./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 6c24879c 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/recursive/Fibonacci02.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-13 04:19:50,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 04:19:50,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 04:19:50,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 04:19:50,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 04:19:50,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 04:19:50,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 04:19:50,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 04:19:50,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 04:19:50,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 04:19:50,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 04:19:50,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 04:19:50,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 04:19:50,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 04:19:50,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 04:19:50,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 04:19:50,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 04:19:50,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 04:19:50,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 04:19:50,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 04:19:50,409 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 04:19:50,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 04:19:50,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 04:19:50,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 04:19:50,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 04:19:50,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 04:19:50,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 04:19:50,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 04:19:50,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 04:19:50,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 04:19:50,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 04:19:50,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 04:19:50,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 04:19:50,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 04:19:50,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 04:19:50,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 04:19:50,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 04:19:50,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 04:19:50,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 04:19:50,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 04:19:50,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 04:19:50,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 04:19:50,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-07-13 04:19:50,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 04:19:50,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 04:19:50,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 04:19:50,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 04:19:50,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 04:19:50,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 04:19:50,462 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 04:19:50,462 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-13 04:19:50,462 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-13 04:19:50,463 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-13 04:19:50,463 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-13 04:19:50,463 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-13 04:19:50,463 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-13 04:19:50,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 04:19:50,464 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 04:19:50,464 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-13 04:19:50,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 04:19:50,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 04:19:50,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 04:19:50,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-13 04:19:50,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-13 04:19:50,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-13 04:19:50,466 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 04:19:50,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 04:19:50,466 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-13 04:19:50,466 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 04:19:50,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-13 04:19:50,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 04:19:50,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 04:19:50,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 04:19:50,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 04:19:50,469 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-13 04:19:50,469 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 [2022-07-13 04:19:50,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 04:19:50,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 04:19:50,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 04:19:50,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 04:19:50,678 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 04:19:50,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci02.c [2022-07-13 04:19:50,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4dd77045/c417d64540f842dea36e613ec4e43fab/FLAGd0c465f5e [2022-07-13 04:19:51,030 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 04:19:51,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci02.c [2022-07-13 04:19:51,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4dd77045/c417d64540f842dea36e613ec4e43fab/FLAGd0c465f5e [2022-07-13 04:19:51,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4dd77045/c417d64540f842dea36e613ec4e43fab [2022-07-13 04:19:51,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 04:19:51,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 04:19:51,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 04:19:51,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 04:19:51,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 04:19:51,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d65fceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51, skipping insertion in model container [2022-07-13 04:19:51,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 04:19:51,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 04:19:51,642 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2022-07-13 04:19:51,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 04:19:51,651 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 04:19:51,663 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2022-07-13 04:19:51,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 04:19:51,674 INFO L208 MainTranslator]: Completed translation [2022-07-13 04:19:51,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51 WrapperNode [2022-07-13 04:19:51,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 04:19:51,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 04:19:51,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 04:19:51,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 04:19:51,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,695 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-07-13 04:19:51,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 04:19:51,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 04:19:51,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 04:19:51,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 04:19:51,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 04:19:51,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 04:19:51,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 04:19:51,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 04:19:51,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (1/1) ... [2022-07-13 04:19:51,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:51,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:51,739 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) [2022-07-13 04:19:51,748 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 [2022-07-13 04:19:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-07-13 04:19:51,765 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-07-13 04:19:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 04:19:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 04:19:51,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 04:19:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 04:19:51,802 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 04:19:51,804 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 04:19:51,858 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 04:19:51,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 04:19:51,862 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 04:19:51,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:19:51 BoogieIcfgContainer [2022-07-13 04:19:51,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 04:19:51,864 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-13 04:19:51,864 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-13 04:19:51,866 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-13 04:19:51,867 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-13 04:19:51,867 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.07 04:19:51" (1/3) ... [2022-07-13 04:19:51,874 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a7e403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.07 04:19:51, skipping insertion in model container [2022-07-13 04:19:51,874 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-13 04:19:51,874 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:51" (2/3) ... [2022-07-13 04:19:51,874 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a7e403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.07 04:19:51, skipping insertion in model container [2022-07-13 04:19:51,874 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-13 04:19:51,874 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:19:51" (3/3) ... [2022-07-13 04:19:51,875 INFO L354 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2022-07-13 04:19:51,911 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-13 04:19:51,911 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-13 04:19:51,911 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-13 04:19:51,911 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-13 04:19:51,911 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-13 04:19:51,911 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-13 04:19:51,911 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-13 04:19:51,911 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-13 04:19:51,914 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 04:19:51,927 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-13 04:19:51,927 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-13 04:19:51,928 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-13 04:19:51,932 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-13 04:19:51,932 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-13 04:19:51,932 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-13 04:19:51,932 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 04:19:51,934 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-13 04:19:51,934 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-13 04:19:51,934 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-13 04:19:51,934 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-13 04:19:51,934 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-13 04:19:51,939 INFO L752 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 14#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 10#L29true call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 4#fibonacciENTRYtrue [2022-07-13 04:19:51,939 INFO L754 eck$LassoCheckResult]: Loop: 4#fibonacciENTRYtrue ~n := #in~n; 5#L17true assume !(~n < 1); 17#L19true assume !