./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/loops/nec11.c --full-output --architecture 32bit


--------------------------------------------------------------------------------


Checking for termination
Using default analysis
Version f470102c
Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loops/nec11.c -s /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 956956519a5dd5945389347ef99ef2322ddc4acd
.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Writing output log to file Ultimate.log
Writing human readable error path to file UltimateCounterExample.errorpath
Result:
FALSE(TERM)
--- Real Ultimate output ---
This is Ultimate 0.1.25-f470102
[2019-12-07 18:21:24,150 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-12-07 18:21:24,151 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-12-07 18:21:24,159 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-12-07 18:21:24,159 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-12-07 18:21:24,159 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-12-07 18:21:24,160 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-12-07 18:21:24,162 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-12-07 18:21:24,163 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-12-07 18:21:24,164 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-12-07 18:21:24,164 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-12-07 18:21:24,165 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-12-07 18:21:24,165 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-12-07 18:21:24,166 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-12-07 18:21:24,166 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-12-07 18:21:24,167 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-12-07 18:21:24,168 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-12-07 18:21:24,168 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-12-07 18:21:24,170 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-12-07 18:21:24,172 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-12-07 18:21:24,173 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-12-07 18:21:24,174 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-12-07 18:21:24,174 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-12-07 18:21:24,175 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-12-07 18:21:24,177 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-12-07 18:21:24,177 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-12-07 18:21:24,177 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-12-07 18:21:24,178 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-12-07 18:21:24,178 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-12-07 18:21:24,178 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-12-07 18:21:24,179 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-12-07 18:21:24,179 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-12-07 18:21:24,179 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-12-07 18:21:24,180 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-12-07 18:21:24,180 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-12-07 18:21:24,181 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-12-07 18:21:24,181 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-12-07 18:21:24,181 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-12-07 18:21:24,181 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-12-07 18:21:24,182 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-12-07 18:21:24,182 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-12-07 18:21:24,183 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf
[2019-12-07 18:21:24,194 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-12-07 18:21:24,194 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-12-07 18:21:24,195 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-12-07 18:21:24,195 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-12-07 18:21:24,195 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-12-07 18:21:24,195 INFO  L136        SettingsManager]: Preferences of BuchiAutomizer differ from their defaults:
[2019-12-07 18:21:24,195 INFO  L138        SettingsManager]:  * NCSB implementation=INTSET_LAZY3
[2019-12-07 18:21:24,195 INFO  L138        SettingsManager]:  * Use old map elimination=false
[2019-12-07 18:21:24,195 INFO  L138        SettingsManager]:  * Use external solver (rank synthesis)=false
[2019-12-07 18:21:24,195 INFO  L138        SettingsManager]:  * Use only trivial implications for array writes=true
[2019-12-07 18:21:24,196 INFO  L138        SettingsManager]:  * Rank analysis=LINEAR_WITH_GUESSES
[2019-12-07 18:21:24,196 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-12-07 18:21:24,196 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-12-07 18:21:24,196 INFO  L138        SettingsManager]:  * Check unreachability of error function in SV-COMP mode=false
[2019-12-07 18:21:24,196 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-12-07 18:21:24,196 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-12-07 18:21:24,196 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-12-07 18:21:24,196 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=ASSUME
[2019-12-07 18:21:24,196 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=ASSUME
[2019-12-07 18:21:24,196 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=ASSUME
[2019-12-07 18:21:24,197 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-12-07 18:21:24,197 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-12-07 18:21:24,197 INFO  L138        SettingsManager]:  * Assume nondeterminstic values are in range=false
[2019-12-07 18:21:24,197 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-12-07 18:21:24,197 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=ASSUME
[2019-12-07 18:21:24,197 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-12-07 18:21:24,197 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-12-07 18:21:24,197 INFO  L138        SettingsManager]:  * To the following directory=/home/matthias/ultimate/dump
[2019-12-07 18:21:24,198 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-12-07 18:21:24,198 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-12-07 18:21:24,198 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2019-12-07 18:21:24,198 INFO  L138        SettingsManager]:  * Dump automata to the following directory=/home/matthias/ultimate/dump/auto
[2019-12-07 18:21:24,199 INFO  L136        SettingsManager]: Preferences of IcfgTransformer differ from their defaults:
[2019-12-07 18:21:24,199 INFO  L138        SettingsManager]:  * TransformationType=MODULO_NEIGHBOR
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 956956519a5dd5945389347ef99ef2322ddc4acd
[2019-12-07 18:21:24,300 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-12-07 18:21:24,308 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-12-07 18:21:24,311 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-12-07 18:21:24,312 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-12-07 18:21:24,312 INFO  L275        PluginConnector]: CDTParser initialized
[2019-12-07 18:21:24,312 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/../../sv-benchmarks/c/loops/nec11.c
[2019-12-07 18:21:24,350 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/data/3911f7d2c/be70f86991b3441984e4c6fb2cb09cb9/FLAG9ceabe039
[2019-12-07 18:21:24,810 INFO  L306              CDTParser]: Found 1 translation units.
