fond
Model Checking Contest 2021
11th edition, Paris, France, June 23, 2021
Execution of r170-oct2-162089287100113
Last Updated
Jun 28, 2021

About the Execution of 2020-gold for PolyORBLF-PT-S02J04T08

Execution Summary
Max Memory
Used (MB)
Time wait (ms) CPU Usage (ms) I/O Wait (ms) Computed Result Execution
Status
16239.747 3600000.00 3674832.00 1089.20 FFFFTFFTFTTTFTF? normal

Execution Chart

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

Trace from the execution

Formatting '/data/fko/mcc2021-input.r170-oct2-162089287100113.qcow2', fmt=qcow2 size=4294967296 backing_file=/data/fko/mcc2021-input.qcow2 cluster_size=65536 lazy_refcounts=off refcount_bits=16
Waiting for the VM to be ready (probing ssh)
...............................................................................................................................................................................................................................
=====================================================================
Generated by BenchKit 2-4028
Executing tool gold2020
Input is PolyORBLF-PT-S02J04T08, examination is LTLCardinality
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r170-oct2-162089287100113
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 2.8M
-rw-r--r-- 1 mcc users 113K May 5 16:58 CTLCardinality.txt
-rw-r--r-- 1 mcc users 496K May 10 09:43 CTLCardinality.xml
-rw-r--r-- 1 mcc users 133K May 5 16:58 CTLFireability.txt
-rw-r--r-- 1 mcc users 665K May 10 09:43 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 6 14:48 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.3K May 6 14:48 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 9.1K Mar 28 16:26 LTLCardinality.txt
-rw-r--r-- 1 mcc users 39K Mar 28 16:26 LTLCardinality.xml
-rw-r--r-- 1 mcc users 6.8K Mar 28 16:27 LTLFireability.txt
-rw-r--r-- 1 mcc users 33K Mar 28 16:27 LTLFireability.xml
-rw-r--r-- 1 mcc users 6.5K Mar 27 09:20 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 24K Mar 27 09:20 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 13K Mar 25 11:53 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 46K Mar 25 11:53 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 3.5K Mar 22 09:16 UpperBounds.txt
-rw-r--r-- 1 mcc users 7.2K Mar 22 09:16 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 5 16:51 equiv_col
-rw-r--r-- 1 mcc users 10 May 5 16:51 instance
-rw-r--r-- 1 mcc users 6 May 5 16:51 iscolored
-rw-r--r-- 1 mcc users 1.2M May 5 16:51 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 PolyORBLF-PT-S02J04T08-00
FORMULA_NAME PolyORBLF-PT-S02J04T08-01
FORMULA_NAME PolyORBLF-PT-S02J04T08-02
FORMULA_NAME PolyORBLF-PT-S02J04T08-03
FORMULA_NAME PolyORBLF-PT-S02J04T08-04
FORMULA_NAME PolyORBLF-PT-S02J04T08-05
FORMULA_NAME PolyORBLF-PT-S02J04T08-06
FORMULA_NAME PolyORBLF-PT-S02J04T08-07
FORMULA_NAME PolyORBLF-PT-S02J04T08-08
FORMULA_NAME PolyORBLF-PT-S02J04T08-09
FORMULA_NAME PolyORBLF-PT-S02J04T08-10
FORMULA_NAME PolyORBLF-PT-S02J04T08-11
FORMULA_NAME PolyORBLF-PT-S02J04T08-12
FORMULA_NAME PolyORBLF-PT-S02J04T08-13
FORMULA_NAME PolyORBLF-PT-S02J04T08-14
FORMULA_NAME PolyORBLF-PT-S02J04T08-15

