./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/a.10.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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/termination-restricted-15/a.10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-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 64bit --witnessprinter.graph.data.programhash 8d0216d6bf8bf4f618f739d27f28d08a28da9c3b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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*64bit*_Bitvector*.epf No suitable settings file found using Termination*64bit*_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 01:32:22,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-31 01:32:22,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-31 01:32:22,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-31 01:32:22,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-31 01:32:22,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-31 01:32:22,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-31 01:32:22,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-31 01:32:22,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-31 01:32:22,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-31 01:32:22,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-31 01:32:22,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-31 01:32:22,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-31 01:32:22,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-31 01:32:22,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-31 01:32:22,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-31 01:32:22,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-31 01:32:22,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-31 01:32:22,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-31 01:32:22,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-31 01:32:22,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-31 01:32:22,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-31 01:32:22,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-31 01:32:22,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-31 01:32:22,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-31 01:32:22,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-31 01:32:22,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-31 01:32:22,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-31 01:32:22,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-31 01:32:22,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-31 01:32:22,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-31 01:32:22,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-31 01:32:22,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-31 01:32:22,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-31 01:32:22,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-31 01:32:22,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-31 01:32:22,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-31 01:32:22,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-31 01:32:22,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-31 01:32:22,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-31 01:32:22,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-31 01:32:22,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-31 01:32:22,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-31 01:32:22,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-31 01:32:22,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-31 01:32:22,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-31 01:32:22,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-31 01:32:22,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-31 01:32:22,729 INFO L138 SettingsManager]: * Use SBE=true [2021-08-31 01:32:22,730 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-31 01:32:22,730 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-31 01:32:22,730 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-31 01:32:22,730 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-31 01:32:22,731 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-31 01:32:22,731 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-31 01:32:22,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-31 01:32:22,731 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-31 01:32:22,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-31 01:32:22,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-31 01:32:22,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-31 01:32:22,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-31 01:32:22,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-31 01:32:22,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-31 01:32:22,732 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-31 01:32:22,732 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-31 01:32:22,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-31 01:32:22,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-31 01:32:22,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-31 01:32:22,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-31 01:32:22,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-31 01:32:22,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-31 01:32:22,734 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-31 01:32:22,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d0216d6bf8bf4f618f739d27f28d08a28da9c3b [2021-08-31 01:32:22,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-31 01:32:23,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-31 01:32:23,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-31 01:32:23,030 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-31 01:32:23,031 INFO L275 PluginConnector]: CDTParser initialized [2021-08-31 01:32:23,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/a.10.c [2021-08-31 01:32:23,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2683a352/c2113c0bf3a24a4080092c91d3ee7565/FLAG724812ed3 [2021-08-31 01:32:23,457 INFO L306 CDTParser]: Found 1 translation units. [2021-08-31 01:32:23,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/a.10.c [2021-08-31 01:32:23,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2683a352/c2113c0bf3a24a4080092c91d3ee7565/FLAG724812ed3 [2021-08-31 01:32:23,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2683a352/c2113c0bf3a24a4080092c91d3ee7565 [2021-08-31 01:32:23,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-31 01:32:23,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-31 01:32:23,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-31 01:32:23,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-31 01:32:23,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-31 01:32:23,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:32:23" (1/1) ... [2021-08-31 01:32:23,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bdfe4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:23, skipping insertion in model container [2021-08-31 01:32:23,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:32:23" (1/1) ... [2021-08-31 01:32:23,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-31 01:32:23,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-31 01:32:24,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-31 01:32:24,016 INFO L203 MainTranslator]: Completed pre-run [2021-08-31 01:32:24,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-31 01:32:24,033 INFO L208 MainTranslator]: Completed translation [2021-08-31 01:32:24,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24 WrapperNode [2021-08-31 01:32:24,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-31 01:32:24,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-31 01:32:24,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-31 01:32:24,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-31 01:32:24,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-31 01:32:24,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-31 01:32:24,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-31 01:32:24,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-31 01:32:24,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-31 01:32:24,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-31 01:32:24,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-31 01:32:24,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-31 01:32:24,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (1/1) ... [2021-08-31 01:32:24,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:24,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:24,122 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 01:32:24,157 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 01:32:24,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-31 01:32:24,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-31 01:32:24,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-31 01:32:24,233 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-31 01:32:24,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:32:24 BoogieIcfgContainer [2021-08-31 