[2019-12-07 18:21:24,811 INFO  L160              CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/sv-benchmarks/c/loops/nec11.c
[2019-12-07 18:21:24,815 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/data/3911f7d2c/be70f86991b3441984e4c6fb2cb09cb9/FLAG9ceabe039
[2019-12-07 18:21:24,825 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/data/3911f7d2c/be70f86991b3441984e4c6fb2cb09cb9
[2019-12-07 18:21:24,827 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-12-07 18:21:24,828 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2019-12-07 18:21:24,828 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-12-07 18:21:24,828 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-12-07 18:21:24,831 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-12-07 18:21:24,831 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:21:24" (1/1) ...
[2019-12-07 18:21:24,833 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160492d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:24, skipping insertion in model container
[2019-12-07 18:21:24,833 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:21:24" (1/1) ...
[2019-12-07 18:21:24,838 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-12-07 18:21:24,850 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-12-07 18:21:24,956 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-12-07 18:21:24,959 INFO  L203         MainTranslator]: Completed pre-run
[2019-12-07 18:21:25,005 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-12-07 18:21:25,014 INFO  L208         MainTranslator]: Completed translation
[2019-12-07 18:21:25,014 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25 WrapperNode
[2019-12-07 18:21:25,014 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-12-07 18:21:25,015 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-12-07 18:21:25,015 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-12-07 18:21:25,015 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-12-07 18:21:25,021 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
[2019-12-07 18:21:25,024 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
[2019-12-07 18:21:25,036 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-12-07 18:21:25,036 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-12-07 18:21:25,036 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-12-07 18:21:25,036 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-12-07 18:21:25,042 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
[2019-12-07 18:21:25,042 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
[2019-12-07 18:21:25,042 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
[2019-12-07 18:21:25,042 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
[2019-12-07 18:21:25,044 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
[2019-12-07 18:21:25,046 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
[2019-12-07 18:21:25,047 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
[2019-12-07 18:21:25,048 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-12-07 18:21:25,048 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-12-07 18:21:25,048 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-12-07 18:21:25,048 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-12-07 18:21:25,049 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (1/1) ...
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000
[2019-12-07 18:21:25,094 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-12-07 18:21:25,094 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-12-07 18:21:25,185 INFO  L282             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-12-07 18:21:25,185 INFO  L287             CfgBuilder]: Removed 7 assume(true) statements.
[2019-12-07 18:21:25,185 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:21:25 BoogieIcfgContainer
[2019-12-07 18:21:25,186 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-12-07 18:21:25,186 INFO  L113        PluginConnector]: ------------------------BuchiAutomizer----------------------------
[2019-12-07 18:21:25,186 INFO  L271        PluginConnector]: Initializing BuchiAutomizer...
[2019-12-07 18:21:25,188 INFO  L275        PluginConnector]: BuchiAutomizer initialized
[2019-12-07 18:21:25,189 INFO  L99          BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis
[2019-12-07 18:21:25,189 INFO  L185        PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 06:21:24" (1/3) ...
[2019-12-07 18:21:25,189 INFO  L205        PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@236f38af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 06:21:25, skipping insertion in model container
[2019-12-07 18:21:25,189 INFO  L99          BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis
[2019-12-07 18:21:25,189 INFO  L185        PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:21:25" (2/3) ...
[2019-12-07 18:21:25,190 INFO  L205        PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@236f38af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 06:21:25, skipping insertion in model container
[2019-12-07 18:21:25,190 INFO  L99          BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis
[2019-12-07 18:21:25,190 INFO  L185        PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:21:25" (3/3) ...
