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.r422-tajo-167905976000484.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 lola
Input is SieveSingleMsgMbox-PT-d2m64, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r422-tajo-167905976000484
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 1.5M
-rw-r--r-- 1 mcc users 6.0K Feb 26 10:30 CTLCardinality.txt
-rw-r--r-- 1 mcc users 57K Feb 26 10:30 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.0K Feb 26 10:29 CTLFireability.txt
-rw-r--r-- 1 mcc users 54K Feb 26 10:29 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.8K Feb 25 17:06 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Feb 25 17:06 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.3K Feb 25 17:06 LTLFireability.txt
-rw-r--r-- 1 mcc users 16K Feb 25 17:06 LTLFireability.xml
-rw-r--r-- 1 mcc users 12K Feb 26 10:32 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 116K Feb 26 10:32 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 6.9K Feb 26 10:32 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 52K Feb 26 10:32 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Feb 25 17:06 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Feb 25 17:06 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 1.1M Mar 5 18:23 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 SieveSingleMsgMbox-PT-d2m64-LTLFireability-00
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-01
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-02
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-03
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-04
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-05
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-06
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-07
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-08
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-09
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-10
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-11
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-12
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-13
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-14
FORMULA_NAME SieveSingleMsgMbox-PT-d2m64-LTLFireability-15

=== Now, execution of the tool begins

BK_START 1679225974476

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=lola
BK_EXAMINATION=LTLFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=SieveSingleMsgMbox-PT-d2m64
Not applying reductions.
Model is PT
LTLFireability PT
starting LoLA
BK_INPUT SieveSingleMsgMbox-PT-d2m64
BK_EXAMINATION: LTLFireability
bin directory: /home/mcc/BenchKit/bin//../lola/bin/
current directory: /home/mcc/execution
LTLFireability

FORMULA SieveSingleMsgMbox-PT-d2m64-LTLFireability-06 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SieveSingleMsgMbox-PT-d2m64-LTLFireability-09 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SieveSingleMsgMbox-PT-d2m64-LTLFireability-00 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SieveSingleMsgMbox-PT-d2m64-LTLFireability-11 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SieveSingleMsgMbox-PT-d2m64-LTLFireability-14 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

