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.r138-smll-167819421000526.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 marciexred
Input is DoubleLock-PT-p1s3, examination is ReachabilityCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r138-smll-167819421000526
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 3.7M
-rw-r--r-- 1 mcc users 5.8K Feb 25 14:20 CTLCardinality.txt
-rw-r--r-- 1 mcc users 57K Feb 25 14:20 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.6K Feb 25 14:18 CTLFireability.txt
-rw-r--r-- 1 mcc users 50K Feb 25 14:18 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.3K Feb 25 16:01 LTLCardinality.txt
-rw-r--r-- 1 mcc users 23K Feb 25 16:01 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K Feb 25 16:01 LTLFireability.txt
-rw-r--r-- 1 mcc users 14K Feb 25 16:01 LTLFireability.xml
-rw-r--r-- 1 mcc users 9.1K Feb 25 14:22 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 93K Feb 25 14:22 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 8.2K Feb 25 14:21 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 68K Feb 25 14:21 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Feb 25 16:01 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.7K Feb 25 16:01 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 equiv_col
-rw-r--r-- 1 mcc users 5 Mar 5 18:22 instance
-rw-r--r-- 1 mcc users 6 Mar 5 18:22 iscolored
-rw-r--r-- 1 mcc users 3.4M Mar 5 18:22 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 DoubleLock-PT-p1s3-ReachabilityCardinality-00
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-01
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-02
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-03
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-04
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-05
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-06
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-07
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-08
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-09
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-10
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-11
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-12
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-13
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-14
FORMULA_NAME DoubleLock-PT-p1s3-ReachabilityCardinality-15

