Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2023-input.r454-smll-167912646000165.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2023-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-5348
Executing tool lola
Input is SmartHome-PT-02, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r454-smll-167912646000165
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 536K
-rw-r--r-- 1 mcc users 5.8K Feb 26 05:50 CTLCardinality.txt
-rw-r--r-- 1 mcc users 62K Feb 26 05:50 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.3K Feb 26 05:46 CTLFireability.txt
-rw-r--r-- 1 mcc users 63K Feb 26 05:46 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K Jan 29 11:41 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 3.5K Feb 25 17:08 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Feb 25 17:08 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K Feb 25 17:08 LTLFireability.txt
-rw-r--r-- 1 mcc users 15K Feb 25 17:08 LTLFireability.xml
-rw-r--r-- 1 mcc users 14K Feb 26 05:53 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 164K Feb 26 05:53 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 9.9K Feb 26 05:52 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 91K Feb 26 05:52 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 17:08 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Feb 25 17:08 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 equiv_col
-rw-r--r-- 1 mcc users 3 Mar 5 18:23 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:23 iscolored
-rw-r--r-- 1 mcc users 27K 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 positive values
NUM_VECTOR

here is the order used to build the result vector(from text file)
FORMULA_NAME SmartHome-PT-02-UpperBounds-00
FORMULA_NAME SmartHome-PT-02-UpperBounds-01
FORMULA_NAME SmartHome-PT-02-UpperBounds-02
FORMULA_NAME SmartHome-PT-02-UpperBounds-03
FORMULA_NAME SmartHome-PT-02-UpperBounds-04
FORMULA_NAME SmartHome-PT-02-UpperBounds-05
FORMULA_NAME SmartHome-PT-02-UpperBounds-06
FORMULA_NAME SmartHome-PT-02-UpperBounds-07
FORMULA_NAME SmartHome-PT-02-UpperBounds-08
FORMULA_NAME SmartHome-PT-02-UpperBounds-09
FORMULA_NAME SmartHome-PT-02-UpperBounds-10
FORMULA_NAME SmartHome-PT-02-UpperBounds-11
FORMULA_NAME SmartHome-PT-02-UpperBounds-12
FORMULA_NAME SmartHome-PT-02-UpperBounds-13
FORMULA_NAME SmartHome-PT-02-UpperBounds-14
FORMULA_NAME SmartHome-PT-02-UpperBounds-15

=== Now, execution of the tool begins

BK_START 1679222349624

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=UpperBounds
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=SmartHome-PT-02
Not applying reductions.
Model is PT
UpperBounds PT
starting LoLA
BK_INPUT SmartHome-PT-02
BK_EXAMINATION: UpperBounds
bin directory: /home/mcc/BenchKit/bin//../lola/bin/
current directory: /home/mcc/execution
Upper Bounds

FORMULA SmartHome-PT-02-UpperBounds-04 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-03 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-01 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-11 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-00 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-08 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-05 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-07 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-06 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-13 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-10 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-09 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-14 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-02 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-15 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA SmartHome-PT-02-UpperBounds-12 1 TECHNIQUES SEQUENTIAL_PROCESSING TOPOLOGICAL EXPLICIT STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

