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.r245-tall-171654349700338.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)
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=====================================================================
Generated by BenchKit 2-5568
Executing tool greatspnxred
Input is NQueens-PT-05, examination is CTLFireability
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r245-tall-171654349700338
=====================================================================

--------------------
preparation of the directory to be used:
/home/mcc/execution
total 472K
-rw-r--r-- 1 mcc users 5.0K May 14 13:22 CTLCardinality.txt
-rw-r--r-- 1 mcc users 47K May 14 13:22 CTLCardinality.xml
-rw-r--r-- 1 mcc users 5.3K May 14 13:22 CTLFireability.txt
-rw-r--r-- 1 mcc users 42K May 14 13:22 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.2K May 18 16:43 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 6.5K May 18 16:43 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.5K Apr 23 07:40 LTLCardinality.txt
-rw-r--r-- 1 mcc users 25K Apr 23 07:40 LTLCardinality.xml
-rw-r--r-- 1 mcc users 2.5K Apr 23 07:40 LTLFireability.txt
-rw-r--r-- 1 mcc users 19K Apr 23 07:40 LTLFireability.xml
-rw-r--r-- 1 mcc users 12K Apr 12 03:16 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 129K Apr 12 03:16 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 11K Apr 12 03:16 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 82K Apr 12 03:16 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 1.6K Apr 23 07:40 UpperBounds.txt
-rw-r--r-- 1 mcc users 3.6K Apr 23 07:40 UpperBounds.xml
-rw-r--r-- 1 mcc users 6 May 18 16:43 equiv_col
-rw-r--r-- 1 mcc users 3 May 18 16:43 instance
-rw-r--r-- 1 mcc users 6 May 18 16:43 iscolored
-rw-r--r-- 1 mcc users 30K May 18 16:43 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 NQueens-PT-05-CTLFireability-2024-00
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-01
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-02
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-03
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-04
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-05
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-06
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-07
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-08
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-09
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-10
FORMULA_NAME NQueens-PT-05-CTLFireability-2024-11
FORMULA_NAME NQueens-PT-05-CTLFireability-2023-12
FORMULA_NAME NQueens-PT-05-CTLFireability-2023-13
FORMULA_NAME NQueens-PT-05-CTLFireability-2023-14
FORMULA_NAME NQueens-PT-05-CTLFireability-2023-15