[2019-12-07 18:21:25,191 INFO  L371   chiAutomizerObserver]: Analyzing ICFG nec11.c
[2019-12-07 18:21:25,220 INFO  L356         BuchiCegarLoop]: Interprodecural is true
[2019-12-07 18:21:25,220 INFO  L357         BuchiCegarLoop]: Hoare is false
[2019-12-07 18:21:25,220 INFO  L358         BuchiCegarLoop]: Compute interpolants for ForwardPredicates
[2019-12-07 18:21:25,220 INFO  L359         BuchiCegarLoop]: Backedges is STRAIGHT_LINE
[2019-12-07 18:21:25,220 INFO  L360         BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-12-07 18:21:25,220 INFO  L361         BuchiCegarLoop]: Difference is false
[2019-12-07 18:21:25,221 INFO  L362         BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-12-07 18:21:25,221 INFO  L365         BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop========
[2019-12-07 18:21:25,229 INFO  L72            BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states.
[2019-12-07 18:21:25,242 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 3
[2019-12-07 18:21:25,242 INFO  L87            BuchiIsEmpty]: Finished buchiIsEmpty Result is false
[2019-12-07 18:21:25,242 INFO  L119           BuchiIsEmpty]: Starting construction of run
[2019-12-07 18:21:25,246 INFO  L849         BuchiCegarLoop]: Counterexample stem histogram [1]
[2019-12-07 18:21:25,246 INFO  L850         BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1]
[2019-12-07 18:21:25,246 INFO  L424         BuchiCegarLoop]: ======== Iteration 1============
[2019-12-07 18:21:25,246 INFO  L72            BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states.
[2019-12-07 18:21:25,247 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 3
[2019-12-07 18:21:25,247 INFO  L87            BuchiIsEmpty]: Finished buchiIsEmpty Result is false
[2019-12-07 18:21:25,247 INFO  L119           BuchiIsEmpty]: Starting construction of run
[2019-12-07 18:21:25,247 INFO  L849         BuchiCegarLoop]: Counterexample stem histogram [1]
[2019-12-07 18:21:25,247 INFO  L850         BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1]
[2019-12-07 18:21:25,252 INFO  L794   eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 7#L19-2true 
[2019-12-07 18:21:25,252 INFO  L796   eck$LassoCheckResult]: Loop: 7#L19-2true assume !!(0 != main_~c~0 % 256); 3#L21true assume 4 == main_~len~0;main_~len~0 := 0; 11#L21-2true assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 7#L19-2true 
[2019-12-07 18:21:25,256 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,256 INFO  L82        PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times
[2019-12-07 18:21:25,262 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,262 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135220305]
[2019-12-07 18:21:25,262 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,312 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,326 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,327 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,327 INFO  L82        PathProgramCache]: Analyzing trace with hash 39821, now seen corresponding path program 1 times
[2019-12-07 18:21:25,327 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,327 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567901488]
[2019-12-07 18:21:25,327 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,338 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,344 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,345 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,345 INFO  L82        PathProgramCache]: Analyzing trace with hash 963342, now seen corresponding path program 1 times
[2019-12-07 18:21:25,345 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,346 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193354190]
[2019-12-07 18:21:25,346 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,350 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 18:21:25,378 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 18:21:25,378 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193354190]
[2019-12-07 18:21:25,378 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-12-07 18:21:25,379 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-12-07 18:21:25,379 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282876297]
[2019-12-07 18:21:25,424 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-12-07 18:21:25,434 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-12-07 18:21:25,434 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-12-07 18:21:25,436 INFO  L87              Difference]: Start difference. First operand 11 states. Second operand 3 states.
[2019-12-07 18:21:25,451 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 18:21:25,451 INFO  L93              Difference]: Finished difference Result 21 states and 22 transitions.
[2019-12-07 18:21:25,451 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-12-07 18:21:25,453 INFO  L82        GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 22 transitions.
[2019-12-07 18:21:25,454 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 4
[2019-12-07 18:21:25,456 INFO  L88        GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 7 states and 8 transitions.
