About the Execution of ITS-Tools for DNAwalker-PT-14ringLRLarge
| Execution Summary | |||||
| Max Memory Used (MB)  | 
      Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status  | 
   
| 1897.216 | 57500.00 | 118137.00 | 238.30 | F | 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.r067-tall-165254778200296.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 DNAwalker-PT-14ringLRLarge, examination is ReachabilityDeadlock
    Time confinement is 1800 seconds
    Memory confinement is 16384 MBytes
    Number of cores is 4
    Run identifier is r067-tall-165254778200296
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 392K
-rw-r--r-- 1 mcc users 7.2K Apr 29 18:07 CTLCardinality.txt
-rw-r--r-- 1 mcc users  81K Apr 29 18:07 CTLCardinality.xml
-rw-r--r-- 1 mcc users 7.2K Apr 29 18:07 CTLFireability.txt
-rw-r--r-- 1 mcc users  67K Apr 29 18:07 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 10 09:33 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 4.0K May  9 07:34 LTLCardinality.txt
-rw-r--r-- 1 mcc users  29K May  9 07:34 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.5K May  9 07:34 LTLFireability.txt
-rw-r--r-- 1 mcc users  17K May  9 07:34 LTLFireability.xml
-rw-r--r-- 1 mcc users 1.7K May  9 07:34 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K May  9 07:34 UpperBounds.xml
-rw-r--r-- 1 mcc users    6 May 10 09:33 equiv_col
-rw-r--r-- 1 mcc users   14 May 10 09:33 instance
-rw-r--r-- 1 mcc users    6 May 10 09:33 iscolored
-rw-r--r-- 1 mcc users 135K May 10 09:33 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 ReachabilityDeadlock
=== Now, execution of the tool begins
BK_START 1652567455679
Running Version 202205111006
[2022-05-14 22:30:56] [INFO   ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityDeadlock, -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] 
[2022-05-14 22:30:56] [INFO   ] Parsing pnml file : /home/mcc/execution/model.pnml 
[2022-05-14 22:30:57] [INFO   ] Load time of PNML (sax parser for PT used): 95 ms 
[2022-05-14 22:30:57] [INFO   ] Transformed 33 places. 
[2022-05-14 22:30:57] [INFO   ] Transformed 312 transitions. 
[2022-05-14 22:30:57] [INFO   ] Parsed PT model containing 33 places and 312 transitions in 195 ms. 
Parsed 1 properties from file /home/mcc/execution/ReachabilityDeadlock.xml in 3 ms.
Working with output stream class java.io.PrintStream
Built sparse matrix representations for Structural reductions in 4 ms.8624KB memory used
Starting structural reductions in DEADLOCKS mode, iteration 0 : 33/33 places, 312/312 transitions.
Computed a total of 6 stabilizing places and 12 stable transitions
Computed a total of 6 stabilizing places and 12 stable transitions
Computed a total of 6 stabilizing places and 12 stable transitions
Applied a total of 0 rules in 33 ms. Remains 33 /33 variables (removed 0) and now considering 312/312 (removed 0) transitions.
[2022-05-14 22:30:57] [INFO   ] Flow matrix only has 311 transitions (discarded 1 similar events) 
// Phase 1: matrix 311 rows 33 cols
[2022-05-14 22:30:57] [INFO   ] Computed 0 place invariants in 16 ms 
[2022-05-14 22:30:57] [INFO   ] Dead Transitions using invariants and state equation in 239 ms found 0 transitions. 
Finished structural reductions, in 1 iterations. Remains : 33/33 places, 312/312 transitions.
Starting structural reductions in DEADLOCKS mode, iteration 0 : 33/33 places, 312/312 transitions.
Computed a total of 6 stabilizing places and 12 stable transitions
Computed a total of 6 stabilizing places and 12 stable transitions
Computed a total of 6 stabilizing places and 12 stable transitions
Applied a total of 0 rules in 18 ms. Remains 33 /33 variables (removed 0) and now considering 312/312 (removed 0) transitions.
[2022-05-14 22:30:57] [INFO   ] Flow matrix only has 311 transitions (discarded 1 similar events) 
// Phase 1: matrix 311 rows 33 cols
[2022-05-14 22:30:57] [INFO   ] Computed 0 place invariants in 5 ms 
[2022-05-14 22:30:57] [INFO   ] Implicit Places using invariants in 63 ms returned [] 
[2022-05-14 22:30:57] [INFO   ] Flow matrix only has 311 transitions (discarded 1 similar events) 
// Phase 1: matrix 311 rows 33 cols
[2022-05-14 22:30:57] [INFO   ] Computed 0 place invariants in 3 ms 
[2022-05-14 22:30:57] [INFO   ] State equation strengthened by 71 read => feed constraints. 
