./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loop-invgen/nested6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/loop-invgen/nested6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 b3a725921be8310e882457f7f33c9ff7dbee0bc2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config using search string *Termination*32bit*_Bitvector*.epf No suitable settings file found using Termination*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: ClassCastException: class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator cannot be cast to class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData (de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator and de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @560348e6) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-31 02:45:31,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-31 02:45:31,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-31 02:45:31,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-31 02:45:31,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-31 02:45:31,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-31 02:45:31,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-31 02:45:31,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-31 02:45:31,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-31 02:45:31,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-31 02:45:31,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-31 02:45:31,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-31 02:45:31,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-31 02:45:31,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-31 02:45:31,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-31 02:45:31,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-31 02:45:31,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-31 02:45:31,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-31 02:45:31,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-31 02:45:31,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-31 02:45:31,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-31 02:45:31,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-31 02:45:31,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-31 02:45:31,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-31 02:45:32,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-31 02:45:32,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-31 02:45:32,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-31 02:45:32,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-31 02:45:32,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-31 02:45:32,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-31 02:45:32,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-31 02:45:32,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-31 02:45:32,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-31 02:45:32,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-31 02:45:32,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-31 02:45:32,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-31 02:45:32,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-31 02:45:32,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-31 02:45:32,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-31 02:45:32,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-31 02:45:32,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-31 02:45:32,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-31 02:45:32,037 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-31 02:45:32,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-31 02:45:32,038 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-31 02:45:32,038 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-31 02:45:32,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-31 02:45:32,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-31 02:45:32,039 INFO L138 SettingsManager]: * Use SBE=true [2021-08-31 02:45:32,039 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-31 02:45:32,039 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-31 02:45:32,040 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-31 02:45:32,040 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-31 02:45:32,040 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-31 02:45:32,040 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-31 02:45:32,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-31 02:45:32,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-31 02:45:32,042 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-31 02:45:32,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-31 02:45:32,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-31 02:45:32,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-31 02:45:32,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-31 02:45:32,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-31 02:45:32,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-31 02:45:32,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-31 02:45:32,043 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-31 02:45:32,043 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2021-08-31 02:45:32,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-31 02:45:32,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-31 02:45:32,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-31 02:45:32,360 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-31 02:45:32,360 INFO L275 PluginConnector]: CDTParser initialized [2021-08-31 02:45:32,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested6.i [2021-08-31 02:45:32,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19d0e6ee0/5670424a5581456889291800929ea277/FLAG094b9e82b [2021-08-31 02:45:32,774 INFO L306 CDTParser]: Found 1 translation units. [2021-08-31 02:45:32,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested6.i [2021-08-31 02:45:32,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19d0e6ee0/5670424a5581456889291800929ea277/FLAG094b9e82b [2021-08-31 02:45:32,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19d0e6ee0/5670424a5581456889291800929ea277 [2021-08-31 02:45:32,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-31 02:45:32,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-31 02:45:32,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-31 02:45:32,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-31 02:45:32,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-31 02:45:32,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:32,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74798ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32, skipping insertion in model container [2021-08-31 02:45:32,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:32,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-31 02:45:32,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-31 02:45:32,940 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-08-31 02:45:32,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-31 02:45:32,954 INFO L203 MainTranslator]: Completed pre-run [2021-08-31 02:45:32,968 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-08-31 02:45:32,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-31 02:45:32,984 INFO L208 MainTranslator]: Completed translation [2021-08-31 02:45:32,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32 WrapperNode [2021-08-31 02:45:32,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-31 02:45:32,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-31 02:45:32,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-31 02:45:32,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-31 02:45:33,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-31 02:45:33,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-31 02:45:33,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-31 02:45:33,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-31 02:45:33,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-31 02:45:33,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-31 02:45:33,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-31 02:45:33,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-31 02:45:33,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (1/1) ... [2021-08-31 02:45:33,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:33,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:33,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:33,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-31 02:45:33,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-31 02:45:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-31 02:45:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-31 02:45:33,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-31 02:45:33,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-31 02:45:33,242 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-31 02:45:33,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:45:33 BoogieIcfgContainer [2021-08-31 02:45:33,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-31 02:45:33,244 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-31 02:45:33,244 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-31 02:45:33,246 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-31 02:45:33,247 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-31 02:45:33,247 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 31.08 02:45:32" (1/3) ... [2021-08-31 02:45:33,248 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2a4c1260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 31.08 02:45:33, skipping insertion in model container [2021-08-31 02:45:33,248 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-31 02:45:33,248 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:45:32" (2/3) ... [2021-08-31 02:45:33,249 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2a4c1260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 31.08 02:45:33, skipping insertion in model container [2021-08-31 02:45:33,249 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-31 02:45:33,249 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:45:33" (3/3) ... [2021-08-31 02:45:33,250 INFO L389 chiAutomizerObserver]: Analyzing ICFG nested6.i [2021-08-31 02:45:33,284 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-31 02:45:33,284 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-31 02:45:33,284 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-31 02:45:33,284 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-31 02:45:33,284 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-31 02:45:33,284 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-31 02:45:33,285 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-31 02:45:33,285 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-31 02:45:33,296 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:33,309 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-31 02:45:33,309 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 02:45:33,310 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 02:45:33,313 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-31 02:45:33,314 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-31 02:45:33,314 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-31 02:45:33,314 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:33,317 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-31 02:45:33,317 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 02:45:33,318 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 02:45:33,318 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-31 02:45:33,318 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-31 02:45:33,324 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 12#L-1true havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 20#L28true assume !!