[2019-12-07 18:21:25,457 INFO  L87         BuchiClosureNwa]: Accepting states before buchiClosure: 7
[2019-12-07 18:21:25,457 INFO  L106        BuchiClosureNwa]: Accepting states after buchiClosure: 7
[2019-12-07 18:21:25,458 INFO  L73         IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions.
[2019-12-07 18:21:25,458 INFO  L80         IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2019-12-07 18:21:25,458 INFO  L688         BuchiCegarLoop]: Abstraction has 7 states and 8 transitions.
[2019-12-07 18:21:25,468 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions.
[2019-12-07 18:21:25,473 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6.
[2019-12-07 18:21:25,474 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6 states.
[2019-12-07 18:21:25,474 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions.
[2019-12-07 18:21:25,475 INFO  L711         BuchiCegarLoop]: Abstraction has 6 states and 7 transitions.
[2019-12-07 18:21:25,475 INFO  L591         BuchiCegarLoop]: Abstraction has 6 states and 7 transitions.
[2019-12-07 18:21:25,475 INFO  L424         BuchiCegarLoop]: ======== Iteration 2============
[2019-12-07 18:21:25,475 INFO  L72            BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions.
[2019-12-07 18:21:25,476 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 3
[2019-12-07 18:21:25,476 INFO  L87            BuchiIsEmpty]: Finished buchiIsEmpty Result is false
[2019-12-07 18:21:25,476 INFO  L119           BuchiIsEmpty]: Starting construction of run
[2019-12-07 18:21:25,476 INFO  L849         BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1]
[2019-12-07 18:21:25,476 INFO  L850         BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1]
[2019-12-07 18:21:25,476 INFO  L794   eck$LassoCheckResult]: Stem: 45#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 46#L19-2 assume !!(0 != main_~c~0 % 256); 43#L21 assume !(4 == main_~len~0); 44#L21-2 
[2019-12-07 18:21:25,476 INFO  L796   eck$LassoCheckResult]: Loop: 44#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 47#L19-2 assume !!(0 != main_~c~0 % 256); 48#L21 assume 4 == main_~len~0;main_~len~0 := 0; 44#L21-2 
[2019-12-07 18:21:25,476 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,477 INFO  L82        PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times
[2019-12-07 18:21:25,477 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,477 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792364610]
[2019-12-07 18:21:25,477 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,480 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,482 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,483 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,483 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,483 INFO  L82        PathProgramCache]: Analyzing trace with hash 46451, now seen corresponding path program 2 times
[2019-12-07 18:21:25,483 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,483 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749121098]
[2019-12-07 18:21:25,484 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,487 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,490 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,491 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,492 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,492 INFO  L82        PathProgramCache]: Analyzing trace with hash 925831567, now seen corresponding path program 1 times
[2019-12-07 18:21:25,492 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,492 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422068007]
[2019-12-07 18:21:25,492 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,496 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 18:21:25,508 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 18:21:25,509 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422068007]
[2019-12-07 18:21:25,509 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139808966]
[2019-12-07 18:21:25,509 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 18:21:25,528 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 18:21:25,530 INFO  L264         TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core
[2019-12-07 18:21:25,531 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2019-12-07 18:21:25,540 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 18:21:25,540 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-12-07 18:21:25,540 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2
[2019-12-07 18:21:25,540 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419231201]
[2019-12-07 18:21:25,581 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-12-07 18:21:25,581 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-12-07 18:21:25,581 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-12-07 18:21:25,581 INFO  L87              Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand 4 states.
[2019-12-07 18:21:25,593 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 18:21:25,593 INFO  L93              Difference]: Finished difference Result 10 states and 11 transitions.
[2019-12-07 18:21:25,593 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-12-07 18:21:25,594 INFO  L82        GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions.
[2019-12-07 18:21:25,594 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 7
[2019-12-07 18:21:25,595 INFO  L88        GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions.
[2019-12-07 18:21:25,595 INFO  L87         BuchiClosureNwa]: Accepting states before buchiClosure: 10
[2019-12-07 18:21:25,595 INFO  L106        BuchiClosureNwa]: Accepting states after buchiClosure: 10
[2019-12-07 18:21:25,595 INFO  L73         IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions.
[2019-12-07 18:21:25,595 INFO  L80         IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2019-12-07 18:21:25,595 INFO  L688         BuchiCegarLoop]: Abstraction has 10 states and 11 transitions.