[2022-05-14 22:30:57] [INFO   ] Implicit Places using invariants and state equation in 407 ms returned [] 
Implicit Place search using SMT with State Equation took 473 ms to find 0 implicit places.
[2022-05-14 22:30:57] [INFO   ] Redundant transitions in 26 ms returned [] 
[2022-05-14 22:30:57] [INFO   ] Flow matrix only has 311 transitions (discarded 1 similar events) 
// Phase 1: matrix 311 rows 33 cols
[2022-05-14 22:30:57] [INFO   ] Computed 0 place invariants in 3 ms 
[2022-05-14 22:30:58] [INFO   ] Dead Transitions using invariants and state equation in 122 ms found 0 transitions. 
Finished structural reductions, in 1 iterations. Remains : 33/33 places, 312/312 transitions.
Random walk for 1250000  steps, including 96652 resets, run took 4795 ms (no deadlock found). (steps per millisecond=260 )
Random directed walk for 1250001  steps, including 21822 resets, run took 3278 ms (no deadlock found). (steps per millisecond=381 )
[2022-05-14 22:31:06] [INFO   ] Flow matrix only has 311 transitions (discarded 1 similar events) 
// Phase 1: matrix 311 rows 33 cols
[2022-05-14 22:31:06] [INFO   ] Computed 0 place invariants in 5 ms 
[2022-05-14 22:31:06] [INFO   ] [Real]Adding state equation constraints to refine reachable states. 
[2022-05-14 22:31:06] [INFO   ] [Real]Absence check using state equation in 37 ms returned sat 
[2022-05-14 22:31:06] [INFO   ] Solution in real domain found non-integer solution. 
[2022-05-14 22:31:06] [INFO   ] [Nat]Adding state equation constraints to refine reachable states. 
[2022-05-14 22:31:06] [INFO   ] [Nat]Absence check using state equation in 55 ms returned sat 
[2022-05-14 22:31:06] [INFO   ] State equation strengthened by 71 read => feed constraints. 
[2022-05-14 22:31:06] [INFO   ] [Nat]Added 71 Read/Feed constraints in 14 ms returned sat 
[2022-05-14 22:31:06] [INFO   ] Computed and/alt/rep : 72/612/72 causal constraints (skipped 209 transitions) in 53 ms. 
[2022-05-14 22:31:09] [INFO   ] Added : 3 causal constraints over 2 iterations in 2797 ms. Result :sat 
Attempting to minimize the solution found.
Minimization took 8 ms.
Parikh directed walk for 1700  steps, including 143 resets, run took 9 ms. (steps per millisecond=188 )
Random directed walk for 500009  steps, including 8717 resets, run took 1312 ms (no deadlock found). (steps per millisecond=381 )
Random walk for 500000  steps, including 38721 resets, run took 1855 ms (no deadlock found). (steps per millisecond=269 )
Random directed walk for 500004  steps, including 8734 resets, run took 1315 ms (no deadlock found). (steps per millisecond=380 )
Random walk for 500000  steps, including 38647 resets, run took 1818 ms (no deadlock found). (steps per millisecond=275 )
Starting structural reductions in DEADLOCKS mode, iteration 0 : 33/33 places, 312/312 transitions.
Computed a total of 6 stabilizing places and 12 stable transitions
Computed a total of 6 stabilizing places and 12 stable transitions
Computed a total of 6 stabilizing places and 12 stable transitions
Applied a total of 0 rules in 10 ms. Remains 33 /33 variables (removed 0) and now considering 312/312 (removed 0) transitions.
[2022-05-14 22:31:15] [INFO   ] Flow matrix only has 311 transitions (discarded 1 similar events) 
// Phase 1: matrix 311 rows 33 cols
[2022-05-14 22:31:15] [INFO   ] Computed 0 place invariants in 1 ms 
[2022-05-14 22:31:15] [INFO   ] Implicit Places using invariants in 71 ms returned [] 
[2022-05-14 22:31:15] [INFO   ] Flow matrix only has 311 transitions (discarded 1 similar events) 
// Phase 1: matrix 311 rows 33 cols
[2022-05-14 22:31:15] [INFO   ] Computed 0 place invariants in 1 ms 
[2022-05-14 22:31:15] [INFO   ] State equation strengthened by 71 read => feed constraints. 
[2022-05-14 22:31:16] [INFO   ] Implicit Places using invariants and state equation in 450 ms returned [] 
Implicit Place search using SMT with State Equation took 526 ms to find 0 implicit places.