=== Now, execution of the tool begins

BK_START 1678935968579

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=marciexred
BK_EXAMINATION=ReachabilityCardinality
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=DoubleLock-PT-p1s3
Applying reductions before tool marcie
Invoking reducer
Running Version 202303021504
[2023-03-16 03:06:11] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityCardinality, -timeout, 360, -rebuildPNML]
[2023-03-16 03:06:11] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2023-03-16 03:06:12] [INFO ] Load time of PNML (sax parser for PT used): 620 ms
[2023-03-16 03:06:12] [INFO ] Transformed 570 places.
[2023-03-16 03:06:12] [INFO ] Transformed 7568 transitions.
[2023-03-16 03:06:12] [INFO ] Parsed PT model containing 570 places and 7568 transitions and 30656 arcs in 784 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityCardinality.xml in 19 ms.
Working with output stream class java.io.PrintStream
Deduced a syphon composed of 132 places in 25 ms
Reduce places removed 132 places and 256 transitions.
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-05 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-07 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-09 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-13 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Incomplete random walk after 10002 steps, including 92 resets, run finished after 621 ms. (steps per millisecond=16 ) properties (out of 11) seen :1
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-08 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
Incomplete Best-First random walk after 10001 steps, including 12 resets, run finished after 107 ms. (steps per millisecond=93 ) properties (out of 10) seen :0
Incomplete Best-First random walk after 10001 steps, including 15 resets, run finished after 74 ms. (steps per millisecond=135 ) properties (out of 10) seen :0
Incomplete Best-First random walk after 10001 steps, including 12 resets, run finished after 127 ms. (steps per millisecond=78 ) properties (out of 10) seen :0
Incomplete Best-First random walk after 10001 steps, including 13 resets, run finished after 94 ms. (steps per millisecond=106 ) properties (out of 10) seen :0
Incomplete Best-First random walk after 10001 steps, including 14 resets, run finished after 78 ms. (steps per millisecond=128 ) properties (out of 10) seen :0
Incomplete Best-First random walk after 10001 steps, including 16 resets, run finished after 74 ms. (steps per millisecond=135 ) properties (out of 10) seen :0
Incomplete Best-First random walk after 10001 steps, including 14 resets, run finished after 68 ms. (steps per millisecond=147 ) properties (out of 10) seen :0
Incomplete Best-First random walk after 10001 steps, including 12 resets, run finished after 75 ms. (steps per millisecond=133 ) properties (out of 10) seen :0
Incomplete Best-First random walk after 10001 steps, including 12 resets, run finished after 62 ms. (steps per millisecond=161 ) properties (out of 10) seen :0
Incomplete Best-First random walk after 10001 steps, including 12 resets, run finished after 78 ms. (steps per millisecond=128 ) properties (out of 10) seen :0
Interrupted probabilistic random walk after 52806 steps, run timeout after 3001 ms. (steps per millisecond=17 ) properties seen :{}
Probabilistic random walk after 52806 steps, saw 42018 distinct states, run finished after 3007 ms. (steps per millisecond=17 ) properties seen :0
Running SMT prover for 10 properties.
[2023-03-16 03:06:17] [INFO ] Flow matrix only has 4971 transitions (discarded 2341 similar events)
// Phase 1: matrix 4971 rows 438 cols
[2023-03-16 03:06:17] [INFO ] Computed 4 place invariants in 87 ms
[2023-03-16 03:06:18] [INFO ] After 722ms SMT Verify possible using all constraints in real domain returned unsat :0 sat :0 real:10
[2023-03-16 03:06:18] [INFO ] [Nat]Absence check using 3 positive place invariants in 10 ms returned sat
[2023-03-16 03:06:18] [INFO ] [Nat]Absence check using 3 positive and 1 generalized place invariants in 2 ms returned sat
[2023-03-16 03:06:20] [INFO ] After 2342ms SMT Verify possible using state equation in natural domain returned unsat :9 sat :1
[2023-03-16 03:06:20] [INFO ] State equation strengthened by 400 read => feed constraints.
[2023-03-16 03:06:24] [INFO ] After 4089ms SMT Verify possible using 400 Read/Feed constraints in natural domain returned unsat :9 sat :1
[2023-03-16 03:06:26] [INFO ] Deduced a trap composed of 193 places in 984 ms of which 11 ms to minimize.
[2023-03-16 03:06:27] [INFO ] Deduced a trap composed of 196 places in 985 ms of which 2 ms to minimize.
[2023-03-16 03:06:27] [INFO ] Trap strengthening (SAT) tested/added 3/2 trap constraints in 2509 ms
[2023-03-16 03:06:27] [INFO ] After 6767ms SMT Verify possible using trap constraints in natural domain returned unsat :9 sat :1
Attempting to minimize the solution found.
Minimization took 212 ms.
[2023-03-16 03:06:27] [INFO ] After 9833ms SMT Verify possible using all constraints in natural domain returned unsat :9 sat :1
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-15 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-12 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-11 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-10 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-04 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-03 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-02 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-01 TRUE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-00 FALSE TECHNIQUES STRUCTURAL_REDUCTION TOPOLOGICAL SAT_SMT
Fused 10 Parikh solutions to 1 different solutions.
Parikh walk visited 0 properties in 16 ms.
Support contains 2 out of 438 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 438/438 places, 7312/7312 transitions.
Graph (complete) has 12297 edges and 438 vertex of which 434 are kept as prefixes of interest. Removing 4 places using SCC suffix rule.39 ms
Discarding 4 places :
Also discarding 0 output transitions
Drop transitions removed 128 transitions
Reduce isomorphic transitions removed 128 transitions.
Iterating post reduction 0 with 128 rules applied. Total rules applied 129 place count 434 transition count 7184
Discarding 1 places :
Symmetric choice reduction at 1 with 1 rule applications. Total rules 130 place count 433 transition count 7056
Iterating global reduction 1 with 1 rules applied. Total rules applied 131 place count 433 transition count 7056
Applied a total of 131 rules in 829 ms. Remains 433 /438 variables (removed 5) and now considering 7056/7312 (removed 256) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 832 ms. Remains : 433/438 places, 7056/7312 transitions.
Incomplete random walk after 10000 steps, including 93 resets, run finished after 50 ms. (steps per millisecond=200 ) properties (out of 1) seen :0
Finished Best-First random walk after 6872 steps, including 8 resets, run visited all 1 properties in 12 ms. (steps per millisecond=572 )
FORMULA DoubleLock-PT-p1s3-ReachabilityCardinality-06 TRUE TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
All properties solved without resorting to model-checking.
Total runtime 17295 ms.
timeout --kill-after=10s --signal=SIGINT 1m for testing only