BK_STOP 1679222349820

--------------------
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 # 51 (type EXCL) for 12 SmartHome-PT-02-UpperBounds-04
lola: time limit : 128 sec
lola: memory limit: 32 pages
lola: LAUNCH task # 48 (type FNDP) for 12 SmartHome-PT-02-UpperBounds-04
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 50 (type EQUN) for 12 SmartHome-PT-02-UpperBounds-04
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 49 (type FNDP) for 9 SmartHome-PT-02-UpperBounds-03
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 51 (type EXCL) for SmartHome-PT-02-UpperBounds-04
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: CANCELED task # 48 (type FNDP) for SmartHome-PT-02-UpperBounds-04 (obsolete)
lola: CANCELED task # 50 (type EQUN) for SmartHome-PT-02-UpperBounds-04 (obsolete)
lola: REPORT NUM
lola: REPORT NUM
lola: LAUNCH task # 62 (type EXCL) for 3 SmartHome-PT-02-UpperBounds-01
lola: time limit : 138 sec
lola: memory limit: 32 pages
lola: LAUNCH task # 54 (type FNDP) for 0 SmartHome-PT-02-UpperBounds-00
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 55 (type EQUN) for 0 SmartHome-PT-02-UpperBounds-00
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: FINISHED task # 49 (type FNDP) for SmartHome-PT-02-UpperBounds-03
lola: tried executions : 1
lola: time used : 0.000000
lola: FINISHED task # 48 (type FNDP) for SmartHome-PT-02-UpperBounds-04
lola: tried executions : 1
lola: time used : 0.000000
lola: Structural Bound: 1
lola: REPORT NUM
lola: LAUNCH task # 56 (type FNDP) for 15 SmartHome-PT-02-UpperBounds-05
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: FINISHED task # 62 (type EXCL) for SmartHome-PT-02-UpperBounds-01
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: LAUNCH task # 78 (type EXCL) for 33 SmartHome-PT-02-UpperBounds-11
lola: time limit : 163 sec
lola: memory limit: 32 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 78 (type EXCL) for SmartHome-PT-02-UpperBounds-11
lola: sara: try reading problem file /home/mcc/execution/UpperBounds-55.sara.
markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: REPORT NUM
sara: try reading problem file /home/mcc/execution/UpperBounds-50.sara.
lola: LAUNCH task # 71 (type EXCL) for 24 SmartHome-PT-02-UpperBounds-08
lola: time limit : 163 sec
lola: memory limit: 32 pages
lola: FINISHED task # 54 (type FNDP) for SmartHome-PT-02-UpperBounds-00
lola: tried executions : 1
lola: time used : 0.000000
lola: CANCELED task # 55 (type EQUN) for SmartHome-PT-02-UpperBounds-00 (obsolete)
lola: LAUNCH task # 66 (type FNDP) for 39 SmartHome-PT-02-UpperBounds-13
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 67 (type EQUN) for 39 SmartHome-PT-02-UpperBounds-13
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 71 (type EXCL) for SmartHome-PT-02-UpperBounds-08
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
sara: place or transition ordering is non-deterministic
lola: REPORT NUM


lola: LAUNCH task # 92 (type EXCL) for 21 SmartHome-PT-02-UpperBounds-07
lola: time limit : 189 sec
lola: memory limit: 32 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 56 (type FNDP) for SmartHome-PT-02-UpperBounds-05
lola: tried executions : 1
lola: time used : 0.000000
lola: LAUNCH task # 72 (type FNDP) for 6 SmartHome-PT-02-UpperBounds-02
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: sara: try reading problem file /home/mcc/execution/UpperBounds-67.sara.
FINISHED task # 92 (type EXCL) for SmartHome-PT-02-UpperBounds-07
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1

