fond
Model Checking Contest 2024
14th edition, Geneva, Switzerland, June 25, 2024
Execution of r093-tall-171624190000044
Last Updated
July 7, 2024

About the Execution of LoLA for CloudOpsManagement-PT-00080by00040

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
81.855 514.00 169.00 0.00 FFFFFFTFFFFTFFFF normal

Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2024-input.r093-tall-171624190000044.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2024-input.qcow2 backing_fmt=qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5568
Executing tool lola
Input is CloudOpsManagement-PT-00080by00040, examination is LTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r093-tall-171624190000044
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 456K
-rw-r--r-- 1 mcc users 7.6K May 14 13:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 68K May 14 13:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.6K May 14 13:22 CTLFireability.txt
-rw-r--r-- 1 mcc users 55K May 14 13:22 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:42 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K May 18 16:42 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 4.4K May 19 07:08 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K May 19 15:39 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.8K Apr 22 14:34 LTLFireability.txt
-rw-r--r-- 1 mcc users 20K Apr 22 14:34 LTLFireability.xml
-rw-r--r-- 1 mcc users 9.7K Apr 11 16:03 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 81K Apr 11 16:03 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 12K Apr 11 16:02 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 93K Apr 11 16:02 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.0K Apr 22 14:34 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.0K Apr 22 14:34 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 18 16:42 equiv_col
-rw-r--r-- 1 mcc users 13 May 18 16:42 instance
-rw-r--r-- 1 mcc users 6 May 18 16:42 iscolored
-rw-r--r-- 1 mcc users 16K May 18 16:42 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 CloudOpsManagement-PT-00080by00040-LTLFireability-00
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-01
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-02
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-03
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-04
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-05
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-06
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-07
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-08
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-09
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-10
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-11
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-12
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-13
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-14
FORMULA_NAME CloudOpsManagement-PT-00080by00040-LTLFireability-15

=== Now, execution of the tool begins

BK_START 1717007049772

FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-09 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-01 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-08 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-05 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-04 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-14 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-13 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-10 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-07 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-03 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-02 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-11 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-15 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-12 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-00 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA CloudOpsManagement-PT-00080by00040-LTLFireability-06 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
[lola] FINAL RESULTS
[lola]  FINISHED FORMULA: CATEGORY VALUE PRODUCED BY
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-00: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-01: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-02: CONJ false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-03: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-04: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-05: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-06: LTL true LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-07: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-08: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-09: CONJ false preprocessing
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-10: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-11: CONJ true CONJ
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-12: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-13: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-14: LTL false LTL model checker
[lola] CloudOpsManagement-PT-00080by00040-LTLFireability-15: LTL false LTL model checker
[lola]
[lola] Time elapsed: 1 secs. Pages in use: 1

