Execution Chart

Sorry, for this execution, no execution chart could be reported.

Trace from the execution

Formatting '/data/fkordon/mcc2025-input.r002-tall-174853728900237.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fkordon/mcc2025-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 2-5832
Executing tool itstools
Input is Angiogenesis-PT-10, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r002-tall-174853728900237
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 648K
-rw-r--r-- 1 mcc users 7.9K May 29 14:47 CTLCardinality.txt
-rw-r--r-- 1 mcc users 79K May 29 14:47 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.0K May 29 14:47 CTLFireability.txt
-rw-r--r-- 1 mcc users 56K May 29 14:47 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 29 14:32 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 4.4K May 29 14:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 29K May 29 14:47 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.1K May 29 14:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 17K May 29 14:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 20K May 29 14:47 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 194K May 29 14:47 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 14K May 29 14:47 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 133K May 29 14:47 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.7K May 29 14:47 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.8K May 29 14:47 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 29 14:32 equiv_col
-rw-r--r-- 1 mcc users 3 May 29 14:32 instance
-rw-r--r-- 1 mcc users 6 May 29 14:32 iscolored
-rw-r--r-- 1 mcc users 33K May 29 14:32 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

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

=== Now, execution of the tool begins

BK_START 1748558385725

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=UpperBounds
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=Angiogenesis-PT-10
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
UpperBounds PT
Running Version 202505121319
[2025-05-29 22:39:46] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, UpperBounds, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2025-05-29 22:39:46] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2025-05-29 22:39:47] [INFO ] Load time of PNML (sax parser for PT used): 51 ms
[2025-05-29 22:39:47] [INFO ] Transformed 39 places.
[2025-05-29 22:39:47] [INFO ] Transformed 64 transitions.
[2025-05-29 22:39:47] [INFO ] Parsed PT model containing 39 places and 64 transitions and 185 arcs in 137 ms.
Parsed 16 properties from file /home/mcc/execution/UpperBounds.xml in 6 ms.
Current structural bounds on expressions (Initially) : Max Seen:[10, 0, 0, 0, 0, 10, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
Current structural bounds on expressions (Before main loop) : Max Seen:[10, 0, 0, 0, 0, 10, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0] Max Struct:[+inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf, +inf]
// Phase 1: matrix 64 rows 39 cols
[2025-05-29 22:39:47] [INFO ] Computed 8 invariants in 11 ms
Current structural bounds on expressions (after invariants) : Max Seen:[10, 0, 0, 0, 0, 10, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0] Max Struct:[10, 10, 10, 10, 10, 10, 10, 5, 10, 10, 10, 10, 10, 10, 10, 10]
FORMULA Angiogenesis-PT-10-UpperBounds-09 10 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Angiogenesis-PT-10-UpperBounds-05 10 TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA Angiogenesis-PT-10-UpperBounds-00 10 TECHNIQUES TOPOLOGICAL INITIAL_STATE
RANDOM walk for 10005 steps (4 resets) in 15 ms. (625 steps per ms)
FORMULA Angiogenesis-PT-10-UpperBounds-15 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-14 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-13 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-12 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-11 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-10 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-06 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-04 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-03 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-02 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
FORMULA Angiogenesis-PT-10-UpperBounds-01 10 TECHNIQUES TOPOLOGICAL BESTFIRST_WALK
BEST_FIRST walk for 20002 steps (4 resets) in 34 ms. (571 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[0, 4] Max Struct:[5, 10]
[2025-05-29 22:39:47] [INFO ] Invariant cache hit.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2025-05-29 22:39:47] [INFO ] [Real]Absence check using 8 positive place invariants in 8 ms returned sat
[2025-05-29 22:39:47] [INFO ] [Real]Absence check using state equation in 36 ms returned sat
[2025-05-29 22:39:47] [INFO ] Computed and/alt/rep : 59/142/59 causal constraints (skipped 2 transitions) in 9 ms.
[2025-05-29 22:39:47] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2025-05-29 22:39:47] [INFO ] [Nat]Absence check using 8 positive place invariants in 2 ms returned sat
