About the Execution of ITS-Tools for HealthRecord-PT-16
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
212.283 | 31709.00 | 70110.00 | 353.00 | T | normal |
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-165264480700122.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)
.........................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is HealthRecord-PT-16, examination is QuasiLiveness
Time confinement is 1800 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r121-smll-165264480700122
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 316K
-rw-r--r-- 1 mcc users 5.3K Apr 30 11:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 49K Apr 30 11:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 4.9K Apr 30 11:21 CTLFireability.txt
-rw-r--r-- 1 mcc users 43K Apr 30 11:21 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.7K May 9 08:00 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K May 9 08:00 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K May 9 08:00 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K May 9 08:00 LTLFireability.xml
-rw-r--r-- 1 mcc users 1.6K May 9 08:00 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K May 9 08:00 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 125K 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 1652723851039
Running Version 202205111006
[2022-05-16 17:57:33] [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 17:57:33] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-05-16 17:57:33] [INFO ] Load time of PNML (sax parser for PT used): 267 ms
[2022-05-16 17:57:33] [INFO ] Transformed 453 places.
[2022-05-16 17:57:33] [INFO ] Transformed 594 transitions.
[2022-05-16 17:57:33] [INFO ] Found NUPN structural information;
[2022-05-16 17:57:33] [INFO ] Parsed PT model containing 453 places and 594 transitions in 522 ms.
Starting structural reductions in LIVENESS mode, iteration 0 : 453/453 places, 594/594 transitions.
Graph (trivial) has 536 edges and 453 vertex of which 49 / 453 are part of one of the 17 SCC in 12 ms
Free SCC test removed 32 places
Ensure Unique test removed 35 transitions
Reduce isomorphic transitions removed 35 transitions.
Drop transitions removed 218 transitions
Trivial Post-agglo rules discarded 218 transitions
Performed 218 trivial Post agglomeration. Transition count delta: 218
Iterating post reduction 0 with 218 rules applied. Total rules applied 219 place count 421 transition count 341
Reduce places removed 218 places and 0 transitions.
Ensure Unique test removed 16 transitions
Reduce isomorphic transitions removed 16 transitions.
Drop transitions removed 11 transitions
Trivial Post-agglo rules discarded 11 transitions
Performed 11 trivial Post agglomeration. Transition count delta: 11
Iterating post reduction 1 with 245 rules applied. Total rules applied 464 place count 203 transition count 314
Reduce places removed 11 places and 0 transitions.
Iterating post reduction 2 with 11 rules applied. Total rules applied 475 place count 192 transition count 314
Performed 9 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 3 with 9 Pre rules applied. Total rules applied 475 place count 192 transition count 305
Deduced a syphon composed of 9 places in 2 ms
Reduce places removed 9 places and 0 transitions.
Iterating global reduction 3 with 18 rules applied. Total rules applied 493 place count 183 transition count 305
Discarding 67 places :
Symmetric choice reduction at 3 with 67 rule applications. Total rules 560 place count 116 transition count 177
Iterating global reduction 3 with 67 rules applied. Total rules applied 627 place count 116 transition count 177
Discarding 10 places :
Symmetric choice reduction at 3 with 10 rule applications. Total rules 637 place count 106 transition count 157
Iterating global reduction 3 with 10 rules applied. Total rules applied 647 place count 106 transition count 157
Discarding 8 places :
Symmetric choice reduction at 3 with 8 rule applications. Total rules 655 place count 98 transition count 149
Iterating global reduction 3 with 8 rules applied. Total rules applied 663 place count 98 transition count 149
Ensure Unique test removed 3 transitions
Reduce isomorphic transitions removed 3 transitions.