[2022-05-14 22:31:16] [INFO   ] Redundant transitions in 15 ms returned [] 
[2022-05-14 22:31:16] [INFO   ] Flow matrix only has 311 transitions (discarded 1 similar events) 
// Phase 1: matrix 311 rows 33 cols
[2022-05-14 22:31:16] [INFO   ] Computed 0 place invariants in 1 ms 
[2022-05-14 22:31:16] [INFO   ] Dead Transitions using invariants and state equation in 215 ms found 0 transitions. 
Finished structural reductions, in 1 iterations. Remains : 33/33 places, 312/312 transitions.
Random walk for 1250000  steps, including 96750 resets, run took 4581 ms (no deadlock found). (steps per millisecond=272 )
Random directed walk for 1250007  steps, including 21790 resets, run took 3344 ms (no deadlock found). (steps per millisecond=373 )
[2022-05-14 22:31:24] [INFO   ] Flow matrix only has 311 transitions (discarded 1 similar events) 
// Phase 1: matrix 311 rows 33 cols
[2022-05-14 22:31:24] [INFO   ] Computed 0 place invariants in 2 ms 
[2022-05-14 22:31:24] [INFO   ] [Real]Adding state equation constraints to refine reachable states. 
[2022-05-14 22:31:24] [INFO   ] [Real]Absence check using state equation in 37 ms returned sat 
[2022-05-14 22:31:24] [INFO   ] Solution in real domain found non-integer solution. 
[2022-05-14 22:31:24] [INFO   ] [Nat]Adding state equation constraints to refine reachable states. 
[2022-05-14 22:31:24] [INFO   ] [Nat]Absence check using state equation in 56 ms returned sat 
[2022-05-14 22:31:24] [INFO   ] State equation strengthened by 71 read => feed constraints. 
[2022-05-14 22:31:24] [INFO   ] [Nat]Added 71 Read/Feed constraints in 20 ms returned sat 
[2022-05-14 22:31:24] [INFO   ] Computed and/alt/rep : 72/612/72 causal constraints (skipped 209 transitions) in 22 ms. 
[2022-05-14 22:31:27] [INFO   ] Added : 3 causal constraints over 2 iterations in 2823 ms. Result :sat 
Attempting to minimize the solution found.
Minimization took 14 ms.
Parikh directed walk for 1700  steps, including 144 resets, run took 8 ms. (steps per millisecond=212 )
Random directed walk for 500012  steps, including 8708 resets, run took 1367 ms (no deadlock found). (steps per millisecond=365 )
Random walk for 500000  steps, including 38706 resets, run took 1833 ms (no deadlock found). (steps per millisecond=272 )
Random directed walk for 500000  steps, including 8696 resets, run took 1326 ms (no deadlock found). (steps per millisecond=377 )
Random walk for 500000  steps, including 38640 resets, run took 1823 ms (no deadlock found). (steps per millisecond=274 )
[2022-05-14 22:31:33] [INFO   ] Flatten gal took : 62 ms 
Using solver Z3 to compute partial order matrices.
Built C files in : 
/tmp/ltsmin3658494480469316067
[2022-05-14 22:31:34] [INFO   ] Applying decomposition  
[2022-05-14 22:31:34] [INFO   ] Flatten gal took : 22 ms 
[2022-05-14 22:31:34] [INFO   ] Computing symmetric may disable matrix : 312 transitions. 
[2022-05-14 22:31:34] [INFO   ] Computation of Complete disable matrix. took 2 ms. Total solver calls (SAT/UNSAT): 0(0/0) 
[2022-05-14 22:31:34] [INFO   ] Computing symmetric may enable matrix : 312 transitions. 
[2022-05-14 22:31:34] [INFO   ] Computation of Complete enable matrix. took 4 ms. Total solver calls (SAT/UNSAT): 0(0/0) 
[2022-05-14 22:31:34] [INFO   ] Computing Do-Not-Accords matrix : 312 transitions. 
[2022-05-14 22:31:34] [INFO   ] Computation of Completed DNA matrix. took 19 ms. Total solver calls (SAT/UNSAT): 0(0/0) 
[2022-05-14 22:31:34] [INFO   ] Built C files in 141ms conformant to PINS (ltsmin variant)in folder :/tmp/ltsmin3658494480469316067 
Running compilation step : cd /tmp/ltsmin3658494480469316067;'/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202205111006/bin/limit_time.pl' '360' 'gcc' '-c' '-I/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202205111006/bin/include/' '-I.' '-std=c99' '-fPIC' '-O0' 'model.c' 
Converted graph to binary with : '/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202205111006/bin/convert-linux64' '-i' '/tmp/graph880474061489079263.txt' '-o' '/tmp/graph880474061489079263.bin' '-w' '/tmp/graph880474061489079263.weights' 
Built communities with : '/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.louvain.binaries_1.0.0.202205111006/bin/louvain-linux64' '/tmp/graph880474061489079263.bin' '-l' '-1' '-v' '-w' '/tmp/graph880474061489079263.weights' '-q' '0' '-e' '0.001' 
[2022-05-14 22:31:34] [INFO   ] Decomposing Gal with order  
[2022-05-14 22:31:34] [INFO   ] Rewriting arrays  to variables to allow decomposition. 