[2025-05-29 22:39:47] [INFO ] [Nat]Absence check using state equation in 30 ms returned sat
[2025-05-29 22:39:47] [INFO ] Computed and/alt/rep : 59/142/59 causal constraints (skipped 2 transitions) in 8 ms.
[2025-05-29 22:39:47] [INFO ] Added : 48 causal constraints over 10 iterations in 109 ms. Result :sat
Minimization took 40 ms.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2025-05-29 22:39:47] [INFO ] [Real]Absence check using 8 positive place invariants in 2 ms returned sat
[2025-05-29 22:39:47] [INFO ] [Real]Absence check using state equation in 15 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-29 22:39:47] [INFO ] Deduced a trap composed of 23 places in 36 ms of which 7 ms to minimize.
[2025-05-29 22:39:47] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
[2025-05-29 22:39:47] [INFO ] [Nat]Absence check using 8 positive place invariants in 2 ms returned sat
[2025-05-29 22:39:47] [INFO ] [Nat]Absence check using state equation in 15 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-29 22:39:47] [INFO ] Deduced a trap composed of 23 places in 35 ms of which 2 ms to minimize.
[2025-05-29 22:39:47] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 43 ms
[2025-05-29 22:39:47] [INFO ] Computed and/alt/rep : 59/142/59 causal constraints (skipped 2 transitions) in 5 ms.
[2025-05-29 22:39:47] [INFO ] Added : 47 causal constraints over 10 iterations in 73 ms. Result :sat
Minimization took 24 ms.
Current structural bounds on expressions (after SMT) : Max Seen:[0, 4] Max Struct:[5, 10]
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[5, 9] Max Struct:[5, 10]
Support contains 2 out of 39 places. Attempting structural reductions.
Starting structural reductions in REACHABILITY mode, iteration 0 : 39/39 places, 64/64 transitions.
Graph (complete) has 117 edges and 39 vertex of which 38 are kept as prefixes of interest. Removing 1 places using SCC suffix rule.0 ms
Discarding 1 places :
Also discarding 0 output transitions
Performed 1 Pre agglomeration using Quasi-Persistent + Divergent Free condition..
Pre-agglomeration after 0 with 1 Pre rules applied. Total rules applied 1 place count 38 transition count 63
Deduced a syphon composed of 1 places in 0 ms
Reduce places removed 2 places and 0 transitions.
Iterating global reduction 0 with 3 rules applied. Total rules applied 4 place count 36 transition count 63
Drop transitions (Empty/Sink Transition effects.) removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 0 with 1 rules applied. Total rules applied 5 place count 36 transition count 62
Performed 9 Post agglomeration using F-continuation condition.Transition count delta: 9
Deduced a syphon composed of 9 places in 0 ms
Reduce places removed 9 places and 0 transitions.
Iterating global reduction 1 with 18 rules applied. Total rules applied 23 place count 27 transition count 53
Drop transitions (Empty/Sink Transition effects.) removed 8 transitions
Reduce isomorphic transitions removed 8 transitions.
Graph (complete) has 82 edges and 27 vertex of which 26 are kept as prefixes of interest. Removing 1 places using SCC suffix rule.0 ms
Discarding 1 places :
Also discarding 0 output transitions
Iterating post reduction 1 with 9 rules applied. Total rules applied 32 place count 26 transition count 45
Drop transitions (Empty/Sink Transition effects.) removed 1 transitions
Reduce isomorphic transitions removed 1 transitions.
Iterating post reduction 2 with 1 rules applied. Total rules applied 33 place count 26 transition count 44
Performed 5 Post agglomeration using F-continuation condition.Transition count delta: -6
Deduced a syphon composed of 5 places in 0 ms
Reduce places removed 5 places and 0 transitions.
Iterating global reduction 3 with 10 rules applied. Total rules applied 43 place count 21 transition count 50
Drop transitions (Empty/Sink Transition effects.) removed 10 transitions
Reduce isomorphic transitions removed 10 transitions.
Iterating post reduction 3 with 10 rules applied. Total rules applied 53 place count 21 transition count 40
Drop transitions (Redundant composition of simpler transitions.) removed 5 transitions
Redundant transition composition rules discarded 5 transitions
Iterating global reduction 4 with 5 rules applied. Total rules applied 58 place count 21 transition count 35
Free-agglomeration rule (complex) applied 4 times.
Iterating global reduction 4 with 4 rules applied. Total rules applied 62 place count 21 transition count 31
Reduce places removed 4 places and 0 transitions.
Drop transitions (Empty/Sink Transition effects.) removed 2 transitions
Reduce isomorphic transitions removed 2 transitions.
Iterating post reduction 4 with 6 rules applied. Total rules applied 68 place count 17 transition count 29
Drop transitions (Redundant composition of simpler transitions.) removed 1 transitions
Redundant transition composition rules discarded 1 transitions
Iterating global reduction 5 with 1 rules applied. Total rules applied 69 place count 17 transition count 28
Partial Free-agglomeration rule applied 1 times.
Drop transitions (Partial Free agglomeration) removed 1 transitions
