Execution Chart

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

Trace from the execution

Formatting '/data/fkordon/mcc2025-input.r212-tall-174901994500511.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 SimpleLoadBal-PT-05, examination is ReachabilityFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r212-tall-174901994500511
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 688K
-rw-r--r-- 1 mcc users 8.0K May 29 14:47 CTLCardinality.txt
-rw-r--r-- 1 mcc users 67K May 29 14:47 CTLCardinality.xml
-rw-r--r-- 1 mcc users 9.0K May 29 14:47 CTLFireability.txt
-rw-r--r-- 1 mcc users 66K May 29 14:47 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 29 14:33 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.8K May 29 14:33 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 5.8K May 29 14:47 LTLCardinality.txt
-rw-r--r-- 1 mcc users 33K May 29 14:47 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.2K May 29 14:47 LTLFireability.txt
-rw-r--r-- 1 mcc users 20K May 29 14:47 LTLFireability.xml
-rw-r--r-- 1 mcc users 19K May 29 14:47 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 152K 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 83K May 29 14:47 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.9K May 29 14:47 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.9K May 29 14:47 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 29 14:33 equiv_col
-rw-r--r-- 1 mcc users 3 May 29 14:33 instance
-rw-r--r-- 1 mcc users 6 May 29 14:33 iscolored
-rw-r--r-- 1 mcc users 155K May 29 14:33 model.pnml

--------------------
content from stdout:

=== Data for post analysis generated by BenchKit (invocation template)

The expected result is a vector of booleans
BOOL_VECTOR

echo here is the order used to build the result vector(from xml file)
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-00
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-01
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-02
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-03
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-04
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-05
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-06
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-07
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-08
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-09
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-10
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-11
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-12
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-13
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-14
FORMULA_NAME SimpleLoadBal-PT-05-ReachabilityFireability-2025-15

=== Now, execution of the tool begins

BK_START 1749202960031

Invoking MCC driver with
BK_TOOL=itstools
BK_EXAMINATION=ReachabilityFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=SimpleLoadBal-PT-05
BK_MEMORY_CONFINEMENT=16384
Not applying reductions.
Model is PT
ReachabilityFireability PT
Running Version 202505121319
[2025-06-06 09:42:41] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, ReachabilityFireability, -its, -ltsmin, -greatspnpath, /home/mcc/BenchKit/bin//../itstools/bin//..//greatspn/, -order, META, -manyOrder, -smt, -timeout, 3600]
[2025-06-06 09:42:41] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2025-06-06 09:42:41] [INFO ] Load time of PNML (sax parser for PT used): 72 ms
[2025-06-06 09:42:41] [INFO ] Transformed 59 places.
[2025-06-06 09:42:41] [INFO ] Transformed 180 transitions.
[2025-06-06 09:42:41] [INFO ] Found NUPN structural information;
[2025-06-06 09:42:41] [INFO ] Completing missing partition info from NUPN : creating a component with [P_client_idle_1, P_client_idle_2, P_client_idle_3, P_client_idle_4, P_client_idle_5, P_client_waiting_1, P_client_waiting_2, P_client_waiting_3, P_client_waiting_4, P_client_waiting_5, P_client_request_1, P_client_request_2, P_client_request_3, P_client_request_4, P_client_request_5, P_client_ack_1, P_client_ack_2, P_client_ack_3, P_client_ack_4, P_client_ack_5, P_server_idle_1, P_server_idle_2, P_server_waiting_1, P_server_waiting_2, P_server_processed_1, P_server_processed_2, P_server_notification_1, P_server_notification_2, P_server_notification_ack_1, P_server_notification_ack_2, P_server_request_1_1, P_server_request_1_2, P_server_request_2_1, P_server_request_2_2, P_server_request_3_1, P_server_request_3_2, P_server_request_4_1, P_server_request_4_2, P_server_request_5_1, P_server_request_5_2, P_lb_idle_1, P_lb_routing_1_1, P_lb_routing_1_2, P_lb_routing_1_3, P_lb_routing_1_4, P_lb_routing_1_5, P_lb_balancing_1, P_lb_load_1_0, P_lb_load_1_1, P_lb_load_1_2, P_lb_load_1_3, P_lb_load_1_4, P_lb_load_1_5, P_lb_load_2_0, P_lb_load_2_1, P_lb_load_2_2, P_lb_load_2_3, P_lb_load_2_4, P_lb_load_2_5]
[2025-06-06 09:42:41] [INFO ] Parsed PT model containing 59 places and 180 transitions and 1158 arcs in 167 ms.
Parsed 16 properties from file /home/mcc/execution/ReachabilityFireability.xml in 14 ms.
Working with output stream class java.io.PrintStream
[2025-06-06 09:42:42] [INFO ] Flatten gal took : 101 ms
[2025-06-06 09:42:42] [INFO ] Flatten gal took : 56 ms
RANDOM walk for 40000 steps (8 resets) in 1888 ms. (21 steps per ms) remains 8/16 properties
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-14 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-10 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-09 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-07 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-03 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-02 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-01 TRUE TECHNIQUES TOPOLOGICAL RANDOM_WALK
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-00 FALSE TECHNIQUES TOPOLOGICAL RANDOM_WALK
[2025-06-06 09:42:42] [INFO ] Time to serialize gal into /tmp/ReachabilityCardinality17974423491040811613.gal : 35 ms
[2025-06-06 09:42:42] [INFO ] Time to serialize properties into /tmp/ReachabilityCardinality2448488533770449024.prop : 13 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/ReachabilityCardinality17974423491040811613.gal' '-t' 'CGAL' '-reachable-file' '/tmp/ReachabilityCardinality2448488533770449024.prop' '--nowitness' '--gen-order' 'FOLLOW'