Iterating post reduction 3 with 3 rules applied. Total rules applied 666 place count 98 transition count 146
Discarding 3 places :
Symmetric choice reduction at 4 with 3 rule applications. Total rules 669 place count 95 transition count 140
Iterating global reduction 4 with 3 rules applied. Total rules applied 672 place count 95 transition count 140
Discarding 3 places :
Symmetric choice reduction at 4 with 3 rule applications. Total rules 675 place count 92 transition count 134
Iterating global reduction 4 with 3 rules applied. Total rules applied 678 place count 92 transition count 134
Discarding 3 places :
Symmetric choice reduction at 4 with 3 rule applications. Total rules 681 place count 89 transition count 128
Iterating global reduction 4 with 3 rules applied. Total rules applied 684 place count 89 transition count 128
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 4 with 2 rules applied. Total rules applied 686 place count 89 transition count 126
Performed 24 Post agglomeration using F-continuation condition.Transition count delta: 24
Deduced a syphon composed of 24 places in 0 ms
Reduce places removed 24 places and 0 transitions.
Iterating global reduction 5 with 48 rules applied. Total rules applied 734 place count 65 transition count 102
Performed 4 Post agglomeration using F-continuation condition.Transition count delta: -30
Deduced a syphon composed of 4 places in 1 ms
Reduce places removed 4 places and 0 transitions.
Iterating global reduction 5 with 8 rules applied. Total rules applied 742 place count 61 transition count 132
Applied a total of 742 rules in 156 ms. Remains 61 /453 variables (removed 392) and now considering 132/594 (removed 462) transitions.
[2022-05-16 17:57:34] [INFO ] Flow matrix only has 116 transitions (discarded 16 similar events)
// Phase 1: matrix 116 rows 61 cols
[2022-05-16 17:57:34] [INFO ] Computed 14 place invariants in 21 ms
[2022-05-16 17:57:34] [INFO ] Implicit Places using invariants in 324 ms returned []
[2022-05-16 17:57:34] [INFO ] Flow matrix only has 116 transitions (discarded 16 similar events)
// Phase 1: matrix 116 rows 61 cols
[2022-05-16 17:57:34] [INFO ] Computed 14 place invariants in 13 ms
[2022-05-16 17:57:34] [INFO ] State equation strengthened by 11 read => feed constraints.
[2022-05-16 17:57:34] [INFO ] Implicit Places using invariants and state equation in 300 ms returned []
Implicit Place search using SMT with State Equation took 682 ms to find 0 implicit places.
[2022-05-16 17:57:34] [INFO ] Flow matrix only has 116 transitions (discarded 16 similar events)
// Phase 1: matrix 116 rows 61 cols
[2022-05-16 17:57:34] [INFO ] Computed 14 place invariants in 8 ms
[2022-05-16 17:57:34] [INFO ] Dead Transitions using invariants and state equation in 193 ms found 0 transitions.
Starting structural reductions in LIVENESS mode, iteration 1 : 61/453 places, 132/594 transitions.
Finished structural reductions, in 1 iterations. Remains : 61/453 places, 132/594 transitions.
Discarding 82 transitions out of 132. Remains 50
Initial state reduction rules removed 1 formulas.
Incomplete random walk after 10000 steps, including 1101 resets, run finished after 1005 ms. (steps per millisecond=9 ) properties (out of 49) seen :40
Incomplete Best-First random walk after 10001 steps, including 86 resets, run finished after 47 ms. (steps per millisecond=212 ) properties (out of 9) seen :0
Incomplete Best-First random walk after 10001 steps, including 84 resets, run finished after 39 ms. (steps per millisecond=256 ) properties (out of 9) seen :1
Incomplete Best-First random walk after 10000 steps, including 98 resets, run finished after 46 ms. (steps per millisecond=217 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 112 resets, run finished after 39 ms. (steps per millisecond=256 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 81 resets, run finished after 37 ms. (steps per millisecond=270 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 81 resets, run finished after 44 ms. (steps per millisecond=227 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 76 resets, run finished after 36 ms. (steps per millisecond=277 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 75 resets, run finished after 33 ms. (steps per millisecond=303 ) properties (out of 8) seen :1
Running SMT prover for 7 properties.
