Execution Chart

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

Trace from the execution

Waiting for the VM to be ready (probing ssh)
............................
/home/mcc/execution
total 324K
-rw-r--r-- 1 mcc users 5.0K May 15 18:54 CTLCardinality.txt
-rw-r--r-- 1 mcc users 22K May 15 18:54 CTLCardinality.xml
-rw-r--r-- 1 mcc users 6.5K May 15 18:54 CTLFireability.txt
-rw-r--r-- 1 mcc users 29K May 15 18:54 CTLFireability.xml
-rw-r--r-- 1 mcc users 4.0K May 15 18:50 GenericPropertiesDefinition.xml
-rw-r--r-- 1 mcc users 5.9K May 15 18:50 GenericPropertiesVerdict.xml
-rw-r--r-- 1 mcc users 3.5K May 15 18:54 LTLCardinality.txt
-rw-r--r-- 1 mcc users 13K May 15 18:54 LTLCardinality.xml
-rw-r--r-- 1 mcc users 3.4K May 15 18:54 LTLFireability.txt
-rw-r--r-- 1 mcc users 13K May 15 18:54 LTLFireability.xml
-rw-r--r-- 1 mcc users 5.2K May 15 18:54 ReachabilityCardinality.txt
-rw-r--r-- 1 mcc users 22K May 15 18:54 ReachabilityCardinality.xml
-rw-r--r-- 1 mcc users 112 May 15 18:54 ReachabilityDeadlock.txt
-rw-r--r-- 1 mcc users 350 May 15 18:54 ReachabilityDeadlock.xml
-rw-r--r-- 1 mcc users 8.2K May 15 18:54 ReachabilityFireability.txt
-rw-r--r-- 1 mcc users 34K May 15 18:54 ReachabilityFireability.xml
-rw-r--r-- 1 mcc users 2.0K May 15 18:54 UpperBounds.txt
-rw-r--r-- 1 mcc users 4.3K May 15 18:54 UpperBounds.xml
-rw-r--r-- 1 mcc users 5 May 15 18:50 equiv_col
-rw-r--r-- 1 mcc users 3 May 15 18:50 instance
-rw-r--r-- 1 mcc users 6 May 15 18:50 iscolored
-rw-r--r-- 1 mcc users 87K May 15 18:50 model.pnml
=====================================================================
Generated by BenchKit 2-3637
Executing tool itstoolsl
Input is PhilosophersDyn-PT-03, examination is UpperBounds
Time confinement is 3600 seconds
Memory confinement is 16384 MBytes
Number of cores is 4
Run identifier is r117-csrt-152666477500870
=====================================================================

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

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

The expected result is a vector of positive values
NUM_VECTOR

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

=== Now, execution of the tool begins

BK_START 1527279708812

Invoking ITS tools like this :CommandLine [args=[/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805241334/bin/its-reach-linux64, --gc-threshold, 2000000, --quiet, -i, /home/mcc/execution/UpperBounds.pnml.gal, -t, CGAL, -reachable-file, UpperBounds.prop, --nowitness], workingDir=/home/mcc/execution]

its-reach command run as :

/home/mcc/BenchKit/itstools/plugins/fr.lip6.move.gal.itstools.binaries_1.0.0.201805241334/bin/its-reach-linux64 --gc-threshold 2000000 --quiet -i /home/mcc/execution/UpperBounds.pnml.gal -t CGAL -reachable-file UpperBounds.prop --nowitness
Loading property file UpperBounds.prop.
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-00 with value :HasRight_2+HasRight_1+HasRight_3
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-01 with value :WaitRight_1+WaitRight_2+WaitRight_3
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-02 with value :Forks_1+Forks_2+Forks_3
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-03 with value :HasRight_2+HasRight_1+HasRight_3
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-04 with value :Think_3+Think_2+Think_1
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-05 with value :Outside_3+Outside_2+Outside_1
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-06 with value :WaitRight_1+WaitRight_2+WaitRight_3
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-07 with value :WaitRight_1+WaitRight_2+WaitRight_3
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-08 with value :HasLeft_2
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-09 with value :HasRight_1
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-10 with value :WaitLeft_3
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-11 with value :WaitLeft_3
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-12 with value :Forks_3
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-13 with value :WaitRight_1
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-14 with value :Outside_1
Read [bounds] property : PhilosophersDyn-PT-03-UpperBounds-15 with value :Neighbourhood_3_2
Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn\_PT\_03\_flat,325,0.037901,4700,2,486,5,2123,6,0,220,1608,0
Total reachable state count : 325

