Execution Chart

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

Trace from the execution

Formatting '/mnt/tpsp/fkordon/mcc2023-input.r043-tajo-167813696300015.qcow2', fmt=qcow2 size=4294967296 backing_file='/mnt/tpsp/fkordon/mcc2023-input.qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Waiting for the VM to be ready (probing ssh)
.....................
=====================================================================
Generated by BenchKit 2-5348
Executing tool smartxred
Input is BridgeAndVehicles-COL-V10P10N10, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r043-tajo-167813696300015
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 628K
-rw-r--r-- 1 mcc users 9.8K Feb 25 12:04 CTLCardinality.txt
-rw-r--r-- 1 mcc users 98K Feb 25 12:04 CTLCardinality.xml
-rw-r--r-- 1 mcc users 7.8K Feb 25 12:03 CTLFireability.txt
-rw-r--r-- 1 mcc users 64K Feb 25 12:03 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:40 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.4K Jan 29 11:40 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.1K Feb 25 15:35 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Feb 25 15:35 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.8K Feb 25 15:35 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K Feb 25 15:35 LTLFireability.xml
-rw-r--r-- 1 mcc users 18K Feb 25 12:09 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 172K Feb 25 12:09 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 14K Feb 25 12:08 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 98K Feb 25 12:08 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K Feb 25 15:35 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K Feb 25 15:35 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Mar 5 18:22 equiv_pt
-rw-r--r-- 1 mcc users 10 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 5 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 38K Mar 5 18:22 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 BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-00
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-01
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-02
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-03
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-04
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-05
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-06
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-07
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-08
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-09
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-10
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-11
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-12
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-13
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-14
FORMULA_NAME BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-15