Marcie built on Linux at 2019-11-18.
A model checker for Generalized Stochastic Petri nets

authors: Alex Tovchigrechko (IDD package and CTL model checking)

Martin Schwarick (Symbolic numerical analysis and CSL model checking)

Christian Rohr (Simulative and approximative numerical model checking)

marcie@informatik.tu-cottbus.de

called as: /home/mcc/BenchKit/bin//../reducer/bin//../../marcie/bin/marcie --net-file=model.pnml --mcc-file=ReachabilityCardinality.xml --memory=6 --mcc-mode

parse successfull
net created successfully

Net: DoubleLock_PT_p1s3
(NrP: 570 NrTr: 7568 NrArc: 30656)

parse formulas
formulas created successfully
place and transition orderings generation:0m 0.718sec

net check time: 0m 0.004sec

init dd package: 0m 3.229sec

TIME LIMIT: Killed by timeout after 3600 seconds
MemTotal: 16393216 kB
MemFree: 10134704 kB
After kill :
MemTotal: 16393216 kB
MemFree: 16097108 kB

BK_TIME_CONFINEMENT_REACHED

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

+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ export PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ PYTHONPATH=/home/mcc/BenchKit/itstools/pylibs
+ export LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
+ LD_LIBRARY_PATH=/home/mcc/BenchKit/itstools/pylibs:
++ sed s/.jar//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202303021504.jar
+ VERSION=202303021504
+ echo 'Running Version 202303021504'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityCardinality -timeout 360 -rebuildPNML
check for maximal unmarked siphon
found
The net has a maximal unmarked siphon:
p443
p388
p399
p410
p421
p432
p444
p455
p466
p477
p488
p499
p510
l29
p384
p385
p386
p387
p389
p390
p391
p392
p393
p394
p395
p396
p397
p398
p400
p401
p402
p403
p404
p405
p406
p407
p408
p409
p411
p412
p413
p414
p415
p416
p417
p418
p419
p420
p422
p423
p424
p425
p426
p427
p428
p429
p430
p431
p433
p434
p435
p436
p437
p438
p439
p440
p441
p442
p445
p446
p447
p448
p449
p450
p451
p452
p453
p454
p456
p457
p458
p459
p460
p461
p462
p463
p464
p465
p467
p468
p469
p470
p471
p472
p473
p474
p475
p476
p478
p479
p480
p481
p482
p483
p484
p485
p486
p487
p489
p490
p491
p492
p493
p494
p495
p496
p497
p498
p500
p501
p502
p503
p504
p505
p506
p507
p508
p509
p511
l28
l54
l55