BK_STOP 1717007050286

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

[lola][I] LoLA will run for 3600 seconds at most (--timelimit)
[lola][W] unknown unit in memory specification: using default
[lola][I] MEM LIMIT 5
[lola][I] NET
[lola][I] reading net from model.pnml
[lola][I] input: PNML file (--pnmlnet)
[lola][I] reading pnml
[lola][I] PNML file contains place/transition net
[lola][I] closed net file model.pnml
[lola][I] finished parsing
[lola][I] Reading formula.
[lola][I] Using XML format (--xmlformula)
[lola][I] reading XML formula
[lola][I] reading formula from LTLFireability.xml
[lola][I] Rule S: 0 transitions removed,0 places removed
[lola][I] LAUNCH task # 34 (type CNST) for 31 CloudOpsManagement-PT-00080by00040-LTLFireability-09
[lola][I] time limit : 0 sec
[lola][I] memory limit: 0 pages
[lola][I] FINISHED task # 34 (type CNST) for CloudOpsManagement-PT-00080by00040-LTLFireability-09
[lola][I] result : false
[lola][I] LAUNCH task # 4 (type EXCL) for 3 CloudOpsManagement-PT-00080by00040-LTLFireability-01
[lola][I] time limit : 211 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 4 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-01
[lola][I] result : false
[lola][I] markings : 5
[lola][I] fired transitions : 6
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 29 (type EXCL) for 28 CloudOpsManagement-PT-00080by00040-LTLFireability-08
[lola][I] time limit : 224 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 29 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-08
[lola][I] result : false
[lola][I] markings : 4
[lola][I] fired transitions : 4
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 20 (type EXCL) for 19 CloudOpsManagement-PT-00080by00040-LTLFireability-05
[lola][I] time limit : 239 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 20 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-05
[lola][I] result : false
[lola][I] markings : 5
[lola][I] fired transitions : 5
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 17 (type EXCL) for 16 CloudOpsManagement-PT-00080by00040-LTLFireability-04
[lola][I] time limit : 257 sec
[lola][I] memory limit: 2000 pages
[*** LOG ERROR #0001 ***] [2024-05-29 18:24:10] [status_logger] string pointer is null
[lola][I] LAUNCH task # 64 (type EQUN) for 41 CloudOpsManagement-PT-00080by00040-LTLFireability-11
[lola][I] time limit : 32000000 sec
[lola][I] memory limit: 5 pages
[lola][I] FINISHED task # 64 (type EQUN) for CloudOpsManagement-PT-00080by00040-LTLFireability-11
[lola][I] result : unknown
[lola][I] FINISHED task # 17 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-04
[lola][I] result : false
[lola][I] markings : 28760
[lola][I] fired transitions : 44377
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 55 (type EXCL) for 54 CloudOpsManagement-PT-00080by00040-LTLFireability-14
[lola][I] time limit : 276 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 55 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-14
[lola][I] result : false
[lola][I] markings : 5
[lola][I] fired transitions : 5
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 52 (type EXCL) for 51 CloudOpsManagement-PT-00080by00040-LTLFireability-13
[lola][I] time limit : 299 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 52 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-13
[lola][I] result : false
[lola][I] markings : 6
[lola][I] fired transitions : 7
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 44 (type EXCL) for 41 CloudOpsManagement-PT-00080by00040-LTLFireability-11
[lola][I] time limit : 327 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 44 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-11
[lola][I] result : true
[lola][I] markings : 4
[lola][I] fired transitions : 3
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 39 (type EXCL) for 38 CloudOpsManagement-PT-00080by00040-LTLFireability-10
[lola][I] time limit : 359 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 39 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-10
[lola][I] result : false
[lola][I] markings : 14
[lola][I] fired transitions : 14
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 26 (type EXCL) for 25 CloudOpsManagement-PT-00080by00040-LTLFireability-07
[lola][I] time limit : 399 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 26 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-07
[lola][I] result : false
[lola][I] markings : 4
[lola][I] fired transitions : 4
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 14 (type EXCL) for 13 CloudOpsManagement-PT-00080by00040-LTLFireability-03
[lola][I] time limit : 449 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 14 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-03
[lola][I] result : false
[lola][I] markings : 28757
[lola][I] fired transitions : 44371
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 11 (type EXCL) for 6 CloudOpsManagement-PT-00080by00040-LTLFireability-02
[lola][I] time limit : 514 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 11 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-02
[lola][I] result : false
[lola][I] markings : 4
[lola][I] fired transitions : 4
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 61 (type EXCL) for 41 CloudOpsManagement-PT-00080by00040-LTLFireability-11
[lola][I] time limit : 719 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 61 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-11
[lola][I] result : false
[lola][I] markings : 1
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 58 (type EXCL) for 57 CloudOpsManagement-PT-00080by00040-LTLFireability-15
[lola][I] time limit : 899 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 58 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-15
[lola][I] result : false
[lola][I] markings : 243
[lola][I] fired transitions : 243
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 49 (type EXCL) for 48 CloudOpsManagement-PT-00080by00040-LTLFireability-12
[lola][I] time limit : 1199 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 49 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-12
[lola][I] result : false
[lola][I] markings : 161
[lola][I] fired transitions : 161
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 1 (type EXCL) for 0 CloudOpsManagement-PT-00080by00040-LTLFireability-00
[lola][I] time limit : 1799 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 1 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-00
[lola][I] result : false
[lola][I] markings : 4
[lola][I] fired transitions : 5
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] LAUNCH task # 23 (type EXCL) for 22 CloudOpsManagement-PT-00080by00040-LTLFireability-06
[lola][I] time limit : 3599 sec
[lola][I] memory limit: 2000 pages
[lola][I] FINISHED task # 23 (type EXCL) for CloudOpsManagement-PT-00080by00040-LTLFireability-06
[lola][I] result : true
[lola][I] markings : 1
[lola][I] time used : 0
[lola][I] memory pages used : 1
[lola][I] Portfolio finished: no open formulas

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="CloudOpsManagement-PT-00080by00040"
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 2-5568"
echo " Executing tool lola"
echo " Input is CloudOpsManagement-PT-00080by00040, 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 r093-tall-171624190000044"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/CloudOpsManagement-PT-00080by00040.tgz
mv CloudOpsManagement-PT-00080by00040 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 ;