(main_~n~0 < 1000000); 9#L29true assume main_~k~0 == main_~n~0; 10#L29-1true main_~i~0 := 0; 22#L33-3true [2021-08-31 02:45:33,324 INFO L793 eck$LassoCheckResult]: Loop: 22#L33-3true assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 13#L34-2true assume !true; 11#L33-2true main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 22#L33-3true [2021-08-31 02:45:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:33,328 INFO L82 PathProgramCache]: Analyzing trace with hash 28695784, now seen corresponding path program 1 times [2021-08-31 02:45:33,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:33,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907211927] [2021-08-31 02:45:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:33,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:33,409 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:33,438 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash 53495, now seen corresponding path program 1 times [2021-08-31 02:45:33,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:33,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726018789] [2021-08-31 02:45:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:33,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:33,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 02:45:33,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726018789] [2021-08-31 02:45:33,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726018789] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-31 02:45:33,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-31 02:45:33,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-31 02:45:33,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128966763] [2021-08-31 02:45:33,505 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-31 02:45:33,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 02:45:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-31 02:45:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-31 02:45:33,525 INFO L87 Difference]: Start difference. First operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 02:45:33,594 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-08-31 02:45:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-31 02:45:33,598 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 28 transitions. [2021-08-31 02:45:33,599 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-08-31 02:45:33,601 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 16 states and 19 transitions. [2021-08-31 02:45:33,601 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2021-08-31 02:45:33,611 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-08-31 02:45:33,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 19 transitions. [2021-08-31 02:45:33,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-31 02:45:33,612 INFO L681 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-08-31 02:45:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 19 transitions. [2021-08-31 02:45:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-31 02:45:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-08-31 02:45:33,643 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-08-31 02:45:33,643 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-08-31 02:45:33,643 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-31 02:45:33,644 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 19 transitions. [2021-08-31 02:45:33,644 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-08-31 02:45:33,644 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 02:45:33,644 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 02:45:33,645 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-31 02:45:33,645 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-31 02:45:33,645 INFO L791 eck$LassoCheckResult]: Stem: 54#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 55#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 62#L28 assume !!(main_~n~0 < 1000000); 58#L29 assume main_~k~0 == main_~n~0; 59#L29-1 main_~i~0 := 0; 60#L33-3 [2021-08-31 02:45:33,645 INFO L793 eck$LassoCheckResult]: Loop: 60#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 63#L34-2 assume !(main_~j~0 < main_~n~0); 61#L33-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 60#L33-3 [2021-08-31 02:45:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:33,646 INFO L82 PathProgramCache]: Analyzing trace with hash 28695784, now seen corresponding path program 2 times [2021-08-31 02:45:33,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:33,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093582353] [2021-08-31 02:45:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:33,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:33,661 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:33,683 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:33,684 INFO L82 PathProgramCache]: Analyzing trace with hash 51883, now seen corresponding path program 1 times [2021-08-31 02:45:33,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:33,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598450118] [2021-08-31 02:45:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:33,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:33,688 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:33,691 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:33,692 INFO L82 PathProgramCache]: Analyzing trace with hash 177631332, now seen corresponding path program 1 times [2021-08-31 02:45:33,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:33,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351363755] [2021-08-31 02:45:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:33,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:33,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 02:45:33,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351363755] [2021-08-31 02:45:33,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351363755] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-31 02:45:33,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-31 02:45:33,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-31 02:45:33,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875885814] [2021-08-31 02:45:33,778 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:33,778 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:33,778 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:33,778 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:33,779 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 02:45:33,779 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:33,779 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:33,779 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:33,779 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration2_Loop [2021-08-31 02:45:33,779 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:33,779 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:33,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:33,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:33,831 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:33,832 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 02:45:33,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:33,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:33,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:33,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-31 02:45:33,837 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 02:45:33,837 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:33,871 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 02:45:33,871 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post5=0} Honda state: {ULTIMATE.start_main_#t~post5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 02:45:33,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:33,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:33,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:33,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:33,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-31 02:45:33,912 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 02:45:33,912 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:33,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-08-31 02:45:33,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:33,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:33,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:34,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-31 02:45:34,038 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 02:45:34,039 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:34,226 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 02:45:34,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-08-31 02:45:34,230 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:34,230 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:34,230 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:34,230 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:34,230 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 02:45:34,231 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:34,231 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:34,231 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:34,231 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration2_Loop [2021-08-31 02:45:34,231 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:34,231 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:34,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:34,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:34,264 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:34,268 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 02:45:34,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:34,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:34,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-31 02:45:34,278 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-31 02:45:34,286 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 02:45:34,286 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 02:45:34,287 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 02:45:34,287 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 02:45:34,287 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 