Verifying 16 reachability properties.
Min sum of variable value : 0
Maximum sum along a path : 2
Bounds property PhilosophersDyn-PT-03-UpperBounds-00 :0 <= HasRight_2+HasRight_1+HasRight_3 <= 2
FORMULA PhilosophersDyn-PT-03-UpperBounds-00 2 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-00,0,0.03876,4732,1,0,7,2123,9,1,311,1608,4
Min sum of variable value : 0
Maximum sum along a path : 3
Bounds property PhilosophersDyn-PT-03-UpperBounds-01 :0 <= WaitRight_1+WaitRight_2+WaitRight_3 <= 3
FORMULA PhilosophersDyn-PT-03-UpperBounds-01 3 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-01,0,0.03947,4800,1,0,8,2123,10,1,372,1608,5
Min sum of variable value : 0
Maximum sum along a path : 2
Bounds property PhilosophersDyn-PT-03-UpperBounds-02 :0 <= Forks_1+Forks_2+Forks_3 <= 2
FORMULA PhilosophersDyn-PT-03-UpperBounds-02 2 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-02,0,0.040143,4800,1,0,9,2123,11,1,423,1608,6
Min sum of variable value : 0
Maximum sum along a path : 2
Bounds property PhilosophersDyn-PT-03-UpperBounds-03 :0 <= HasRight_2+HasRight_1+HasRight_3 <= 2
FORMULA PhilosophersDyn-PT-03-UpperBounds-03 2 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-03,0,0.040223,4800,1,0,9,2123,11,1,423,1608,6
Min sum of variable value : 0
Maximum sum along a path : 3
Bounds property PhilosophersDyn-PT-03-UpperBounds-04 :0 <= Think_3+Think_2+Think_1 <= 3
FORMULA PhilosophersDyn-PT-03-UpperBounds-04 3 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-04,0,0.040967,4800,1,0,10,2123,12,1,478,1608,7
Min sum of variable value : 0
Maximum sum along a path : 3
Bounds property PhilosophersDyn-PT-03-UpperBounds-05 :0 <= Outside_3+Outside_2+Outside_1 <= 3
FORMULA PhilosophersDyn-PT-03-UpperBounds-05 3 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-05,0,0.041657,4800,1,0,11,2123,13,1,531,1608,8
Min sum of variable value : 0
Maximum sum along a path : 3
Bounds property PhilosophersDyn-PT-03-UpperBounds-06 :0 <= WaitRight_1+WaitRight_2+WaitRight_3 <= 3
FORMULA PhilosophersDyn-PT-03-UpperBounds-06 3 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-06,0,0.041727,4800,1,0,11,2123,13,1,531,1608,8
Min sum of variable value : 0
Maximum sum along a path : 3
Bounds property PhilosophersDyn-PT-03-UpperBounds-07 :0 <= WaitRight_1+WaitRight_2+WaitRight_3 <= 3
FORMULA PhilosophersDyn-PT-03-UpperBounds-07 3 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-07,0,0.041841,4800,1,0,11,2123,13,1,531,1608,8
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property PhilosophersDyn-PT-03-UpperBounds-08 :0 <= HasLeft_2 <= 1
FORMULA PhilosophersDyn-PT-03-UpperBounds-08 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-08,0,0.042399,4800,1,0,12,2123,14,1,574,1608,9
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property PhilosophersDyn-PT-03-UpperBounds-09 :0 <= HasRight_1 <= 1
FORMULA PhilosophersDyn-PT-03-UpperBounds-09 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-09,0,0.042814,4800,1,0,13,2123,15,1,611,1608,10
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property PhilosophersDyn-PT-03-UpperBounds-10 :0 <= WaitLeft_3 <= 1
FORMULA PhilosophersDyn-PT-03-UpperBounds-10 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-10,0,0.042885,4800,1,0,14,2123,16,1,616,1608,11
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property PhilosophersDyn-PT-03-UpperBounds-11 :0 <= WaitLeft_3 <= 1
FORMULA PhilosophersDyn-PT-03-UpperBounds-11 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-11,0,0.042936,4800,1,0,14,2123,16,1,616,1608,11
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property PhilosophersDyn-PT-03-UpperBounds-12 :0 <= Forks_3 <= 1
FORMULA PhilosophersDyn-PT-03-UpperBounds-12 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-12,0,0.043056,4800,1,0,15,2123,17,1,635,1608,12
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property PhilosophersDyn-PT-03-UpperBounds-13 :0 <= WaitRight_1 <= 1
FORMULA PhilosophersDyn-PT-03-UpperBounds-13 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-13,0,0.043284,4800,1,0,16,2123,18,1,660,1608,13
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property PhilosophersDyn-PT-03-UpperBounds-14 :0 <= Outside_1 <= 1
FORMULA PhilosophersDyn-PT-03-UpperBounds-14 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-14,0,0.043591,4800,1,0,17,2123,19,1,687,1608,14
Min sum of variable value : 0
Maximum sum along a path : 1
Bounds property PhilosophersDyn-PT-03-UpperBounds-15 :0 <= Neighbourhood_3_2 <= 1
FORMULA PhilosophersDyn-PT-03-UpperBounds-15 1 TECHNIQUES DECISION_DIAGRAMS TOPOLOGICAL USE_NUPN

