About the Execution of LoLA for ShieldIIPs-PT-001B
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
62.623 | 113.00 | 60.00 | 0.00 | 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 | normal |
Execution Chart
We display below the execution chart for this examination (boot time has been removed).
Trace from the execution
Formatting '/data/fkordon/mcc2021-input.r213-tall-162098199700171.qcow2', fmt=qcow2 size=4294967296 backing_file='/data/fkordon/mcc2021-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 lola
Input is ShieldIIPs-PT-001B, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r213-tall-162098199700171
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 376K
-rw-r--r-- 1 mcc users 13K May 5 16:58 CTLCardinality.txt
-rw-r--r-- 1 mcc users 134K May 10 09:44 CTLCardinality.xml
-rw-r--r-- 1 mcc users 7.9K May 5 16:58 CTLFireability.txt
-rw-r--r-- 1 mcc users 74K May 10 09:44 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 6 14:48 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.3K Mar 28 16:35 LTLCardinality.txt
-rw-r--r-- 1 mcc users 24K Mar 28 16:35 LTLCardinality.xml
-rw-r--r-- 1 mcc users 1.9K Mar 28 16:35 LTLFireability.txt
-rw-r--r-- 1 mcc users 16K Mar 28 16:35 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.0K Mar 27 11:50 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 15K Mar 27 11:50 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 2.9K Mar 25 17:38 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 20K Mar 25 17:38 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Mar 22 08:16 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Mar 22 08:16 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 5 16:52 equiv_col
-rw-r--r-- 1 mcc users 5 May 5 16:52 instance
-rw-r--r-- 1 mcc users 6 May 5 16:52 iscolored
-rw-r--r-- 1 mcc users 17K May 5 16:52 model.pnml
--------------------
content from stdout:
=== Data for post analysis generated by BenchKit (invocation template)
The expected result is a vector of positive values
NUM_VECTOR
here is the order used to build the result vector(from text file)
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-00
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-01
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-02
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-03
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-04
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-05
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-06
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-07
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-08
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-09
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-10
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-11
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-12
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-13
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-14
FORMULA_NAME ShieldIIPs-PT-001B-UpperBounds-15
=== Now, execution of the tool begins
BK_START 1621035749826
starting LoLA
BK_INPUT ShieldIIPs-PT-001B
BK_EXAMINATION: UpperBounds
bin directory: /home/mcc/BenchKit/bin
current directory: /home/mcc/execution
Upper Bounds
FORMULA ShieldIIPs-PT-001B-UpperBounds-00 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-09 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-01 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-05 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-06 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-07 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-12 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-13 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-11 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-15 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-14 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-04 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-03 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-10 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-02 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
FORMULA ShieldIIPs-PT-001B-UpperBounds-08 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
BK_STOP 1621035749939
--------------------
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/UpperBounds.xml
lola: Rule S: 0 transitions removed,0 places removed
lola: LAUNCH task # 50 (type EXCL) for 0 ShieldIIPs-PT-001B-UpperBounds-00
lola: time limit : 128 sec
lola: memory limit: 32 pages
lola: LAUNCH task # 48 (type FNDP) for 0 ShieldIIPs-PT-001B-UpperBounds-00
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 49 (type EQUN) for 0 ShieldIIPs-PT-001B-UpperBounds-00
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 52 (type FNDP) for 3 ShieldIIPs-PT-001B-UpperBounds-01
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 50 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-00
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: CANCELED task # 48 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-00 (obsolete)
lola: CANCELED task # 49 (type EQUN) for ShieldIIPs-PT-001B-UpperBounds-00 (obsolete)
lola: LAUNCH task # 68 (type EXCL) for 27 ShieldIIPs-PT-001B-UpperBounds-09
lola: time limit : 133 sec
lola: memory limit: 32 pages
lola: LAUNCH task # 57 (type FNDP) for 18 ShieldIIPs-PT-001B-UpperBounds-06
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 58 (type EQUN) for 18 ShieldIIPs-PT-001B-UpperBounds-06
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: REPORT NUM
sara: try reading problem file /home/mcc/execution/UpperBounds-49.sara.