=== Now, execution of the tool begins

BK_START 1678775472704

bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
Invoking MCC driver with
BK_TOOL=smartxred
BK_EXAMINATION=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=BridgeAndVehicles-COL-V10P10N10
Applying reductions before tool smart
Invoking reducer
Running Version 202303021504
[2023-03-14 06:31:14] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -timeout, 360, -rebuildPNML]
[2023-03-14 06:31:14] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-14 06:31:14] [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.
[2023-03-14 06:31:14] [WARNING] Using fallBack plugin, rng conformance not checked
[2023-03-14 06:31:14] [INFO ] Load time of PNML (colored model parsed with PNMLFW) : 482 ms
[2023-03-14 06:31:14] [INFO ] Imported 15 HL places and 11 HL transitions for a total of 48 PT places and 5438.0 transition bindings in 20 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 18 ms.
Working with output stream class java.io.PrintStream
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-05 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2023-03-14 06:31:14] [INFO ] Built PT skeleton of HLPN with 15 places and 11 transitions 56 arcs in 4 ms.
[2023-03-14 06:31:14] [INFO ] Skeletonized 15 HLPN properties in 1 ms.
All 15 properties of the HLPN use transition enablings in a way that makes the skeleton too coarse.
Arc [13:1*[(MOD (ADD $cpt 1) 11)]] contains successor/predecessor on variables of sort compteur
Arc [1:1*[(MOD (ADD $cA 1) 11)]] contains successor/predecessor on variables of sort voitureA
Arc [6:1*[(MOD (ADD (MOD (MINUS $cB 1) 11) 11) 11)]] contains successor/predecessor on variables of sort voitureB
Arc [14:1*[(MOD (ADD $s 1) 2)]] contains successor/predecessor on variables of sort sens
[2023-03-14 06:31:14] [INFO ] Unfolded HLPN to a Petri net with 48 places and 288 transitions 2090 arcs in 25 ms.
[2023-03-14 06:31:14] [INFO ] Unfolded 15 HLPN properties in 2 ms.
Initial state reduction rules removed 3 formulas.
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-09 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-10 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-12 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 10000 steps, including 111 resets, run finished after 486 ms. (steps per millisecond=20 ) properties (out of 12) seen :7
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-15 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-14 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-13 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-11 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-08 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-06 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-04 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10000 steps, including 47 resets, run finished after 244 ms. (steps per millisecond=40 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10000 steps, including 53 resets, run finished after 347 ms. (steps per millisecond=28 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 36 resets, run finished after 347 ms. (steps per millisecond=28 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 45 resets, run finished after 319 ms. (steps per millisecond=31 ) properties (out of 5) seen :0
Incomplete Best-First random walk after 10001 steps, including 49 resets, run finished after 535 ms. (steps per millisecond=18 ) properties (out of 5) seen :0
Running SMT prover for 5 properties.
[2023-03-14 06:31:17] [INFO ] Flow matrix only has 90 transitions (discarded 198 similar events)
// Phase 1: matrix 90 rows 48 cols
[2023-03-14 06:31:17] [INFO ] Computed 7 place invariants in 16 ms
[2023-03-14 06:31:18] [INFO ] [Real]Absence check using 7 positive place invariants in 11 ms returned sat
[2023-03-14 06:31:18] [INFO ] After 308ms SMT Verify possible using all constraints in real domain returned unsat :1 sat :0 real:4
[2023-03-14 06:31:18] [INFO ] [Nat]Absence check using 7 positive place invariants in 3 ms returned sat
[2023-03-14 06:31:20] [INFO ] After 2402ms SMT Verify possible using state equation in natural domain returned unsat :2 sat :3
[2023-03-14 06:31:20] [INFO ] State equation strengthened by 22 read => feed constraints.
[2023-03-14 06:31:23] [INFO ] After 2096ms SMT Verify possible using 22 Read/Feed constraints in natural domain returned unsat :2 sat :3
[2023-03-14 06:31:25] [INFO ] After 4389ms SMT Verify possible using trap constraints in natural domain returned unsat :2 sat :3
Attempting to minimize the solution found.
Minimization took 2189 ms.
[2023-03-14 06:31:27] [INFO ] After 9184ms SMT Verify possible using all constraints in natural domain returned unsat :2 sat :3
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-03 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA BridgeAndVehicles-COL-V10P10N10-ReachabilityFireability-00 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 5 Parikh solutions to 3 different solutions.
Parikh walk visited 0 properties in 16 ms.
Support contains 46 out of 48 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 48/48 places, 288/288 transitions.
Graph (complete) has 342 edges and 48 vertex of which 46 are kept as prefixes of interest. Removing 2 places using SCC suffix rule.2 ms
Discarding 2 places :
Also discarding 0 output transitions
Applied a total of 1 rules in 51 ms. Remains 46 /48 variables (removed 2) and now considering 288/288 (removed 0) transitions.
[2023-03-14 06:31:27] [INFO ] Flow matrix only has 90 transitions (discarded 198 similar events)
// Phase 1: matrix 90 rows 46 cols
[2023-03-14 06:31:27] [INFO ] Computed 5 place invariants in 2 ms
[2023-03-14 06:31:27] [INFO ] Dead Transitions using invariants and state equation in 361 ms found 0 transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 413 ms. Remains : 46/48 places, 288/288 transitions.
Incomplete random walk after 10000 steps, including 111 resets, run finished after 318 ms. (steps per millisecond=31 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 10001 steps, including 53 resets, run finished after 317 ms. (steps per millisecond=31 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 10000 steps, including 36 resets, run finished after 316 ms. (steps per millisecond=31 ) properties (out of 3) seen :0