Model ,|S| ,Time ,Mem(kb) ,fin. SDD ,fin. DDD ,peak SDD ,peak DDD ,SDD Hom ,SDD cache peak ,DDD Hom ,DDD cachepeak ,SHom cache
PhilosophersDyn-PT-03-UpperBounds-15,0,0.043735,4800,1,0,18,2123,20,1,708,1608,15

BK_STOP 1527279712022

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

+ export BINDIR=/home/mcc/BenchKit/
+ BINDIR=/home/mcc/BenchKit/
++ pwd
+ export MODEL=/home/mcc/execution
+ MODEL=/home/mcc/execution
+ /home/mcc/BenchKit//runeclipse.sh /home/mcc/execution UpperBounds -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -louvain -smt
+ ulimit -s 65536
+ [[ -z '' ]]
+ export LTSMIN_MEM_SIZE=8589934592
+ LTSMIN_MEM_SIZE=8589934592
+ /home/mcc/BenchKit//itstools/its-tools -consoleLog -data /home/mcc/execution/workspace -pnfolder /home/mcc/execution -examination UpperBounds -z3path /home/mcc/BenchKit//z3/bin/z3 -yices2path /home/mcc/BenchKit//yices/bin/yices -its -ltsminpath /home/mcc/BenchKit//lts_install_dir/ -louvain -smt -vmargs -Dosgi.locking=none -Declipse.stateSaveDelayInterval=-1 -Dosgi.configuration.area=/tmp/.eclipse -Xss8m -Xms40m -Xmx8192m -Dfile.encoding=UTF-8 -Dosgi.requiredJavaVersion=1.6
May 25, 2018 8:21:51 PM fr.lip6.move.gal.application.Application start
INFO: Running its-tools with arguments : [-pnfolder, /home/mcc/execution, -examination, UpperBounds, -z3path, /home/mcc/BenchKit//z3/bin/z3, -yices2path, /home/mcc/BenchKit//yices/bin/yices, -its, -ltsminpath, /home/mcc/BenchKit//lts_install_dir/, -louvain, -smt]
May 25, 2018 8:21:51 PM fr.lip6.move.gal.application.MccTranslator transformPNML
INFO: Parsing pnml file : /home/mcc/execution/model.pnml
May 25, 2018 8:21:51 PM fr.lip6.move.gal.nupn.PTNetReader loadFromXML
INFO: Load time of PNML (sax parser for PT used): 49 ms
May 25, 2018 8:21:51 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 30 places.
May 25, 2018 8:21:51 PM fr.lip6.move.gal.pnml.togal.PTGALTransformer handlePage
INFO: Transformed 84 transitions.
May 25, 2018 8:21:51 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/model.pnml.img.gal : 11 ms
May 25, 2018 8:21:51 PM fr.lip6.move.gal.instantiate.GALRewriter flatten
INFO: Flatten gal took : 65 ms
May 25, 2018 8:21:51 PM fr.lip6.move.serialization.SerializationUtil systemToFile
INFO: Time to serialize gal into /home/mcc/execution/UpperBounds.pnml.gal : 3 ms
May 25, 2018 8:21:51 PM fr.lip6.move.serialization.SerializationUtil serializePropertiesForITSTools
INFO: Time to serialize properties into /home/mcc/execution/UpperBounds.prop : 0 ms

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="PhilosophersDyn-PT-03"
export BK_EXAMINATION="UpperBounds"
export BK_TOOL="itstoolsl"
export BK_RESULT_DIR="/tmp/BK_RESULTS/OUTPUTS"
export BK_TIME_CONFINEMENT="3600"
export BK_MEMORY_CONFINEMENT="16384"

# 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

tar xzf /home/mcc/BenchKit/INPUTS/PhilosophersDyn-PT-03.tgz
mv PhilosophersDyn-PT-03 execution
cd execution
pwd
ls -lh

# this is for BenchKit: explicit launching of the test
echo "====================================================================="
echo " Generated by BenchKit 2-3637"
echo " Executing tool itstoolsl"
echo " Input is PhilosophersDyn-PT-03, 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 r117-csrt-152666477500870"
echo "====================================================================="
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.txt" ] ; then
echo "here is the order used to build the result vector(from text file)"
for x in $(grep Property UpperBounds.txt | cut -d ' ' -f 2 | sort -u) ; do
echo "FORMULA_NAME $x"
done
elif [ -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
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 ;