(1 == ~n); 16#L22true call #t~ret4 := fibonacci(~n - 1);< 4#fibonacciENTRYtrue [2022-07-13 04:19:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:51,956 INFO L85 PathProgramCache]: Analyzing trace with hash 42781, now seen corresponding path program 1 times [2022-07-13 04:19:51,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:51,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255063035] [2022-07-13 04:19:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:51,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:52,046 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 04:19:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:52,079 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 04:19:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:52,082 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 1 times [2022-07-13 04:19:52,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:52,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249047657] [2022-07-13 04:19:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:52,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:52,090 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 04:19:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:52,096 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 04:19:52,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:52,098 INFO L85 PathProgramCache]: Analyzing trace with hash 854450357, now seen corresponding path program 1 times [2022-07-13 04:19:52,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:52,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51514523] [2022-07-13 04:19:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:52,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:52,117 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 04:19:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:52,135 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 04:19:52,230 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:19:52,230 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:19:52,230 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:19:52,230 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:19:52,231 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-13 04:19:52,231 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,231 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:19:52,231 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:19:52,231 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2022-07-13 04:19:52,231 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:19:52,231 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:19:52,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,360 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:19:52,361 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-13 04:19:52,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,364 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) [2022-07-13 04:19:52,365 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 [2022-07-13 04:19:52,368 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:52,368 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:52,386 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:52,386 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:52,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2022-07-13 04:19:52,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,406 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) [2022-07-13 04:19:52,407 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 [2022-07-13 04:19:52,410 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:52,410 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:52,425 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:52,425 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:52,442 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 [2022-07-13 04:19:52,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,443 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) [2022-07-13 04:19:52,449 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 [2022-07-13 04:19:52,450 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:52,452 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:52,459 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:52,459 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:52,475 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 [2022-07-13 04:19:52,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,477 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) [2022-07-13 04:19:52,478 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 [2022-07-13 04:19:52,479 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:52,479 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:52,524 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 [2022-07-13 04:19:52,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,526 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) [2022-07-13 04:19:52,527 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 [2022-07-13 04:19:52,528 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-13 04:19:52,528 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:52,583 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-13 04:19:52,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:52,586 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:19:52,586 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:19:52,586 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:19:52,586 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:19:52,586 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-13 04:19:52,586 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,587 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:19:52,587 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:19:52,587 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2022-07-13 04:19:52,587 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:19:52,587 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:19:52,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,615 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:52,658 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:19:52,665 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-13 04:19:52,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,671 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) [2022-07-13 04:19:52,672 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 [2022-07-13 04:19:52,674 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 [2022-07-13 04:19:52,687 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:52,687 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:52,687 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:52,687 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:52,687 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:52,692 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:52,692 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:52,717 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:19:52,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:52,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,771 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) [2022-07-13 04:19:52,774 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 [2022-07-13 04:19:52,774 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 [2022-07-13 04:19:52,780 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:52,781 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:52,781 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:52,781 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:52,781 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:52,786 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:52,786 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:52,804 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:19:52,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2022-07-13 04:19:52,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,821 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) [2022-07-13 04:19:52,823 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 [2022-07-13 04:19:52,824 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 [2022-07-13 04:19:52,830 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:52,830 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:52,830 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:52,830 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:52,830 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:52,831 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:52,831 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:52,843 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:19:52,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2022-07-13 04:19:52,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,860 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-13 04:19:52,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-07-13 04:19:52,899 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 [2022-07-13 04:19:52,905 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:52,905 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:52,906 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:52,906 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:52,906 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:52,910 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:52,910 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:52,921 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-13 04:19:52,924 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-13 04:19:52,924 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-13 04:19:52,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:52,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:52,926 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) [2022-07-13 04:19:52,929 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 [2022-07-13 04:19:52,929 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-13 04:19:52,929 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-13 04:19:52,929 INFO L513 LassoAnalysis]: Proved termination. [2022-07-13 04:19:52,930 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2022-07-13 04:19:52,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2022-07-13 04:19:52,949 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-13 04:19:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:52,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 04:19:52,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:53,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 04:19:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:53,087 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-07-13 04:19:53,088 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 04:19:53,177 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 47 states and 59 transitions. Complement of second has 12 states. [2022-07-13 04:19:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-13 04:19:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 04:19:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2022-07-13 04:19:53,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2022-07-13 04:19:53,187 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:53,187 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2022-07-13 04:19:53,187 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:53,187 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2022-07-13 04:19:53,187 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:53,188 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2022-07-13 04:19:53,196 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-13 04:19:53,202 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 25 states and 34 transitions. [2022-07-13 04:19:53,203 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2022-07-13 04:19:53,203 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-07-13 04:19:53,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2022-07-13 04:19:53,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-13 04:19:53,204 INFO L369 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-13 04:19:53,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2022-07-13 04:19:53,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2022-07-13 04:19:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 04:19:53,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-13 04:19:53,223 INFO L392 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-13 04:19:53,223 INFO L374 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-13 04:19:53,223 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-13 04:19:53,223 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2022-07-13 04:19:53,223 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-13 04:19:53,223 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-13 04:19:53,223 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-13 04:19:53,224 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 04:19:53,224 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 04:19:53,224 INFO L752 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 133#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 122#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 131#fibonacciENTRY ~n := #in~n; 128#L17 assume !(~n < 1); 129#L19 assume !(1 == ~n); 121#L22 call #t~ret4 := fibonacci(~n - 1);< 130#fibonacciENTRY ~n := #in~n; 125#L17 assume ~n < 1;#res := 0; 126#fibonacciFINAL assume true; 134#fibonacciEXIT >#29#return; 120#L22-1 [2022-07-13 04:19:53,224 INFO L754 eck$LassoCheckResult]: Loop: 120#L22-1 call #t~ret5 := fibonacci(~n - 2);< 124#fibonacciENTRY ~n := #in~n; 139#L17 assume !(~n < 1); 138#L19 assume !