01:32:24,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-31 01:32:24,235 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-31 01:32:24,235 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-31 01:32:24,237 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-31 01:32:24,238 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-31 01:32:24,238 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 31.08 01:32:23" (1/3) ... [2021-08-31 01:32:24,239 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2587e9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 31.08 01:32:24, skipping insertion in model container [2021-08-31 01:32:24,239 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-31 01:32:24,239 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:32:24" (2/3) ... [2021-08-31 01:32:24,239 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2587e9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 31.08 01:32:24, skipping insertion in model container [2021-08-31 01:32:24,239 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-31 01:32:24,239 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:32:24" (3/3) ... [2021-08-31 01:32:24,240 INFO L389 chiAutomizerObserver]: Analyzing ICFG a.10.c [2021-08-31 01:32:24,287 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-31 01:32:24,289 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-31 01:32:24,290 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-31 01:32:24,290 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-31 01:32:24,290 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-31 01:32:24,290 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-31 01:32:24,290 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-31 01:32:24,291 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-31 01:32:24,300 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 01:32:24,314 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-31 01:32:24,315 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 01:32:24,315 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 01:32:24,318 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-31 01:32:24,318 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-31 01:32:24,318 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-31 01:32:24,318 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 01:32:24,319 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-31 01:32:24,319 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 01:32:24,319 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 01:32:24,319 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-31 01:32:24,319 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-31 01:32:24,323 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 3#L12-2true [2021-08-31 01:32:24,323 INFO L793 eck$LassoCheckResult]: Loop: 3#L12-2true assume !!!(main_~x~0 == main_~y~0); 8#L12true assume main_~x~0 > main_~y~0;main_~y~0 := 1 + main_~y~0; 3#L12-2true [2021-08-31 01:32:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-08-31 01:32:24,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:24,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986627215] [2021-08-31 01:32:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:24,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:24,421 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:24,432 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:24,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-08-31 01:32:24,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:24,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344538081] [2021-08-31 01:32:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:24,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:24,441 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:24,453 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:24,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:24,457 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-08-31 01:32:24,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:24,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996081141] [2021-08-31 01:32:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:24,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:24,470 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:24,484 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:24,578 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 01:32:24,578 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 01:32:24,578 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 01:32:24,578 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 01:32:24,579 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 01:32:24,579 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:24,579 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 01:32:24,579 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 01:32:24,579 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration1_Loop [2021-08-31 01:32:24,579 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 01:32:24,592 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 01:32:24,602 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 01:32:24,622 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 01:32:24,625 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 01:32:24,688 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 01:32:24,689 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 01:32:24,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:24,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:24,709 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 01:32:24,744 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 01:32:24,745 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 01:32:24,745 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:24,768 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 01:32:24,768 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 01:32:24,794 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 01:32:24,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:24,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:24,796 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 01:32:24,797 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 01:32:24,799 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 01:32:24,799 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:24,822 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 01:32:24,822 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 01:32:24,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-31 01:32:24,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:24,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:24,856 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 01:32:24,857 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 01:32:24,858 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 01:32:24,858 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:24,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-31 01:32:24,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:24,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:24,900 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 01:32:24,901 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 01:32:24,902 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 01:32:24,902 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:25,002 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 01:32:25,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-31 01:32:25,013 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 01:32:25,013 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 01:32:25,013 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 01:32:25,013 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 01:32:25,013 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 01:32:25,014 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,014 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 01:32:25,014 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 01:32:25,014 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration1_Loop [2021-08-31 01:32:25,014 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 01:32:25,014 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 01:32:25,015 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 01:32:25,018 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 01:32:25,022 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 01:32:25,060 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 01:32:25,063 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 01:32:25,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,065 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 01:32:25,108 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 01:32:25,112 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 01:32:25,119 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 01:32:25,119 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 01:32:25,120 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 