Incomplete Best-First random walk after 10000 steps, including 49 resets, run finished after 695 ms. (steps per millisecond=14 ) properties (out of 3) seen :0
Interrupted probabilistic random walk after 443551 steps, run timeout after 3001 ms. (steps per millisecond=147 ) properties seen :{}
Probabilistic random walk after 443551 steps, saw 109243 distinct states, run finished after 3002 ms. (steps per millisecond=147 ) properties seen :0
Running SMT prover for 3 properties.
[2023-03-14 06:31:32] [INFO ] Flow matrix only has 90 transitions (discarded 198 similar events)
[2023-03-14 06:31:32] [INFO ] Invariant cache hit.
[2023-03-14 06:31:33] [INFO ] After 77ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:3
[2023-03-14 06:31:33] [INFO ] [Nat]Absence check using 5 positive place invariants in 1 ms returned sat
[2023-03-14 06:31:35] [INFO ] After 2494ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :3
[2023-03-14 06:31:35] [INFO ] State equation strengthened by 22 read => feed constraints.
[2023-03-14 06:31:37] [INFO ] After 2132ms SMT Verify possible using 22 Read/Feed constraints in natural domain returned unsat :0 sat :3
[2023-03-14 06:31:40] [INFO ] After 4512ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :3
Attempting to minimize the solution found.
Minimization took 2107 ms.
[2023-03-14 06:31:42] [INFO ] After 9229ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :3
Parikh walk visited 0 properties in 6 ms.
Support contains 46 out of 46 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 46/46 places, 288/288 transitions.
Applied a total of 0 rules in 10 ms. Remains 46 /46 variables (removed 0) and now considering 288/288 (removed 0) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 11 ms. Remains : 46/46 places, 288/288 transitions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 46/46 places, 288/288 transitions.
Applied a total of 0 rules in 9 ms. Remains 46 /46 variables (removed 0) and now considering 288/288 (removed 0) transitions.
[2023-03-14 06:31:42] [INFO ] Flow matrix only has 90 transitions (discarded 198 similar events)
[2023-03-14 06:31:42] [INFO ] Invariant cache hit.
[2023-03-14 06:31:42] [INFO ] Implicit Places using invariants in 40 ms returned []
[2023-03-14 06:31:42] [INFO ] Flow matrix only has 90 transitions (discarded 198 similar events)
[2023-03-14 06:31:42] [INFO ] Invariant cache hit.
[2023-03-14 06:31:42] [INFO ] State equation strengthened by 22 read => feed constraints.
[2023-03-14 06:31:42] [INFO ] Implicit Places using invariants and state equation in 62 ms returned []
Implicit Place search using SMT with State Equation took 104 ms to find 0 implicit places.
[2023-03-14 06:31:42] [INFO ] Redundant transitions in 11 ms returned []
[2023-03-14 06:31:42] [INFO ] Flow matrix only has 90 transitions (discarded 198 similar events)
[2023-03-14 06:31:42] [INFO ] Invariant cache hit.
[2023-03-14 06:31:42] [INFO ] Dead Transitions using invariants and state equation in 114 ms found 0 transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 246 ms. Remains : 46/46 places, 288/288 transitions.
Ensure Unique test removed 198 transitions
Reduce isomorphic transitions removed 198 transitions.
Iterating post reduction 0 with 198 rules applied. Total rules applied 198 place count 46 transition count 90
Applied a total of 198 rules in 3 ms. Remains 46 /46 variables (removed 0) and now considering 90/288 (removed 198) transitions.
Running SMT prover for 3 properties.
[2023-03-14 06:31:42] [INFO ] Invariant cache hit.
[2023-03-14 06:31:42] [INFO ] After 72ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:3
[2023-03-14 06:31:43] [INFO ] [Nat]Absence check using 5 positive place invariants in 1 ms returned sat
[2023-03-14 06:31:45] [INFO ] After 2139ms SMT Verify possible using state equation in natural domain returned unsat :0 sat :3
[2023-03-14 06:31:47] [INFO ] After 4295ms SMT Verify possible using trap constraints in natural domain returned unsat :0 sat :3
Attempting to minimize the solution found.
Minimization took 2268 ms.
[2023-03-14 06:31:49] [INFO ] After 6652ms SMT Verify possible using all constraints in natural domain returned unsat :0 sat :3
[2023-03-14 06:31:49] [INFO ] Export to MCC of 3 properties in file /home/mcc/execution/ReachabilityFireability.sr.xml took 36 ms.
[2023-03-14 06:31:49] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 46 places, 288 transitions and 2088 arcs took 3 ms.
[2023-03-14 06:31:49] [INFO ] Flatten gal took : 81 ms
Total runtime 35579 ms.
There are residual formulas that ITS could not solve within timeout
======================================================
========== this is Smart for the MCC'2018 ============
======================================================
Running BridgeAndVehicles (COL), instance V10P10N10
Examination ReachabilityFireability
Parser /home/mcc/BenchKit/bin//../reducer/bin//../../smart/bin//parser/Fireability.jar
Model checker /home/mcc/BenchKit/bin//../reducer/bin//../../smart/bin//rem_exec//smart

GOT IT HERE. BS
Petri model created: 46 places, 288 transitions, 2088 arcs.
Final Score: 939.968
Took : 21 seconds
Reachability Fireability file is: ReachabilityFireability.xml
READY TO PARSE. BS

BK_STOP 1678775532323

--------------------
content from stderr:

+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityFireability -timeout 360 -rebuildPNML
ERROR in file model.sm near line 2435:
syntax error

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="BridgeAndVehicles-COL-V10P10N10"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="smartxred"
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 2-5348"
echo " Executing tool smartxred"
echo " Input is BridgeAndVehicles-COL-V10P10N10, 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 r043-tajo-167813696300015"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/BridgeAndVehicles-COL-V10P10N10.tgz
mv BridgeAndVehicles-COL-V10P10N10 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 ;