Execution Chart

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

Trace from the execution

Formatting '/local/x2003239/mcc2019-input.r160-csrt-155286431700155.qcow2', fmt=qcow2 size=4294967296 backing_file=/local/x2003239/mcc2019-input.qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
..................
=====================================================================
Generated by BenchKit 2-3954
Executing tool tapaal
Input is SharedMemory-COL-000200, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r160-csrt-155286431700155
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 176K
-rw-r--r-- 1 mcc users 4.3K Feb 12 18:42 CTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Feb 12 18:40 CTLCardinality.xml
-rw-r--r-- 1 mcc users 2.9K Feb 9 02:02 CTLFireability.txt
-rw-r--r-- 1 mcc users 16K Feb 9 02:01 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K Mar 10 17:31 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 110 Feb 24 15:05 GlobalProperties.txt
-rw-r--r-- 1 mcc users 348 Feb 24 15:05 GlobalProperties.xml
-rw-r--r-- 1 mcc users 2.4K Feb 5 01:26 LTLCardinality.txt
-rw-r--r-- 1 mcc users 9.3K Feb 5 01:25 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K Feb 4 22:48 LTLFireability.txt
-rw-r--r-- 1 mcc users 8.2K Feb 4 22:48 LTLFireability.xml
-rw-r--r-- 1 mcc users 3.3K Feb 4 20:37 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 14K Feb 4 20:36 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 3.2K Feb 1 20:56 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 16K Feb 1 20:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.8K Feb 4 22:30 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Feb 4 22:30 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 Jan 29 09:35 equiv_pt
-rw-r--r-- 1 mcc users 7 Jan 29 09:35 instance
-rw-r--r-- 1 mcc users 5 Jan 29 09:35 iscolored
-rw-r--r-- 1 mcc users 20K Mar 10 17:31 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 SharedMemory-COL-000200-UpperBounds-00
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-01
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-02
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-03
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-04
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-05
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-06
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-07
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-08
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-09
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-10
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-11
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-12
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-13
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-14
FORMULA_NAME SharedMemory-COL-000200-UpperBounds-15

=== Now, execution of the tool begins

BK_START 1552987958367

tapaal
---> tapaal --- TAPAAL
Total timeout: 3590
Time left: 3590

*****************************************
* TAPAAL CLASSIC verifying UpperBounds *
*****************************************
/home/mcc/tmp
/home/mcc/tmp/tmp.Lf3x8TSyyg
/home/mcc/tmp/tmp.ENrsSXpFb5
Time left: 3590
---------------------------------------------------
Step -1: Stripping Colors
---------------------------------------------------
Verifying stripped models (16 in total)
Solution found by stripping colors (step -1) for query index 0
Solution found by stripping colors (step -1) for query index 2
Solution found by stripping colors (step -1) for query index 6
Solution found by stripping colors (step -1) for query index 7
Solution found by stripping colors (step -1) for query index 8
Solution found by stripping colors (step -1) for query index 9
Solution found by stripping colors (step -1) for query index 10





FORMULA SharedMemory-COL-000200-UpperBounds-00 200 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 0 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA SharedMemory-COL-000200-UpperBounds-02 200 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 2 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA SharedMemory-COL-000200-UpperBounds-06 200 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 6 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA SharedMemory-COL-000200-UpperBounds-07 200 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 7 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA SharedMemory-COL-000200-UpperBounds-08 200 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 8 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA SharedMemory-COL-000200-UpperBounds-09 200 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 9 was solved

Query is satisfied.

Solved using CPN Approximation



FORMULA SharedMemory-COL-000200-UpperBounds-10 200 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT CPN_APPROX EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Query index 10 was solved

Query is satisfied.

Solved using CPN Approximation



Unable to decide if SharedMemory-COL-000200-UpperBounds-01 is satisfied.

Query is MAYBE satisfied.


Unable to decide if SharedMemory-COL-000200-UpperBounds-14 is satisfied.

Query is MAYBE satisfied.


Unable to decide if SharedMemory-COL-000200-UpperBounds-03 is satisfied.

Query is MAYBE satisfied.


Unable to decide if SharedMemory-COL-000200-UpperBounds-05 is satisfied.

Query is MAYBE satisfied.


Unable to decide if SharedMemory-COL-000200-UpperBounds-12 is satisfied.

Query is MAYBE satisfied.


Unable to decide if SharedMemory-COL-000200-UpperBounds-15 is satisfied.

Query is MAYBE satisfied.


Unable to decide if SharedMemory-COL-000200-UpperBounds-04 is satisfied.

Query is MAYBE satisfied.