Iterating global reduction 5 with 1 rules applied. Total rules applied 70 place count 17 transition count 28
Partial Post-agglomeration rule applied 1 times.
Drop transitions (Partial Post agglomeration) removed 1 transitions
Iterating global reduction 5 with 1 rules applied. Total rules applied 71 place count 17 transition count 28
Applied a total of 71 rules in 42 ms. Remains 17 /39 variables (removed 22) and now considering 28/64 (removed 36) transitions.
Finished structural reductions in REACHABILITY mode , in 1 iterations and 50 ms. Remains : 17/39 places, 28/64 transitions.
[2025-05-29 22:39:48] [INFO ] Flow matrix only has 27 transitions (discarded 1 similar events)
// Phase 1: matrix 27 rows 17 cols
[2025-05-29 22:39:48] [INFO ] Computed 6 invariants in 1 ms
Current structural bounds on expressions (after invariants) : Max Seen:[5, 9] Max Struct:[5, 10]
FORMULA Angiogenesis-PT-10-UpperBounds-07 5 TECHNIQUES TOPOLOGICAL INITIAL_STATE
RANDOM walk for 1000006 steps (2 resets) in 358 ms. (2785 steps per ms)
BEST_FIRST walk for 1000000 steps (2 resets) in 369 ms. (2702 steps per ms)
Current structural bounds on expressions (after WALK) : Max Seen:[9] Max Struct:[10]
[2025-05-29 22:39:48] [INFO ] Flow matrix only has 27 transitions (discarded 1 similar events)
[2025-05-29 22:39:48] [INFO ] Invariant cache hit.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2025-05-29 22:39:48] [INFO ] [Real]Absence check using 6 positive place invariants in 1 ms returned sat
[2025-05-29 22:39:48] [INFO ] [Real]Absence check using state equation in 6 ms returned sat
[2025-05-29 22:39:48] [INFO ] State equation strengthened by 1 read => feed constraints.
[2025-05-29 22:39:48] [INFO ] [Real]Added 1 Read/Feed constraints in 1 ms returned sat
[2025-05-29 22:39:48] [INFO ] Solution in real domain found non-integer solution.
Starting Z3 with timeout 45.0 s and query timeout 4500.0 ms
[2025-05-29 22:39:48] [INFO ] [Nat]Absence check using 6 positive place invariants in 2 ms returned sat
[2025-05-29 22:39:48] [INFO ] [Nat]Absence check using state equation in 8 ms returned sat
[2025-05-29 22:39:48] [INFO ] [Nat]Added 1 Read/Feed constraints in 1 ms returned sat
Starting Z3 with timeout 120.0 s and query timeout 12000.0 ms
[2025-05-29 22:39:48] [INFO ] Deduced a trap composed of 9 places in 30 ms of which 1 ms to minimize.
[2025-05-29 22:39:48] [INFO ] Trap strengthening procedure managed to obtain unsat after adding 1 trap constraints in 34 ms
Current structural bounds on expressions (after SMT) : Max Seen:[9] Max Struct:[9]
FORMULA Angiogenesis-PT-10-UpperBounds-08 9 TECHNIQUES TOPOLOGICAL SAT_SMT RANDOM_WALK
Current structural bounds on expressions (After Parikh guided walk) : Max Seen:[] Max Struct:[]
RANDOM walk for 0 steps (0 resets) in 4 ms. (0 steps per ms) remains 0/0 properties
Finished probabilistic random walk after 0 steps, run visited all 0 properties in 0 ms. (steps per millisecond=0 )
[2025-05-29 22:39:49] [INFO ] Flatten gal took : 22 ms
[2025-05-29 22:39:49] [INFO ] Flatten gal took : 5 ms
[2025-05-29 22:39:49] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality6159387329691112362.gal : 4 ms
[2025-05-29 22:39:49] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality12012453434354910171.prop : 0 ms
Invoking ITS tools like this :cd /home/mcc/execution;'/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64' '--gc-threshold' '2000000' '--quiet' '-i' '/tmp/ReachabilityCardinality6159387329691112362.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality12012453434354910171.prop' '--nowitness' '--gen-order' 'FOLLOW'

ITS runner timed out or was interrupted.
ITS tools runner thread asked to quit. Dying gracefully.
Current structural bounds on expressions (After reachability solving 0 queries.) : Max Seen:[] Max Struct:[]
All properties solved without resorting to model-checking.
Total runtime 2249 ms.

BK_STOP 1748558389244

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

+ export BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
+ BINDIR=/home/mcc/BenchKit/bin//../itstools/bin//../
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ [[ UpperBounds = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution UpperBounds -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
++ sed s/.jar//
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202505121319.jar
++ perl -pe 's/.*\.//g'
+ VERSION=202505121319
+ echo 'Running Version 202505121319'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination UpperBounds -its -ltsmin -greatspnpath /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/ -order META -manyOrder -smt -timeout 3600

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="Angiogenesis-PT-10"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="itstools"
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 2-5832"
echo " Executing tool itstools"
echo " Input is Angiogenesis-PT-10, 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 r002-tall-174853728900237"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/Angiogenesis-PT-10.tgz
mv Angiogenesis-PT-10 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.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 ;