lola: LAUNCH task # 90 (type EXCL) for 18 SmartHome-PT-02-UpperBounds-06
lola: time limit : 240 sec
lola: memory limit: 32 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 90 (type EXCL) for SmartHome-PT-02-UpperBounds-06
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: REPORT NUM
lola: LAUNCH task # 65 (type EXCL) for 30 SmartHome-PT-02-UpperBounds-10
lola: time limit : 276 sec
lola: memory limit: 32 pages
lola: FINISHED task # 66 (type FNDP) for SmartHome-PT-02-UpperBounds-13
lola: tried executions : 1
lola: time used : 0.000000
lola: CANCELED task # 67 (type EQUN) for SmartHome-PT-02-UpperBounds-13 (obsolete)
lola: LAUNCH task # 79 (type FNDP) for 42 SmartHome-PT-02-UpperBounds-14
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 80 (type EQUN) for 42 SmartHome-PT-02-UpperBounds-14
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 65 (type EXCL) for SmartHome-PT-02-UpperBounds-10
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: REPORT NUM
lola: REPORT NUM
lola: LAUNCH task # 95 (type EXCL) for 27 SmartHome-PT-02-UpperBounds-09
lola: time limit : 400 sec
lola: memory limit: 32 pages
lola: FINISHED task # 50 (type EQUN) for SmartHome-PT-02-UpperBounds-04
lola: time used : 0.000000
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 95 (type EXCL) for SmartHome-PT-02-UpperBounds-09
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: LAUNCH task # 87 (type EXCL) for 45 SmartHome-PT-02-UpperBounds-15
lola: time limit : 514 sec
lola: memory limit: 32 pages
lola: FINISHED task # 55 (type EQUN) for SmartHome-PT-02-UpperBounds-00
lola: time used : 0.000000
lola: REPORT NUM
lola: REPORT NUM
sara: try reading problem file /home/mcc/execution/UpperBounds-80.sara.
lola: REPORT NUM
lola: FINISHED task # 79 (type FNDP) for SmartHome-PT-02-UpperBounds-14
lola: tried executions : 1
lola:
time used : 0.000000
lola: CANCELED task # 80 (type EQUN) for SmartHome-PT-02-UpperBounds-14 (obsolete)
lola: LAUNCH task # 82 (type FNDP) for 36 SmartHome-PT-02-UpperBounds-12
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: LAUNCH task # 83 (type EQUN) for 36 SmartHome-PT-02-UpperBounds-12
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: FINISHED task # 72 (type FNDP) for SmartHome-PT-02-UpperBounds-02
lola: tried executions : 1
lola: time used : 0.000000
lola: REPORT NUM
lola: LAUNCH task # 85 (type FNDP) for 45 SmartHome-PT-02-UpperBounds-15
lola: time limit : 32000000 sec
lola: memory limit: 5 pages
lola: Structural Bound: 1
lola: REPORT NUM
lola: FINISHED task # 87 (type EXCL) for SmartHome-PT-02-UpperBounds-15
lola: markings : 2
lola: fired transitions : 1
lola: time used : 0.000000
lola: memory pages used : 1
lola: CANCELED task # 85 (type FNDP) for SmartHome-PT-02-UpperBounds-15 (obsolete)
lola: LAUNCH task # 84 (type EXCL) for 36 SmartHome-PT-02-UpperBounds-12
lola: time limit : 1800 sec
lola: memory limit: 32 pages
lola: FINISHED task # 82 (type FNDP) for SmartHome-PT-02-UpperBounds-12
lola: tried executions : 1
lola: time used : 0.000000
lola: FINISHED task # 67 (type EQUN) for SmartHome-PT-02-UpperBounds-13
lola: time used : 0.000000
lola: CANCELED task # 83 (type EQUN) for SmartHome-PT-02-UpperBounds-12 (obsolete)
lola: CANCELED task # 84 (type EXCL) for SmartHome-PT-02-UpperBounds-12 (obsolete)
lola: Portfolio finished: no open formulas

FINAL RESULTS
FINISHED FORMULA: CATEGORY VALUE PRODUCED BY
SmartHome-PT-02-UpperBounds-00: BOUND 1 findpath
SmartHome-PT-02-UpperBounds-01: BOUND 1 state space
SmartHome-PT-02-UpperBounds-02: BOUND 1 findpath
SmartHome-PT-02-UpperBounds-03: BOUND 1 findpath
SmartHome-PT-02-UpperBounds-04: BOUND 1 state space
SmartHome-PT-02-UpperBounds-05: BOUND 1 findpath
SmartHome-PT-02-UpperBounds-06: BOUND 1 state space
SmartHome-PT-02-UpperBounds-07: BOUND 1 state space
SmartHome-PT-02-UpperBounds-08: BOUND 1 state space
SmartHome-PT-02-UpperBounds-09: BOUND 1 state space
SmartHome-PT-02-UpperBounds-10: BOUND 1 state space
SmartHome-PT-02-UpperBounds-11: BOUND 1 state space
SmartHome-PT-02-UpperBounds-12: BOUND 1 findpath
SmartHome-PT-02-UpperBounds-13: BOUND 1 findpath
SmartHome-PT-02-UpperBounds-14: BOUND 1 findpath
SmartHome-PT-02-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="SmartHome-PT-02"
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 2-5348"
echo " Executing tool lola"
echo " Input is SmartHome-PT-02, 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 r454-smll-167912646000165"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/SmartHome-PT-02.tgz
mv SmartHome-PT-02 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 '' UpperBounds.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
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 ;