its-reach command run as :

/home/mcc/BenchKit/itstools/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.202505121319/bin/its-reach-linux64 --gc-threshold 2000000 --quiet ...329
Loading property file /tmp/ReachabilityCardinality2448488533770449024.prop.
SDD proceeding with computation,8 properties remain. new max is 4
SDD size :1 after 4
SDD proceeding with computation,8 properties remain. new max is 8
SDD size :4 after 18
SDD proceeding with computation,8 properties remain. new max is 16
SDD size :18 after 58
SDD proceeding with computation,8 properties remain. new max is 32
SDD size :58 after 134
SDD proceeding with computation,8 properties remain. new max is 64
SDD size :134 after 162
SDD proceeding with computation,8 properties remain. new max is 128
SDD size :162 after 356
SDD proceeding with computation,8 properties remain. new max is 256
SDD size :356 after 2184
BEST_FIRST walk for 40003 steps (8 resets) in 575 ms. (69 steps per ms) remains 8/8 properties
SDD proceeding with computation,8 properties remain. new max is 512
SDD size :2184 after 9724
SDD proceeding with computation,8 properties remain. new max is 1024
SDD size :9724 after 18930
BEST_FIRST walk for 40002 steps (8 resets) in 475 ms. (84 steps per ms) remains 8/8 properties
BEST_FIRST walk for 40003 steps (8 resets) in 233 ms. (170 steps per ms) remains 8/8 properties
BEST_FIRST walk for 40002 steps (8 resets) in 111 ms. (357 steps per ms) remains 8/8 properties
BEST_FIRST walk for 40003 steps (8 resets) in 88 ms. (449 steps per ms) remains 8/8 properties
SDD proceeding with computation,8 properties remain. new max is 2048
SDD size :45232 after 94094
BEST_FIRST walk for 40002 steps (8 resets) in 152 ms. (261 steps per ms) remains 8/8 properties
BEST_FIRST walk for 40003 steps (8 resets) in 103 ms. (384 steps per ms) remains 8/8 properties
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
petri\_inst\_inst,116176,0.378303,15488,2,2290,16,35934,14,0,577,29800,0
Total reachable state count : 116176

Verifying 8 reachability properties.
BEST_FIRST walk for 40003 steps (8 resets) in 84 ms. (470 steps per ms) remains 8/8 properties
Invariant property SimpleLoadBal-PT-05-ReachabilityFireability-2025-04 is true.
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-04 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
SimpleLoadBal-PT-05-ReachabilityFireability-2025-04,0,0.386219,15616,1,0,16,35934,14,0,588,29800,0
Reachability property SimpleLoadBal-PT-05-ReachabilityFireability-2025-05 does not hold.
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-05 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : SimpleLoadBal-PT-05-ReachabilityFireability-2025-05

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
SimpleLoadBal-PT-05-ReachabilityFireability-2025-05,0,0.3908,15744,1,0,16,35934,14,0,621,29800,0
Reachability property SimpleLoadBal-PT-05-ReachabilityFireability-2025-06 does not hold.
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-06 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : SimpleLoadBal-PT-05-ReachabilityFireability-2025-06