BK_STOP 1679225976382

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

lola: MEM LIMIT 32
lola: MEM LIMIT 5
lola: NET
lola: input: PNML file (--pnmlnet)
lola: reading net from /home/mcc/execution/model.pnml
lola: reading pnml
lola: PNML file contains place/transition net
lola: finished parsing
lola: closed net file /home/mcc/execution/model.pnml
lola: Reading formula.
lola: Using XML format (--xmlformula)
lola: reading XML formula
lola: reading formula from /home/mcc/execution/LTLFireability.xml
lola: rewrite Frontend/Parser/formula_rewrite.k:352
lola: rewrite Frontend/Parser/formula_rewrite.k:352
lola: rewrite Frontend/Parser/formula_rewrite.k:331
lola: rewrite Frontend/Parser/formula_rewrite.k:317
lola: rewrite Frontend/Parser/formula_rewrite.k:337
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:334
lola: rewrite Frontend/Parser/formula_rewrite.k:328
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:349
lola: rewrite Frontend/Parser/formula_rewrite.k:544
lola: rewrite Frontend/Parser/formula_rewrite.k:352
lola: rewrite Frontend/Parser/formula_rewrite.k:376
lola: RELEASE
lola: RELEASE
lola: rewrite Frontend/Parser/formula_rewrite.k:317
lola: rewrite Frontend/Parser/formula_rewrite.k:328
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:334
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:346
lola: rewrite Frontend/Parser/formula_rewrite.k:328
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:433
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:421
lola: rewrite Frontend/Parser/formula_rewrite.k:96
lola: rewrite Frontend/Parser/formula_rewrite.k:331
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:436
lola: rewrite Frontend/Parser/formula_rewrite.k:373
lola: rewrite Frontend/Parser/formula_rewrite.k:117
lola: rewrite Frontend/Parser/formula_rewrite.k:281
lola: rewrite Frontend/Parser/formula_rewrite.k:153
lola: rewrite Frontend/Parser/formula_rewrite.k:150
lola: rewrite Frontend/Parser/formula_rewrite.k:430
lola: rewrite Frontend/Parser/formula_rewrite.k:334
lola: rewrite Frontend/Parser/formula_rewrite.k:334
lola: rewrite Frontend/Parser/formula_rewrite.k:331
lola: rewrite Frontend/Parser/formula_rewrite.k:314
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:317
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:314
lola: rewrite Frontend/Parser/formula_rewrite.k:328
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:331
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:352
lola: rewrite Frontend/Parser/formula_rewrite.k:352
lola: rewrite Frontend/Parser/formula_rewrite.k:352
lola: rewrite Frontend/Parser/formula_rewrite.k:352
lola: rewrite Frontend/Parser/formula_rewrite.k:349
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:379
lola: rewrite Frontend/Parser/formula_rewrite.k:379
lola: rewrite Frontend/Parser/formula_rewrite.k:379
lola: rewrite Frontend/Parser/formula_rewrite.k:379
lola: rewrite Frontend/Parser/formula_rewrite.k:379
lola: rewrite Frontend/Parser/formula_rewrite.k:328
lola: rewrite Frontend/Parser/formula_rewrite.k:317
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:337
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:346
lola: rewrite Frontend/Parser/formula_rewrite.k:430
lola: rewrite Frontend/Parser/formula_rewrite.k:346
lola: rewrite Frontend/Parser/formula_rewrite.k:317
lola: rewrite Frontend/Parser/formula_rewrite.k:331
lola: rewrite Frontend/Parser/formula_rewrite.k:314
lola: rewrite Frontend/Parser/formula_rewrite.k:299
lola: rewrite Frontend/Parser/formula_rewrite.k:340
lola: rewrite Frontend/Parser/formula_rewrite.k:299
lola: rewrite Frontend/Parser/formula_rewrite.k:299
lola: rewrite Frontend/Parser/formula_rewrite.k:314
lola: rewrite Frontend/Parser/formula_rewrite.k:328
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:331
lola: rewrite Frontend/Parser/formula_rewrite.k:314
lola: rewrite Frontend/Parser/formula_rewrite.k:299
lola: rewrite Frontend/Parser/formula_rewrite.k:340
lola: rewrite Frontend/Parser/formula_rewrite.k:299
lola: rewrite Frontend/Parser/formula_rewrite.k:299
lola: rewrite Frontend/Parser/formula_rewrite.k:550
lola: rewrite Frontend/Parser/formula_rewrite.k:96
lola: rewrite Frontend/Parser/formula_rewrite.k:162
lola: rewrite Frontend/Parser/formula_rewrite.k:144
lola: rewrite Frontend/Parser/formula_rewrite.k:121
lola: rewrite Frontend/Parser/formula_rewrite.k:346
lola: rewrite Frontend/Parser/formula_rewrite.k:535
lola: rewrite Frontend/Parser/formula_rewrite.k:150
lola: rewrite Frontend/Parser/formula_rewrite.k:352
lola: rewrite Frontend/Parser/formula_rewrite.k:352
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:379
lola: rewrite Frontend/Parser/formula_rewrite.k:379
lola: rewrite Frontend/Parser/formula_rewrite.k:427
lola: rewrite Frontend/Parser/formula_rewrite.k:535
lola: rewrite Frontend/Parser/formula_rewrite.k:355
lola: rewrite Frontend/Parser/formula_rewrite.k:379