[2022-05-14 22:31:34] [INFO   ] Removed a total of 544 redundant transitions. 
[2022-05-14 22:31:34] [INFO   ] Flatten gal took : 199 ms 
[2022-05-14 22:31:34] [INFO   ] Fuse similar labels procedure discarded/fused a total of 0 labels/synchronizations in 3 ms. 
[2022-05-14 22:31:34] [INFO   ] Time to serialize gal into /tmp/ReachabilityDeadlock337784955011428463.gal : 23 ms 
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202205111006/bin/its-ctl-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityDeadlock337784955011428463.gal' '-t' 'CGAL' '-ctl' 'DEADLOCK' 
its-ctl command run as :
/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202205111006/bin/its-ctl-linux64  --gc-threshold  2000000  --quiet  -i  /tmp/R...224
No direction supplied, using forward translation only.
Compilation finished in 1045 ms.
Running link step : cd /tmp/ltsmin3658494480469316067;'gcc' '-shared' '-o' 'gal.so' 'model.o' 
Link finished in 40 ms.
Running LTSmin : cd /tmp/ltsmin3658494480469316067;'/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.ltsmin.binaries_1.0.0.202205111006/bin/pins2lts-mc-linux64' './gal.so' '--threads=8' '-p' '--pins-guards' '--when' '-d' 
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,1.86088e+09,6.92654,196548,9094,9,358632,203,379,691959,14,193,0
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
dead,0,8.54713,196548,1,0,358632,203,1378,691959,51,207,297730
System contains 0 deadlocks  (shown below if less than --print-limit option) !
FORMULA ReachabilityDeadlock FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN
[ 0 ]
ITS tools runner thread asked to quit. Dying gracefully.
WARNING : LTS min runner thread was asked to interrupt. Dying gracefully.
Total runtime 56221 ms.
BK_STOP 1652567513179
--------------------
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
+ [[ ReachabilityDeadlock = StateSpace ]]
+ /home/mcc/BenchKit/bin//..//runeclipse.sh /home/mcc/execution ReachabilityDeadlock -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 ReachabilityDeadlock -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="DNAwalker-PT-14ringLRLarge"
export BK_EXAMINATION="ReachabilityDeadlock"
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 DNAwalker-PT-14ringLRLarge, examination is ReachabilityDeadlock"
echo "    Time confinement is $BK_TIME_CONFINEMENT seconds"
echo "    Memory confinement is 16384 MBytes"
echo "    Number of cores is 4"
echo "    Run identifier is r067-tall-165254778200296"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/DNAwalker-PT-14ringLRLarge.tgz
mv DNAwalker-PT-14ringLRLarge execution
cd execution
if [ "ReachabilityDeadlock" = "ReachabilityDeadlock" ] || [ "ReachabilityDeadlock" = "UpperBounds" ] || [ "ReachabilityDeadlock" = "QuasiLiveness" ] || [ "ReachabilityDeadlock" = "StableMarking" ] || [ "ReachabilityDeadlock" = "Liveness" ] || [ "ReachabilityDeadlock" = "OneSafe" ] || [ "ReachabilityDeadlock" = "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 [ "ReachabilityDeadlock" = "UpperBounds" ] ; then
	echo "The expected result is a vector of positive values"
	echo NUM_VECTOR
elif [ "ReachabilityDeadlock" != "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 "ReachabilityDeadlock.txt" ] ; then
	echo "here is the order used to build the result vector(from text file)"
	for x in $(grep Property ReachabilityDeadlock.txt | cut -d ' ' -f 2 | sort -u) ; do
		echo "FORMULA_NAME $x"
	done
elif [ -f "ReachabilityDeadlock.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 [ "ReachabilityDeadlock" = "ReachabilityDeadlock" ] || [ "ReachabilityDeadlock" = "QuasiLiveness" ] || [ "ReachabilityDeadlock" = "StableMarking" ] || [ "ReachabilityDeadlock" = "Liveness" ] || [ "ReachabilityDeadlock" = "OneSafe" ] ; then
	echo "FORMULA_NAME ReachabilityDeadlock"
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 ;
