About the Execution of LTSMin+red for DBSingleClientW-PT-d2m09
Execution Summary | |||||
Max Memory Used (MB) |
Time wait (ms) | CPU Usage (ms) | I/O Wait (ms) | Computed Result | Execution Status |
698.439 | 16375.00 | 31418.00 | 63.70 | TTTFTFTTTTTFTTTF | 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.r480-tall-171624189600591.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 ltsminxred
Input is DBSingleClientW-PT-d2m09, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r480-tall-171624189600591
=====================================================================
--------------------
preparation of the directory to be used:
/home/mcc/execution
total 2.0M
-rw-r--r-- 1 mcc users 8.0K May 14 13:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 89K May 14 13:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.8K May 14 13:22 CTLFireability.txt
-rw-r--r-- 1 mcc users 64K May 14 13:22 CTLFireability.xml
-rw-r--r-- 1 mcc users 3.4K Apr 22 14:36 LTLCardinality.txt
-rw-r--r-- 1 mcc users 21K Apr 22 14:36 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.2K May 19 07:15 LTLFireability.txt
-rw-r--r-- 1 mcc users 18K May 19 18:07 LTLFireability.xml
-rw-r--r-- 1 mcc users 12K Apr 12 12:52 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 128K Apr 12 12:52 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 8.5K Apr 12 12:51 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 70K Apr 12 12:51 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K Apr 22 14:36 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K Apr 22 14:36 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 18 16:42 equiv_col
-rw-r--r-- 1 mcc users 6 May 18 16:42 instance
-rw-r--r-- 1 mcc users 6 May 18 16:42 iscolored
-rw-r--r-- 1 mcc users 1.6M 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 DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-00
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-01
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-02
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-03
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-04
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-05
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-06
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-07
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-08
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-09
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-10
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-11
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-12
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-13
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-14
FORMULA_NAME DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-15
=== Now, execution of the tool begins
BK_START 1717191337962
Invoking MCC driver with
BK_TOOL=ltsminxred
BK_EXAMINATION=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=DBSingleClientW-PT-d2m09
BK_MEMORY_CONFINEMENT=16384
Applying reductions before tool ltsmin
Invoking reducer
Running Version 202405141337
[2024-05-31 21:35:39] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -timeout, 360, -rebuildPNML]
[2024-05-31 21:35:39] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-31 21:35:39] [INFO ] Load time of PNML (sax parser for PT used): 199 ms
[2024-05-31 21:35:39] [INFO ] Transformed 4763 places.
[2024-05-31 21:35:39] [INFO ] Transformed 2478 transitions.
[2024-05-31 21:35:39] [INFO ] Parsed PT model containing 4763 places and 2478 transitions and 9912 arcs in 332 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 16 ms.
Working with output stream class java.io.PrintStream
Deduced a syphon composed of 3580 places in 16 ms
Reduce places removed 3580 places and 0 transitions.
RANDOM walk for 40000 steps (9207 resets) in 2634 ms. (15 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4004 steps (199 resets) in 57 ms. (69 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4003 steps (162 resets) in 35 ms. (111 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4003 steps (188 resets) in 51 ms. (76 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4003 steps (180 resets) in 31 ms. (125 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4003 steps (406 resets) in 109 ms. (36 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4003 steps (166 resets) in 32 ms. (121 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4003 steps (178 resets) in 89 ms. (44 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4002 steps (179 resets) in 257 ms. (15 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4003 steps (176 resets) in 127 ms. (31 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4004 steps (174 resets) in 98 ms. (40 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4004 steps (169 resets) in 187 ms. (21 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4003 steps (183 resets) in 40 ms. (97 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4004 steps (165 resets) in 27 ms. (143 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4002 steps (174 resets) in 28 ms. (138 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4002 steps (171 resets) in 26 ms. (148 steps per ms) remains 16/16 properties
BEST_FIRST walk for 4003 steps (187 resets) in 26 ms. (148 steps per ms) remains 16/16 properties
Interrupted probabilistic random walk after 217903 steps, run timeout after 3001 ms. (steps per millisecond=72 ) properties seen :9 out of 16
Probabilistic random walk after 217903 steps, saw 92122 distinct states, run finished after 3005 ms. (steps per millisecond=72 ) properties seen :9
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-15 FALSE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-13 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-11 FALSE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-10 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-09 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-07 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-05 FALSE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-01 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-00 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
// Phase 1: matrix 2478 rows 1183 cols
[2024-05-31 21:35:44] [INFO ] Computed 6 invariants in 128 ms
[2024-05-31 21:35:44] [INFO ] State equation strengthened by 1588 read => feed constraints.
All remaining problems are real, not stopping.