(1 == ~n); 123#L22 call #t~ret4 := fibonacci(~n - 1);< 124#fibonacciENTRY ~n := #in~n; 139#L17 assume ~n < 1;#res := 0; 136#fibonacciFINAL assume true; 137#fibonacciEXIT >#29#return; 120#L22-1 [2022-07-13 04:19:53,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1391758089, now seen corresponding path program 1 times [2022-07-13 04:19:53,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:53,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104592368] [2022-07-13 04:19:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:53,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:53,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-13 04:19:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 04:19:53,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 04:19:53,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104592368] [2022-07-13 04:19:53,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104592368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 04:19:53,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 04:19:53,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 04:19:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954185597] [2022-07-13 04:19:53,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 04:19:53,290 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-13 04:19:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash 924369961, now seen corresponding path program 1 times [2022-07-13 04:19:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:53,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104690154] [2022-07-13 04:19:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:53,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:53,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 04:19:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 04:19:53,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 04:19:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104690154] [2022-07-13 04:19:53,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104690154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 04:19:53,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 04:19:53,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 04:19:53,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891674575] [2022-07-13 04:19:53,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 04:19:53,319 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-13 04:19:53,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 04:19:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 04:19:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 04:19:53,321 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:19:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 04:19:53,362 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-13 04:19:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 04:19:53,362 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2022-07-13 04:19:53,363 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-13 04:19:53,364 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2022-07-13 04:19:53,364 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2022-07-13 04:19:53,364 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2022-07-13 04:19:53,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2022-07-13 04:19:53,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-13 04:19:53,365 INFO L369 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-13 04:19:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2022-07-13 04:19:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-13 04:19:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 04:19:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-13 04:19:53,367 INFO L392 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-13 04:19:53,367 INFO L374 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-13 04:19:53,367 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-13 04:19:53,367 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2022-07-13 04:19:53,368 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-13 04:19:53,368 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-13 04:19:53,368 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-13 04:19:53,368 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 04:19:53,368 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-13 04:19:53,368 INFO L752 eck$LassoCheckResult]: Stem: 204#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 205#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 194#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 208#fibonacciENTRY ~n := #in~n; 200#L17 assume !(~n < 1); 203#L19 assume !(1 == ~n); 195#L22 call #t~ret4 := fibonacci(~n - 1);< 199#fibonacciENTRY ~n := #in~n; 201#L17 assume !(~n < 1); 202#L19 assume 1 == ~n;#res := 1; 216#fibonacciFINAL assume true; 215#fibonacciEXIT >#29#return; 193#L22-1 [2022-07-13 04:19:53,368 INFO L754 eck$LassoCheckResult]: Loop: 193#L22-1 call #t~ret5 := fibonacci(~n - 2);< 197#fibonacciENTRY ~n := #in~n; 198#L17 assume !(~n < 1); 210#L19 assume !(1 == ~n); 196#L22 call #t~ret4 := fibonacci(~n - 1);< 197#fibonacciENTRY ~n := #in~n; 198#L17 assume !(~n < 1); 210#L19 assume 1 == ~n;#res := 1; 211#fibonacciFINAL assume true; 213#fibonacciEXIT >#29#return; 193#L22-1 [2022-07-13 04:19:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:53,369 INFO L85 PathProgramCache]: Analyzing trace with hash 194852287, now seen corresponding path program 1 times [2022-07-13 04:19:53,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:53,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368971135] [2022-07-13 04:19:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:53,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:53,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-13 04:19:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:53,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 04:19:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368971135] [2022-07-13 04:19:53,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368971135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 04:19:53,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888508270] [2022-07-13 04:19:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:53,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 04:19:53,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:53,424 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 04:19:53,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 04:19:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:53,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 04:19:53,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:53,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 04:19:53,615 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 [2022-07-13 04:19:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:53,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888508270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 04:19:53,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 04:19:53,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-13 04:19:53,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544286288] [2022-07-13 04:19:53,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 04:19:53,641 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-13 04:19:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 1 times [2022-07-13 04:19:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:53,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498532647] [2022-07-13 04:19:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:53,647 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 04:19:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:53,650 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 04:19:53,743 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:19:53,743 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:19:53,743 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:19:53,743 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:19:53,743 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-13 04:19:53,743 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:53,743 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:19:53,743 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:19:53,743 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2022-07-13 04:19:53,744 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:19:53,744 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:19:53,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:53,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:53,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:53,752 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:53,783 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:19:53,783 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-13 04:19:53,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:53,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:53,784 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) [2022-07-13 04:19:53,786 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 [2022-07-13 04:19:53,787 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:53,787 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:53,815 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:53,816 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:53,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2022-07-13 04:19:53,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:53,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:53,833 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) [2022-07-13 04:19:53,833 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 [2022-07-13 04:19:53,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:53,835 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:53,841 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:53,842 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:53,858 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 [2022-07-13 04:19:53,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:53,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:53,859 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) [2022-07-13 04:19:53,860 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 [2022-07-13 04:19:53,861 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:53,861 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:53,867 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:53,868 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:53,885 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 [2022-07-13 04:19:53,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:53,887 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) [2022-07-13 04:19:53,906 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:53,906 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:53,911 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 [2022-07-13 04:19:53,943 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 [2022-07-13 04:19:53,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:53,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:53,945 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) [2022-07-13 04:19:53,946 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 [2022-07-13 04:19:53,947 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-13 04:19:53,947 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:54,280 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-13 04:19:54,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2022-07-13 04:19:54,286 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:19:54,286 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:19:54,286 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:19:54,286 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:19:54,286 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-13 04:19:54,286 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:54,286 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:19:54,286 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:19:54,286 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2022-07-13 04:19:54,286 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:19:54,286 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:19:54,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:54,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:54,294 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:54,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:54,335 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:19:54,335 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-13 04:19:54,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:54,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:54,336 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) [2022-07-13 04:19:54,337 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 [2022-07-13 04:19:54,338 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 [2022-07-13 04:19:54,344 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:54,344 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:54,344 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:54,344 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:54,344 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:54,344 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:54,344 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:54,360 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:19:54,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2022-07-13 04:19:54,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:54,377 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) [2022-07-13 04:19:54,377 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 [2022-07-13 04:19:54,379 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 [2022-07-13 04:19:54,384 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:54,385 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:54,385 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:54,385 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:54,385 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:54,385 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:54,385 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:54,386 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:19:54,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:54,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:54,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:54,403 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) [2022-07-13 04:19:54,406 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 [2022-07-13 04:19:54,406 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 [2022-07-13 04:19:54,412 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:54,412 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:54,412 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:54,412 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:54,412 