01:32:25,120 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 01:32:25,124 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-31 01:32:25,124 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-31 01:32:25,170 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 01:32:25,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-08-31 01:32:25,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,194 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 01:32:25,196 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 01:32:25,197 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 01:32:25,208 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 01:32:25,208 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 01:32:25,208 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 01:32:25,208 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 01:32:25,219 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-31 01:32:25,219 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-31 01:32:25,236 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 01:32:25,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-08-31 01:32:25,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,254 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 01:32:25,257 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 01:32:25,258 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 01:32:25,264 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 01:32:25,264 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 01:32:25,265 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 01:32:25,265 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 01:32:25,265 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 01:32:25,266 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 01:32:25,266 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 01:32:25,280 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 01:32:25,285 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-31 01:32:25,285 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-31 01:32:25,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,287 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 01:32:25,288 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 01:32:25,290 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 01:32:25,290 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 01:32:25,290 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 01:32:25,290 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2021-08-31 01:32:25,329 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 01:32:25,331 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 01:32:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:25,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 01:32:25,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:25,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 01:32:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:25,364 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 01:32:25,381 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-31 01:32:25,382 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 3 states, 3 states have (on average 1.0) 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 01:32:25,408 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 3 states, 3 states have (on average 1.0) 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) Result 23 states and 30 transitions. Complement of second has 6 states. [2021-08-31 01:32:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-31 01:32:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) 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 01:32:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-08-31 01:32:25,413 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2021-08-31 01:32:25,413 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:25,413 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2021-08-31 01:32:25,414 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:25,414 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2021-08-31 01:32:25,414 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:25,414 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2021-08-31 01:32:25,416 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-31 01:32:25,418 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2021-08-31 01:32:25,418 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-08-31 01:32:25,418 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-08-31 01:32:25,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2021-08-31 01:32:25,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 01:32:25,419 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-31 01:32:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2021-08-31 01:32:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-31 01:32:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 01:32:25,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2021-08-31 01:32:25,433 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-31 01:32:25,433 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-08-31 01:32:25,433 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-31 01:32:25,433 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2021-08-31 01:32:25,434 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-31 01:32:25,434 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 01:32:25,434 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 01:32:25,434 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-31 01:32:25,434 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-31 01:32:25,434 INFO L791 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 69#L12-2 assume !!!(main_~x~0 == main_~y~0); 67#L12 assume !(main_~x~0 > main_~y~0);main_~x~0 := 1 + main_~x~0; 63#L12-2 [2021-08-31 01:32:25,434 INFO L793 eck$LassoCheckResult]: Loop: 63#L12-2 assume !!!(main_~x~0 == main_~y~0); 64#L12 assume main_~x~0 > main_~y~0;main_~y~0 := 1 + main_~y~0; 63#L12-2 [2021-08-31 01:32:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-08-31 01:32:25,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:25,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870394815] [2021-08-31 01:32:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:25,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:25,439 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:25,442 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:25,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:25,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-08-31 01:32:25,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:25,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205808332] [2021-08-31 01:32:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:25,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:25,445 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:25,447 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2021-08-31 01:32:25,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:25,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431068770] [2021-08-31 01:32:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:25,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 01:32:25,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 01:32:25,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431068770] [2021-08-31 01:32:25,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431068770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-31 01:32:25,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570757675] [2021-08-31 01:32:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:25,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-31 01:32:25,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,533 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 01:32:25,534 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-31 01:32:25,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-31 01:32:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:25,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 01:32:25,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 01:32:25,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-31 01:32:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 01:32:25,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570757675] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-31 01:32:25,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-31 01:32:25,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2021-08-31 01:32:25,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049713744] [2021-08-31 01:32:25,618 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 01:32:25,618 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 01:32:25,619 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 01:32:25,619 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 01:32:25,619 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 01:32:25,619 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,619 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 