[2019-12-07 18:21:25,595 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions.
[2019-12-07 18:21:25,596 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9.
[2019-12-07 18:21:25,596 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9 states.
[2019-12-07 18:21:25,596 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions.
[2019-12-07 18:21:25,596 INFO  L711         BuchiCegarLoop]: Abstraction has 9 states and 10 transitions.
[2019-12-07 18:21:25,596 INFO  L591         BuchiCegarLoop]: Abstraction has 9 states and 10 transitions.
[2019-12-07 18:21:25,596 INFO  L424         BuchiCegarLoop]: ======== Iteration 3============
[2019-12-07 18:21:25,597 INFO  L72            BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions.
[2019-12-07 18:21:25,597 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 6
[2019-12-07 18:21:25,597 INFO  L87            BuchiIsEmpty]: Finished buchiIsEmpty Result is false
[2019-12-07 18:21:25,597 INFO  L119           BuchiIsEmpty]: Starting construction of run
[2019-12-07 18:21:25,597 INFO  L849         BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1]
[2019-12-07 18:21:25,597 INFO  L850         BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1]
[2019-12-07 18:21:25,597 INFO  L794   eck$LassoCheckResult]: Stem: 85#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 86#L19-2 assume !!(0 != main_~c~0 % 256); 91#L21 assume !(4 == main_~len~0); 88#L21-2 
[2019-12-07 18:21:25,597 INFO  L796   eck$LassoCheckResult]: Loop: 88#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 87#L19-2 assume !!(0 != main_~c~0 % 256); 83#L21 assume !(4 == main_~len~0); 84#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 90#L19-2 assume !!(0 != main_~c~0 % 256); 89#L21 assume 4 == main_~len~0;main_~len~0 := 0; 88#L21-2 
[2019-12-07 18:21:25,598 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,598 INFO  L82        PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 2 times
[2019-12-07 18:21:25,598 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,598 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108215106]
[2019-12-07 18:21:25,598 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,600 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,603 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,604 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,604 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,604 INFO  L82        PathProgramCache]: Analyzing trace with hash 1383897983, now seen corresponding path program 1 times
[2019-12-07 18:21:25,605 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,605 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540116446]
[2019-12-07 18:21:25,605 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,610 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,615 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,617 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,617 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,617 INFO  L82        PathProgramCache]: Analyzing trace with hash -831686173, now seen corresponding path program 2 times
[2019-12-07 18:21:25,617 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,618 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587076274]
[2019-12-07 18:21:25,618 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,623 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 18:21:25,643 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 18:21:25,643 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587076274]
[2019-12-07 18:21:25,643 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677027169]
[2019-12-07 18:21:25,644 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 18:21:25,664 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2019-12-07 18:21:25,664 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-12-07 18:21:25,664 INFO  L264         TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-12-07 18:21:25,665 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2019-12-07 18:21:25,669 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 18:21:25,669 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-12-07 18:21:25,669 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3
[2019-12-07 18:21:25,670 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048430717]
[2019-12-07 18:21:25,706 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-12-07 18:21:25,706 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-12-07 18:21:25,706 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-12-07 18:21:25,706 INFO  L87              Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 5 states.
[2019-12-07 18:21:25,715 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 18:21:25,715 INFO  L93              Difference]: Finished difference Result 13 states and 14 transitions.
[2019-12-07 18:21:25,715 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-12-07 18:21:25,715 INFO  L82        GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions.
[2019-12-07 18:21:25,716 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 10
[2019-12-07 18:21:25,716 INFO  L88        GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions.
[2019-12-07 18:21:25,716 INFO  L87         BuchiClosureNwa]: Accepting states before buchiClosure: 13
[2019-12-07 18:21:25,717 INFO  L106        BuchiClosureNwa]: Accepting states after buchiClosure: 13
[2019-12-07 18:21:25,717 INFO  L73         IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions.
[2019-12-07 18:21:25,717 INFO  L80         IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2019-12-07 18:21:25,717 INFO  L688         BuchiCegarLoop]: Abstraction has 13 states and 14 transitions.
[2019-12-07 18:21:25,717 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions.
[2019-12-07 18:21:25,718 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12.
[2019-12-07 18:21:25,718 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12 states.