02:45:34,288 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 02:45:34,288 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 02:45:34,305 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 02:45:34,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-08-31 02:45:34,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:34,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:34,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:34,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-31 02:45:34,327 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-31 02:45:34,334 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 02:45:34,334 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 02:45:34,334 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 02:45:34,334 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 02:45:34,334 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 02:45:34,336 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 02:45:34,336 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 02:45:34,344 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 02:45:34,350 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-31 02:45:34,350 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-31 02:45:34,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:34,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:34,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-31 02:45:34,354 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 02:45:34,355 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 02:45:34,355 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 02:45:34,355 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-08-31 02:45:34,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:34,374 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 02:45:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:34,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 02:45:34,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:34,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 02:45:34,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:34,442 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-31 02:45:34,443 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 19 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:34,482 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 19 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 28 states and 36 transitions. Complement of second has 4 states. [2021-08-31 02:45:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-31 02:45:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 19 transitions. [2021-08-31 02:45:34,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 5 letters. Loop has 3 letters. [2021-08-31 02:45:34,486 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:34,486 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 8 letters. Loop has 3 letters. [2021-08-31 02:45:34,486 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:34,486 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 5 letters. Loop has 6 letters. [2021-08-31 02:45:34,486 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:34,487 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 36 transitions. [2021-08-31 02:45:34,487 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-08-31 02:45:34,488 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 27 states and 34 transitions. [2021-08-31 02:45:34,488 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2021-08-31 02:45:34,488 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-08-31 02:45:34,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 34 transitions. [2021-08-31 02:45:34,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 02:45:34,489 INFO L681 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-08-31 02:45:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 34 transitions. [2021-08-31 02:45:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-08-31 02:45:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-08-31 02:45:34,491 INFO L704 BuchiCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-08-31 02:45:34,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 02:45:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-31 02:45:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-31 02:45:34,492 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:34,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 02:45:34,526 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-08-31 02:45:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-31 02:45:34,527 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2021-08-31 02:45:34,528 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2021-08-31 02:45:34,528 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 47 states and 59 transitions. [2021-08-31 02:45:34,528 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-08-31 02:45:34,529 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2021-08-31 02:45:34,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 59 transitions. [2021-08-31 02:45:34,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 02:45:34,529 INFO L681 BuchiCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-08-31 02:45:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 59 transitions. [2021-08-31 02:45:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2021-08-31 02:45:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-08-31 02:45:34,531 INFO L704 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-08-31 02:45:34,531 INFO L587 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-08-31 02:45:34,531 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-31 02:45:34,531 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 34 transitions. [2021-08-31 02:45:34,532 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-08-31 02:45:34,532 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 02:45:34,532 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 02:45:34,532 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-08-31 02:45:34,533 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-31 02:45:34,533 INFO L791 eck$LassoCheckResult]: Stem: 217#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 218#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 228#L28 assume !!(main_~n~0 < 1000000); 223#L29 assume main_~k~0 == main_~n~0; 224#L29-1 main_~i~0 := 0; 225#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 229#L34-2 [2021-08-31 02:45:34,533 INFO L793 eck$LassoCheckResult]: Loop: 229#L34-2 assume !!(main_~j~0 < main_~n~0); 230#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 236#L36-2 assume !(main_~k~0 < main_~n~0); 233#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 229#L34-2 [2021-08-31 02:45:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash 889569326, now seen corresponding path program 1 times [2021-08-31 02:45:34,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:34,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335707651] [2021-08-31 02:45:34,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:34,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:34,541 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:34,549 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:34,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1850251, now seen corresponding path program 1 times [2021-08-31 02:45:34,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:34,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849163957] [2021-08-31 02:45:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:34,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:34,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 02:45:34,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849163957] [2021-08-31 02:45:34,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849163957] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-31 02:45:34,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-31 02:45:34,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-31 02:45:34,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247991429] [2021-08-31 02:45:34,594 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-31 02:45:34,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 02:45:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-31 02:45:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-31 02:45:34,595 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. cyclomatic complexity: 9 Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:34,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 02:45:34,639 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-08-31 02:45:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-31 02:45:34,640 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 36 transitions. [2021-08-31 02:45:34,641 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-08-31 02:45:34,641 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 29 states and 36 transitions. [2021-08-31 02:45:34,641 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2021-08-31 02:45:34,642 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-08-31 02:45:34,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 36 transitions. [2021-08-31 02:45:34,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 02:45:34,642 INFO L681 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-08-31 02:45:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 36 transitions. [2021-08-31 02:45:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-31 02:45:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-08-31 02:45:34,644 INFO L704 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-08-31 02:45:34,644 INFO L587 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-08-31 02:45:34,644 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-31 02:45:34,644 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 36 transitions. [2021-08-31 02:45:34,645 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-08-31 02:45:34,645 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 02:45:34,645 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 02:45:34,645 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-08-31 02:45:34,645 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-08-31 02:45:34,646 INFO L791 eck$LassoCheckResult]: Stem: 282#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 283#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 293#L28 assume !!(main_~n~0 < 1000000); 288#L29 assume main_~k~0 == main_~n~0; 289#L29-1 main_~i~0 := 0; 290#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 294#L34-2 [2021-08-31 02:45:34,646 INFO L793 eck$LassoCheckResult]: Loop: 294#L34-2 assume !!(main_~j~0 < main_~n~0); 295#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 309#L18-3 assume !(0 == __VERIFIER_assert_~cond); 284#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 285#L18-6 assume !