01:32:25,619 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 01:32:25,619 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration2_Loop [2021-08-31 01:32:25,619 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 01:32:25,619 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 01:32:25,620 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 01:32:25,622 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 01:32:25,626 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 01:32:25,649 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 01:32:25,649 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 01:32:25,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,650 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 01:32:25,651 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 01:32:25,652 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 01:32:25,653 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:25,674 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 01:32:25,674 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 01:32:25,691 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 01:32:25,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,692 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 01:32:25,693 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 01:32:25,695 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 01:32:25,695 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:25,732 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 01:32:25,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,733 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 01:32:25,734 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 01:32:25,735 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 01:32:25,735 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:25,838 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 01:32:25,843 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 01:32:25,843 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 01:32:25,843 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 01:32:25,843 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 01:32:25,844 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 01:32:25,844 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 01:32:25,844 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,844 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 01:32:25,844 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 01:32:25,844 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration2_Loop [2021-08-31 01:32:25,844 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 01:32:25,844 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 01:32:25,845 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 01:32:25,848 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 01:32:25,852 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 01:32:25,876 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 01:32:25,877 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 01:32:25,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,890 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 01:32:25,891 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 01:32:25,892 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 01:32:25,898 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 01:32:25,899 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 01:32:25,899 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 01:32:25,899 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 01:32:25,901 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-31 01:32:25,901 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-31 01:32:25,932 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 01:32:25,950 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 01:32:25,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,951 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 01:32:25,952 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 01:32:25,954 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 01:32:25,960 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 01:32:25,960 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 01:32:25,960 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 01:32:25,960 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 01:32:25,960 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 01:32:25,961 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 01:32:25,961 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 01:32:25,976 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 01:32:25,979 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-31 01:32:25,979 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-31 01:32:25,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:25,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:25,980 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 01:32:25,981 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 01:32:25,982 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 01:32:25,982 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 01:32:25,982 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 01:32:25,982 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2021-08-31 01:32:25,999 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 01:32:26,000 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 01:32:26,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:26,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 01:32:26,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:26,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 01:32:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:26,026 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 01:32:26,026 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-31 01:32:26,026 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 01:32:26,036 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 11 states and 16 transitions. Complement of second has 5 states. [2021-08-31 01:32:26,040 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 01:32:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 01:32:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-08-31 01:32:26,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2021-08-31 01:32:26,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:26,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2021-08-31 01:32:26,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:26,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2021-08-31 01:32:26,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:26,041 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2021-08-31 01:32:26,042 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-31 01:32:26,042 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2021-08-31 01:32:26,042 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-08-31 01:32:26,043 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-31 01:32:26,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2021-08-31 01:32:26,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 01:32:26,045 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2021-08-31 01:32:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2021-08-31 01:32:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-31 01:32:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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 01:32:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2021-08-31 01:32:26,046 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2021-08-31 01:32:26,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 01:32:26,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-31 01:32:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-31 01:32:26,051 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 01:32:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 01:32:26,070 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2021-08-31 01:32:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-31 01:32:26,071 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2021-08-31 01:32:26,072 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-31 01:32:26,073 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2021-08-31 01:32:26,074 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-08-31 01:32:26,074 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-31 01:32:26,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2021-08-31 01:32:26,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 01:32:26,077 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-08-31 01:32:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2021-08-31 01:32:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2021-08-31 01:32:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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 01:32:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2021-08-31 01:32:26,078 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-08-31 01:32:26,078 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-08-31 01:32:26,078 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-31 01:32:26,079 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2021-08-31 01:32:26,079 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-31 01:32:26,079 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 01:32:26,079 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 01:32:26,079 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-31 01:32:26,080 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-31 01:32:26,080 INFO L791 eck$LassoCheckResult]: Stem: 169#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 170#L12-2 assume !!!