[2019-12-07 18:21:25,718 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions.
[2019-12-07 18:21:25,718 INFO  L711         BuchiCegarLoop]: Abstraction has 12 states and 13 transitions.
[2019-12-07 18:21:25,718 INFO  L591         BuchiCegarLoop]: Abstraction has 12 states and 13 transitions.
[2019-12-07 18:21:25,718 INFO  L424         BuchiCegarLoop]: ======== Iteration 4============
[2019-12-07 18:21:25,718 INFO  L72            BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions.
[2019-12-07 18:21:25,719 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 9
[2019-12-07 18:21:25,719 INFO  L87            BuchiIsEmpty]: Finished buchiIsEmpty Result is false
[2019-12-07 18:21:25,719 INFO  L119           BuchiIsEmpty]: Starting construction of run
[2019-12-07 18:21:25,719 INFO  L849         BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1]
[2019-12-07 18:21:25,719 INFO  L850         BuchiCegarLoop]: Counterexample loop histogram [3, 3, 2, 1]
[2019-12-07 18:21:25,719 INFO  L794   eck$LassoCheckResult]: Stem: 141#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 142#L19-2 assume !!(0 != main_~c~0 % 256); 150#L21 assume !(4 == main_~len~0); 145#L21-2 
[2019-12-07 18:21:25,719 INFO  L796   eck$LassoCheckResult]: Loop: 145#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 143#L19-2 assume !!(0 != main_~c~0 % 256); 144#L21 assume !(4 == main_~len~0); 148#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 149#L19-2 assume !!(0 != main_~c~0 % 256); 139#L21 assume !(4 == main_~len~0); 140#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 147#L19-2 assume !!(0 != main_~c~0 % 256); 146#L21 assume 4 == main_~len~0;main_~len~0 := 0; 145#L21-2 
[2019-12-07 18:21:25,720 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,720 INFO  L82        PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 3 times
[2019-12-07 18:21:25,720 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,720 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939120007]
[2019-12-07 18:21:25,720 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,722 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,724 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,724 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,725 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,725 INFO  L82        PathProgramCache]: Analyzing trace with hash 313813491, now seen corresponding path program 2 times
[2019-12-07 18:21:25,725 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,725 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911516729]
[2019-12-07 18:21:25,725 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,730 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,735 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,737 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,737 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,737 INFO  L82        PathProgramCache]: Analyzing trace with hash 903627023, now seen corresponding path program 3 times
[2019-12-07 18:21:25,738 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,738 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909824482]
[2019-12-07 18:21:25,738 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,744 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 18:21:25,770 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 18:21:25,770 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909824482]
[2019-12-07 18:21:25,770 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510935076]
[2019-12-07 18:21:25,770 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 18:21:25,791 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2019-12-07 18:21:25,792 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-12-07 18:21:25,792 INFO  L264         TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core
[2019-12-07 18:21:25,793 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2019-12-07 18:21:25,797 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 18:21:25,797 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-12-07 18:21:25,798 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4
[2019-12-07 18:21:25,798 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132839915]
[2019-12-07 18:21:25,849 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-12-07 18:21:25,849 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-12-07 18:21:25,849 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2019-12-07 18:21:25,849 INFO  L87              Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 6 states.
[2019-12-07 18:21:25,861 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 18:21:25,862 INFO  L93              Difference]: Finished difference Result 16 states and 17 transitions.
[2019-12-07 18:21:25,862 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-12-07 18:21:25,862 INFO  L82        GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 17 transitions.
[2019-12-07 18:21:25,862 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 13
[2019-12-07 18:21:25,863 INFO  L88        GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 16 states and 17 transitions.
[2019-12-07 18:21:25,863 INFO  L87         BuchiClosureNwa]: Accepting states before buchiClosure: 16
[2019-12-07 18:21:25,863 INFO  L106        BuchiClosureNwa]: Accepting states after buchiClosure: 16
[2019-12-07 18:21:25,863 INFO  L73         IsDeterministic]: Start isDeterministic. Operand 16 states and 17 transitions.
[2019-12-07 18:21:25,863 INFO  L80         IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2019-12-07 18:21:25,864 INFO  L688         BuchiCegarLoop]: Abstraction has 16 states and 17 transitions.
[2019-12-07 18:21:25,864 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states and 17 transitions.