lola: FINISHED task # 68 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-09
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
sara: place or transition ordering is non-deterministic
lola: REPORT NUM
lola: LAUNCH task # 56 (type EXCL) for 15 ShieldIIPs-PT-001B-UpperBounds-05
lola: time limit : 144 sec
lola: memory limit: 32 pages
lola: FINISHED task # 48 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-00
lola: tried executions : 1
lola: time used : 0.000000
lola: FINISHED task # 52 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-01
lola: tried executions : 1
lola: time used : 0.000000
sara: try reading problem file /home/mcc/execution/UpperBounds-58.sara.
lola: REPORT NUM
lola: Structural Bound: 1
lola: REPORT NUM
lola: LAUNCH task # 69 (type FNDP) for 33 ShieldIIPs-PT-001B-UpperBounds-11
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: FINISHED task # 56 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-05
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
sara: place or transition ordering is non-deterministic
lola: LAUNCH task # 80 (type EXCL) for 21 ShieldIIPs-PT-001B-UpperBounds-07
lola: time limit : 171 sec
lola: memory limit: 32 pages
lola: FINISHED task # 57 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-06
lola: fired transitions : 7
lola: tried executions : 1
lola: time used : 0.000000
lola: Structural Bound: 1
lola: CANCELED task # 58 (type EQUN) for ShieldIIPs-PT-001B-UpperBounds-06 (obsolete)
lola: REPORT NUM
lola: LAUNCH task # 81 (type FNDP) for 39 ShieldIIPs-PT-001B-UpperBounds-13
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 83 (type FNDP) for 24 ShieldIIPs-PT-001B-UpperBounds-08
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: FINISHED task # 80 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-07
lola: markings : 9
lola: fired transitions : 8
lola: time used : 0.000000
lola: memory pages used : 1
lola: LAUNCH task # 95 (type EXCL) for 36 ShieldIIPs-PT-001B-UpperBounds-12
lola: time limit : 200 sec
lola: memory limit: 32 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 95 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-12
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: REPORT NUM
lola: FINISHED task # 49 (type EQUN) for ShieldIIPs-PT-001B-UpperBounds-00
lola: time used : 0.000000
lola: LAUNCH task # 94 (type EXCL) for 45 ShieldIIPs-PT-001B-UpperBounds-15
lola: time limit : 225 sec
lola: memory limit: 32 pages
lola: REPORT NUM
lola: FINISHED task # 81 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-13
lola: tried executions : 1
lola: time used : 0.000000
lola: LAUNCH task # 72 (type FNDP) for 30 ShieldIIPs-PT-001B-UpperBounds-10
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: REPORT NUM
lola: FINISHED task # 69 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-11
lola: fired transitions : 7
lola: tried executions : 1
lola: time used : 0.000000
lola: Structural Bound: 1
lola: LAUNCH task # 60 (type FNDP) for 6 ShieldIIPs-PT-001B-UpperBounds-02
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: REPORT NUM
lola: FINISHED task # 94 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-15
lola: markings : 6
lola: fired transitions : 5
lola: time used : 0.000000
lola: memory pages used : 1
lola: REPORT NUM
lola: LAUNCH task # 92 (type EXCL) for 42 ShieldIIPs-PT-001B-UpperBounds-14
lola: time limit : 360 sec
lola: memory limit: 32 pages
lola: FINISHED task # 58 (type EQUN) for ShieldIIPs-PT-001B-UpperBounds-06
lola: time used : 0.000000
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 92 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-14
lola: markings : 6
lola: fired transitions : 5
lola: time used : 0.000000
lola: memory pages used : 1
lola: LAUNCH task # 75 (type EXCL) for 12 ShieldIIPs-PT-001B-UpperBounds-04
lola: time limit : 450 sec
lola: memory limit: 32 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 75 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-04
lola: markings : 7
lola: fired transitions : 6
lola: time used : 0.000000
lola: memory pages used : 1