(main_~x~0 == main_~y~0); 166#L12 [2021-08-31 01:32:26,080 INFO L793 eck$LassoCheckResult]: Loop: 166#L12 assume !(main_~x~0 > main_~y~0);main_~x~0 := 1 + main_~x~0; 165#L12-2 assume !!!(main_~x~0 == main_~y~0); 166#L12 [2021-08-31 01:32:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:26,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-08-31 01:32:26,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:26,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45486043] [2021-08-31 01:32:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:26,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:26,084 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:26,092 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:26,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2021-08-31 01:32:26,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:26,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976007021] [2021-08-31 01:32:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:26,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:26,096 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:26,099 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:26,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:26,099 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2021-08-31 01:32:26,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:26,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334066081] [2021-08-31 01:32:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:26,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:26,109 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:26,114 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:26,143 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 01:32:26,143 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 01:32:26,143 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 01:32:26,143 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 01:32:26,143 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 01:32:26,143 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:26,143 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 01:32:26,143 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 01:32:26,143 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration3_Loop [2021-08-31 01:32:26,143 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 01:32:26,143 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 01:32:26,144 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 01:32:26,146 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 01:32:26,150 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 01:32:26,198 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 01:32:26,198 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 01:32:26,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:26,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:26,217 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 01:32:26,218 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 01:32:26,221 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 01:32:26,221 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:26,239 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 01:32:26,239 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 01:32:26,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-31 01:32:26,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:26,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:26,269 INFO L229 MonitoredProcess]: Starting monitored process 18 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 01:32:26,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-31 01:32:26,277 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 01:32:26,277 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:26,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-08-31 01:32:26,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:26,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:26,311 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 01:32:26,312 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 01:32:26,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 01:32:26,313 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:28,600 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 01:32:28,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2021-08-31 01:32:28,604 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 01:32:28,604 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 01:32:28,604 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 01:32:28,604 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 01:32:28,604 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 01:32:28,604 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:28,605 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 01:32:28,605 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 01:32:28,605 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration3_Loop [2021-08-31 01:32:28,605 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 01:32:28,605 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 01:32:28,606 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 01:32:28,622 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 01:32:28,624 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 01:32:28,667 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 01:32:28,668 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 01:32:28,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:28,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:28,669 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 01:32:28,688 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 01:32:28,690 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 01:32:28,696 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 01:32:28,696 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 01:32:28,696 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 01:32:28,696 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-08-31 01:32:28,696 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 01:32:28,698 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-08-31 01:32:28,698 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 01:32:28,724 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 01:32:28,726 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 01:32:28,739 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-31 01:32:28,739 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-31 01:32:28,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:28,740 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 01:32:28,757 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 01:32:28,757 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 01:32:28,757 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 01:32:28,757 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~y~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2021-08-31 01:32:28,771 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 01:32:28,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-08-31 01:32:28,775 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 01:32:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:28,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 01:32:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:28,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 01:32:28,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:28,817 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 01:32:28,817 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 01:32:28,817 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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 01:32:28,824 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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) Result 11 states and 13 transitions. Complement of second has 5 states. [2021-08-31 01:32:28,824 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 01:32:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) 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 01:32:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-08-31 01:32:28,825 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2021-08-31 01:32:28,825 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:28,826 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-31 01:32:28,826 