fond
Model Checking Contest 2020
10th edition, Paris, France, June 23, 2020
Execution of r228-oct2-159033547700482
Last Updated
Jun 28, 2020

About the Execution of ITS-LoLa for ViralEpidemic-PT-S02D1C1A12

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
15740.280 3600000.00 3677444.00 561.00 ?F??TF?F?FFT?F?F normal

Execution Chart

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

Trace from the execution

Formatting '/data/fko/mcc2020-input.r228-oct2-159033547700482.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fko/mcc2020-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 itslola
Input is ViralEpidemic-PT-S02D1C1A12, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r228-oct2-159033547700482
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 34M
-rw-r--r-- 1 mcc users 5.7K May 14 04:35 CTLCardinality.txt
-rw-r--r-- 1 mcc users 26K May 14 04:35 CTLCardinality.xml
-rw-r--r-- 1 mcc users 3.6K May 13 22:34 CTLFireability.txt
-rw-r--r-- 1 mcc users 19K May 13 22:34 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.8K May 14 10:07 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K May 14 10:07 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.9K May 14 10:07 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K May 14 10:07 LTLFireability.xml
-rw-r--r-- 1 mcc users 1 May 12 20:42 NewModel
-rw-r--r-- 1 mcc users 4.8K May 13 15:39 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 20K May 13 15:39 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.1K May 13 11:24 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 13K May 13 11:24 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.0K May 13 16:53 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.1K May 13 16:53 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 12 20:42 equiv_col
-rw-r--r-- 1 mcc users 11 May 12 20:42 instance
-rw-r--r-- 1 mcc users 6 May 12 20:42 iscolored
-rw-r--r-- 1 mcc users 34M May 12 20:42 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 ViralEpidemic-PT-S02D1C1A12-00
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-01
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-02
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-03
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-04
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-05
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-06
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-07
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-08
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-09
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-10
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-11
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-12
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-13
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-14
FORMULA_NAME ViralEpidemic-PT-S02D1C1A12-15