(0 == __VERIFIER_assert_~cond); 298#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 294#L34-2 [2021-08-31 02:45:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:34,646 INFO L82 PathProgramCache]: Analyzing trace with hash 889569326, now seen corresponding path program 2 times [2021-08-31 02:45:34,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:34,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301147419] [2021-08-31 02:45:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:34,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:34,652 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:34,658 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:34,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1800992291, now seen corresponding path program 1 times [2021-08-31 02:45:34,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:34,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570194467] [2021-08-31 02:45:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:34,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:34,666 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:34,670 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash 25632912, now seen corresponding path program 1 times [2021-08-31 02:45:34,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:34,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557786096] [2021-08-31 02:45:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:34,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:34,678 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:34,686 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:34,758 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:34,759 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:34,759 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:34,759 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:34,759 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 02:45:34,759 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:34,760 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:34,761 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:34,761 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration4_Loop [2021-08-31 02:45:34,763 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:34,763 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:34,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:34,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:34,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:34,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:34,817 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:34,817 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 02:45:34,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:34,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:34,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:34,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-31 02:45:34,847 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 02:45:34,847 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:34,869 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 02:45:34,869 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post6=0} Honda state: {ULTIMATE.start_main_#t~post6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 02:45:34,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:34,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:34,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:34,889 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:34,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-31 02:45:34,891 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 02:45:34,891 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:34,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:34,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:34,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:34,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:34,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-31 02:45:34,927 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 02:45:34,927 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:35,208 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 02:45:35,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2021-08-31 02:45:35,212 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:35,212 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:35,212 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:35,212 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:35,212 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 02:45:35,212 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:35,212 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:35,213 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:35,213 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration4_Loop [2021-08-31 02:45:35,213 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:35,213 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:35,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,225 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,264 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:35,264 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 02:45:35,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:35,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:35,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:35,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-31 02:45:35,267 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-31 02:45:35,274 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 02:45:35,274 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 02:45:35,274 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 02:45:35,274 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 02:45:35,274 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 02:45:35,275 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 02:45:35,275 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 02:45:35,289 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 02:45:35,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:35,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:35,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:35,309 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:35,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-31 02:45:35,312 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-31 02:45:35,319 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 02:45:35,320 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 02:45:35,320 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 02:45:35,320 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 02:45:35,320 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 02:45:35,321 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 02:45:35,321 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 02:45:35,340 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 02:45:35,353 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-31 02:45:35,353 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-31 02:45:35,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:35,354 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:35,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-31 02:45:35,357 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 02:45:35,357 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 02:45:35,357 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 02:45:35,357 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~j~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] [2021-08-31 02:45:35,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:35,380 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 02:45:35,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 02:45:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 02:45:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:35,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:35,508 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-31 02:45:35,508 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 36 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:35,546 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 36 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 72 states and 91 transitions. Complement of second has 7 states. [2021-08-31 02:45:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-31 02:45:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2021-08-31 02:45:35,550 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 6 letters. Loop has 6 letters. [2021-08-31 02:45:35,550 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:35,550 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 12 letters. Loop has 6 letters. [2021-08-31 02:45:35,551 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:35,551 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 6 letters. Loop has 12 letters. [2021-08-31 02:45:35,551 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:35,552 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 72 states and 91 transitions. [2021-08-31 02:45:35,556 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 13 [2021-08-31 02:45:35,559 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 72 states to 57 states and 72 transitions. [2021-08-31 02:45:35,559 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-08-31 02:45:35,559 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2021-08-31 02:45:35,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 72 transitions. [2021-08-31 02:45:35,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 02:45:35,560 INFO L681 BuchiCegarLoop]: Abstraction has 57 states and 72 transitions. [2021-08-31 02:45:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 72 transitions. [2021-08-31 02:45:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-08-31 02:45:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 44 states have (on average 1.25) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-08-31 02:45:35,570 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-08-31 02:45:35,570 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-08-31 02:45:35,570 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-31 02:45:35,570 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2021-08-31 02:45:35,571 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 13 [2021-08-31 02:45:35,571 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 02:45:35,571 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 02:45:35,572 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-31 02:45:35,572 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-31 02:45:35,573 INFO L791 eck$LassoCheckResult]: Stem: 443#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 444#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 454#L28 assume !!(main_~n~0 < 1000000); 449#L29 assume main_~k~0 == main_~n~0; 450#L29-1 main_~i~0 := 0; 451#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 459#L34-2 assume !!(main_~j~0 < main_~n~0); 461#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 464#L36-2 [2021-08-31 02:45:35,574 INFO L793 eck$LassoCheckResult]: Loop: 464#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 465#L18 assume !