[2022-05-16 17:57:36] [INFO ] Flow matrix only has 116 transitions (discarded 16 similar events)
// Phase 1: matrix 116 rows 61 cols
[2022-05-16 17:57:36] [INFO ] Computed 14 place invariants in 2 ms
[2022-05-16 17:57:36] [INFO ] [Real]Absence check using 8 positive place invariants in 4 ms returned sat
[2022-05-16 17:57:36] [INFO ] [Real]Absence check using 8 positive and 6 generalized place invariants in 3 ms returned sat
[2022-05-16 17:57:36] [INFO ] After 113ms SMT Verify possible using state equation in real domain returned unsat :0 sat :5 real:2
[2022-05-16 17:57:36] [INFO ] State equation strengthened by 11 read => feed constraints.
[2022-05-16 17:57:36] [INFO ] After 56ms SMT Verify possible using 11 Read/Feed constraints in real domain returned unsat :0 sat :0 real:7
[2022-05-16 17:57:36] [INFO ] After 290ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:7
[2022-05-16 17:57:36] [INFO ] [Nat]Absence check using 8 positive place invariants in 4 ms returned sat
[2022-05-16 17:57:36] [INFO ] [Nat]Absence check using 8 positive and 6 generalized place invariants in 5 ms returned sat
[2022-05-16 17:57:36] [INFO ] After 131ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :7
[2022-05-16 17:57:36] [INFO ] After 114ms SMT Verify possible using 11 Read/Feed constraints in natural domain returned unsat :0 sat :7
[2022-05-16 17:57:37] [INFO ] After 281ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :7
Attempting to minimize the solution found.
Minimization took 115 ms.
[2022-05-16 17:57:37] [INFO ] After 636ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :7
Parikh walk visited 0 properties in 6 ms.
Support contains 17 out of 61 places. Attempting structural reductions.
Starting structural reductions in SAFETY mode, iteration 0 : 61/61 places, 132/132 transitions.
Graph (complete) has 258 edges and 61 vertex of which 54 are kept as prefixes of interest. Removing 7 places using SCC suffix rule.9 ms
Discarding 7 places :
Also discarding 7 output transitions
Drop transitions removed 7 transitions
Drop transitions removed 10 transitions
Reduce isomorphic transitions removed 10 transitions.
Iterating post reduction 0 with 10 rules applied. Total rules applied 11 place count 54 transition count 115
Drop transitions removed 15 transitions
Redundant transition composition rules discarded 15 transitions
Iterating global reduction 1 with 15 rules applied. Total rules applied 26 place count 54 transition count 100
Free-agglomeration rule applied 19 times.
Iterating global reduction 1 with 19 rules applied. Total rules applied 45 place count 54 transition count 81
Reduce places removed 19 places and 0 transitions.
Ensure Unique test removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 1 with 21 rules applied. Total rules applied 66 place count 35 transition count 79
Drop transitions removed 4 transitions
Redundant transition composition rules discarded 4 transitions
Iterating global reduction 2 with 4 rules applied. Total rules applied 70 place count 35 transition count 75
Applied a total of 70 rules in 49 ms. Remains 35 /61 variables (removed 26) and now considering 75/132 (removed 57) transitions.
Finished structural reductions, in 1 iterations. Remains : 35/61 places, 75/132 transitions.
Incomplete random walk after 1000000 steps, including 103944 resets, run finished after 15195 ms. (steps per millisecond=65 ) properties (out of 7) seen :4
Incomplete Best-First random walk after 1000001 steps, including 15841 resets, run finished after 3188 ms. (steps per millisecond=313 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 1000001 steps, including 14067 resets, run finished after 2533 ms. (steps per millisecond=394 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 1000001 steps, including 15893 resets, run finished after 2654 ms. (steps per millisecond=376 ) properties (out of 3) seen :0
Running SMT prover for 3 properties.