=== Now, execution of the tool begins

BK_START 1591304300687

bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
[2020-06-04 20:58:22] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLFireability, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -timeout, 3600, -rebuildPNML]
[2020-06-04 20:58:22] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2020-06-04 20:58:23] [INFO ] Load time of PNML (sax parser for PT used): 771 ms
[2020-06-04 20:58:23] [INFO ] Transformed 32765 places.
[2020-06-04 20:58:23] [INFO ] Transformed 40955 transitions.
[2020-06-04 20:58:23] [INFO ] Parsed PT model containing 32765 places and 40955 transitions in 983 ms.
Parsed 16 properties from file /home/mcc/execution/LTLFireability.xml in 189 ms.
Working with output stream class java.io.PrintStream
Interrupted random walk after 54468 steps, including 5050 resets, run timeout after 30001 ms. (steps per millisecond=1 ) properties seen :[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0]
// Phase 1: matrix 40955 rows 32765 cols
[2020-06-04 20:59:12] [INFO ] Invariants computation overflowed in 19125 ms
[2020-06-04 20:59:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 20:59:32] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 20:59:32] [INFO ] [Real]Absence check using state equation in 18311 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 20:59:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 20:59:52] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 20:59:52] [INFO ] [Real]Absence check using state equation in 18193 ms returned unknown
[2020-06-04 20:59:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:00:12] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:00:12] [INFO ] [Real]Absence check using state equation in 18310 ms returned (error "Failed to check-sat")
[2020-06-04 21:00:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:00:32] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:00:32] [INFO ] [Real]Absence check using state equation in 18429 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 21:00:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:00:52] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:00:52] [INFO ] [Real]Absence check using state equation in 18438 ms returned (error "Failed to check-sat")
[2020-06-04 21:00:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:01:12] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:01:12] [INFO ] [Real]Absence check using state equation in 18418 ms returned unknown
[2020-06-04 21:01:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:01:32] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:01:32] [INFO ] [Real]Absence check using state equation in 18474 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 21:01:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:01:52] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:01:52] [INFO ] [Real]Absence check using state equation in 18431 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 21:01:57] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:02:12] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:02:12] [INFO ] [Real]Absence check using state equation in 15384 ms returned (error "Failed to check-sat")
[2020-06-04 21:02:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:02:32] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:02:32] [INFO ] [Real]Absence check using state equation in 18434 ms returned unknown
[2020-06-04 21:02:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:02:52] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:02:52] [INFO ] [Real]Absence check using state equation in 17972 ms returned unknown
[2020-06-04 21:02:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:03:12] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:03:12] [INFO ] [Real]Absence check using state equation in 18028 ms returned unknown
[2020-06-04 21:03:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:03:32] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:03:32] [INFO ] [Real]Absence check using state equation in 18473 ms returned unknown
[2020-06-04 21:03:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:03:52] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:03:52] [INFO ] [Real]Absence check using state equation in 17958 ms returned unknown
[2020-06-04 21:03:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:04:12] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:04:12] [INFO ] [Real]Absence check using state equation in 18306 ms returned unknown
[2020-06-04 21:04:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:04:32] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:04:32] [INFO ] [Real]Absence check using state equation in 18301 ms returned unknown
[2020-06-04 21:04:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:04:52] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:04:52] [INFO ] [Real]Absence check using state equation in 18481 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 21:04:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:05:12] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:05:13] [INFO ] [Real]Absence check using state equation in 18405 ms returned (error "Failed to check-sat")
[2020-06-04 21:05:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:05:33] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:05:33] [INFO ] [Real]Absence check using state equation in 18496 ms returned unknown
[2020-06-04 21:05:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:05:53] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:05:53] [INFO ] [Real]Absence check using state equation in 18481 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 21:05:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:06:13] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:06:13] [INFO ] [Real]Absence check using state equation in 18453 ms returned unknown
[2020-06-04 21:06:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:06:33] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:06:33] [INFO ] [Real]Absence check using state equation in 18435 ms returned unknown
[2020-06-04 21:06:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:06:53] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:06:53] [INFO ] [Real]Absence check using state equation in 18456 ms returned unknown
[2020-06-04 21:06:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:07:13] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:07:13] [INFO ] [Real]Absence check using state equation in 18500 ms returned unknown
[2020-06-04 21:07:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:07:33] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:07:33] [INFO ] [Real]Absence check using state equation in 18419 ms returned unknown
[2020-06-04 21:07:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:07:53] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:07:53] [INFO ] [Real]Absence check using state equation in 18429 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 21:07:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:08:13] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:08:13] [INFO ] [Real]Absence check using state equation in 18451 ms returned unknown
[2020-06-04 21:08:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:08:33] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:08:33] [INFO ] [Real]Absence check using state equation in 18418 ms returned unknown
[2020-06-04 21:08:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:08:53] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:08:53] [INFO ] [Real]Absence check using state equation in 18413 ms returned unknown
[2020-06-04 21:08:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:09:13] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:09:13] [INFO ] [Real]Absence check using state equation in 18455 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 21:09:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:09:33] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:09:33] [INFO ] [Real]Absence check using state equation in 18505 ms returned unknown
[2020-06-04 21:09:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:09:53] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:09:53] [INFO ] [Real]Absence check using state equation in 18503 ms returned unknown
[2020-06-04 21:09:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:10:13] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:10:13] [INFO ] [Real]Absence check using state equation in 18461 ms returned unknown
[2020-06-04 21:10:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:10:33] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:10:33] [INFO ] [Real]Absence check using state equation in 18402 ms returned unknown
[2020-06-04 21:10:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:10:53] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:10:53] [INFO ] [Real]Absence check using state equation in 18483 ms returned unknown
[2020-06-04 21:10:54] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:11:13] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:11:13] [INFO ] [Real]Absence check using state equation in 18435 ms returned unknown
[2020-06-04 21:11:14] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:11:33] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:11:33] [INFO ] [Real]Absence check using state equation in 18452 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 21:11:34] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2020-06-04 21:11:53] [INFO ] SMT solver returned unknown. Retrying;
[2020-06-04 21:11:53] [INFO ] [Real]Absence check using state equation in 18495 ms returned (error "Solver has unexpectedly terminated")
[2020-06-04 21:11:55] [INFO ] Initial state reduction rules for CTL removed 4 formulas.
[2020-06-04 21:11:55] [INFO ] Flatten gal took : 1742 ms
FORMULA ViralEpidemic-PT-S02D1C1A12-09 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ViralEpidemic-PT-S02D1C1A12-07 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ViralEpidemic-PT-S02D1C1A12-04 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA ViralEpidemic-PT-S02D1C1A12-01 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2020-06-04 21:11:56] [INFO ] Flatten gal took : 1083 ms
[2020-06-04 21:11:57] [INFO ] Export to MCC properties in file /home/mcc/execution/LTLFireability.sr.xml took 3 ms.
[2020-06-04 21:11:57] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml took 136 ms.
info: Time: 3600 - MCC
vrfy: Checking LTLFireability @ ViralEpidemic-PT-S02D1C1A12 @ 3570 seconds

FORMULA ViralEpidemic-PT-S02D1C1A12-11 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA ViralEpidemic-PT-S02D1C1A12-15 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA ViralEpidemic-PT-S02D1C1A12-13 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA ViralEpidemic-PT-S02D1C1A12-05 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA ViralEpidemic-PT-S02D1C1A12-10 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
TIME LIMIT: Killed by timeout after 3600 seconds
MemTotal: 16427332 kB
MemFree: 9183168 kB
After kill :
MemTotal: 16427332 kB
MemFree: 16078644 kB

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

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="ViralEpidemic-PT-S02D1C1A12"
export BK_EXAMINATION="LTLFireability"
export BK_TOOL="itslola"
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 itslola"
echo " Input is ViralEpidemic-PT-S02D1C1A12, examination is LTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r228-oct2-159033547700482"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/ViralEpidemic-PT-S02D1C1A12.tgz
mv ViralEpidemic-PT-S02D1C1A12 execution
cd execution
if [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "UpperBounds" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] || [ "LTLFireability" = "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 [ "LTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLFireability" != "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 "LTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLFireability.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 '' LTLFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "LTLFireability" = "ReachabilityDeadlock" ] || [ "LTLFireability" = "QuasiLiveness" ] || [ "LTLFireability" = "StableMarking" ] || [ "LTLFireability" = "Liveness" ] || [ "LTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLFireability"
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 ;