=== Now, execution of the tool begins

BK_START 1716655868168

Invoking MCC driver with
BK_TOOL=greatspnxred
BK_EXAMINATION=CTLFireability
BK_BIN_PATH=/home/mcc/BenchKit/bin/
BK_TIME_CONFINEMENT=3600
BK_INPUT=NQueens-PT-05
BK_MEMORY_CONFINEMENT=16384
Applying reductions before tool greatspn
Invoking reducer
Running Version 202405141337
[2024-05-25 16:51:09] [INFO ] Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, CTLFireability, -timeout, 360, -rebuildPNML]
[2024-05-25 16:51:09] [INFO ] Parsing pnml file : /home/mcc/execution/model.pnml
[2024-05-25 16:51:09] [INFO ] Load time of PNML (sax parser for PT used): 54 ms
[2024-05-25 16:51:09] [INFO ] Transformed 55 places.
[2024-05-25 16:51:09] [INFO ] Transformed 25 transitions.
[2024-05-25 16:51:09] [INFO ] Found NUPN structural information;
[2024-05-25 16:51:09] [INFO ] Parsed PT model containing 55 places and 25 transitions and 125 arcs in 157 ms.
Parsed 16 properties from file /home/mcc/execution/CTLFireability.xml in 13 ms.
Initial state reduction rules removed 4 formulas.
Reduce places removed 2 places and 0 transitions.
FORMULA NQueens-PT-05-CTLFireability-2024-11 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-05-CTLFireability-2023-12 TRUE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-05-CTLFireability-2023-14 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
FORMULA NQueens-PT-05-CTLFireability-2023-15 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Support contains 28 out of 53 places. Attempting structural reductions.
Starting structural reductions in LTL mode, iteration 0 : 53/53 places, 25/25 transitions.
Reduce places removed 25 places and 0 transitions.
Iterating post reduction 0 with 25 rules applied. Total rules applied 25 place count 28 transition count 25
Applied a total of 25 rules in 14 ms. Remains 28 /53 variables (removed 25) and now considering 25/25 (removed 0) transitions.
// Phase 1: matrix 25 rows 28 cols
[2024-05-25 16:51:09] [INFO ] Computed 7 invariants in 7 ms
[2024-05-25 16:51:09] [INFO ] Implicit Places using invariants in 168 ms returned []
[2024-05-25 16:51:09] [INFO ] Invariant cache hit.
[2024-05-25 16:51:09] [INFO ] Implicit Places using invariants and state equation in 62 ms returned []
Implicit Place search using SMT with State Equation took 259 ms to find 0 implicit places.
Running 0 sub problems to find dead transitions.
Search for dead transitions found 0 dead transitions in 2ms
Starting structural reductions in LTL mode, iteration 1 : 28/53 places, 25/25 transitions.
Finished structural reductions in LTL mode , in 1 iterations and 292 ms. Remains : 28/53 places, 25/25 transitions.
Support contains 28 out of 28 places after structural reductions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 21 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 8 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Reduction of identical properties reduced properties to check from 35 to 31
RANDOM walk for 155 steps (29 resets) in 20 ms. (7 steps per ms) remains 0/31 properties
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 5 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 7 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Computed a total of 28 stabilizing places and 25 stable transitions
Complete graph has no SCC; deadlocks are unavoidable. place count 28 transition count 25
Detected that all paths lead to deadlock. Applying this knowledge to assert that all AP eventually converge (and all enablings converge to false).
AF dead knowledge conclusive for 2 formulas.
FORMULA NQueens-PT-05-CTLFireability-2024-07 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
Starting structural reductions in LTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 1 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 1 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 4 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 3 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 3 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Starting structural reductions in LTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 0 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 1 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 2 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Starting structural reductions in LTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 1 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 1 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 2 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 1 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 1 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 4 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 1 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 2 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 2 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Starting structural reductions in LTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 0 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 1 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Initial state reduction rules for CTL removed 1 formulas.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
FORMULA NQueens-PT-05-CTLFireability-2024-06 FALSE TECHNIQUES TOPOLOGICAL INITIAL_STATE
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Support contains 0 out of 28 places (down from 4) after GAL structural reductions.
Starting structural reductions in SI_CTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 1 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 1 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 2 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Starting structural reductions in SI_CTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 1 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in SI_CTL mode , in 1 iterations and 1 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 2 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 2 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Starting structural reductions in LTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 0 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 1 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 2 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
Starting structural reductions in LTL mode, iteration 0 : 28/28 places, 25/25 transitions.
Applied a total of 0 rules in 1 ms. Remains 28 /28 variables (removed 0) and now considering 25/25 (removed 0) transitions.
Finished structural reductions in LTL mode , in 1 iterations and 1 ms. Remains : 28/28 places, 25/25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 2 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 3 ms
[2024-05-25 16:51:10] [INFO ] Input system was already deterministic with 25 transitions.
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 4 ms
[2024-05-25 16:51:10] [INFO ] Flatten gal took : 4 ms
[2024-05-25 16:51:10] [INFO ] Export to MCC of 10 properties in file /home/mcc/execution/CTLFireability.sr.xml took 5 ms.
[2024-05-25 16:51:10] [INFO ] Export to PNML in file /home/mcc/execution/model.sr.pnml of net with 28 places, 25 transitions and 100 arcs took 1 ms.
Total runtime 1197 ms.
There are residual formulas that ITS could not solve within timeout
----------------------------------------------------------------------
GreatSPN-meddly tool, MCC 2023
----------------------------------------------------------------------