lola: rewrite Frontend/Parser/formula_rewrite.k:317
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:334
lola: rewrite Frontend/Parser/formula_rewrite.k:328
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:331
lola: rewrite Frontend/Parser/formula_rewrite.k:296
lola: rewrite Frontend/Parser/formula_rewrite.k:253
lola: Created skeleton in 0.000000 secs.
lola: RELEASE
lola: Created skeleton in 0.000000 secs.
lola: Created skeleton in 0.000000 secs.
lola: Created skeleton in 0.000000 secs.
lola: Rule S: 0 transitions removed,1984 places removed
lola: Created skeleton in 0.000000 secs.
lola: NOTDEADLOCKFREE
lola: LAUNCH INITIAL
lola: LAUNCH task # 23 (type CNST) for 22 SieveSingleMsgMbox-PT-d2m64-LTLFireability-06
lola: time limit : 0 sec
lola: memory limit: 0 pages
lola: LAUNCH task # 64 (type SKEL/SRCH) for 3 SieveSingleMsgMbox-PT-d2m64-LTLFireability-01
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: NOTDEADLOCKFREE
lola: FINISHED task # 23 (type CNST) for SieveSingleMsgMbox-PT-d2m64-LTLFireability-06
lola: result : true
lola: Created skeleton in 0.000000 secs.
lola: NOTDEADLOCKFREE
lola: LAUNCH task # 65 (type SKEL/SRCH) for 25 SieveSingleMsgMbox-PT-d2m64-LTLFireability-07
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: Created skeleton in 0.000000 secs.
lola: Created skeleton in 0.000000 secs.
lola: LAUNCH INITIAL
lola: LAUNCH task # 38 (type CNST) for 35 SieveSingleMsgMbox-PT-d2m64-LTLFireability-09
lola: time limit : 0 sec
lola: memory limit: 0 pages
lola: Created skeleton in 0.000000 secs.
lola: Created skeleton in 0.000000 secs.
lola: FINISHED task # 38 (type CNST) for SieveSingleMsgMbox-PT-d2m64-LTLFireability-09
lola: result : false
lola: Created skeleton in 0.000000 secs.
lola: planning for (null) stopped (result already fixed).
lola: NOTDEADLOCKFREE
lola: Created skeleton in 1.000000 secs.
lola: Created skeleton in 0.000000 secs.
lola: LAUNCH task # 1 (type EXCL) for 0 SieveSingleMsgMbox-PT-d2m64-LTLFireability-00
lola: time limit : 156 sec
lola: memory limit: 32 pages
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: FINISHED task # 1 (type EXCL) for SieveSingleMsgMbox-PT-d2m64-LTLFireability-00
lola: result : false
lola: markings : 8
lola: fired transitions : 8
lola: time used : 0.000000
lola: memory pages used : 1
lola: LAUNCH task # 69 (type EXCL) for 45 SieveSingleMsgMbox-PT-d2m64-LTLFireability-11
lola: time limit : 163 sec
lola: memory limit: 32 pages
lola: LAUNCH task # 67 (type FNDP) for 45 SieveSingleMsgMbox-PT-d2m64-LTLFireability-11
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: Created skeleton in 0.000000 secs.
lola: rewrite Frontend/Parser/formula_rewrite.k:493
lola: Created skeleton in 0.000000 secs.
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: FINISHED task # 67 (type FNDP) for SieveSingleMsgMbox-PT-d2m64-LTLFireability-11
lola: result : true
lola: tried executions : 1
lola: time used : 0.000000
lola: memory pages used : 0
lola: FINISHED task # 69 (type EXCL) for SieveSingleMsgMbox-PT-d2m64-LTLFireability-11
lola: result : true
lola: time used : 0.000000
lola: memory pages used : 1
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: rewrite Frontend/Parser/formula_rewrite.k:721
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: LAUNCH task # 59 (type EXCL) for 58 SieveSingleMsgMbox-PT-d2m64-LTLFireability-14
lola: time limit : 211 sec
lola: memory limit: 32 pages
lola: LAUNCH task # 72 (type FNDP) for 61 SieveSingleMsgMbox-PT-d2m64-LTLFireability-15
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: rewrite Frontend/Parser/formula_rewrite.k:749
lola: rewrite Frontend/Parser/formula_rewrite.k:787
lola: FINISHED task # 59 (type EXCL) for SieveSingleMsgMbox-PT-d2m64-LTLFireability-14
lola: result : true
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: LAUNCH task # 33 (type EXCL) for 28 SieveSingleMsgMbox-PT-d2m64-LTLFireability-08
lola: time limit : 224 sec
lola: memory limit: 32 pages
lola: Created skeleton in 0.000000 secs.
lola: FINISHED task # 33 (type EXCL) for SieveSingleMsgMbox-PT-d2m64-LTLFireability-08
lola: result : true
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: LAUNCH task # 31 (type EXCL) for 28 SieveSingleMsgMbox-PT-d2m64-LTLFireability-08
lola: time limit : 239 sec
lola: memory limit: 32 pages
lola: Created skeleton in 0.000000 secs.

FINAL RESULTS
FINISHED FORMULA: CATEGORY VALUE PRODUCED BY


Time elapsed: 2 secs. Pages in use: 3

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="SieveSingleMsgMbox-PT-d2m64"
export BK_EXAMINATION="LTLFireability"
export BK_TOOL="lola"
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 lola"
echo " Input is SieveSingleMsgMbox-PT-d2m64, 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 r422-tajo-167905976000484"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/SieveSingleMsgMbox-PT-d2m64.tgz
mv SieveSingleMsgMbox-PT-d2m64 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 ;