lola: LAUNCH task # 65 (type EXCL) for 9 ShieldIIPs-PT-001B-UpperBounds-03
lola: time limit : 600 sec
lola: memory limit: 32 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 65 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-03
lola: markings : 9
lola: fired transitions : 8
lola: time used : 0.000000
lola: memory pages used : 1
lola: LAUNCH task # 62 (type EXCL) for 6 ShieldIIPs-PT-001B-UpperBounds-02
lola: time limit : 720 sec
lola: memory limit: 32 pages
lola: REPORT NUM
lola: FINISHED task # 72 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-10
lola: fired transitions : 5
lola: tried executions : 1
lola: time used : 0.000000
lola: LAUNCH task # 84 (type EQUN) for 24 ShieldIIPs-PT-001B-UpperBounds-08
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: REPORT NUM
lola: FINISHED task # 62 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-02
lola: markings : 12
lola: fired transitions : 11
lola: time used : 0.000000
lola: memory pages used : 1
lola: CANCELED task # 60 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-02 (obsolete)
lola: REPORT NUM
lola: LAUNCH task # 85 (type EXCL) for 24 ShieldIIPs-PT-001B-UpperBounds-08
lola: time limit : 1800 sec
lola: memory limit: 32 pages
lola: FINISHED task # 83 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-08
lola: tried executions : 1
lola: time used : 0.000000
lola: FINISHED task # 60 (type FNDP) for ShieldIIPs-PT-001B-UpperBounds-02
lola: fired transitions : 10
lola: tried executions : 1
lola: time used : 0.000000
lola: CANCELED task # 84 (type EQUN) for ShieldIIPs-PT-001B-UpperBounds-08 (obsolete)
lola: CANCELED task # 85 (type EXCL) for ShieldIIPs-PT-001B-UpperBounds-08 (obsolete)
lola: Portfolio finished: no open formulas
lola: Structural Bound: 1
FINAL RESULTS
FINISHED FORMULA: CATEGORY VALUE PRODUCED BY
ShieldIIPs-PT-001B-UpperBounds-00: BOUND 1 state space
ShieldIIPs-PT-001B-UpperBounds-01: BOUND 1 findpath
ShieldIIPs-PT-001B-UpperBounds-02: BOUND 1 state space
ShieldIIPs-PT-001B-UpperBounds-03: BOUND 1 state space
ShieldIIPs-PT-001B-UpperBounds-04: BOUND 1 state space
ShieldIIPs-PT-001B-UpperBounds-05: BOUND 1 state space
ShieldIIPs-PT-001B-UpperBounds-06: BOUND 1 findpath
ShieldIIPs-PT-001B-UpperBounds-07: BOUND 1 state space
ShieldIIPs-PT-001B-UpperBounds-08: BOUND 1 findpath
ShieldIIPs-PT-001B-UpperBounds-09: BOUND 1 state space
ShieldIIPs-PT-001B-UpperBounds-10: BOUND 1 findpath
ShieldIIPs-PT-001B-UpperBounds-11: BOUND 1 findpath
ShieldIIPs-PT-001B-UpperBounds-12: BOUND 1 state space
ShieldIIPs-PT-001B-UpperBounds-13: BOUND 1 findpath
ShieldIIPs-PT-001B-UpperBounds-14: BOUND 1 state space
ShieldIIPs-PT-001B-UpperBounds-15: BOUND 1 state space
Time elapsed: 0 secs. Pages in use: 1
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="ShieldIIPs-PT-001B"
export BK_EXAMINATION="UpperBounds"
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 2-4028"
echo " Executing tool lola"
echo " Input is ShieldIIPs-PT-001B, examination is UpperBounds"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r213-tall-162098199700171"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/ShieldIIPs-PT-001B.tgz
mv ShieldIIPs-PT-001B execution
cd execution
if [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "UpperBounds" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] || [ "UpperBounds" = "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 [ "UpperBounds" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "UpperBounds" != "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 "UpperBounds.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property UpperBounds.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "UpperBounds.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 '
echo "FORMULA_NAME $x"
done
elif [ "UpperBounds" = "ReachabilityDeadlock" ] || [ "UpperBounds" = "QuasiLiveness" ] || [ "UpperBounds" = "StableMarking" ] || [ "UpperBounds" = "Liveness" ] || [ "UpperBounds" = "OneSafe" ] ; then
echo "FORMULA_NAME UpperBounds"
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 ;