At refinement iteration 0 (INCLUDED_ONLY) 0/90 variables, 0/0 constraints. Problems are: Problem set: 0 solved, 7 unsolved
At refinement iteration 1 (OVERLAPS) 480/570 variables, 2/2 constraints. Problems are: Problem set: 0 solved, 7 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/570 variables, 0/2 constraints. Problems are: Problem set: 0 solved, 7 unsolved
Problem DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-02 is UNSAT
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-02 TRUE TECHNIQUES SMT_REFINEMENT
Problem DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-03 is UNSAT
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-03 FALSE TECHNIQUES SMT_REFINEMENT
Problem DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-06 is UNSAT
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-06 TRUE TECHNIQUES SMT_REFINEMENT
Problem DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-08 is UNSAT
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-08 TRUE TECHNIQUES SMT_REFINEMENT
Problem DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-12 is UNSAT
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-12 TRUE TECHNIQUES SMT_REFINEMENT
At refinement iteration 3 (OVERLAPS) 613/1183 variables, 4/6 constraints. Problems are: Problem set: 5 solved, 2 unsolved
At refinement iteration 4 (INCLUDED_ONLY) 0/1183 variables, 0/6 constraints. Problems are: Problem set: 5 solved, 2 unsolved
At refinement iteration 5 (OVERLAPS) 2478/3661 variables, 1183/1189 constraints. Problems are: Problem set: 5 solved, 2 unsolved
At refinement iteration 6 (INCLUDED_ONLY) 0/3661 variables, 1588/2777 constraints. Problems are: Problem set: 5 solved, 2 unsolved
At refinement iteration 7 (INCLUDED_ONLY) 0/3661 variables, 0/2777 constraints. Problems are: Problem set: 5 solved, 2 unsolved
At refinement iteration 8 (OVERLAPS) 0/3661 variables, 0/2777 constraints. Problems are: Problem set: 5 solved, 2 unsolved
No progress, stopping.
After SMT solving in domain Real declared 3661/3661 variables, and 2777 constraints, problems are : Problem set: 5 solved, 2 unsolved in 2427 ms.
Refiners :[Positive P Invariants (semi-flows): 2/2 constraints, Generalized P Invariants (flows): 4/4 constraints, State Equation: 1183/1183 constraints, ReadFeed: 1588/1588 constraints, PredecessorRefiner: 7/2 constraints, Known Traps: 0/0 constraints]
Escalating to Integer solving :Problem set: 5 solved, 2 unsolved
At refinement iteration 0 (INCLUDED_ONLY) 0/43 variables, 0/0 constraints. Problems are: Problem set: 5 solved, 2 unsolved
At refinement iteration 1 (OVERLAPS) 513/556 variables, 2/2 constraints. Problems are: Problem set: 5 solved, 2 unsolved
At refinement iteration 2 (INCLUDED_ONLY) 0/556 variables, 0/2 constraints. Problems are: Problem set: 5 solved, 2 unsolved
At refinement iteration 3 (OVERLAPS) 627/1183 variables, 4/6 constraints. Problems are: Problem set: 5 solved, 2 unsolved
[2024-05-31 21:35:48] [INFO ] Deduced a trap composed of 34 places in 834 ms of which 130 ms to minimize.
[2024-05-31 21:35:49] [INFO ] Deduced a trap composed of 73 places in 697 ms of which 8 ms to minimize.
[2024-05-31 21:35:49] [INFO ] Deduced a trap composed of 149 places in 663 ms of which 9 ms to minimize.
[2024-05-31 21:35:50] [INFO ] Deduced a trap composed of 33 places in 716 ms of which 7 ms to minimize.
[2024-05-31 21:35:51] [INFO ] Deduced a trap composed of 178 places in 625 ms of which 7 ms to minimize.
[2024-05-31 21:35:51] [INFO ] Deduced a trap composed of 148 places in 718 ms of which 8 ms to minimize.
[2024-05-31 21:35:52] [INFO ] Deduced a trap composed of 33 places in 723 ms of which 7 ms to minimize.
SMT process timed out in 8749ms, After SMT, problems are : Problem set: 5 solved, 2 unsolved
Skipping Parikh replay, no witness traces provided.
Support contains 43 out of 1183 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 1183/1183 places, 2478/2478 transitions.
Graph (complete) has 4476 edges and 1183 vertex of which 1136 are kept as prefixes of interest. Removing 47 places using SCC suffix rule.7 ms
Discarding 47 places :
Also discarding 0 output transitions
Drop transitions (Empty/Sink Transition effects.) removed 18 transitions
Ensure Unique test removed 199 transitions
Reduce isomorphic transitions removed 217 transitions.
Iterating post reduction 0 with 217 rules applied. Total rules applied 218 place count 1136 transition count 2261
Discarding 371 places :
Symmetric choice reduction at 1 with 371 rule applications. Total rules 589 place count 765 transition count 1397
Iterating global reduction 1 with 371 rules applied. Total rules applied 960 place count 765 transition count 1397
Ensure Unique test removed 54 transitions
Reduce isomorphic transitions removed 54 transitions.