(0 == __VERIFIER_assert_~cond); 468#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 464#L36-2 [2021-08-31 02:45:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:35,574 INFO L82 PathProgramCache]: Analyzing trace with hash 177631345, now seen corresponding path program 1 times [2021-08-31 02:45:35,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:35,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734910040] [2021-08-31 02:45:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:35,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:35,598 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:35,606 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:35,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:35,611 INFO L82 PathProgramCache]: Analyzing trace with hash 70732, now seen corresponding path program 1 times [2021-08-31 02:45:35,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:35,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7194167] [2021-08-31 02:45:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:35,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:35,617 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:35,624 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:35,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:35,625 INFO L82 PathProgramCache]: Analyzing trace with hash 415731164, now seen corresponding path program 1 times [2021-08-31 02:45:35,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:35,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774482476] [2021-08-31 02:45:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:35,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:35,638 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:35,655 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:35,695 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:35,695 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:35,695 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:35,696 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:35,696 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 02:45:35,696 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:35,696 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:35,696 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:35,696 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration5_Loop [2021-08-31 02:45:35,696 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:35,696 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:35,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,730 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:35,730 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 02:45:35,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:35,732 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:35,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-08-31 02:45:35,734 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 02:45:35,734 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:35,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:35,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:35,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:35,767 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:35,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-31 02:45:35,772 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 02:45:35,772 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:35,906 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 02:45:35,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:35,911 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:35,911 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:35,911 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:35,911 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:35,911 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 02:45:35,911 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:35,911 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:35,911 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:35,911 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration5_Loop [2021-08-31 02:45:35,911 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:35,911 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:35,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:35,949 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:35,949 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 02:45:35,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:35,965 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:35,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-31 02:45:35,981 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-31 02:45:35,987 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 02:45:35,987 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 02:45:35,988 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 02:45:35,988 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 02:45:35,988 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 02:45:35,989 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 02:45:35,989 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 02:45:35,998 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 02:45:36,001 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-31 02:45:36,001 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-31 02:45:36,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:36,002 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:36,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-31 02:45:36,004 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 02:45:36,004 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 02:45:36,004 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 02:45:36,004 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~k~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~k~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] [2021-08-31 02:45:36,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:36,020 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 02:45:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 02:45:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 02:45:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:36,069 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-31 02:45:36,069 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 55 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:36,105 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 44 states and 55 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 133 states and 168 transitions. Complement of second has 7 states. [2021-08-31 02:45:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-31 02:45:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2021-08-31 02:45:36,106 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 8 letters. Loop has 3 letters. [2021-08-31 02:45:36,106 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:36,106 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 11 letters. Loop has 3 letters. [2021-08-31 02:45:36,106 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:36,107 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 8 letters. Loop has 6 letters. [2021-08-31 02:45:36,107 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:36,107 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 168 transitions. [2021-08-31 02:45:36,108 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 25 [2021-08-31 02:45:36,109 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 98 states and 122 transitions. [2021-08-31 02:45:36,109 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2021-08-31 02:45:36,109 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 36 [2021-08-31 02:45:36,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 122 transitions. [2021-08-31 02:45:36,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 02:45:36,110 INFO L681 BuchiCegarLoop]: Abstraction has 98 states and 122 transitions. [2021-08-31 02:45:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states and 122 transitions. [2021-08-31 02:45:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2021-08-31 02:45:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-08-31 02:45:36,114 INFO L704 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-08-31 02:45:36,114 INFO L587 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-08-31 02:45:36,114 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-08-31 02:45:36,114 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 68 states and 84 transitions. [2021-08-31 02:45:36,115 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 19 [2021-08-31 02:45:36,115 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 02:45:36,115 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 02:45:36,115 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-31 02:45:36,115 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-31 02:45:36,116 INFO L791 eck$LassoCheckResult]: Stem: 677#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 678#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 688#L28 assume !!(main_~n~0 < 1000000); 683#L29 assume main_~k~0 == main_~n~0; 684#L29-1 main_~i~0 := 0; 685#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 689#L34-2 assume !!(main_~j~0 < main_~n~0); 690#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 731#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 740#L18 assume !(0 == __VERIFIER_assert_~cond); 741#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 739#L36-2 assume !(main_~k~0 < main_~n~0); 707#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 721#L34-2 assume !!(main_~j~0 < main_~n~0); 717#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 705#L36-2 [2021-08-31 02:45:36,116 INFO L793 eck$LassoCheckResult]: Loop: 705#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 744#L18 assume !