcc/execution/CTLCardinality.pnml.gal : 3 ms
[2020-05-18 18:49:47] [INFO ] Time to serialize properties into /home/mcc/execution/CTLCardinality.ctl : 1 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/CTLCardinality.pnml.gal, -t, CGAL, -ctl, /home/mcc/execution/CTLCardinality.ctl, --gen-order, FOLLOW], workingDir=/home/mcc/execution]
its-ctl command run as :
/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202005100927/bin/its-ctl-linux64 --gc-threshold 2000000 --quiet -i /home/mcc/execution/CTLCardinality.pnml.gal -t CGAL -ctl /home/mcc/execution/CTLCardinality.ctl --gen-order FOLLOW
No direction supplied, using forward translation only.
Parsed 12 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,462,0.053556,5712,2,3608,5,6691,6,0,137,3323,0
Converting to forward existential form...Done !
original formula: EG(TRUE)
=> equivalent forward existential formula: [FwdG(Init,TRUE)] != FALSE
(forward)formula 0,1,0.306479,15920,1,0,12,40830,12,3,1001,18869,11
FORMULA NQueens-PT-05-CTLCardinality-00 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: EG(TRUE)
=> equivalent forward existential formula: [FwdG(Init,TRUE)] != FALSE
(forward)formula 1,1,0.306714,15920,1,0,12,40830,12,3,1001,18869,11
FORMULA NQueens-PT-05-CTLCardinality-01 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: EG(AX((gu16.P_1_4<=gu16.R_8)))
=> equivalent forward existential formula: [FwdG(Init,!(EX(!((gu16.P_1_4<=gu16.R_8)))))] != FALSE
Reverse transition relation is exact ! Faster fixpoint algorithm enabled.
(forward)formula 2,1,0.363912,16976,1,0,31,44290,17,19,1007,28197,26
FORMULA NQueens-PT-05-CTLCardinality-04 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: AF(AG(((gu5.P_4_4<=gu5.cY_1)&&(gi5.gu10.P_1_2<=gi5.gu10.L_3))))
=> equivalent forward existential formula: [FwdG(Init,!(!(E(TRUE U !(((gu5.P_4_4<=gu5.cY_1)&&(gi5.gu10.P_1_2<=gi5.gu10.L_3)))))))] = FALSE
(forward)formula 3,0,0.444449,18824,1,0,47,49059,26,33,1056,34626,41
FORMULA NQueens-PT-05-CTLCardinality-05 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !
***************************************
original formula: (AF(((gu16.R_8<=gu16.P_3_4)||(gu16.R_8>=2))) + !(EX((gu7.cX_3<=gu7.P_2_2))))
=> equivalent forward existential formula: [(EY((Init * !(!(EG(!(((gu16.R_8<=gu16.P_3_4)||(gu16.R_8>=2)))))))) * (gu7.cX_3<=gu7.P_2_2))] = FALSE
Hit Full ! (commute/partial/dont) 23/0/2
(forward)formula 4,0,0.509953,20144,1,0,53,53373,35,36,1089,38825,46
FORMULA NQueens-PT-05-CTLCardinality-06 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !
***************************************
original formula: EG(((AX((gu0.P_3_2<=gu0.P_4_0)) + (gu7.P_3_1<=gu7.cX_3)) + ((gi2.gi1.gu13.L_6>=1)&&(gi2.gi0.gu15.L_4>=1))))
=> equivalent forward existential formula: [FwdG(Init,((!(EX(!((gu0.P_3_2<=gu0.P_4_0)))) + (gu7.P_3_1<=gu7.cX_3)) + ((gi2.gi1.gu13.L_6>=1)&&(gi2.gi0.gu15.L_4>=1))))] != FALSE
(forward)formula 5,1,0.532551,20672,1,0,58,54175,39,39,1100,41400,50
FORMULA NQueens-PT-05-CTLCardinality-07 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: EG((EG((gu5.P_4_4<=gu5.P_2_1)) * (gi1.gu2.P_0_3<=gi1.gu2.R_4)))
=> equivalent forward existential formula: [FwdG(Init,(EG((gu5.P_4_4<=gu5.P_2_1)) * (gi1.gu2.P_0_3<=gi1.gu2.R_4)))] != FALSE
Hit Full ! (commute/partial/dont) 23/0/2
(forward)formula 6,1,0.586818,22256,1,0,77,57248,50,55,1148,48754,67
FORMULA NQueens-PT-05-CTLCardinality-08 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: AF(AG((gi5.gu10.P_1_2<1)))
=> equivalent forward existential formula: [FwdG(Init,!(!(E(TRUE U !((gi5.gu10.P_1_2<1))))))] = FALSE
(forward)formula 7,0,0.611643,22520,1,0,93,57994,55,69,1150,50052,82
FORMULA NQueens-PT-05-CTLCardinality-09 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is FALSE !
***************************************
original formula: EG((gi2.gi2.gu9.cX_2>=1))
=> equivalent forward existential formula: [FwdG(Init,(gi2.gi2.gu9.cX_2>=1))] != FALSE
Hit Full ! (commute/partial/dont) 20/0/5
(forward)formula 8,1,0.66007,23312,1,0,95,58812,62,72,1192,51188,85
FORMULA NQueens-PT-05-CTLCardinality-11 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: EG((gu0.P_3_2<=gu0.P_0_0))
=> equivalent forward existential formula: [FwdG(Init,(gu0.P_3_2<=gu0.P_0_0))] != FALSE
Hit Full ! (commute/partial/dont) 23/0/2
(forward)formula 9,1,0.676199,23576,1,0,97,58993,69,75,1231,51603,88
FORMULA NQueens-PT-05-CTLCardinality-12 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: EG(EF(((gu6.P_3_0<=gu6.P_1_0)||(gi2.gi1.gu13.P_2_0>=1))))
=> equivalent forward existential formula: [FwdG(Init,E(TRUE U ((gu6.P_3_0<=gu6.P_1_0)||(gi2.gi1.gu13.P_2_0>=1))))] != FALSE
(forward)formula 10,1,0.721512,23576,1,0,111,59731,73,89,1237,53294,103
FORMULA NQueens-PT-05-CTLCardinality-14 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
original formula: EG(((gi1.gu2.P_0_3<=gi1.gu2.P_0_2)&&(gi2.gi2.gu4.P_4_3<=gi2.gi2.gu4.P_1_3)))
=> equivalent forward existential formula: [FwdG(Init,((gi1.gu2.P_0_3<=gi1.gu2.P_0_2)&&(gi2.gi2.gu4.P_4_3<=gi2.gi2.gu4.P_1_3)))] != FALSE
Hit Full ! (commute/partial/dont) 21/3/4
(forward)formula 11,1,0.743276,23576,1,0,113,60069,80,92,1291,53869,106
FORMULA NQueens-PT-05-CTLCardinality-15 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
Formula is TRUE !
***************************************
BK_STOP 1589827788665
--------------------
content from stderr:
+ export BINDIR=/home/mcc/BenchKit/
+ BINDIR=/home/mcc/BenchKit/
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ CTLCardinality = StateSpace ]]
+ /home/mcc/BenchKit//runeclipse.sh /home/mcc/execution CTLCardinality -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -greatspnpath /home/mcc/BenchKit//greatspn/ -order META -manyOrder -smt -timeout 3600
+ 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 CTLCardinality -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 3600 -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="NQueens-PT-05"
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"
# 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 NQueens-PT-05, 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 r111-csrt-158961257200115"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/NQueens-PT-05.tgz
mv NQueens-PT-05 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 ;