Running NQueens-PT-05

IS_COLORED=
IS_NUPN=

LOADING PETRI NET FILE /home/mcc/execution/412/model.pnml (PNML) ...
PNML VERSION 2009, P/T NET.
COLOR CLASSES: 0
CONSTANTS: 0
PLACES: 28
TRANSITIONS: 25
COLOR VARS: 0
MEASURES: 0
LOADING TIME: [User 0.000s, Sys 0.002s]


SAVING FILE /home/mcc/execution/412/model (.net / .def) ...
EXPORT TIME: [User 0.000s, Sys 0.000s]


----------------------------------------------------------------------
GreatSPN/Meddly.
Copyright (C) 1987-2022, University of Torino, Italy.
website: https://github.com/greatspn/SOURCES

Based on MEDDLY version 0.16.0
Copyright (C) 2009, Iowa State University Research Foundation, Inc.
website: http://meddly.sourceforge.net

Process ID: 523
MODEL NAME: /home/mcc/execution/412/model
28 places, 25 transitions.

Creating all event NSFs..
Creating all event NSFs..
Creating all event NSFs..
Split: SplitSubtract
Start RS construction.
Split: SplitSubtract
Start RS construction.
Split: SplitSubtract
Start RS construction.
Building monolithic NSF...
FORMULA NQueens-PT-05-CTLFireability-2024-03 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
FORMULA NQueens-PT-05-CTLFireability-2024-00 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
FORMULA NQueens-PT-05-CTLFireability-2024-01 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
FORMULA NQueens-PT-05-CTLFireability-2024-02 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
FORMULA NQueens-PT-05-CTLFireability-2024-04 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
FORMULA NQueens-PT-05-CTLFireability-2024-08 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
FORMULA NQueens-PT-05-CTLFireability-2024-05 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
FORMULA NQueens-PT-05-CTLFireability-2024-09 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
FORMULA NQueens-PT-05-CTLFireability-2023-13 TRUE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
FORMULA NQueens-PT-05-CTLFireability-2024-10 FALSE TECHNIQUES DECISION_DIAGRAMS PARALLEL_PROCESSING UNFOLDING_TO_PT USE_NUPN TOPOLOGICAL
Ok.
EXITCODE: 0
----------------------------------------------------------------------

BK_STOP 1716655871479

--------------------
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 CTLFireability -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="NQueens-PT-05"
export BK_EXAMINATION="CTLFireability"
export BK_TOOL="greatspnxred"
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 greatspnxred"
echo " Input is NQueens-PT-05, examination is CTLFireability"
echo " Time confinement is $BK_TIME_CONFINEMENT seconds"
echo " Memory confinement is 16384 MBytes"
echo " Number of cores is 4"
echo " Run identifier is r245-tall-171654349700338"
echo "====================================================================="
echo
echo "--------------------"
echo "preparation of the directory to be used:"

tar xzf /home/mcc/BenchKit/INPUTS/NQueens-PT-05.tgz
mv NQueens-PT-05 execution
cd execution
if [ "CTLFireability" = "ReachabilityDeadlock" ] || [ "CTLFireability" = "UpperBounds" ] || [ "CTLFireability" = "QuasiLiveness" ] || [ "CTLFireability" = "StableMarking" ] || [ "CTLFireability" = "Liveness" ] || [ "CTLFireability" = "OneSafe" ] || [ "CTLFireability" = "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 [ "CTLFireability" = "UpperBounds" ] ; then
echo "The expected result is a vector of positive values"
echo NUM_VECTOR
elif [ "CTLFireability" != "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 "CTLFireability.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property CTLFireability.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -f "CTLFireability.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 '' CTLFireability.xml | cut -d '>' -f 2 | cut -d '<' -f 1 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ "CTLFireability" = "ReachabilityDeadlock" ] || [ "CTLFireability" = "QuasiLiveness" ] || [ "CTLFireability" = "StableMarking" ] || [ "CTLFireability" = "Liveness" ] || [ "CTLFireability" = "OneSafe" ] ; then
echo "FORMULA_NAME CTLFireability"
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 ;