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:54,412 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:54,412 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:54,424 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:19:54,442 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 [2022-07-13 04:19:54,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:54,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:54,443 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) [2022-07-13 04:19:54,444 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 [2022-07-13 04:19:54,445 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 [2022-07-13 04:19:54,451 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:54,451 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:54,451 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:54,451 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:54,451 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:54,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:54,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:54,467 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-13 04:19:54,470 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-13 04:19:54,471 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-13 04:19:54,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:54,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:54,473 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) [2022-07-13 04:19:54,474 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-13 04:19:54,474 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-13 04:19:54,475 INFO L513 LassoAnalysis]: Proved termination. [2022-07-13 04:19:54,475 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-13 04:19:54,479 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 [2022-07-13 04:19:54,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:54,492 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-13 04:19:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 04:19:54,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:54,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 04:19:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:54,657 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2022-07-13 04:19:54,657 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 04:19:54,820 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2022-07-13 04:19:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2022-07-13 04:19:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 04:19:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2022-07-13 04:19:54,824 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2022-07-13 04:19:54,825 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:54,825 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2022-07-13 04:19:54,825 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:54,825 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2022-07-13 04:19:54,827 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:54,828 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2022-07-13 04:19:54,840 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-13 04:19:54,845 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2022-07-13 04:19:54,846 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2022-07-13 04:19:54,846 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2022-07-13 04:19:54,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2022-07-13 04:19:54,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-13 04:19:54,847 INFO L369 hiAutomatonCegarLoop]: Abstraction has 108 states and 152 transitions. [2022-07-13 04:19:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2022-07-13 04:19:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-13 04:19:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2022-07-13 04:19:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2022-07-13 04:19:54,868 INFO L392 hiAutomatonCegarLoop]: Abstraction has 94 states and 126 transitions. [2022-07-13 04:19:54,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 04:19:54,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 04:19:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-13 04:19:54,870 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 04:19:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 04:19:54,968 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2022-07-13 04:19:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 04:19:54,969 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2022-07-13 04:19:54,976 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-13 04:19:54,999 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2022-07-13 04:19:54,999 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2022-07-13 04:19:55,000 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2022-07-13 04:19:55,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2022-07-13 04:19:55,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-13 04:19:55,000 INFO L369 hiAutomatonCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-07-13 04:19:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2022-07-13 04:19:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2022-07-13 04:19:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2022-07-13 04:19:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2022-07-13 04:19:55,006 INFO L392 hiAutomatonCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-13 04:19:55,006 INFO L374 stractBuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-13 04:19:55,006 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-13 04:19:55,006 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2022-07-13 04:19:55,011 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-13 04:19:55,011 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-13 04:19:55,012 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-13 04:19:55,012 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 04:19:55,013 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-13 04:19:55,014 INFO L752 eck$LassoCheckResult]: Stem: 805#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 806#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 788#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 814#fibonacciENTRY ~n := #in~n; 799#L17 assume !(~n < 1); 800#L19 assume !(1 == ~n); 795#L22 call #t~ret4 := fibonacci(~n - 1);< 794#fibonacciENTRY ~n := #in~n; 796#L17 assume !(~n < 1); 852#L19 assume !(1 == ~n); 803#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 850#L17 assume !(~n < 1); 848#L19 assume !(1 == ~n); 843#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 850#L17 assume !(~n < 1); 848#L19 assume !(1 == ~n); 843#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 851#L17 assume !(~n < 1); 849#L19 assume 1 == ~n;#res := 1; 847#fibonacciFINAL assume true; 846#fibonacciEXIT >#29#return; 791#L22-1 call #t~ret5 := fibonacci(~n - 2);< 844#fibonacciENTRY ~n := #in~n; 797#L17 assume ~n < 1;#res := 0; 798#fibonacciFINAL assume true; 888#fibonacciEXIT >#31#return; 887#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 885#fibonacciFINAL assume true; 877#fibonacciEXIT >#29#return; 819#L22-1 [2022-07-13 04:19:55,014 INFO L754 eck$LassoCheckResult]: Loop: 819#L22-1 call #t~ret5 := fibonacci(~n - 2);< 802#fibonacciENTRY ~n := #in~n; 882#L17 assume !(~n < 1); 818#L19 assume !(1 == ~n); 821#L22 call #t~ret4 := fibonacci(~n - 1);< 802#fibonacciENTRY ~n := #in~n; 882#L17 assume !(~n < 1); 818#L19 assume 1 == ~n;#res := 1; 822#fibonacciFINAL assume true; 874#fibonacciEXIT >#29#return; 819#L22-1 [2022-07-13 04:19:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:55,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1460678817, now seen corresponding path program 1 times [2022-07-13 04:19:55,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:55,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822546264] [2022-07-13 04:19:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:55,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:55,031 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 [2022-07-13 04:19:55,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-13 04:19:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:55,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 04:19:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:55,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-13 04:19:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 04:19:55,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 04:19:55,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822546264] [2022-07-13 04:19:55,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822546264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 04:19:55,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239974243] [2022-07-13 04:19:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:55,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 04:19:55,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:55,130 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 04:19:55,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 04:19:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:55,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 04:19:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 04:19:55,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 04:19:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 04:19:55,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239974243] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 04:19:55,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 04:19:55,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2022-07-13 04:19:55,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151873180] [2022-07-13 04:19:55,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 04:19:55,388 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-13 04:19:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:55,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 2 times [2022-07-13 04:19:55,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:55,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143916905] [2022-07-13 04:19:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:55,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:55,392 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 04:19:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:55,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 04:19:55,472 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:19:55,472 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:19:55,472 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:19:55,472 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:19:55,472 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-13 04:19:55,472 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:55,473 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:19:55,473 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:19:55,473 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2022-07-13 04:19:55,473 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:19:55,473 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:19:55,473 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:55,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:55,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:55,482 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:55,507 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:19:55,507 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-13 04:19:55,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:55,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:55,520 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) [2022-07-13 04:19:55,522 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:55,522 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:55,532 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 [2022-07-13 04:19:55,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2022-07-13 04:19:55,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:55,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:55,551 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) [2022-07-13 04:19:55,551 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 [2022-07-13 04:19:55,553 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-13 04:19:55,553 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:55,871 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-13 04:19:55,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2022-07-13 04:19:55,875 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:19:55,875 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:19:55,875 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:19:55,875 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:19:55,875 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-13 04:19:55,876 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:55,876 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:19:55,876 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:19:55,876 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2022-07-13 04:19:55,876 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:19:55,876 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:19:55,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:55,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:55,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:55,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:55,919 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:19:55,919 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-13 