(0 == __VERIFIER_assert_~cond); 704#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 705#L36-2 [2021-08-31 02:45:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash 745022182, now seen corresponding path program 1 times [2021-08-31 02:45:36,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:36,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887488574] [2021-08-31 02:45:36,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:36,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:36,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 02:45:36,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887488574] [2021-08-31 02:45:36,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887488574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-31 02:45:36,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766257318] [2021-08-31 02:45:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:36,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-31 02:45:36,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:36,151 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-31 02:45:36,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-31 02:45:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-31 02:45:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:36,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-31 02:45:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:36,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766257318] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-31 02:45:36,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-31 02:45:36,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-08-31 02:45:36,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031757842] [2021-08-31 02:45:36,231 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-31 02:45:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:36,232 INFO L82 PathProgramCache]: Analyzing trace with hash 70732, now seen corresponding path program 2 times [2021-08-31 02:45:36,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:36,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567234072] [2021-08-31 02:45:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:36,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:36,236 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:36,239 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:36,264 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:36,264 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:36,264 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:36,264 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:36,264 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 02:45:36,264 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:36,265 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:36,265 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:36,265 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration6_Loop [2021-08-31 02:45:36,265 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:36,265 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:36,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:36,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:36,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:36,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-08-31 02:45:36,320 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:36,321 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 02:45:36,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:36,322 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:36,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-31 02:45:36,324 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 02:45:36,324 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:36,345 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 02:45:36,346 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Honda state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 02:45:36,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:36,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:36,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:36,363 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:36,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-08-31 02:45:36,365 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 02:45:36,365 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:36,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-08-31 02:45:36,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:36,400 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:36,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-08-31 02:45:36,402 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 02:45:36,402 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:36,543 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 02:45:36,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:36,547 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:36,547 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:36,547 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:36,547 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:36,547 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 02:45:36,547 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:36,547 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:36,547 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:36,547 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration6_Loop [2021-08-31 02:45:36,547 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:36,547 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:36,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:36,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:36,556 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:36,582 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:36,582 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 02:45:36,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:36,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:36,583 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:36,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-08-31 02:45:36,590 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-31 02:45:36,597 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 02:45:36,597 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 02:45:36,597 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 02:45:36,597 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 02:45:36,598 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 02:45:36,599 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 02:45:36,599 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 02:45:36,600 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 02:45:36,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:36,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:36,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:36,620 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:36,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-08-31 02:45:36,622 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-31 02:45:36,628 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 02:45:36,629 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 02:45:36,629 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 02:45:36,629 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 02:45:36,629 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 02:45:36,640 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 02:45:36,640 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 02:45:36,643 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 02:45:36,648 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-31 02:45:36,648 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-31 02:45:36,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:36,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:36,649 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:36,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-08-31 02:45:36,652 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 02:45:36,652 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 02:45:36,652 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 02:45:36,652 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~k~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~k~0 Supporting invariants [] [2021-08-31 02:45:36,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:36,671 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 02:45:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 02:45:36,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 02:45:36,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:36,764 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-31 02:45:36,764 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:36,807 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 126 states and 158 transitions. Complement of second has 7 states. [2021-08-31 02:45:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-31 02:45:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2021-08-31 02:45:36,810 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 15 letters. Loop has 3 letters. [2021-08-31 02:45:36,810 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:36,810 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-31 02:45:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 02:45:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 02:45:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:36,879 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-31 02:45:36,879 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:36,912 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 126 states and 158 transitions. Complement of second has 7 states. [2021-08-31 02:45:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-31 02:45:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2021-08-31 02:45:36,914 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 15 letters. Loop has 3 letters. [2021-08-31 02:45:36,914 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:36,914 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-31 02:45:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 02:45:36,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:36,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 02:45:36,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:36,979 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-31 02:45:36,979 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:37,017 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 102 states and 129 transitions. Complement of second has 6 states. [2021-08-31 02:45:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-31 02:45:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2021-08-31 02:45:37,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 3 letters. [2021-08-31 02:45:37,018 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:37,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 18 letters. Loop has 3 letters. [2021-08-31 02:45:37,018 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:37,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 6 letters. [2021-08-31 02:45:37,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:37,019 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 102 states and 129 transitions. [2021-08-31 02:45:37,020 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2021-08-31 02:45:37,020 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 102 states to 48 states and 59 transitions. [2021-08-31 02:45:37,020 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-08-31 02:45:37,020 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-08-31 02:45:37,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 59 transitions. [2021-08-31 02:45:37,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 02:45:37,021 INFO L681 BuchiCegarLoop]: Abstraction has 48 states and 59 transitions. [2021-08-31 02:45:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 59 transitions. [2021-08-31 02:45:37,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2021-08-31 02:45:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-08-31 02:45:37,022 INFO L704 