[2019-12-07 18:21:25,865 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15.
[2019-12-07 18:21:25,865 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2019-12-07 18:21:25,865 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2019-12-07 18:21:25,865 INFO  L711         BuchiCegarLoop]: Abstraction has 15 states and 16 transitions.
[2019-12-07 18:21:25,866 INFO  L591         BuchiCegarLoop]: Abstraction has 15 states and 16 transitions.
[2019-12-07 18:21:25,866 INFO  L424         BuchiCegarLoop]: ======== Iteration 5============
[2019-12-07 18:21:25,866 INFO  L72            BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 16 transitions.
[2019-12-07 18:21:25,866 INFO  L131   ngComponentsAnalysis]: Automaton has 1 accepting balls. 12
[2019-12-07 18:21:25,866 INFO  L87            BuchiIsEmpty]: Finished buchiIsEmpty Result is false
[2019-12-07 18:21:25,866 INFO  L119           BuchiIsEmpty]: Starting construction of run
[2019-12-07 18:21:25,867 INFO  L849         BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1]
[2019-12-07 18:21:25,867 INFO  L850         BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1]
[2019-12-07 18:21:25,867 INFO  L794   eck$LassoCheckResult]: Stem: 213#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~post1, main_~a~0, main_~len~0, main_~c~0, main_~i~0;havoc main_~a~0;main_~len~0 := 0;main_~c~0 := main_#t~nondet0;havoc main_#t~nondet0;havoc main_~i~0; 214#L19-2 assume !!(0 != main_~c~0 % 256); 211#L21 assume !(4 == main_~len~0); 212#L21-2 
[2019-12-07 18:21:25,867 INFO  L796   eck$LassoCheckResult]: Loop: 212#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 215#L19-2 assume !!(0 != main_~c~0 % 256); 225#L21 assume !(4 == main_~len~0); 224#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 223#L19-2 assume !!(0 != main_~c~0 % 256); 222#L21 assume !(4 == main_~len~0); 221#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 220#L19-2 assume !!(0 != main_~c~0 % 256); 219#L21 assume !(4 == main_~len~0); 217#L21-2 assume 0 <= main_~len~0 && main_~len~0 < 5;main_~a~0 := main_~a~0[main_~len~0 := 0];main_#t~post1 := main_~len~0;main_~len~0 := 1 + main_#t~post1;havoc main_#t~post1; 218#L19-2 assume !!(0 != main_~c~0 % 256); 216#L21 assume 4 == main_~len~0;main_~len~0 := 0; 212#L21-2 
[2019-12-07 18:21:25,867 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,867 INFO  L82        PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 4 times
[2019-12-07 18:21:25,868 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,868 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460068545]
[2019-12-07 18:21:25,868 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,872 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,873 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,873 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,873 INFO  L82        PathProgramCache]: Analyzing trace with hash -1326016769, now seen corresponding path program 3 times
[2019-12-07 18:21:25,873 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,874 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608750195]
[2019-12-07 18:21:25,874 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,886 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,888 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:25,888 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 18:21:25,888 INFO  L82        PathProgramCache]: Analyzing trace with hash -902292893, now seen corresponding path program 4 times
[2019-12-07 18:21:25,889 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-12-07 18:21:25,889 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447503998]
[2019-12-07 18:21:25,889 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 18:21:25,895 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,902 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 18:21:25,904 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2019-12-07 18:21:26,015 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 06:21:26 BoogieIcfgContainer
[2019-12-07 18:21:26,015 INFO  L132        PluginConnector]: ------------------------ END BuchiAutomizer----------------------------
[2019-12-07 18:21:26,016 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2019-12-07 18:21:26,016 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2019-12-07 18:21:26,016 INFO  L275        PluginConnector]: Witness Printer initialized
[2019-12-07 18:21:26,016 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:21:25" (3/4) ...
[2019-12-07 18:21:26,018 INFO  L134         WitnessPrinter]: Generating witness for non-termination counterexample
[2019-12-07 18:21:26,057 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_24184661-83fb-4af8-a06a-52cae7200840/bin/uautomizer/witness.graphml
[2019-12-07 18:21:26,057 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2019-12-07 18:21:26,059 INFO  L168              Benchmark]: Toolchain (without parser) took 1230.91 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 943.4 MB in the beginning and 942.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 97.3 MB. Max. memory is 11.5 GB.