04:19:55,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:55,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:55,921 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) [2022-07-13 04:19:55,922 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 [2022-07-13 04:19:55,923 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-13 04:19:55,929 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:55,929 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:55,929 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:55,929 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:55,930 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:55,930 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:55,930 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:55,959 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:19:55,975 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 [2022-07-13 04:19:55,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:55,977 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-13 04:19:55,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-07-13 04:19:55,979 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 [2022-07-13 04:19:55,985 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:55,986 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:55,986 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:55,986 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:55,986 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:55,986 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:55,986 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:55,994 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:19:56,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2022-07-13 04:19:56,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:56,012 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-13 04:19:56,014 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 [2022-07-13 04:19:56,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-07-13 04:19:56,020 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:56,021 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:56,021 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:56,021 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:56,021 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:56,022 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:56,022 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:56,033 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-13 04:19:56,036 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-13 04:19:56,036 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-13 04:19:56,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:56,039 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-13 04:19:56,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2022-07-13 04:19:56,042 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-13 04:19:56,042 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-13 04:19:56,042 INFO L513 LassoAnalysis]: Proved termination. [2022-07-13 04:19:56,042 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-13 04:19:56,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2022-07-13 04:19:56,059 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-13 04:19:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:56,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 04:19:56,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:56,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 04:19:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:56,352 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2022-07-13 04:19:56,352 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 04:19:56,478 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Result 175 states and 233 transitions. Complement of second has 33 states. [2022-07-13 04:19:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2022-07-13 04:19:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 04:19:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2022-07-13 04:19:56,479 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 32 letters. Loop has 10 letters. [2022-07-13 04:19:56,480 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:56,480 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-13 04:19:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 04:19:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 04:19:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:56,721 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2022-07-13 04:19:56,721 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 04:19:56,822 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Result 300 states and 403 transitions. Complement of second has 25 states. [2022-07-13 04:19:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2022-07-13 04:19:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 04:19:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2022-07-13 04:19:56,824 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 32 letters. Loop has 10 letters. [2022-07-13 04:19:56,824 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:56,824 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-13 04:19:56,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 04:19:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 04:19:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:57,032 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2022-07-13 04:19:57,032 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 04:19:57,184 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 141 transitions. cyclomatic complexity: 40. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Result 858 states and 1136 transitions. Complement of second has 130 states. [2022-07-13 04:19:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2022-07-13 04:19:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 04:19:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2022-07-13 04:19:57,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 32 letters. Loop has 10 letters. [2022-07-13 04:19:57,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:57,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 42 letters. Loop has 10 letters. [2022-07-13 04:19:57,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:57,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 32 letters. Loop has 20 letters. [2022-07-13 04:19:57,187 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:57,187 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 858 states and 1136 transitions. [2022-07-13 04:19:57,195 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2022-07-13 04:19:57,200 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 858 states to 430 states and 620 transitions. [2022-07-13 04:19:57,200 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 163 [2022-07-13 04:19:57,201 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 188 [2022-07-13 04:19:57,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 430 states and 620 transitions. [2022-07-13 04:19:57,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-13 04:19:57,201 INFO L369 hiAutomatonCegarLoop]: Abstraction has 430 states and 620 transitions. [2022-07-13 04:19:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states and 620 transitions. [2022-07-13 04:19:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 352. [2022-07-13 04:19:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 221 states have (on average 1.1990950226244343) internal successors, (265), 235 states have internal predecessors, (265), 75 states have call successors, (84), 46 states have call predecessors, (84), 56 states have return successors, (136), 70 states have call predecessors, (136), 71 states have call successors, (136) [2022-07-13 04:19:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 485 transitions. [2022-07-13 04:19:57,241 INFO L392 hiAutomatonCegarLoop]: Abstraction has 352 states and 485 transitions. [2022-07-13 04:19:57,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 04:19:57,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 04:19:57,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-13 04:19:57,243 INFO L87 Difference]: Start difference. First operand 352 states and 485 transitions. Second operand has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 04:19:57,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 04:19:57,542 INFO L93 Difference]: Finished difference Result 683 states and 994 transitions. [2022-07-13 04:19:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 04:19:57,543 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 683 states and 994 transitions. [2022-07-13 04:19:57,550 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-13 04:19:57,556 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 683 states to 652 states and 949 transitions. [2022-07-13 04:19:57,557 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 282 [2022-07-13 04:19:57,557 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 285 [2022-07-13 04:19:57,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 949 transitions. [2022-07-13 04:19:57,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-13 04:19:57,557 INFO L369 hiAutomatonCegarLoop]: Abstraction has 652 states and 949 transitions. [2022-07-13 04:19:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states and 949 transitions. [2022-07-13 04:19:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 622. [2022-07-13 04:19:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 380 states have (on average 1.1631578947368422) internal successors, (442), 400 states have internal predecessors, (442), 151 states have call successors, (165), 76 states have call predecessors, (165), 91 states have return successors, (305), 145 states have call predecessors, (305), 141 states have call successors, (305) [2022-07-13 04:19:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 912 transitions. [2022-07-13 04:19:57,576 INFO L392 hiAutomatonCegarLoop]: Abstraction has 622 states and 912 transitions. [2022-07-13 04:19:57,576 INFO L374 stractBuchiCegarLoop]: Abstraction has 622 states and 912 transitions. [2022-07-13 04:19:57,576 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-13 04:19:57,576 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 622 states and 912 transitions. [2022-07-13 04:19:57,578 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-13 04:19:57,579 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-13 04:19:57,579 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-13 04:19:57,579 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 04:19:57,579 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-13 04:19:57,580 INFO L752 eck$LassoCheckResult]: Stem: 4173#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 4174#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 4183#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 4184#fibonacciENTRY ~n := #in~n; 4228#L17 assume !(~n < 1); 4227#L19 assume !(1 == ~n); 4223#L22 call #t~ret4 := fibonacci(~n - 1);< 4226#fibonacciENTRY ~n := #in~n; 4225#L17 assume !(~n < 1); 4224#L19 assume !(1 == ~n); 4219#L22 call #t~ret4 := fibonacci(~n - 1);< 4222#fibonacciENTRY ~n := #in~n; 4221#L17 assume !(~n < 1); 4220#L19 assume !(1 == ~n); 4215#L22 call #t~ret4 := fibonacci(~n - 1);< 4218#fibonacciENTRY ~n := #in~n; 4217#L17 assume !(~n < 1); 4216#L19 assume !(1 == ~n); 4211#L22 call #t~ret4 := fibonacci(~n - 1);< 4214#fibonacciENTRY ~n := #in~n; 4213#L17 assume !(~n < 1); 4212#L19 assume !(1 == ~n); 4208#L22 call #t~ret4 := fibonacci(~n - 1);< 4210#fibonacciENTRY ~n := #in~n; 4209#L17 assume !(~n < 1); 4207#L19 assume !(1 == ~n); 4203#L22 call #t~ret4 := fibonacci(~n - 1);< 4202#fibonacciENTRY ~n := #in~n; 4205#L17 assume !(~n < 1); 4579#L19 assume !(1 == ~n); 4204#L22 call #t~ret4 := fibonacci(~n - 1);< 4202#fibonacciENTRY ~n := #in~n; 4206#L17 assume !(~n < 1); 4609#L19 assume 1 == ~n;#res := 1; 4608#fibonacciFINAL assume true; 4605#fibonacciEXIT >#29#return; 4384#L22-1 call #t~ret5 := fibonacci(~n - 2);< 4386#fibonacciENTRY ~n := #in~n; 4684#L17 assume !(~n < 1); 4618#L19 assume !(1 == ~n); 4619#L22 call #t~ret4 := fibonacci(~n - 1);< 4630#fibonacciENTRY ~n := #in~n; 4681#L17 assume !(~n < 1); 4634#L19 assume !(1 == ~n); 4635#L22 call #t~ret4 := fibonacci(~n - 1);< 4650#fibonacciENTRY [2022-07-13 04:19:57,580 INFO L754 eck$LassoCheckResult]: Loop: 4650#fibonacciENTRY ~n := #in~n; 4665#L17 assume !(~n < 1); 4662#L19 assume !