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:28,826 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2021-08-31 01:32:28,826 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:28,826 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-08-31 01:32:28,826 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-31 01:32:28,827 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2021-08-31 01:32:28,827 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-08-31 01:32:28,827 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2021-08-31 01:32:28,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2021-08-31 01:32:28,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 01:32:28,827 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-08-31 01:32:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2021-08-31 01:32:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2021-08-31 01:32:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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 01:32:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2021-08-31 01:32:28,828 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-08-31 01:32:28,828 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-08-31 01:32:28,828 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-31 01:32:28,828 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2021-08-31 01:32:28,829 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-08-31 01:32:28,829 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 01:32:28,829 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 01:32:28,829 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2021-08-31 01:32:28,829 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-08-31 01:32:28,829 INFO L791 eck$LassoCheckResult]: Stem: 219#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~c~0, main_~x~0, main_~y~0;havoc main_~c~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~c~0 := 0; 215#L12-2 assume !!!(main_~x~0 == main_~y~0); 216#L12 assume main_~x~0 > main_~y~0;main_~y~0 := 1 + main_~y~0; 217#L12-2 assume !!!(main_~x~0 == main_~y~0); 218#L12 [2021-08-31 01:32:28,829 INFO L793 eck$LassoCheckResult]: Loop: 218#L12 assume !(main_~x~0 > main_~y~0);main_~x~0 := 1 + main_~x~0; 220#L12-2 assume !!!(main_~x~0 == main_~y~0); 218#L12 [2021-08-31 01:32:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2021-08-31 01:32:28,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:28,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385165635] [2021-08-31 01:32:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:28,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:28,833 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:28,836 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2021-08-31 01:32:28,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:28,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810639747] [2021-08-31 01:32:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:28,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:28,838 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 01:32:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 01:32:28,840 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 01:32:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2021-08-31 01:32:28,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 01:32:28,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661502457] [2021-08-31 01:32:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 01:32:28,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 01:32:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 01:32:28,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 01:32:28,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661502457] [2021-08-31 01:32:28,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661502457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-31 01:32:28,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-31 01:32:28,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-31 01:32:28,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331855193] [2021-08-31 01:32:28,870 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 01:32:28,870 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 01:32:28,870 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 01:32:28,870 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 01:32:28,870 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 01:32:28,870 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:28,870 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 01:32:28,871 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 01:32:28,871 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration4_Loop [2021-08-31 01:32:28,871 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 01:32:28,871 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 01:32:28,871 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 01:32:28,873 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 01:32:28,877 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 01:32:28,913 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 01:32:28,913 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 01:32:28,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:28,914 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 01:32:28,915 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 01:32:28,918 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 01:32:28,918 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:28,929 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 01:32:28,930 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 01:32:28,946 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 01:32:28,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:28,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:28,947 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 01:32:28,948 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 01:32:28,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 01:32:28,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:28,980 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 01:32:28,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:28,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:28,982 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 01:32:28,983 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 01:32:28,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 01:32:28,984 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 01:32:31,272 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 01:32:31,278 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 01:32:31,278 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 01:32:31,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 01:32:31,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 01:32:31,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 01:32:31,278 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 01:32:31,278 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:31,278 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 01:32:31,278 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 01:32:31,278 INFO L133 ssoRankerPreferences]: Filename of dumped script: a.10.c_Iteration4_Loop [2021-08-31 01:32:31,278 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 01:32:31,278 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 01:32:31,279 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 01:32:31,295 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 01:32:31,297 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 01:32:31,347 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 01:32:31,347 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 01:32:31,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:31,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:31,348 INFO L229 MonitoredProcess]: Starting monitored process 25 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 01:32:31,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-08-31 01:32:31,376 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 01:32:31,382 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 01:32:31,382 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 01:32:31,382 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 01:32:31,383 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-08-31 01:32:31,383 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 01:32:31,384 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-08-31 01:32:31,384 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 01:32:31,400 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 01:32:31,413 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-31 01:32:31,413 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-31 01:32:31,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 01:32:31,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 01:32:31,426 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 01:32:31,450 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 01:32:31,450 