Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2022-input.r006-tajo-165245689000191.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2022-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool itstools
Input is AirplaneLD-COL-0050, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r006-tajo-165245689000191
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 500K
-rw-r--r-- 1 mcc users 11K Apr 29 20:52 CTLCardinality.txt
-rw-r--r-- 1 mcc users 113K Apr 29 20:52 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.5K Apr 29 20:49 CTLFireability.txt
-rw-r--r-- 1 mcc users 60K Apr 29 20:49 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 10 09:33 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K May 10 09:33 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.8K May 9 07:01 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K May 9 07:01 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K May 9 07:01 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K May 9 07:01 LTLFireability.xml
-rw-r--r-- 1 mcc users 9.3K Apr 29 20:57 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 81K Apr 29 20:57 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 7.7K Apr 29 20:55 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 64K Apr 29 20:55 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K May 9 07:01 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K May 9 07:01 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 10 09:33 equiv_pt
-rw-r--r-- 1 mcc users 5 May 10 09:33 instance
-rw-r--r-- 1 mcc users 5 May 10 09:33 iscolored
-rw-r--r-- 1 mcc users 46K 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

here is the order used to build the result vector(from text file)
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-00
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-01
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-02
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-03
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-04
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-05
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-06
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-07
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-08
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-09
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-10
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-11
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-12
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-13
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-14
FORMULA_NAME AirplaneLD-COL-0050-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1654265621544

Running Version 202205111006
[2022-06-03 14:13:43] [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]
[2022-06-03 14:13:43] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2022-06-03 14:13:43] [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.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[2022-06-03 14:13:43] [WARNING] Using fallBack plugin, rng conformance not checked
[2022-06-03 14:13:44] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 720 ms
[2022-06-03 14:13:44] [INFO ] Detected 3 constant HL places corresponding to 152 PT places.
[2022-06-03 14:13:44] [INFO ] Imported 20 HL places and 15 HL transitions for a total of 369 PT places and 612.0 transition bindings in 23 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 34 ms.
Working with output stream class java.io.PrintStream
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-11 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2022-06-03 14:13:44] [INFO ] Built PT skeleton of HLPN with 20 places and 15 transitions 56 arcs in 9 ms.
[2022-06-03 14:13:44] [INFO ] Skeletonized 15 HLPN properties in 1 ms.
Remains 1 properties that can be checked using skeleton over-approximation.
Reduce places removed 3 places and 0 transitions.
Computed a total of 17 stabilizing places and 15 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 17 transition count 15
Ensure Unique test removed 1 transitions
Reduce redundant transitions removed 1 transitions.
[2022-06-03 14:13:44] [INFO ] Flatten gal took : 52 ms
[2022-06-03 14:13:44] [INFO ] Flatten gal took : 3 ms
Symmetric sort wr.t. initial and guards and successors and join/free detected :Altitude
Symmetric sort wr.t. initial detected :Altitude
Transition t3_2 : guard parameter $A(Altitude:100) in guard (OR (GEQ $A 49) (EQ $A 99))introduces in Altitude(100) partition with 2 elements
Transition t3_1 : guard parameter $A(Altitude:100) in guard (AND (LT $A 49) (NEQ $A 99))introduces in Altitude(100) partition with 2 elements
Sort wr.t. initial and guards Altitude has partition Partition [nbSubs=2, partition=[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]]

Applying symmetric unfolding of partitioned symmetric sort :Altitude domain size was 100 reducing to 2 values.
For transition t3_2:(OR (GEQ $A 49) (EQ $A 99)) -> (EQ $A 1)
For transition t3_1:(AND (LT $A 49) (NEQ $A 99)) -> (EQ $A 0)
Symmetric sort wr.t. initial and guards and successors and join/free detected :Speed
Symmetric sort wr.t. initial detected :Speed
Transition t5_2 : guard parameter $S(Speed:50) in guard (OR (LEQ $S 24) (EQ $S 49))introduces in Speed(50) partition with 2 elements
Transition t5_1 : guard parameter $S(Speed:50) in guard (AND (GT $S 24) (NEQ $S 49))introduces in Speed(50) partition with 2 elements
Transition t4_2 : guard parameter $S(Speed:50) in guard (OR (LEQ $S 24) (EQ $S 49))introduces in Speed(50) partition with 2 elements
Transition t4_1 : guard parameter $S(Speed:50) in guard (AND (GT $S 24) (NEQ $S 49))introduces in Speed(50) partition with 2 elements
Sort wr.t. initial and guards Speed has partition Partition [nbSubs=2, partition=[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]]