=== Now, execution of the tool begins

BK_START 1621379542193

bash -c /home/mcc/BenchKit/BenchKit_head.sh 2> STDERR ; echo ; echo -n "BK_STOP " ; date -u +%s%3N
[2021-05-18 23:12:23] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, LTLCardinality, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -timeout, 3600, -rebuildPNML]
[2021-05-18 23:12:23] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2021-05-18 23:12:23] [INFO ] Load time of PNML (sax parser for PT used): 103 ms
[2021-05-18 23:12:23] [INFO ] Transformed 614 places.
[2021-05-18 23:12:23] [INFO ] Transformed 1242 transitions.
[2021-05-18 23:12:23] [INFO ] Parsed PT model containing 614 places and 1242 transitions in 144 ms.
Ensure Unique test removed 128 transitions
Reduce redundant transitions removed 128 transitions.
Parsed 16 properties from file /home/mcc/execution/LTLCardinality.xml in 29 ms.
Working with output stream class java.io.PrintStream
Incomplete random walk after 100000 steps, including 23 resets, run finished after 555 ms. (steps per millisecond=180 ) properties seen :[1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1]
[2021-05-18 23:12:24] [INFO ] Flow matrix only has 1098 transitions (discarded 16 similar events)
// Phase 1: matrix 1098 rows 614 cols
[2021-05-18 23:12:24] [INFO ] Computed 50 place invariants in 46 ms
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive place invariants in 31 ms returned sat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 16 ms returned unsat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive place invariants in 16 ms returned sat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 27 ms returned unsat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive place invariants in 19 ms returned sat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 15 ms returned unsat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive place invariants in 14 ms returned sat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 13 ms returned unsat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive place invariants in 12 ms returned unsat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive place invariants in 10 ms returned unsat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive place invariants in 5 ms returned unsat
[2021-05-18 23:12:24] [INFO ] [Real]Absence check using 16 positive place invariants in 10 ms returned unsat
[2021-05-18 23:12:25] [INFO ] [Real]Absence check using 16 positive place invariants in 15 ms returned sat
[2021-05-18 23:12:25] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 10 ms returned unsat
[2021-05-18 23:12:25] [INFO ] [Real]Absence check using 16 positive place invariants in 13 ms returned sat
[2021-05-18 23:12:25] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 28 ms returned sat
[2021-05-18 23:12:25] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-18 23:12:26] [INFO ] [Real]Absence check using state equation in 1698 ms returned sat
[2021-05-18 23:12:26] [INFO ] Solution in real domain found non-integer solution.
[2021-05-18 23:12:26] [INFO ] [Nat]Absence check using 16 positive place invariants in 18 ms returned sat
[2021-05-18 23:12:26] [INFO ] [Nat]Absence check using 16 positive and 34 generalized place invariants in 28 ms returned sat
[2021-05-18 23:12:26] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-18 23:12:32] [INFO ] [Nat]Absence check using state equation in 5729 ms returned sat
[2021-05-18 23:12:32] [INFO ] State equation strengthened by 104 read => feed constraints.
[2021-05-18 23:12:33] [INFO ] [Nat]Added 104 Read/Feed constraints in 535 ms returned sat
[2021-05-18 23:12:33] [INFO ] Deduced a trap composed of 66 places in 55 ms
[2021-05-18 23:12:33] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 138 ms
[2021-05-18 23:12:33] [INFO ] Computed and/alt/rep : 1112/13950/1096 causal constraints in 83 ms.
[2021-05-18 23:12:41] [INFO ] Added : 30 causal constraints over 6 iterations in 8442 ms. Result :sat
[2021-05-18 23:12:42] [INFO ] Deduced a trap composed of 65 places in 440 ms
[2021-05-18 23:12:42] [INFO ] Deduced a trap composed of 65 places in 136 ms
[2021-05-18 23:12:44] [INFO ] Deduced a trap composed of 303 places in 816 ms
[2021-05-18 23:12:46] [INFO ] SMT solver returned unknown. Retrying;
[2021-05-18 23:12:47] [INFO ] Deduced a trap composed of 2 places in 669 ms
[2021-05-18 23:12:47] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream closed (> (+ s245 s309) 0)") while checking expression at index 9
[2021-05-18 23:12:47] [INFO ] [Real]Absence check using 16 positive place invariants in 20 ms returned sat
[2021-05-18 23:12:47] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 30 ms returned sat
[2021-05-18 23:12:47] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-18 23:12:50] [INFO ] [Real]Absence check using state equation in 2691 ms returned sat
[2021-05-18 23:12:50] [INFO ] Solution in real domain found non-integer solution.
[2021-05-18 23:12:50] [INFO ] [Nat]Absence check using 16 positive place invariants in 18 ms returned sat
[2021-05-18 23:12:50] [INFO ] [Nat]Absence check using 16 positive and 34 generalized place invariants in 37 ms returned sat
[2021-05-18 23:12:50] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-18 23:12:55] [INFO ] [Nat]Absence check using state equation in 4364 ms returned sat
[2021-05-18 23:12:55] [INFO ] [Nat]Added 104 Read/Feed constraints in 709 ms returned sat