(1 == ~n); 4647#L22 call #t~ret4 := fibonacci(~n - 1);< 4650#fibonacciENTRY [2022-07-13 04:19:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:57,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1413084929, now seen corresponding path program 1 times [2022-07-13 04:19:57,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:57,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917571565] [2022-07-13 04:19:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:57,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:57,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-13 04:19:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 04:19:57,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 04:19:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917571565] [2022-07-13 04:19:57,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917571565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 04:19:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38598310] [2022-07-13 04:19:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:57,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 04:19:57,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:57,732 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 04:19:57,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-13 04:19:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:57,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 04:19:57,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 04:19:57,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 04:19:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 04:19:57,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38598310] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 04:19:57,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 04:19:57,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-07-13 04:19:57,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923181782] [2022-07-13 04:19:57,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 04:19:57,938 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-13 04:19:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 2 times [2022-07-13 04:19:57,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:57,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035678429] [2022-07-13 04:19:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:57,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:57,942 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 04:19:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:57,944 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 04:19:57,968 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:19:57,968 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:19:57,969 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:19:57,969 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:19:57,969 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-13 04:19:57,969 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:57,969 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:19:57,969 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:19:57,969 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2022-07-13 04:19:57,969 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:19:57,969 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:19:57,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:57,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:57,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:57,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:57,979 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:58,006 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:19:58,006 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-13 04:19:58,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:58,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:58,008 INFO L229 MonitoredProcess]: Starting monitored process 31 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) [2022-07-13 04:19:58,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2022-07-13 04:19:58,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:58,010 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:58,031 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:58,031 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:58,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2022-07-13 04:19:58,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:58,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:58,049 INFO L229 MonitoredProcess]: Starting monitored process 32 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) [2022-07-13 04:19:58,051 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:58,052 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:58,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2022-07-13 04:19:58,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:58,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:58,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:58,087 INFO L229 MonitoredProcess]: Starting monitored process 33 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) [2022-07-13 04:19:58,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2022-07-13 04:19:58,090 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-13 04:19:58,090 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:58,135 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-13 04:19:58,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:58,158 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:19:58,158 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:19:58,158 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:19:58,158 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:19:58,159 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-13 04:19:58,159 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:58,159 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:19:58,159 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:19:58,159 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2022-07-13 04:19:58,159 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:19:58,159 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:19:58,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:58,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:58,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:58,166 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:58,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:58,187 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:19:58,187 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-13 04:19:58,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:58,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:58,188 INFO L229 MonitoredProcess]: Starting monitored process 34 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) [2022-07-13 04:19:58,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2022-07-13 04:19:58,190 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 [2022-07-13 04:19:58,196 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:58,196 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:58,196 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:58,196 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:58,196 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:58,197 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:58,197 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:58,215 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:19:58,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:58,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:58,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:58,242 INFO L229 MonitoredProcess]: Starting monitored process 35 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) [2022-07-13 04:19:58,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2022-07-13 04:19:58,244 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 [2022-07-13 04:19:58,251 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:19:58,251 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:19:58,251 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:19:58,251 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:19:58,251 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:19:58,251 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:19:58,252 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:19:58,265 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-13 04:19:58,267 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-13 04:19:58,267 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-13 04:19:58,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:58,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:58,270 INFO L229 MonitoredProcess]: Starting monitored process 36 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) [2022-07-13 04:19:58,274 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-13 04:19:58,274 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-13 04:19:58,274 INFO L513 LassoAnalysis]: Proved termination. [2022-07-13 04:19:58,274 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2022-07-13 04:19:58,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2022-07-13 04:19:58,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2022-07-13 04:19:58,290 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-13 04:19:58,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:58,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 04:19:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 04:19:58,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:58,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:58,464 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-07-13 04:19:58,464 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:19:58,509 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 644 states and 934 transitions. Complement of second has 13 states. [2022-07-13 04:19:58,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-13 04:19:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:19:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-13 04:19:58,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 45 letters. Loop has 4 letters. [2022-07-13 04:19:58,511 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:58,511 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-13 04:19:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:58,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 04:19:58,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 04:19:58,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:58,646 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2022-07-13 04:19:58,646 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:19:58,689 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 644 states and 934 transitions. Complement of second has 13 states. [2022-07-13 04:19:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-13 04:19:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:19:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-13 04:19:58,690 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 45 letters. Loop has 4 letters. [2022-07-13 04:19:58,691 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:58,691 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-13 04:19:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:58,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 04:19:58,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:58,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 04:19:58,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:19:58,829 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-07-13 04:19:58,829 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:19:58,885 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 622 states and 912 transitions. cyclomatic complexity: 300. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 839 states and 1152 transitions. Complement of second has 14 states. [2022-07-13 04:19:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-13 04:19:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:19:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2022-07-13 04:19:58,887 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 45 letters. Loop has 4 letters. [2022-07-13 04:19:58,887 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:58,887 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-13 04:19:58,887 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:58,887 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 45 letters. Loop has 8 letters. [2022-07-13 04:19:58,888 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:19:58,888 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 839 states and 1152 transitions. [2022-07-13 04:19:58,895 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-13 04:19:58,901 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 839 states to 684 states and 985 transitions. [2022-07-13 04:19:58,902 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2022-07-13 04:19:58,902 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 250 [2022-07-13 04:19:58,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 684 states and 985 transitions. [2022-07-13 04:19:58,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-13 04:19:58,902 INFO L369 hiAutomatonCegarLoop]: Abstraction has 684 states and 985 transitions. [2022-07-13 04:19:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states and 985 transitions. [2022-07-13 04:19:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 654. [2022-07-13 04:19:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 407 states have (on average 1.1523341523341524) internal successors, (469), 432 states have internal predecessors, (469), 151 states have call successors, (165), 76 states have call predecessors, (165), 96 states have return successors, (315), 145 states have call predecessors, (315), 141 states have call successors, (315) [2022-07-13 04:19:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 949 transitions. [2022-07-13 04:19:58,917 INFO L392 hiAutomatonCegarLoop]: Abstraction has 654 states and 949 transitions. [2022-07-13 04:19:58,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 04:19:58,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 04:19:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-07-13 04:19:58,918 INFO L87 Difference]: Start difference. First operand 654 states and 949 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 14 states have internal predecessors, (36), 9 states have call successors, (10), 9 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:19:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 04:19:59,167 INFO L93 Difference]: Finished difference Result 799 states and 1195 transitions. [2022-07-13 