Iterating post reduction 1 with 54 rules applied. Total rules applied 1014 place count 765 transition count 1343
Discarding 292 places :
Symmetric choice reduction at 2 with 292 rule applications. Total rules 1306 place count 473 transition count 1051
Iterating global reduction 2 with 292 rules applied. Total rules applied 1598 place count 473 transition count 1051
Ensure Unique test removed 7 transitions
Reduce isomorphic transitions removed 7 transitions.
Iterating post reduction 2 with 7 rules applied. Total rules applied 1605 place count 473 transition count 1044
Discarding 215 places :
Symmetric choice reduction at 3 with 215 rule applications. Total rules 1820 place count 258 transition count 744
Iterating global reduction 3 with 215 rules applied. Total rules applied 2035 place count 258 transition count 744
Ensure Unique test removed 218 transitions
Reduce isomorphic transitions removed 218 transitions.
Iterating post reduction 3 with 218 rules applied. Total rules applied 2253 place count 258 transition count 526
Discarding 14 places :
Symmetric choice reduction at 4 with 14 rule applications. Total rules 2267 place count 244 transition count 507
Iterating global reduction 4 with 14 rules applied. Total rules applied 2281 place count 244 transition count 507
Ensure Unique test removed 12 transitions
Reduce isomorphic transitions removed 12 transitions.
Iterating post reduction 4 with 12 rules applied. Total rules applied 2293 place count 244 transition count 495
Discarding 7 places :
Symmetric choice reduction at 5 with 7 rule applications. Total rules 2300 place count 237 transition count 488
Iterating global reduction 5 with 7 rules applied. Total rules applied 2307 place count 237 transition count 488
Ensure Unique test removed 3 transitions
Reduce isomorphic transitions removed 3 transitions.
Iterating post reduction 5 with 3 rules applied. Total rules applied 2310 place count 237 transition count 485
Discarding 5 places :
Symmetric choice reduction at 6 with 5 rule applications. Total rules 2315 place count 232 transition count 480
Iterating global reduction 6 with 5 rules applied. Total rules applied 2320 place count 232 transition count 480
Ensure Unique test removed 6 transitions
Reduce isomorphic transitions removed 6 transitions.
Iterating post reduction 6 with 6 rules applied. Total rules applied 2326 place count 232 transition count 474
Discarding 1 places :
Symmetric choice reduction at 7 with 1 rule applications. Total rules 2327 place count 231 transition count 472
Iterating global reduction 7 with 1 rules applied. Total rules applied 2328 place count 231 transition count 472
Applied a total of 2328 rules in 281 ms. Remains 231 /1183 variables (removed 952) and now considering 472/2478 (removed 2006) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 290 ms. Remains : 231/1183 places, 472/2478 transitions.
RANDOM walk for 40000 steps (9125 resets) in 446 ms. (89 steps per ms) remains 2/2 properties
BEST_FIRST walk for 40002 steps (3814 resets) in 160 ms. (248 steps per ms) remains 2/2 properties
BEST_FIRST walk for 40003 steps (1732 resets) in 141 ms. (281 steps per ms) remains 2/2 properties
Finished probabilistic random walk after 315307 steps, run visited all 2 properties in 1058 ms. (steps per millisecond=298 )
Probabilistic random walk after 315307 steps, saw 124239 distinct states, run finished after 1062 ms. (steps per millisecond=296 ) properties seen :2
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-14 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
FORMULA DBSingleClientW-PT-d2m09-ReachabilityFireability-2024-04 TRUE TECHNIQUES TOPOLOGICAL PROBABILISTIC_WALK
All properties solved without resorting to model-checking.
Total runtime 15052 ms.
ITS solved all properties within timeout
BK_STOP 1717191354337
--------------------
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_1.0.0.202405141337.jar
+ VERSION=202405141337
+ echo 'Running Version 202405141337'
+ /home/mcc/BenchKit/bin//../reducer/bin//../../itstools//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityFireability -timeout 360 -rebuildPNML
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="DBSingleClientW-PT-d2m09"
export BK_EXAMINATION="ReachabilityFireability"
export BK_TOOL="ltsminxred"
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 ltsminxred"
echo " Input is DBSingleClientW-PT-d2m09, examination is ReachabilityFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r480-tall-171624189600591"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"
tar xzf /home/mcc/BenchKit/INPUTS/DBSingleClientW-PT-d2m09.tgz
mv DBSingleClientW-PT-d2m09 execution
cd execution
if [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "UpperBounds" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] || [ "ReachabilityFireability" = "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 [ "ReachabilityFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "ReachabilityFireability" != "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 "ReachabilityFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property ReachabilityFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "ReachabilityFireability.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 [ "ReachabilityFireability" = "ReachabilityDeadlock" ] || [ "ReachabilityFireability" = "QuasiLiveness" ] || [ "ReachabilityFireability" = "StableMarking" ] || [ "ReachabilityFireability" = "Liveness" ] || [ "ReachabilityFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME ReachabilityFireability"
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 ;