Unable to decide if SharedMemory-COL-000200-UpperBounds-11 is satisfied.

Query is MAYBE satisfied.


Unable to decide if SharedMemory-COL-000200-UpperBounds-13 is satisfied.

Query is MAYBE satisfied.
Time left: 3590
---------------------------------------------------
Step 0: Parallel Simplification
---------------------------------------------------
Doing parallel simplification (9 in total)
Total simplification timout is 718 -- reduction timeout is 299
/home/mcc/BenchKit/bin/verifypn -n -q 718 -l 29 -d 299 -z 4 -s OverApprox --write-simplified /home/mcc/tmp/tmp.Lf3x8TSyyg --write-reduced /home/mcc/tmp/tmp.ENrsSXpFb5 -x 2,4,5,6,12,13,14,15,16 ./model.pnml ./UpperBounds.xml
note: lpsolve timeout
note: lpsolve timeout
note: lpsolve timeout
note: lpsolve timeout
note: lpsolve timeout
note: lpsolve timeout
note: lpsolve timeout




note: lpsolve timeout
note: lpsolve timeout
note: lpsolve timeout
note: lpsolve timeout

note: lpsolve timeout
note: lpsolve timeout
note: lpsolve timeout
Time left: 2829

---------------------------------------------------
Step 1: Parallel processing
---------------------------------------------------
Doing parallel verification of individual queries (9 in total)
Each query is verified by 3 parallel strategies for 138 seconds
------------------- QUERY 1 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 2689
------------------- QUERY 2 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 2548
------------------- QUERY 3 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 2408
------------------- QUERY 4 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 2268
------------------- QUERY 5 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 2128
------------------- QUERY 6 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 1988
------------------- QUERY 7 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 1848
------------------- QUERY 8 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").




Query index 0 was solved

Query is satisfied.

@@@16.69,277548@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -s\ BFS\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/tmp/tmp.ENrsSXpFb5 /home/mcc/tmp/tmp.Lf3x8TSyyg --binary-query-io 1 -x 8 -n

FORMULA SharedMemory-COL-000200-UpperBounds-01 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION STUBBORN_SETS
Time left: 1831
------------------- QUERY 9 ----------------------
Solution found by parallel processing (step 1)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").




Query index 0 was solved

Query is satisfied.

@@@18.19,277648@@@
parallel: This job succeeded:
eval /usr/bin/time -f "@@@%e,%M@@@" /home/mcc/BenchKit/bin/verifypn -n -n\ -p\ -q\ 0\ -l\ 0\ -d\ 119 /home/mcc/tmp/tmp.ENrsSXpFb5 /home/mcc/tmp/tmp.Lf3x8TSyyg --binary-query-io 1 -x 9 -n

FORMULA SharedMemory-COL-000200-UpperBounds-14 1 TECHNIQUES COLLATERAL_PROCESSING STRUCTURAL_REDUCTION QUERY_REDUCTION SAT_SMT EXPLICIT STATE_COMPRESSION
Time left: 1813
---------------------------------------------------
Step 2: Sequential processing
---------------------------------------------------
Remaining 7 queries are verified sequentially.
Each query is verified for a dynamic timeout (at least 0 seconds)
Time left: 1813
Time left: 1813
---------------------------------------------------
Step 3: Multiquery processing
---------------------------------------------------
Remaining 7 queries are solved using multiquery
Time remaining: 1813 seconds of the initial 3590 seconds
Running multiquery on -x 1,2,3,4,5,6,7 for 1359 seconds

Time left: 454
---------------------------------------------------
Step 4: Random Parallel processing
---------------------------------------------------
Doing random parallel verification of individual queries (7 in total)
Each query is verified by 4 parallel strategies for 64 seconds
------------------- QUERY 1 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 387
------------------- QUERY 2 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 320
------------------- QUERY 3 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 254
------------------- QUERY 4 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 187
------------------- QUERY 5 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 120
------------------- QUERY 6 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: 54
------------------- QUERY 7 ----------------------
No solution found
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").


Time left: -2
Out of time, terminating!

BK_STOP 1552991550840

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

Command exited with non-zero status 124
"@@@1359.16,4424792@@@"

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="SharedMemory-COL-000200"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="tapaal"
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 2-3954"
echo " Executing tool tapaal"
echo " Input is SharedMemory-COL-000200, 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 r160-csrt-155286431700155"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/SharedMemory-COL-000200.tgz
mv SharedMemory-COL-000200 execution
cd execution
if [ "UpperBounds" = "GlobalProperties" ] ; then
rm -f GenericPropertiesVerdict.xml
fi
if [ "UpperBounds" = "UpperBounds" ] ; 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
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 ;