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
SimpleLoadBal-PT-05-ReachabilityFireability-2025-06,0,0.392917,15744,1,0,16,35934,14,0,635,29800,0
Reachability property SimpleLoadBal-PT-05-ReachabilityFireability-2025-08 does not hold.
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-08 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : SimpleLoadBal-PT-05-ReachabilityFireability-2025-08

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
SimpleLoadBal-PT-05-ReachabilityFireability-2025-08,0,0.393543,15744,1,0,16,35934,14,0,637,29800,0
Reachability property SimpleLoadBal-PT-05-ReachabilityFireability-2025-11 does not hold.
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-11 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : SimpleLoadBal-PT-05-ReachabilityFireability-2025-11

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
SimpleLoadBal-PT-05-ReachabilityFireability-2025-11,0,0.394133,15744,1,0,16,35934,14,0,638,29800,0
Reachability property SimpleLoadBal-PT-05-ReachabilityFireability-2025-12 does not hold.
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-12 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : SimpleLoadBal-PT-05-ReachabilityFireability-2025-12

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
SimpleLoadBal-PT-05-ReachabilityFireability-2025-12,0,0.394683,15744,1,0,16,35934,14,0,639,29800,0
Reachability property SimpleLoadBal-PT-05-ReachabilityFireability-2025-13 does not hold.
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-13 FALSE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING
No reachable states exhibit your property : SimpleLoadBal-PT-05-ReachabilityFireability-2025-13

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
SimpleLoadBal-PT-05-ReachabilityFireability-2025-13,0,0.395603,15744,1,0,16,35934,14,0,640,29800,0
Invariant property SimpleLoadBal-PT-05-ReachabilityFireability-2025-15 is true.
FORMULA SimpleLoadBal-PT-05-ReachabilityFireability-2025-15 TRUE TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL COLLATERAL_PROCESSING

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
SimpleLoadBal-PT-05-ReachabilityFireability-2025-15,0,0.396134,15744,1,0,16,35934,14,0,640,29800,0
ITS tools runner thread asked to quit. Dying gracefully.
[2025-06-06 09:42:42] [INFO ] Flow matrix only has 140 transitions (discarded 40 similar events)
// Phase 1: matrix 140 rows 59 cols
[2025-06-06 09:42:42] [INFO ] Computed 19 invariants in 11 ms
[2025-06-06 09:42:42] [INFO ] State equation strengthened by 55 read => feed constraints.
Excessive predecessor constraint size, skipping predecessor.
Starting Z3 with timeout 5.0 s and query timeout 500.0 ms
After SMT solving in domain Real declared 39/199 variables, and 0 constraints, problems are : Problem set: 1 solved, 0 unsolved in 105 ms.
Refiners :[Domain max(s): 0/59 constraints, Positive P Invariants (semi-flows): 0/16 constraints, Generalized P Invariants (flows): 0/3 constraints, State Equation: 0/59 constraints, ReadFeed: 0/55 constraints, PredecessorRefiner: 0/0 constraints, Known Traps: 0/0 constraints, Known Traps Along Path: 0/0 constraints]
After SMT, in 167ms problems are : Problem set: 1 solved, 0 unsolved
Skipping Parikh replay, no witness traces provided.
All properties solved without resorting to model-checking.
Total runtime 1577 ms.

BK_STOP 1749202962883

--------------------
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
+ [[ ReachabilityFireability = StateSpace ]]
+ /home/mcc/BenchKit/bin//../itstools/bin//..//runeclipse.sh /home/mcc/execution ReachabilityFireability -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//
++ perl -pe 's/.*\.//g'
++ ls /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/plugins/fr.lip6.move.gal.application.pnmcc_1.0.0.202505121319.jar
+ VERSION=202505121319
+ echo 'Running Version 202505121319'
+ /home/mcc/BenchKit/bin//../itstools/bin//..//itstools/its-tools -pnfolder /home/mcc/execution -examination ReachabilityFireability -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="SimpleLoadBal-PT-05"
export BK_EXAMINATION="ReachabilityFireability"
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 SimpleLoadBal-PT-05, 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 r212-tall-174901994500511"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/SimpleLoadBal-PT-05.tgz
mv SimpleLoadBal-PT-05 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.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 '' ReachabilityFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
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 ;