Applying symmetric unfolding of partitioned symmetric sort :Speed domain size was 50 reducing to 2 values.
For transition t5_2:(OR (LEQ $S 24) (EQ $S 49)) -> (EQ $S 1)
For transition t5_1:(AND (GT $S 24) (NEQ $S 49)) -> (EQ $S 0)
For transition t4_2:(OR (LEQ $S 24) (EQ $S 49)) -> (EQ $S 1)
For transition t4_1:(AND (GT $S 24) (NEQ $S 49)) -> (EQ $S 0)
Symmetric sort wr.t. initial and guards and successors and join/free detected :Signal
Arc [19:1*[1]] contains constants of sort Signal
Transition t5_2 : constants on arcs in [[19:1*[1]]] introduces in Signal(2) partition with 1 elements that refines current partition to 2 subsets.
Symmetric sort wr.t. initial and guards and successors and join/free detected :Weight
Symmetric sort wr.t. initial detected :Weight
Transition t2_2 : guard parameter $W(Weight:2) in guard (EQ $W 1)introduces in Weight(2) partition with 2 elements
[2022-06-03 14:13:44] [INFO ] Unfolded HLPN to a Petri net with 29 places and 20 transitions 56 arcs in 19 ms.
[2022-06-03 14:13:44] [INFO ] Unfolded 15 HLPN properties in 0 ms.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
[2022-06-03 14:13:44] [INFO ] Reduced 1 identical enabling conditions.
Reduce places removed 6 places and 0 transitions.
Incomplete random walk after 10000 steps, including 1248 resets, run finished after 475 ms. (steps per millisecond=21 ) properties (out of 15) seen :7
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-15 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-07 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-04 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-03 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-00 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 246 resets, run finished after 118 ms. (steps per millisecond=84 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 262 resets, run finished after 76 ms. (steps per millisecond=131 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 231 resets, run finished after 57 ms. (steps per millisecond=175 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10000 steps, including 250 resets, run finished after 80 ms. (steps per millisecond=125 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 249 resets, run finished after 57 ms. (steps per millisecond=175 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 233 resets, run finished after 30 ms. (steps per millisecond=333 ) properties (out of 8) seen :0
Incomplete Best-First random walk after 10001 steps, including 236 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 246 resets, run finished after 39 ms. (steps per millisecond=256 ) properties (out of 8) seen :0
Running SMT prover for 8 properties.
// Phase 1: matrix 20 rows 23 cols
[2022-06-03 14:13:45] [INFO ] Computed 3 place invariants in 9 ms
[2022-06-03 14:13:45] [INFO ] [Real]Absence check using 2 positive place invariants in 4 ms returned sat
[2022-06-03 14:13:45] [INFO ] [Real]Absence check using 2 positive and 1 generalized place invariants in 1 ms returned sat
[2022-06-03 14:13:45] [INFO ] After 194ms SMT Verify possible using all constraints in real domain returned unsat :3 sat :0 real:5
[2022-06-03 14:13:45] [INFO ] [Nat]Absence check using 2 positive place invariants in 1 ms returned sat
[2022-06-03 14:13:45] [INFO ] [Nat]Absence check using 2 positive and 1 generalized place invariants in 0 ms returned sat
[2022-06-03 14:13:45] [INFO ] After 90ms SMT Verify possible using all constraints in natural domain returned unsat :8 sat :0
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-14 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-13 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-12 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-10 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-09 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-08 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-06 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA AirplaneLD-COL-0050-ReachabilityFireability-01 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 8 Parikh solutions to 0 different solutions.
Parikh walk visited 0 properties in 2 ms.
All properties solved without resorting to model-checking.
Total runtime 2556 ms.

BK_STOP 1654265625789

--------------------
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
+ [[ 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
+ 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 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=@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="AirplaneLD-COL-0050"
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 AirplaneLD-COL-0050, 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 r006-tajo-165245689000191"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/AirplaneLD-COL-0050.tgz
mv AirplaneLD-COL-0050 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 ;