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-08-31 02:45:37,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 02:45:37,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-31 02:45:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-31 02:45:37,023 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 02:45:37,066 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-08-31 02:45:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-31 02:45:37,066 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 53 transitions. [2021-08-31 02:45:37,067 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 15 [2021-08-31 02:45:37,067 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 43 states and 51 transitions. [2021-08-31 02:45:37,067 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-08-31 02:45:37,067 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-08-31 02:45:37,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 51 transitions. [2021-08-31 02:45:37,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 02:45:37,068 INFO L681 BuchiCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-08-31 02:45:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states and 51 transitions. [2021-08-31 02:45:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2021-08-31 02:45:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-08-31 02:45:37,070 INFO L704 BuchiCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-08-31 02:45:37,070 INFO L587 BuchiCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-08-31 02:45:37,070 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-08-31 02:45:37,070 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 44 transitions. [2021-08-31 02:45:37,070 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2021-08-31 02:45:37,070 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 02:45:37,070 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 02:45:37,071 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-31 02:45:37,071 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-08-31 02:45:37,071 INFO L791 eck$LassoCheckResult]: Stem: 1466#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 1467#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1477#L28 assume !!(main_~n~0 < 1000000); 1472#L29 assume main_~k~0 == main_~n~0; 1473#L29-1 main_~i~0 := 0; 1474#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 1494#L34-2 assume !!(main_~j~0 < main_~n~0); 1495#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1493#L18-3 assume !(0 == __VERIFIER_assert_~cond); 1470#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1471#L18-6 assume !(0 == __VERIFIER_assert_~cond); 1482#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 1483#L34-2 assume !(main_~j~0 < main_~n~0); 1475#L33-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 1476#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 1478#L34-2 [2021-08-31 02:45:37,071 INFO L793 eck$LassoCheckResult]: Loop: 1478#L34-2 assume !!(main_~j~0 < main_~n~0); 1479#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1492#L18-3 assume !(0 == __VERIFIER_assert_~cond); 1468#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1469#L18-6 assume !(0 == __VERIFIER_assert_~cond); 1481#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 1478#L34-2 [2021-08-31 02:45:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:37,071 INFO L82 PathProgramCache]: Analyzing trace with hash -874067824, now seen corresponding path program 1 times [2021-08-31 02:45:37,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:37,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245732546] [2021-08-31 02:45:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:37,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:37,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 02:45:37,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245732546] [2021-08-31 02:45:37,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245732546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-31 02:45:37,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870869135] [2021-08-31 02:45:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:37,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-31 02:45:37,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:37,129 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-31 02:45:37,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-31 02:45:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:37,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-31 02:45:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:37,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:37,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-31 02:45:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:37,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870869135] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-31 02:45:37,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-31 02:45:37,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-08-31 02:45:37,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971871626] [2021-08-31 02:45:37,322 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-31 02:45:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:37,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1800992291, now seen corresponding path program 2 times [2021-08-31 02:45:37,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 02:45:37,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28809319] [2021-08-31 02:45:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 02:45:37,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 02:45:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:37,333 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 02:45:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 02:45:37,342 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 02:45:37,394 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:37,394 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:37,394 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:37,394 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:37,394 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 02:45:37,395 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:37,395 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:37,395 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:37,395 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration7_Loop [2021-08-31 02:45:37,395 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:37,395 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:37,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:37,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:37,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:37,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:37,446 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:37,447 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 02:45:37,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:37,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:37,461 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:37,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-08-31 02:45:37,490 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 02:45:37,490 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:37,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:37,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:37,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:37,532 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:37,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-08-31 02:45:37,533 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 02:45:37,533 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 02:45:37,830 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 02:45:37,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:37,835 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 02:45:37,835 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 02:45:37,835 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 02:45:37,835 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 02:45:37,835 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 02:45:37,835 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:37,835 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 02:45:37,835 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 02:45:37,835 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration7_Loop [2021-08-31 02:45:37,835 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 02:45:37,835 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 02:45:37,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:37,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:37,853 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:37,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 02:45:37,881 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 02:45:37,881 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 02:45:37,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:37,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:37,882 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:37,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-08-31 02:45:37,884 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-31 02:45:37,890 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 02:45:37,890 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 02:45:37,890 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 02:45:37,890 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 02:45:37,890 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 02:45:37,891 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 02:45:37,891 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 02:45:37,905 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 02:45:37,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:37,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:37,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:37,921 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:37,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-08-31 02:45:37,923 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-31 02:45:37,929 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 02:45:37,930 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 02:45:37,930 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 02:45:37,930 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 02:45:37,930 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 02:45:37,931 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 02:45:37,931 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 02:45:37,945 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 02:45:37,947 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-31 02:45:37,947 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-31 02:45:37,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 02:45:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 02:45:37,948 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 