[2019-12-07 18:21:26,059 INFO  L168              Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-12-07 18:21:26,060 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 186.52 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -150.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB.
[2019-12-07 18:21:26,060 INFO  L168              Benchmark]: Boogie Procedure Inliner took 20.91 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-12-07 18:21:26,060 INFO  L168              Benchmark]: Boogie Preprocessor took 11.78 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-12-07 18:21:26,061 INFO  L168              Benchmark]: RCFGBuilder took 137.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB.
[2019-12-07 18:21:26,061 INFO  L168              Benchmark]: BuchiAutomizer took 829.61 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 942.1 MB in the end (delta: 131.6 MB). Peak memory consumption was 131.6 MB. Max. memory is 11.5 GB.
[2019-12-07 18:21:26,061 INFO  L168              Benchmark]: Witness Printer took 41.49 ms. Allocated memory is still 1.1 GB. Free memory is still 942.1 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-12-07 18:21:26,063 INFO  L335   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB.
 * CACSL2BoogieTranslator took 186.52 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.9 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -150.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB.
 * Boogie Procedure Inliner took 20.91 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
 * Boogie Preprocessor took 11.78 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
 * RCFGBuilder took 137.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB.
 * BuchiAutomizer took 829.61 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 942.1 MB in the end (delta: 131.6 MB). Peak memory consumption was 131.6 MB. Max. memory is 11.5 GB.
 * Witness Printer took 41.49 ms. Allocated memory is still 1.1 GB. Free memory is still 942.1 MB. There was no memory consumed. Max. memory is 11.5 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: Constructed decomposition of program
    Your program was decomposed into 4 terminating modules (4 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.4 modules have a trivial ranking function, the largest among these consists of 6 locations. The remainder module has 15 locations.
  - StatisticsResult: Timing statistics
    BüchiAutomizer plugin needed 0.7s and 5 iterations.  TraceHistogramMax:4. Analysis of lassos took 0.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 4. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 4.	Nontrivial modules had stage [0, 0, 0, 0, 0].	InterpolantCoveringCapabilityFinite: 0/0	InterpolantCoveringCapabilityBuchi: 0/0	HoareTripleCheckerStatistics: 18 SDtfs, 17 SDslu, 16 SDs, 0 SdLazy, 30 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time	LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc4 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0	LassoNonterminationAnalysisSatUnbounded: 0	LassoNonterminationAnalysisUnsat: 0	LassoNonterminationAnalysisUnknown: 0	LassoNonterminationAnalysisTime: 0.0s	
  - TerminationAnalysisResult: Nontermination possible
    Buchi Automizer proved that your program is nonterminating for some inputs
  - FixpointNonTerminationResult [Line: 19]: Nontermination argument in form of an infinite program execution.
    Nontermination argument in form of an infinite execution
State at position 0 is
{}
State at position 1 is
{len=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@782c0786=0, \result=0, c=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@7655c93a=0, i=0}
  - StatisticsResult: NonterminationArgumentStatistics
    Fixpoint
  - NonterminatingLassoResult [Line: 21]: Nonterminating execution
    Found a nonterminating execution for the following lasso shaped sequence of statements.
Stem:
[L13]              int a[5];
[L14]              int len=0;
[L15]              _Bool c=__VERIFIER_nondet_bool();
[L16]              int i;
[L19]  COND TRUE   \read(c)
[L21]  COND FALSE  !(len==4)
Loop:
[L24]  EXPR        a[len]
[L24]              a[len]=0
[L26]              len++
[L19]  COND TRUE   \read(c)
[L21]  COND FALSE  !(len==4)
[L24]  EXPR        a[len]
[L24]              a[len]=0
[L26]              len++
[L19]  COND TRUE   \read(c)
[L21]  COND FALSE  !(len==4)
[L24]  EXPR        a[len]
[L24]              a[len]=0
[L26]              len++
[L19]  COND TRUE   \read(c)
[L21]  COND FALSE  !(len==4)
[L24]  EXPR        a[len]
[L24]              a[len]=0
[L26]              len++
[L19]  COND TRUE   \read(c)
[L21]  COND TRUE   len==4
[L22]              len =0
End of lasso representation.
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...