[2021-05-18 23:12:55] [INFO ] Deduced a trap composed of 66 places in 58 ms
[2021-05-18 23:12:55] [INFO ] Trap strengthening (SAT) tested/added 2/1 trap constraints in 145 ms
[2021-05-18 23:12:56] [INFO ] Computed and/alt/rep : 1112/13950/1096 causal constraints in 137 ms.
[2021-05-18 23:13:05] [INFO ] Added : 85 causal constraints over 17 iterations in 9741 ms. Result :unknown
[2021-05-18 23:13:05] [INFO ] [Real]Absence check using 16 positive place invariants in 18 ms returned sat
[2021-05-18 23:13:05] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 12 ms returned unsat
[2021-05-18 23:13:05] [INFO ] [Real]Absence check using 16 positive place invariants in 14 ms returned sat
[2021-05-18 23:13:05] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 18 ms returned unsat
[2021-05-18 23:13:05] [INFO ] [Real]Absence check using 16 positive place invariants in 14 ms returned sat
[2021-05-18 23:13:05] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 31 ms returned unsat
[2021-05-18 23:13:05] [INFO ] [Real]Absence check using 16 positive place invariants in 34 ms returned sat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 9 ms returned unsat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive place invariants in 16 ms returned unsat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive place invariants in 14 ms returned sat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 28 ms returned unsat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive place invariants in 42 ms returned sat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 46 ms returned unsat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive place invariants in 13 ms returned sat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 15 ms returned unsat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive place invariants in 8 ms returned unsat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive place invariants in 14 ms returned sat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 27 ms returned unsat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive place invariants in 14 ms returned sat
[2021-05-18 23:13:06] [INFO ] [Real]Absence check using 16 positive and 34 generalized place invariants in 32 ms returned sat
[2021-05-18 23:13:06] [INFO ] [Real]Adding state equation constraints to refine reachable states.
[2021-05-18 23:13:09] [INFO ] [Real]Absence check using state equation in 2362 ms returned sat
[2021-05-18 23:13:09] [INFO ] Solution in real domain found non-integer solution.
[2021-05-18 23:13:09] [INFO ] [Nat]Absence check using 16 positive place invariants in 16 ms returned sat
[2021-05-18 23:13:09] [INFO ] [Nat]Absence check using 16 positive and 34 generalized place invariants in 36 ms returned sat
[2021-05-18 23:13:09] [INFO ] [Nat]Adding state equation constraints to refine reachable states.
[2021-05-18 23:13:11] [INFO ] [Nat]Absence check using state equation in 2443 ms returned sat
[2021-05-18 23:13:12] [INFO ] [Nat]Added 104 Read/Feed constraints in 1275 ms returned sat
[2021-05-18 23:13:13] [INFO ] Computed and/alt/rep : 1112/13950/1096 causal constraints in 104 ms.
[2021-05-18 23:13:21] [INFO ] Added : 80 causal constraints over 16 iterations in 8130 ms. Result :sat
[2021-05-18 23:13:21] [INFO ] Deduced a trap composed of 65 places in 161 ms
[2021-05-18 23:13:22] [INFO ] Deduced a trap composed of 66 places in 145 ms
[2021-05-18 23:13:22] [INFO ] Deduced a trap composed of 65 places in 122 ms
[2021-05-18 23:13:25] [INFO ] SMT solver returned unknown. Retrying;
[2021-05-18 23:13:29] [INFO ] Deduced a trap composed of 2 places in 817 ms
[2021-05-18 23:13:29] [WARNING] SMT solver failed with error :java.lang.RuntimeException: SMT solver raised an error when submitting script. Raised (error "Failed to assert expression: java.io.IOException: Stream closed (> (+ s245 s309) 0)") while checking expression at index 21
Successfully simplified 19 atomic propositions for a total of 21 simplifications.
[2021-05-18 23:13:30] [INFO ] Initial state reduction rules for CTL removed 8 formulas.
[2021-05-18 23:13:30] [INFO ] Flatten gal took : 127 ms
FORMULA PolyORBLF-PT-S02J04T08-13 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA PolyORBLF-PT-S02J04T08-12 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA PolyORBLF-PT-S02J04T08-11 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA PolyORBLF-PT-S02J04T08-10 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA PolyORBLF-PT-S02J04T08-09 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA PolyORBLF-PT-S02J04T08-07 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA PolyORBLF-PT-S02J04T08-05 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA PolyORBLF-PT-S02J04T08-01 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2021-05-18 23:13:30] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
[2021-05-18 23:13:30] [INFO ] Flatten gal took : 97 ms
[2021-05-18 23:13:30] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
FORMULA PolyORBLF-PT-S02J04T08-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2021-05-18 23:13:30] [INFO ] Export to MCC properties in file /home/mcc/execution/LTLCardinality.sr.xml took 17 ms.
[2021-05-18 23:13:30] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml took 22 ms.
info: Time: 3600 - MCC
vrfy: Checking LTLCardinality @ PolyORBLF-PT-S02J04T08 @ 3570 seconds