[2022-05-16 17:58:00] [INFO ] Flow matrix only has 62 transitions (discarded 13 similar events)
// Phase 1: matrix 62 rows 35 cols
[2022-05-16 17:58:00] [INFO ] Computed 7 place invariants in 4 ms
[2022-05-16 17:58:00] [INFO ] [Real]Absence check using 1 positive place invariants in 1 ms returned sat
[2022-05-16 17:58:00] [INFO ] [Real]Absence check using 1 positive and 6 generalized place invariants in 3 ms returned sat
[2022-05-16 17:58:00] [INFO ] After 45ms SMT Verify possible using state equation in real domain returned unsat :0 sat :3
[2022-05-16 17:58:00] [INFO ] State equation strengthened by 9 read => feed constraints.
[2022-05-16 17:58:01] [INFO ] After 23ms SMT Verify possible using 9 Read/Feed constraints in real domain returned unsat :0 sat :0 real:3
[2022-05-16 17:58:01] [INFO ] After 120ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:3
[2022-05-16 17:58:01] [INFO ] [Nat]Absence check using 1 positive place invariants in 1 ms returned sat
[2022-05-16 17:58:01] [INFO ] [Nat]Absence check using 1 positive and 6 generalized place invariants in 3 ms returned sat
[2022-05-16 17:58:01] [INFO ] After 38ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :3
[2022-05-16 17:58:01] [INFO ] After 16ms SMT Verify possible using 9 Read/Feed constraints in natural domain returned unsat :0 sat :3
[2022-05-16 17:58:01] [INFO ] After 38ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :3
Attempting to minimize the solution found.
Minimization took 15 ms.
[2022-05-16 17:58:01] [INFO ] After 133ms 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 85 ms.
Support contains 10 out of 35 places. Attempting structural reductions.
Starting structural reductions in SAFETY mode, iteration 0 : 35/35 places, 75/75 transitions.
Discarding 2 places :
Symmetric choice reduction at 0 with 2 rule applications. Total rules 2 place count 33 transition count 71
Iterating global reduction 0 with 2 rules applied. Total rules applied 4 place count 33 transition count 71
Discarding 1 places :
Symmetric choice reduction at 0 with 1 rule applications. Total rules 5 place count 32 transition count 69
Iterating global reduction 0 with 1 rules applied. Total rules applied 6 place count 32 transition count 69
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 7 place count 32 transition count 68
Free-agglomeration rule applied 2 times.
Iterating global reduction 1 with 2 rules applied. Total rules applied 9 place count 32 transition count 66
Reduce places removed 2 places and 0 transitions.
Ensure Unique test removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 1 with 3 rules applied. Total rules applied 12 place count 30 transition count 65
Drop transitions removed 2 transitions
Redundant transition composition rules discarded 2 transitions
Iterating global reduction 2 with 2 rules applied. Total rules applied 14 place count 30 transition count 63
Partial Free-agglomeration rule applied 2 times.
Drop transitions removed 2 transitions
Iterating global reduction 2 with 2 rules applied. Total rules applied 16 place count 30 transition count 63
Applied a total of 16 rules in 16 ms. Remains 30 /35 variables (removed 5) and now considering 63/75 (removed 12) transitions.
Finished structural reductions, in 1 iterations. Remains : 30/35 places, 63/75 transitions.
Finished random walk after 74112 steps, including 7939 resets, run visited all 3 properties in 1428 ms. (steps per millisecond=51 )
Able to resolve query QuasiLiveness after proving 50 properties.
FORMULA QuasiLiveness TRUE TECHNIQUES RANDOM_WALK BESTFIRST_WALK TOPOLOGICAL INITIAL_STATE
Total runtime 29448 ms.
BK_STOP 1652723882748
--------------------
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-16"
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-16, 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-165264480700122"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/HealthRecord-PT-16.tgz
mv HealthRecord-PT-16 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 '
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 ;