04:19:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 04:19:59,168 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 799 states and 1195 transitions. [2022-07-13 04:19:59,175 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-13 04:19:59,182 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 799 states to 778 states and 1163 transitions. [2022-07-13 04:19:59,182 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 289 [2022-07-13 04:19:59,182 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 292 [2022-07-13 04:19:59,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 778 states and 1163 transitions. [2022-07-13 04:19:59,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-13 04:19:59,182 INFO L369 hiAutomatonCegarLoop]: Abstraction has 778 states and 1163 transitions. [2022-07-13 04:19:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states and 1163 transitions. [2022-07-13 04:19:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 710. [2022-07-13 04:19:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 441 states have (on average 1.145124716553288) internal successors, (505), 470 states have internal predecessors, (505), 169 states have call successors, (185), 86 states have call predecessors, (185), 100 states have return successors, (341), 153 states have call predecessors, (341), 159 states have call successors, (341) [2022-07-13 04:19:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1031 transitions. [2022-07-13 04:19:59,198 INFO L392 hiAutomatonCegarLoop]: Abstraction has 710 states and 1031 transitions. [2022-07-13 04:19:59,198 INFO L374 stractBuchiCegarLoop]: Abstraction has 710 states and 1031 transitions. [2022-07-13 04:19:59,198 INFO L287 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-07-13 04:19:59,198 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 710 states and 1031 transitions. [2022-07-13 04:19:59,202 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-13 04:19:59,202 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-13 04:19:59,202 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-13 04:19:59,203 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [12, 12, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 04:19:59,203 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-13 04:19:59,203 INFO L752 eck$LassoCheckResult]: Stem: 9192#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 9193#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 9202#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 9203#fibonacciENTRY ~n := #in~n; 9314#L17 assume !(~n < 1); 9310#L19 assume !(1 == ~n); 9280#L22 call #t~ret4 := fibonacci(~n - 1);< 9297#fibonacciENTRY ~n := #in~n; 9662#L17 assume !(~n < 1); 9661#L19 assume !(1 == ~n); 9283#L22 call #t~ret4 := fibonacci(~n - 1);< 9284#fibonacciENTRY ~n := #in~n; 9374#L17 assume !(~n < 1); 9372#L19 assume !(1 == ~n); 9318#L22 call #t~ret4 := fibonacci(~n - 1);< 9320#fibonacciENTRY ~n := #in~n; 9620#L17 assume !(~n < 1); 9619#L19 assume !(1 == ~n); 9367#L22 call #t~ret4 := fibonacci(~n - 1);< 9369#fibonacciENTRY ~n := #in~n; 9622#L17 assume !(~n < 1); 9621#L19 assume !(1 == ~n); 9327#L22 call #t~ret4 := fibonacci(~n - 1);< 9371#fibonacciENTRY ~n := #in~n; 9461#L17 assume !(~n < 1); 9452#L19 assume !(1 == ~n); 9443#L22 call #t~ret4 := fibonacci(~n - 1);< 9448#fibonacciENTRY ~n := #in~n; 9546#L17 assume !(~n < 1); 9545#L19 assume !(1 == ~n); 9385#L22 call #t~ret4 := fibonacci(~n - 1);< 9491#fibonacciENTRY ~n := #in~n; 9555#L17 assume !(~n < 1); 9492#L19 assume !(1 == ~n); 9382#L22 call #t~ret4 := fibonacci(~n - 1);< 9491#fibonacciENTRY ~n := #in~n; 9558#L17 assume !(~n < 1); 9751#L19 assume 1 == ~n;#res := 1; 9750#fibonacciFINAL assume true; 9748#fibonacciEXIT >#29#return; 9205#L22-1 call #t~ret5 := fibonacci(~n - 2);< 9745#fibonacciENTRY ~n := #in~n; 9868#L17 assume !(~n < 1); 9765#L19 assume !(1 == ~n); 9766#L22 call #t~ret4 := fibonacci(~n - 1);< 9802#fibonacciENTRY ~n := #in~n; 9851#L17 assume !(~n < 1); 9849#L19 assume !(1 == ~n); 9210#L22 call #t~ret4 := fibonacci(~n - 1);< 9219#fibonacciENTRY ~n := #in~n; 9220#L17 assume !(~n < 1); 9856#L19 assume !(1 == ~n); 9211#L22 [2022-07-13 04:19:59,203 INFO L754 eck$LassoCheckResult]: Loop: 9211#L22 call #t~ret4 := fibonacci(~n - 1);< 9219#fibonacciENTRY ~n := #in~n; 9220#L17 assume !(~n < 1); 9856#L19 assume !(1 == ~n); 9211#L22 [2022-07-13 04:19:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1648910477, now seen corresponding path program 2 times [2022-07-13 04:19:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:59,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777254222] [2022-07-13 04:19:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:59,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:59,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-13 04:19:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:19:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 04:19:59,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 04:19:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777254222] [2022-07-13 04:19:59,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777254222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 04:19:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177471548] [2022-07-13 04:19:59,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 04:19:59,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 04:19:59,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:59,359 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 04:19:59,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-13 04:19:59,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 04:19:59,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 04:19:59,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 04:19:59,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:19:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 04:19:59,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 04:19:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 04:19:59,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177471548] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 04:19:59,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 04:19:59,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-07-13 04:19:59,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388500337] [2022-07-13 04:19:59,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 04:19:59,483 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-13 04:19:59,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:19:59,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 3 times [2022-07-13 04:19:59,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 04:19:59,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078330002] [2022-07-13 04:19:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 04:19:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 04:19:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:59,485 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 04:19:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 04:19:59,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 04:19:59,517 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:19:59,517 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:19:59,517 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:19:59,517 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:19:59,517 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-13 04:19:59,517 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:59,517 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:19:59,517 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:19:59,517 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2022-07-13 04:19:59,517 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:19:59,517 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:19:59,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:59,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:59,520 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:59,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:19:59,564 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:19:59,564 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-13 04:19:59,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:59,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:59,565 INFO L229 MonitoredProcess]: Starting monitored process 38 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) [2022-07-13 04:19:59,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2022-07-13 04:19:59,568 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:59,568 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:59,588 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:59,589 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:59,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:59,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:59,609 INFO L229 MonitoredProcess]: Starting monitored process 39 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) [2022-07-13 04:19:59,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2022-07-13 04:19:59,612 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:59,612 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:59,632 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:59,632 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:59,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:59,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:59,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:59,667 INFO L229 MonitoredProcess]: Starting monitored process 40 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) [2022-07-13 04:19:59,671 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:59,671 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:59,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2022-07-13 04:19:59,687 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-13 04:19:59,687 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-13 04:19:59,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2022-07-13 04:19:59,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:59,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:59,705 INFO L229 MonitoredProcess]: Starting monitored process 41 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) [2022-07-13 04:19:59,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2022-07-13 04:19:59,751 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-13 04:19:59,751 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:19:59,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2022-07-13 04:19:59,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:19:59,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:19:59,783 INFO L229 MonitoredProcess]: Starting monitored process 42 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) [2022-07-13 04:19:59,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2022-07-13 04:19:59,785 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-13 04:19:59,785 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-13 04:20:04,355 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-13 04:20:04,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2022-07-13 04:20:04,361 INFO L210 LassoAnalysis]: Preferences: [2022-07-13 04:20:04,361 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-13 04:20:04,361 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-13 04:20:04,361 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-13 04:20:04,361 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-13 04:20:04,361 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:20:04,361 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-13 04:20:04,361 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-13 04:20:04,361 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2022-07-13 04:20:04,361 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-13 04:20:04,361 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-13 04:20:04,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:20:04,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:20:04,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:20:04,376 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-13 04:20:04,405 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-13 04:20:04,405 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-13 04:20:04,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:20:04,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:20:04,406 INFO L229 MonitoredProcess]: Starting monitored process 43 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) [2022-07-13 04:20:04,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2022-07-13 04:20:04,416 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 [2022-07-13 04:20:04,422 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:20:04,422 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:20:04,422 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:20:04,423 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:20:04,423 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:20:04,423 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:20:04,423 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:20:04,424 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:20:04,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2022-07-13 04:20:04,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:20:04,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:20:04,440 INFO L229 MonitoredProcess]: Starting monitored process 44 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) [2022-07-13 04:20:04,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2022-07-13 