02:45:37,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-08-31 02:45:37,950 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 02:45:37,950 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 02:45:37,950 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 02:45:37,950 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-08-31 02:45:37,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:37,968 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 02:45:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:37,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 02:45:37,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 02:45:38,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:38,056 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-31 02:45:38,056 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:38,081 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 69 states and 85 transitions. Complement of second has 7 states. [2021-08-31 02:45:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-31 02:45:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2021-08-31 02:45:38,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 15 letters. Loop has 6 letters. [2021-08-31 02:45:38,083 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:38,083 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-31 02:45:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:38,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 02:45:38,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:38,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 02:45:38,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:38,147 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-31 02:45:38,148 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:38,164 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 69 states and 85 transitions. Complement of second has 7 states. [2021-08-31 02:45:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-31 02:45:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2021-08-31 02:45:38,165 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 15 letters. Loop has 6 letters. [2021-08-31 02:45:38,165 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:38,165 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-31 02:45:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 02:45:38,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 02:45:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 02:45:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 02:45:38,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 02:45:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 02:45:38,259 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-31 02:45:38,259 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:38,288 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 65 states and 79 transitions. Complement of second has 6 states. [2021-08-31 02:45:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-31 02:45:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2021-08-31 02:45:38,289 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 6 letters. [2021-08-31 02:45:38,290 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:38,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 21 letters. Loop has 6 letters. [2021-08-31 02:45:38,290 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:38,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 12 letters. [2021-08-31 02:45:38,290 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 02:45:38,291 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 79 transitions. [2021-08-31 02:45:38,291 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-31 02:45:38,291 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 0 states and 0 transitions. [2021-08-31 02:45:38,291 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-31 02:45:38,292 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-31 02:45:38,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-31 02:45:38,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-31 02:45:38,292 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 02:45:38,292 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 02:45:38,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 02:45:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-31 02:45:38,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-31 02:45:38,293 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 02:45:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 02:45:38,293 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-08-31 02:45:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-31 02:45:38,293 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-08-31 02:45:38,293 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-31 02:45:38,294 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-08-31 02:45:38,294 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-31 02:45:38,294 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-31 02:45:38,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-31 02:45:38,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-31 02:45:38,294 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 02:45:38,294 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 02:45:38,294 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 02:45:38,294 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-08-31 02:45:38,295 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-31 02:45:38,295 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-31 02:45:38,295 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-31 02:45:38,297 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer has thrown an exception: java.lang.ClassCastException: class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator cannot be cast to class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData (de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator and de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @560348e6) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoopBenchmark.prettyprintBenchmarkData(BuchiCegarLoopBenchmark.java:178) at de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData.toString(StatisticsData.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerTimingBenchmark.toString(BuchiAutomizerTimingBenchmark.java:44) at de.uni_freiburg.informatik.ultimate.core.lib.results.StatisticsResult.getLongDescription(StatisticsResult.java:58) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.reportResult(BuchiAutomizerObserver.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.doTerminationAnalysis(BuchiAutomizerObserver.java:161) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.finish(BuchiAutomizerObserver.java:398) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-31 02:45:38,300 INFO L158 Benchmark]: Toolchain (without parser) took 5500.44ms. Allocated memory was 54.5MB in the beginning and 121.6MB in the end (delta: 67.1MB). Free memory was 31.6MB in the beginning and 89.4MB in the end (delta: -57.8MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2021-08-31 02:45:38,300 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 54.5MB. Free memory is still 36.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-31 02:45:38,300 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.37ms. Allocated memory was 54.5MB in the beginning and 81.8MB in the end (delta: 27.3MB). Free memory was 31.5MB in the beginning and 65.3MB in the end (delta: -33.8MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-08-31 02:45:38,300 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.76ms. Allocated memory is still 81.8MB. Free memory was 65.3MB in the beginning and 63.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-31 02:45:38,300 INFO L158 Benchmark]: Boogie Preprocessor took 25.14ms. Allocated memory is still 81.8MB. Free memory was 63.6MB in the beginning and 62.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-31 02:45:38,301 INFO L158 Benchmark]: RCFGBuilder took 196.44ms. Allocated memory is still 81.8MB. Free memory was 62.5MB in the beginning and 53.7MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-31 02:45:38,301 INFO L158 Benchmark]: BuchiAutomizer took 5054.47ms. Allocated memory was 81.8MB in the beginning and 121.6MB in the end (delta: 39.8MB). Free memory was 53.7MB in the beginning and 89.4MB in the end (delta: -35.7MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2021-08-31 02:45:38,302 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 54.5MB. Free memory is still 36.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.37ms. Allocated memory was 54.5MB in the beginning and 81.8MB in the end (delta: 27.3MB). Free memory was 31.5MB in the beginning and 65.3MB in the end (delta: -33.8MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.76ms. Allocated memory is still 81.8MB. Free memory was 65.3MB in the beginning and 63.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.14ms. Allocated memory is still 81.8MB. Free memory was 63.6MB in the beginning and 62.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 196.44ms. Allocated memory is still 81.8MB. Free memory was 62.5MB in the beginning and 53.7MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 5054.47ms. Allocated memory was 81.8MB in the beginning and 121.6MB in the end (delta: 39.8MB). Free memory was 53.7MB in the beginning and 89.4MB in the end (delta: -35.7MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function n + -1 * i and consists of 3 locations. One deterministic module has affine ranking function n + -1 * j and consists of 4 locations. One deterministic module has affine ranking function n + -1 * k and consists of 4 locations. One nondeterministic module has affine ranking function n + -1 * k and consists of 4 locations. One nondeterministic module has affine ranking function n + -1 * j and consists of 4 locations. 5 modules have a trivial ranking function, the largest among these consists of 15 locations. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - ExceptionOrErrorResult: ClassCastException: class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator cannot be cast to class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData (de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator and de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @560348e6) de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: ClassCastException: class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator cannot be cast to class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData (de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator and de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @560348e6): de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoopBenchmark.prettyprintBenchmarkData(BuchiCegarLoopBenchmark.java:178) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-31 02:45:38,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:38,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-31 02:45:38,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...