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 01:32:31,451 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 01:32:31,451 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~y~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2021-08-31 01:32:31,465 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 01:32:31,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-08-31 01:32:31,468 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 01:32:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:31,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 01:32:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:31,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 01:32:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:31,519 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 01:32:31,520 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 01:32:31,520 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 01:32:31,525 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 states and 8 transitions. Complement of second has 3 states. [2021-08-31 01:32:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-08-31 01:32:31,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 01:32:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2021-08-31 01:32:31,527 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-31 01:32:31,527 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:31,527 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-31 01:32:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 01:32:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:31,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 01:32:31,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:31,568 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 01:32:31,570 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 01:32:31,570 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 01:32:31,576 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 states and 8 transitions. Complement of second has 3 states. [2021-08-31 01:32:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-08-31 01:32:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 01:32:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2021-08-31 01:32:31,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-31 01:32:31,578 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:31,578 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-31 01:32:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 01:32:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-31 01:32:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 01:32:31,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 01:32:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 01:32:31,613 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 01:32:31,614 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 01:32:31,614 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 01:32:31,622 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 8 states and 9 transitions. Complement of second has 4 states. [2021-08-31 01:32:31,623 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 01:32:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 01:32:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-08-31 01:32:31,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2021-08-31 01:32:31,623 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:31,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2021-08-31 01:32:31,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:31,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2021-08-31 01:32:31,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 01:32:31,624 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2021-08-31 01:32:31,625 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-31 01:32:31,625 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2021-08-31 01:32:31,625 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-31 01:32:31,625 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-31 01:32:31,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-31 01:32:31,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-31 01:32:31,625 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 01:32:31,625 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 01:32:31,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 01:32:31,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-31 01:32:31,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-31 01:32:31,626 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 01:32:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 01:32:31,626 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-08-31 01:32:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-31 01:32:31,626 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-08-31 01:32:31,627 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-31 01:32:31,627 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-08-31 01:32:31,627 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-31 01:32:31,627 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-31 01:32:31,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-31 01:32:31,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-31 01:32:31,627 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 01:32:31,627 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 01:32:31,627 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 01:32:31,627 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-31 01:32:31,627 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-31 01:32:31,628 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-31 01:32:31,628 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-31 01:32:31,630 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 01:32:31,632 INFO L158 Benchmark]: Toolchain (without parser) took 7731.91ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 43.6MB in the beginning and 29.2MB in the end (delta: 14.4MB). Peak memory consumption was 36.2MB. Max. memory is 16.1GB. [2021-08-31 01:32:31,632 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 45.1MB in the beginning and 45.1MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-31 01:32:31,633 INFO L158 Benchmark]: CACSL2BoogieTranslator took 132.03ms. Allocated memory is still 62.9MB. Free memory was 43.5MB in the beginning and 35.0MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-31 01:32:31,633 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.17ms. Allocated memory is still 62.9MB. Free memory was 35.0MB in the beginning and 46.6MB in the end (delta: -11.6MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2021-08-31 01:32:31,633 INFO L158 Benchmark]: Boogie Preprocessor took 10.43ms. Allocated memory is still 62.9MB. Free memory was 46.6MB in the beginning and 45.7MB in the end (delta: 897.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-31 01:32:31,634 INFO L158 Benchmark]: RCFGBuilder took 147.33ms. Allocated memory is still 62.9MB. Free memory was 45.7MB in the beginning and 38.6MB in the end (delta: 7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-31 01:32:31,634 INFO L158 Benchmark]: BuchiAutomizer took 7395.88ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 38.3MB in the beginning and 29.2MB in the end (delta: 9.1MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. [2021-08-31 01:32:31,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 45.1MB in the beginning and 45.1MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 132.03ms. Allocated memory is still 62.9MB. Free memory was 43.5MB in the beginning and 35.0MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.17ms. Allocated memory is still 62.9MB. Free memory was 35.0MB in the beginning and 46.6MB in the end (delta: -11.6MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.43ms. Allocated memory is still 62.9MB. Free memory was 46.6MB in the beginning and 45.7MB in the end (delta: 897.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 147.33ms. Allocated memory is still 62.9MB. Free memory was 45.7MB in the beginning and 38.6MB in the end (delta: 7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 7395.88ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 38.3MB in the beginning and 29.2MB in the end (delta: 9.1MB). Peak memory consumption was 31.3MB. 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 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x + -1 * y and consists of 4 locations. One deterministic module has affine ranking function x + -1 * y and consists of 3 locations. One deterministic module has affine ranking function 2 * y + -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * y + -2 * x + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 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 01:32:31,660 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 01:32:31,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2021-08-31 01:32:31,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-31 01:32:32,081 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...