FORMULA PolyORBLF-PT-S02J04T08-00 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA PolyORBLF-PT-S02J04T08-03 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA PolyORBLF-PT-S02J04T08-04 TRUE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA PolyORBLF-PT-S02J04T08-06 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA PolyORBLF-PT-S02J04T08-08 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT

FORMULA PolyORBLF-PT-S02J04T08-02 FALSE TECHNIQUES COLLATERAL_PROCESSING EXPLICIT TOPOLOGICAL STATE_COMPRESSION STUBBORN_SETS USE_NUPN UNFOLDING_TO_PT
TIME LIMIT: Killed by timeout after 3600 seconds
MemTotal: 16427364 kB
MemFree: 161824 kB
After kill :
MemTotal: 16427364 kB
MemFree: 16327560 kB

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

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="PolyORBLF-PT-S02J04T08"
export BK_EXAMINATION="LTLCardinality"
export BK_TOOL="gold2020"
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 2-4028"
echo " Executing tool gold2020"
echo " Input is PolyORBLF-PT-S02J04T08, examination is LTLCardinality"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r170-oct2-162089287100113"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/PolyORBLF-PT-S02J04T08.tgz
mv PolyORBLF-PT-S02J04T08 execution
cd execution
if [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "UpperBounds" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] || [ "LTLCardinality" = "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 [ "LTLCardinality" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "LTLCardinality" != "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 "LTLCardinality.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property LTLCardinality.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "LTLCardinality.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 '' LTLCardinality.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "LTLCardinality" = "ReachabilityDeadlock" ] || [ "LTLCardinality" = "QuasiLiveness" ] || [ "LTLCardinality" = "StableMarking" ] || [ "LTLCardinality" = "Liveness" ] || [ "LTLCardinality" = "OneSafe" ] ; then
echo "FORMULA_NAME LTLCardinality"
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 ;