The net has transition(s) that can never fire:
t884
t1028
t4108
t4119
t4144
t4155
t2082
t1064
t1075
t1100
t1111
t1136
t1147
t1172
t1183
t1218
t1207
t2328
t2339
t1242
t1253
t1277
t1288
t1312
t1323
t1347
t1358
t1382
t1393
t1417
t1428
t1452
t1463
t1487
t1498
t1522
t1533
t1557
t1568
t1592
t1603
t1627
t1638
t1662
t1673
t1697
t1708
t1732
t1743
t1767
t1778
t1802
t1813
t1837
t1848
t1872
t1883
t1907
t1918
t1942
t1953
t1977
t1988
t2012
t2023
t2058
t2047
t4180
t4191
t4216
t4227
t4252
t4263
t2152
t2163
t2187
t2198
t2222
t2233
t2257
t2268
t2292
t2303
t2364
t2375
t2400
t2411
t2436
t2447
t2472
t2487
t2512
t2527
t2552
t2563
t2588
t2599
t2624
t2635
t2660
t2671
t2696
t2707
t2732
t2743
t2768
t2779
t2804
t2815
t2840
t2851
t2876
t2887
t2912
t2923
t2948
t2959
t2984
t2995
t3020
t3031
t3056
t3071
t3096
t3111
t3136
t3147
t3172
t3183
t3208
t3219
t3244
t3255
t3280
t3291
t3316
t3327
t3352
t3363
t3388
t3399
t3424
t3435
t3460
t3471
t3496
t3507
t3532
t3543
t3568
t3579
t3604
t3615
t3640
t3651
t3676
t3687
t3712
t3723
t3748
t3759
t3784
t3795
t3820
t3831
t3856
t3867
t3892
t3903
t3928
t3939
t3964
t3975
t4000
t4011
t4036
t4047
t4072
t4083
t4288
t4299
t4324
t4335
t4360
t4371
t4396
t4407
t4432
t4443
t4468
t4479
t4504
t4515
t4540
t4551
t4576
t4587
t4612
t4623
t920
t931
t956
t967
t992
t1003
t24
t267
t339
t544
t616
t635
t679
t848
t303
t43
t68
t87
t112
t123
t148
t159
t184
t195
t859
t220
t231
t256
t292
t823
t328
t364
t375
t400
t411
t436
t447
t472
t483
t508
t519
t555
t580
t591
t660
t704
t715
t740
t751
t776
t787
t812
t2093
t2117
t2128
t1039
t895

check for constant places
p384
p385
p386
p387
p388
p389
p390
p391
p392
p393
p394
p395
p396
p397
p398
p399
p400
p401
p402
p403
p404
p405
p406
p407
p408
p409
p410
p411
p412
p413
p414
p415
p416
p417
p418
p419
p420
p421
p422
p423
p424
p425
p426
p427
p428
p429
p430
p431
p432
p433
p434
p435
p436
p437
p438
p439
p440
p441
p442
p443
p444
p445
p446
p447
p448
p449
p450
p451
p452
p453
p454
p455
p456
p457
p458
p459
p460
p461
p462
p463
p464
p465
p466
p467
p468
p469
p470
p471
p472
p473
p474
p475
p476
p477
p478
p479
p480
p481
p482
p483
p484
p485
p486
p487
p488
p489
p490
p491
p492
p493
p494
p495
p496
p497
p498
p499
p500
p501
p502
p503
p504
p505
p506
p507
p508
p509
p510
p511
found 128 constant places
check if there are places and transitions
ok
check if there are transitions without pre-places
ok
check if at least one transition is enabled in m0
ok
check if there are transitions that can never fire
ok


initing FirstDep: 0m 0.197sec

4000 5334 5597 6185 25480 43900 62700 81490 99920 119080 137520 156300 175100 193520 212690 231120 250280 268700 287500 306290 324720 343880 362300 381100 399890 418320 437490 455920 475080 493500 511920 531090 549520 568680

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="DoubleLock-PT-p1s3"
export BK_EXAMINATION="ReachabilityCardinality"
export BK_TOOL="marciexred"
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 marciexred"
echo " Input is DoubleLock-PT-p1s3, examination is ReachabilityCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r138-smll-167819421000526"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/DoubleLock-PT-p1s3.tgz
mv DoubleLock-PT-p1s3 execution
cd execution
if [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "UpperBounds" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] || [ "ReachabilityCardinality" = "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 [ "ReachabilityCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityCardinality" != "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 "ReachabilityCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityCardinality.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 '' ReachabilityCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "ReachabilityCardinality" = "ReachabilityDeadlock" ] || [ "ReachabilityCardinality" = "QuasiLiveness" ] || [ "ReachabilityCardinality" = "StableMarking" ] || [ "ReachabilityCardinality" = "Liveness" ] || [ "ReachabilityCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityCardinality"
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 ;