04:20:04,443 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 [2022-07-13 04:20:04,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:20:04,449 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:20:04,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:20:04,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:20:04,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:20:04,449 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:20:04,449 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:20:04,450 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-13 04:20:04,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Ended with exit code 0 [2022-07-13 04:20:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:20:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:20:04,467 INFO L229 MonitoredProcess]: Starting monitored process 45 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) [2022-07-13 04:20:04,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2022-07-13 04:20:04,469 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 [2022-07-13 04:20:04,475 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-13 04:20:04,475 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-13 04:20:04,475 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-13 04:20:04,475 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-13 04:20:04,475 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-13 04:20:04,476 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-13 04:20:04,476 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-13 04:20:04,477 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-13 04:20:04,479 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-13 04:20:04,479 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-13 04:20:04,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-13 04:20:04,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 04:20:04,481 INFO L229 MonitoredProcess]: Starting monitored process 46 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) [2022-07-13 04:20:04,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2022-07-13 04:20:04,483 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-13 04:20:04,483 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-13 04:20:04,483 INFO L513 LassoAnalysis]: Proved termination. [2022-07-13 04:20:04,484 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-13 04:20:04,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2022-07-13 04:20:04,500 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-13 04:20:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:20:04,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2022-07-13 04:20:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:20:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 04:20:04,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:20:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:20:04,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 04:20:04,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:20:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:20:04,690 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2022-07-13 04:20:04,690 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 710 states and 1031 transitions. cyclomatic complexity: 331 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:20:04,729 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 710 states and 1031 transitions. cyclomatic complexity: 331. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 734 states and 1056 transitions. Complement of second has 18 states. [2022-07-13 04:20:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-07-13 04:20:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:20:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2022-07-13 04:20:04,731 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 52 letters. Loop has 4 letters. [2022-07-13 04:20:04,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:20:04,732 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-13 04:20:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 04:20:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:20:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 04:20:04,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:20:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 04:20:04,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 04:20:04,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 04:20:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 04:20:04,893 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2022-07-13 04:20:04,893 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 710 states and 1031 transitions. cyclomatic complexity: 331 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:20:04,952 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 710 states and 1031 transitions. cyclomatic complexity: 331. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 964 states and 1378 transitions. Complement of second has 22 states. [2022-07-13 04:20:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2022-07-13 04:20:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:20:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2022-07-13 04:20:04,954 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 4 letters. [2022-07-13 04:20:04,955 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:20:04,956 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2022-07-13 04:20:04,956 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:20:04,956 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 8 letters. [2022-07-13 04:20:04,956 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-13 04:20:04,956 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 964 states and 1378 transitions. [2022-07-13 04:20:04,965 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-13 04:20:04,977 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 964 states to 888 states and 1297 transitions. [2022-07-13 04:20:04,977 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 290 [2022-07-13 04:20:04,978 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 318 [2022-07-13 04:20:04,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 888 states and 1297 transitions. [2022-07-13 04:20:04,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-13 04:20:04,981 INFO L369 hiAutomatonCegarLoop]: Abstraction has 888 states and 1297 transitions. [2022-07-13 04:20:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states and 1297 transitions. [2022-07-13 04:20:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 875. [2022-07-13 04:20:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 551 states have (on average 1.1306715063520871) internal successors, (623), 588 states have internal predecessors, (623), 202 states have call successors, (236), 113 states have call predecessors, (236), 122 states have return successors, (421), 173 states have call predecessors, (421), 192 states have call successors, (421) [2022-07-13 04:20:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1280 transitions. [2022-07-13 04:20:05,002 INFO L392 hiAutomatonCegarLoop]: Abstraction has 875 states and 1280 transitions. [2022-07-13 04:20:05,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 04:20:05,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 04:20:05,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-07-13 04:20:05,003 INFO L87 Difference]: Start difference. First operand 875 states and 1280 transitions. Second operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 12 states have internal predecessors, (35), 10 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-13 04:20:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 04:20:05,261 INFO L93 Difference]: Finished difference Result 475 states and 560 transitions. [2022-07-13 04:20:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 04:20:05,262 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 475 states and 560 transitions. [2022-07-13 04:20:05,264 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-13 04:20:05,265 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 475 states to 0 states and 0 transitions. [2022-07-13 04:20:05,265 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-13 04:20:05,265 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-13 04:20:05,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-13 04:20:05,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 04:20:05,265 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 04:20:05,265 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 04:20:05,265 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 04:20:05,265 INFO L287 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2022-07-13 04:20:05,266 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-13 04:20:05,266 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-13 04:20:05,266 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-13 04:20:05,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.07 04:20:05 BoogieIcfgContainer [2022-07-13 04:20:05,271 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-13 04:20:05,271 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 04:20:05,271 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 04:20:05,272 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 04:20:05,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:19:51" (3/4) ... [2022-07-13 04:20:05,274 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-13 04:20:05,274 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 04:20:05,275 INFO L158 Benchmark]: Toolchain (without parser) took 13761.95ms. Allocated memory was 102.8MB in the beginning and 151.0MB in the end (delta: 48.2MB). Free memory was 71.5MB in the beginning and 110.2MB in the end (delta: -38.7MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2022-07-13 04:20:05,275 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory was 56.7MB in the beginning and 56.6MB in the end (delta: 46.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 04:20:05,275 INFO L158 Benchmark]: CACSL2BoogieTranslator took 160.48ms. Allocated memory is still 102.8MB. Free memory was 71.4MB in the beginning and 79.1MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-13 04:20:05,275 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.83ms. Allocated memory is still 102.8MB. Free memory was 79.1MB in the beginning and 77.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 04:20:05,275 INFO L158 Benchmark]: Boogie Preprocessor took 16.42ms. Allocated memory is still 102.8MB. Free memory was 77.8MB in the beginning and 77.0MB in the end (delta: 863.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 04:20:05,276 INFO L158 Benchmark]: RCFGBuilder took 150.12ms. Allocated memory is still 102.8MB. Free memory was 77.0MB in the beginning and 68.2MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 04:20:05,276 INFO L158 Benchmark]: BuchiAutomizer took 13406.78ms. Allocated memory was 102.8MB in the beginning and 151.0MB in the end (delta: 48.2MB). Free memory was 68.2MB in the beginning and 110.2MB in the end (delta: -42.0MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. [2022-07-13 04:20:05,276 INFO L158 Benchmark]: Witness Printer took 2.81ms. Allocated memory is still 151.0MB. Free memory is still 110.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 04:20:05,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory was 56.7MB in the beginning and 56.6MB in the end (delta: 46.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 160.48ms. Allocated memory is still 102.8MB. Free memory was 71.4MB in the beginning and 79.1MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.83ms. Allocated memory is still 102.8MB. Free memory was 79.1MB in the beginning and 77.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.42ms. Allocated memory is still 102.8MB. Free memory was 77.8MB in the beginning and 77.0MB in the end (delta: 863.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 150.12ms. Allocated memory is still 102.8MB. Free memory was 77.0MB in the beginning and 68.2MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 13406.78ms. Allocated memory was 102.8MB in the beginning and 151.0MB in the end (delta: 48.2MB). Free memory was 68.2MB in the beginning and 110.2MB in the end (delta: -42.0MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. * Witness Printer took 2.81ms. Allocated memory is still 151.0MB. Free memory is still 110.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 13.3s and 7 iterations. TraceHistogramMax:12. Analysis of lassos took 9.3s. Construction of modules took 0.7s. Büchi inclusion checks took 2.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 250 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 595 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 570 mSDsluCounter, 595 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 382 mSDsCounter, 433 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1422 IncrementalHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 433 mSolverCounterUnsat, 213 mSDtfsCounter, 1422 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf93 smp79 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 51ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.8s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-13 04:20:05,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-13 04:20:05,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-13 04:20:05,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-13 04:20:05,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-13 04:20:06,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE