./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 f4b24e32 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-?-f4b24e3 [2022-07-14 16:00:12,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 16:00:12,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 16:00:12,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 16:00:12,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 16:00:12,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 16:00:12,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 16:00:12,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 16:00:12,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 16:00:12,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 16:00:12,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 16:00:12,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 16:00:12,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 16:00:12,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 16:00:12,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 16:00:12,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 16:00:12,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 16:00:12,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 16:00:12,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 16:00:12,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 16:00:12,423 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 16:00:12,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 16:00:12,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 16:00:12,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 16:00:12,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 16:00:12,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 16:00:12,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 16:00:12,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 16:00:12,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 16:00:12,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 16:00:12,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 16:00:12,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 16:00:12,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 16:00:12,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 16:00:12,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 16:00:12,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 16:00:12,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 16:00:12,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 16:00:12,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 16:00:12,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 16:00:12,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 16:00:12,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 16:00:12,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-07-14 16:00:12,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 16:00:12,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 16:00:12,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 16:00:12,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 16:00:12,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 16:00:12,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 16:00:12,461 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 16:00:12,461 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-14 16:00:12,461 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-14 16:00:12,462 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-14 16:00:12,462 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-14 16:00:12,462 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-14 16:00:12,462 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-14 16:00:12,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 16:00:12,463 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 16:00:12,463 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 16:00:12,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 16:00:12,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 16:00:12,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 16:00:12,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-14 16:00:12,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-14 16:00:12,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-14 16:00:12,464 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 16:00:12,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-14 16:00:12,464 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-14 16:00:12,464 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 16:00:12,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-14 16:00:12,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 16:00:12,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 16:00:12,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 16:00:12,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 16:00:12,466 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-14 16:00:12,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 [2022-07-14 16:00:12,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 16:00:12,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 16:00:12,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 16:00:12,718 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 16:00:12,718 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 16:00:12,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci02.c [2022-07-14 16:00:12,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44cbd2993/59c59639dc214a14b721bdcd68c83676/FLAG33bc114d0 [2022-07-14 16:00:13,101 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 16:00:13,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci02.c [2022-07-14 16:00:13,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44cbd2993/59c59639dc214a14b721bdcd68c83676/FLAG33bc114d0 [2022-07-14 16:00:13,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44cbd2993/59c59639dc214a14b721bdcd68c83676 [2022-07-14 16:00:13,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 16:00:13,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 16:00:13,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 16:00:13,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 16:00:13,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 16:00:13,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f60afb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13, skipping insertion in model container [2022-07-14 16:00:13,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 16:00:13,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 16:00:13,690 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] [2022-07-14 16:00:13,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 16:00:13,696 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 16:00:13,705 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] [2022-07-14 16:00:13,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 16:00:13,715 INFO L208 MainTranslator]: Completed translation [2022-07-14 16:00:13,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13 WrapperNode [2022-07-14 16:00:13,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 16:00:13,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 16:00:13,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 16:00:13,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 16:00:13,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,735 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-07-14 16:00:13,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 16:00:13,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 16:00:13,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 16:00:13,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 16:00:13,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 16:00:13,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 16:00:13,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 16:00:13,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 16:00:13,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (1/1) ... [2022-07-14 16:00:13,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:13,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:13,774 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) [2022-07-14 16:00:13,780 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 [2022-07-14 16:00:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-07-14 16:00:13,808 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-07-14 16:00:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 16:00:13,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 16:00:13,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 16:00:13,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 16:00:13,851 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 16:00:13,853 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 16:00:13,914 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 16:00:13,918 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 16:00:13,918 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-14 16:00:13,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 04:00:13 BoogieIcfgContainer [2022-07-14 16:00:13,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 16:00:13,920 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-14 16:00:13,920 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-14 16:00:13,925 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-14 16:00:13,925 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 16:00:13,925 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.07 04:00:13" (1/3) ... [2022-07-14 16:00:13,926 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@155cbd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 04:00:13, skipping insertion in model container [2022-07-14 16:00:13,926 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 16:00:13,927 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:13" (2/3) ... [2022-07-14 16:00:13,927 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@155cbd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 04:00:13, skipping insertion in model container [2022-07-14 16:00:13,927 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 16:00:13,927 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 04:00:13" (3/3) ... [2022-07-14 16:00:13,928 INFO L354 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2022-07-14 16:00:13,993 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-14 16:00:13,993 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-14 16:00:13,993 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-14 16:00:13,993 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-14 16:00:13,993 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-14 16:00:13,993 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-14 16:00:13,994 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-14 16:00:13,994 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-14 16:00:13,997 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) [2022-07-14 16:00:14,011 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:14,011 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:14,011 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:14,016 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-14 16:00:14,016 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:00:14,016 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-14 16:00:14,016 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) [2022-07-14 16:00:14,018 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:14,018 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:14,018 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:14,019 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-14 16:00:14,019 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:00:14,023 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 [2022-07-14 16:00:14,039 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 [2022-07-14 16:00:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash 42781, now seen corresponding path program 1 times [2022-07-14 16:00:14,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:14,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250566494] [2022-07-14 16:00:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:14,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,129 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 1 times [2022-07-14 16:00:14,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:14,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255771223] [2022-07-14 16:00:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:14,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,161 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:14,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash 854450357, now seen corresponding path program 1 times [2022-07-14 16:00:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:14,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160890159] [2022-07-14 16:00:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:14,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,188 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,200 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:14,284 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:14,285 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:14,285 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:14,285 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:14,285 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:00:14,286 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,286 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:14,286 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:14,286 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2022-07-14 16:00:14,286 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:14,286 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:14,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,328 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,377 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:14,377 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:00:14,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,380 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) [2022-07-14 16:00:14,381 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 [2022-07-14 16:00:14,383 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:14,383 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:14,414 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:14,415 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:14,432 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 [2022-07-14 16:00:14,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,433 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) [2022-07-14 16:00:14,434 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 [2022-07-14 16:00:14,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:14,436 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:14,459 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:14,459 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:14,476 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 [2022-07-14 16:00:14,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,478 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) [2022-07-14 16:00:14,480 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 [2022-07-14 16:00:14,482 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:14,482 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:14,491 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:14,491 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:14,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2022-07-14 16:00:14,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,509 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) [2022-07-14 16:00:14,510 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 [2022-07-14 16:00:14,511 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:14,511 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:14,538 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 [2022-07-14 16:00:14,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,539 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) [2022-07-14 16:00:14,540 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 [2022-07-14 16:00:14,542 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:00:14,542 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:14,610 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:00:14,616 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 [2022-07-14 16:00:14,616 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:14,616 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:14,616 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:14,616 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:14,616 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:00:14,616 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,616 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:14,617 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:14,617 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2022-07-14 16:00:14,617 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:14,617 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:14,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,639 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,681 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:14,684 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:00:14,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,686 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) [2022-07-14 16:00:14,704 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 [2022-07-14 16:00:14,705 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 [2022-07-14 16:00:14,711 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:14,711 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:14,711 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:14,711 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:14,712 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:14,713 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:14,713 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:14,729 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:14,757 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 [2022-07-14 16:00:14,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,759 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) [2022-07-14 16:00:14,760 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 [2022-07-14 16:00:14,761 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 [2022-07-14 16:00:14,767 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:14,767 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:14,767 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:14,767 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:14,767 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:14,768 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:14,768 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:14,779 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:14,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:14,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,798 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) [2022-07-14 16:00:14,798 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 [2022-07-14 16:00:14,799 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 [2022-07-14 16:00:14,805 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:14,805 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:14,805 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:14,805 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:14,805 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:14,806 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:14,806 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:14,811 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:14,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:14,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,829 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) [2022-07-14 16:00:14,832 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 [2022-07-14 16:00:14,832 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 [2022-07-14 16:00:14,840 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:14,841 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:14,841 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:14,841 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:14,841 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:14,842 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:14,842 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:14,853 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:00:14,856 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:00:14,856 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:00:14,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,858 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) [2022-07-14 16:00:14,859 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 [2022-07-14 16:00:14,865 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:00:14,865 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:00:14,865 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:00:14,865 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2022-07-14 16:00:14,881 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 [2022-07-14 16:00:14,887 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:00:14,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 16:00:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:14,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:14,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:14,995 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 [2022-07-14 16:00:14,995 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) [2022-07-14 16:00:15,084 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. [2022-07-14 16:00:15,090 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 [2022-07-14 16:00:15,094 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) [2022-07-14 16:00:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2022-07-14 16:00:15,096 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2022-07-14 16:00:15,096 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:15,096 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2022-07-14 16:00:15,097 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:15,097 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2022-07-14 16:00:15,097 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:15,097 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2022-07-14 16:00:15,100 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:15,103 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 25 states and 34 transitions. [2022-07-14 16:00:15,104 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2022-07-14 16:00:15,104 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-07-14 16:00:15,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2022-07-14 16:00:15,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:15,104 INFO L369 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-14 16:00:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2022-07-14 16:00:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2022-07-14 16:00:15,121 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) [2022-07-14 16:00:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-14 16:00:15,122 INFO L392 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-14 16:00:15,122 INFO L374 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-14 16:00:15,122 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-14 16:00:15,122 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2022-07-14 16:00:15,123 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:15,123 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:15,123 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:15,124 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:15,124 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:15,124 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 [2022-07-14 16:00:15,124 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 [2022-07-14 16:00:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:15,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1391758089, now seen corresponding path program 1 times [2022-07-14 16:00:15,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:15,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59031970] [2022-07-14 16:00:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:15,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 16:00:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 16:00:15,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:15,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59031970] [2022-07-14 16:00:15,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59031970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 16:00:15,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 16:00:15,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 16:00:15,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326941299] [2022-07-14 16:00:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 16:00:15,179 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-14 16:00:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:15,179 INFO L85 PathProgramCache]: Analyzing trace with hash 924369961, now seen corresponding path program 1 times [2022-07-14 16:00:15,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:15,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062013881] [2022-07-14 16:00:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:15,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-14 16:00:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 16:00:15,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062013881] [2022-07-14 16:00:15,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062013881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 16:00:15,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 16:00:15,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 16:00:15,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696832600] [2022-07-14 16:00:15,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 16:00:15,236 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-14 16:00:15,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:00:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 16:00:15,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 16:00:15,240 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) [2022-07-14 16:00:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:00:15,300 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-14 16:00:15,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 16:00:15,301 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2022-07-14 16:00:15,306 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:15,309 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2022-07-14 16:00:15,310 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2022-07-14 16:00:15,310 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2022-07-14 16:00:15,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2022-07-14 16:00:15,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:15,311 INFO L369 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-14 16:00:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2022-07-14 16:00:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-14 16:00:15,315 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) [2022-07-14 16:00:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-14 16:00:15,320 INFO L392 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-14 16:00:15,320 INFO L374 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-14 16:00:15,320 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-14 16:00:15,320 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2022-07-14 16:00:15,323 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:15,323 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:15,323 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:15,324 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:15,324 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:15,324 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 [2022-07-14 16:00:15,324 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 [2022-07-14 16:00:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash 194852287, now seen corresponding path program 1 times [2022-07-14 16:00:15,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:15,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100765795] [2022-07-14 16:00:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:15,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-14 16:00:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:15,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100765795] [2022-07-14 16:00:15,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100765795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:00:15,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870474667] [2022-07-14 16:00:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:15,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:00:15,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,384 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) [2022-07-14 16:00:15,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 16:00:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 16:00:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:15,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:00:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:15,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870474667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:00:15,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:00:15,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-14 16:00:15,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936827700] [2022-07-14 16:00:15,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:00:15,559 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-14 16:00:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 1 times [2022-07-14 16:00:15,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:15,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87380614] [2022-07-14 16:00:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:15,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:15,564 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:15,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:15,601 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 [2022-07-14 16:00:15,678 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:15,679 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:15,679 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:15,679 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:15,679 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:00:15,679 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,679 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:15,679 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:15,679 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2022-07-14 16:00:15,679 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:15,679 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:15,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:15,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:15,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:15,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:15,720 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:15,720 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:00:15,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,721 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) [2022-07-14 16:00:15,722 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 [2022-07-14 16:00:15,724 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:15,724 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:15,746 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:15,746 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:15,762 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 [2022-07-14 16:00:15,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,764 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) [2022-07-14 16:00:15,765 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 [2022-07-14 16:00:15,766 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:15,767 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:15,775 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:15,775 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:15,791 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 [2022-07-14 16:00:15,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,792 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) [2022-07-14 16:00:15,793 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 [2022-07-14 16:00:15,852 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:15,852 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:15,861 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:15,861 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=1} Honda state: {fibonacci_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:15,877 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 [2022-07-14 16:00:15,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,878 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) [2022-07-14 16:00:15,879 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 [2022-07-14 16:00:15,880 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:15,880 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:15,914 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 [2022-07-14 16:00:15,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,915 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) [2022-07-14 16:00:15,916 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 [2022-07-14 16:00:15,917 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:00:15,918 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:16,250 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:00:16,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:16,258 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:16,258 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:16,258 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:16,258 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:16,258 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:00:16,258 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:16,258 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:16,258 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:16,258 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2022-07-14 16:00:16,258 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:16,258 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:16,259 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:16,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:16,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:16,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:16,304 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:16,304 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:00:16,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:16,308 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) [2022-07-14 16:00:16,316 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 [2022-07-14 16:00:16,317 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 [2022-07-14 16:00:16,323 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:16,323 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:16,323 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:16,323 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:16,323 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:16,327 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:16,328 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:16,329 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:16,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:16,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:16,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:16,346 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) [2022-07-14 16:00:16,349 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 [2022-07-14 16:00:16,349 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 [2022-07-14 16:00:16,359 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:16,359 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:16,360 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:16,360 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:16,360 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:16,360 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:16,360 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:16,369 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:16,432 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 [2022-07-14 16:00:16,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:16,434 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) [2022-07-14 16:00:16,437 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 [2022-07-14 16:00:16,439 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 [2022-07-14 16:00:16,446 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:16,446 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:16,446 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:16,446 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:16,446 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:16,447 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:16,447 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:16,451 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:16,471 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 [2022-07-14 16:00:16,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:16,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:16,472 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) [2022-07-14 16:00:16,475 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 [2022-07-14 16:00:16,475 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 [2022-07-14 16:00:16,481 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:16,482 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:16,482 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:16,482 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:16,482 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:16,483 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:16,483 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:16,497 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:00:16,500 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:00:16,501 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:00:16,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:16,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:16,503 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) [2022-07-14 16:00:16,503 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 [2022-07-14 16:00:16,504 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:00:16,504 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:00:16,505 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:00:16,505 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-14 16:00:16,521 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 [2022-07-14 16:00:16,521 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:00:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:16,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 16:00:16,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:16,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 16:00:16,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:16,693 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 [2022-07-14 16:00:16,693 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) [2022-07-14 16:00:16,856 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 [2022-07-14 16:00:16,879 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. [2022-07-14 16:00:16,880 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 [2022-07-14 16:00:16,881 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) [2022-07-14 16:00:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2022-07-14 16:00:16,882 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2022-07-14 16:00:16,882 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:16,882 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2022-07-14 16:00:16,882 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:16,882 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2022-07-14 16:00:16,883 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:16,883 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2022-07-14 16:00:16,892 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-14 16:00:16,895 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2022-07-14 16:00:16,895 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2022-07-14 16:00:16,895 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2022-07-14 16:00:16,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2022-07-14 16:00:16,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:16,896 INFO L369 hiAutomatonCegarLoop]: Abstraction has 108 states and 152 transitions. [2022-07-14 16:00:16,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2022-07-14 16:00:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-14 16:00:16,903 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) [2022-07-14 16:00:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2022-07-14 16:00:16,904 INFO L392 hiAutomatonCegarLoop]: Abstraction has 94 states and 126 transitions. [2022-07-14 16:00:16,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:00:16,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 16:00:16,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-14 16:00:16,905 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) [2022-07-14 16:00:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:00:16,998 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2022-07-14 16:00:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 16:00:16,999 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2022-07-14 16:00:17,001 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-14 16:00:17,003 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2022-07-14 16:00:17,003 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2022-07-14 16:00:17,003 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2022-07-14 16:00:17,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2022-07-14 16:00:17,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:17,004 INFO L369 hiAutomatonCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-07-14 16:00:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2022-07-14 16:00:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2022-07-14 16:00:17,011 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) [2022-07-14 16:00:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2022-07-14 16:00:17,012 INFO L392 hiAutomatonCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-14 16:00:17,012 INFO L374 stractBuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-14 16:00:17,012 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-14 16:00:17,012 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2022-07-14 16:00:17,013 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-14 16:00:17,013 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:17,013 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:17,017 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:17,017 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:17,017 INFO L752 eck$LassoCheckResult]: Stem: 805#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 806#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 9; 788#L29 call main_#t~ret6#1 := fibonacci(main_~x~0#1);< 814#fibonacciENTRY ~n := #in~n; 799#L17 assume !(~n < 1); 800#L19 assume !(1 == ~n); 795#L22 call #t~ret4 := fibonacci(~n - 1);< 794#fibonacciENTRY ~n := #in~n; 796#L17 assume !(~n < 1); 852#L19 assume !(1 == ~n); 803#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 850#L17 assume !(~n < 1); 848#L19 assume !(1 == ~n); 843#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 850#L17 assume !(~n < 1); 848#L19 assume !(1 == ~n); 843#L22 call #t~ret4 := fibonacci(~n - 1);< 804#fibonacciENTRY ~n := #in~n; 851#L17 assume !(~n < 1); 849#L19 assume 1 == ~n;#res := 1; 847#fibonacciFINAL assume true; 846#fibonacciEXIT >#29#return; 791#L22-1 call #t~ret5 := fibonacci(~n - 2);< 844#fibonacciENTRY ~n := #in~n; 797#L17 assume ~n < 1;#res := 0; 798#fibonacciFINAL assume true; 888#fibonacciEXIT >#31#return; 887#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 885#fibonacciFINAL assume true; 877#fibonacciEXIT >#29#return; 819#L22-1 [2022-07-14 16:00:17,018 INFO L754 eck$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 [2022-07-14 16:00:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1460678817, now seen corresponding path program 1 times [2022-07-14 16:00:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:17,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826311096] [2022-07-14 16:00:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:17,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-14 16:00:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:17,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:00:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:17,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:00:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 16:00:17,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:17,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826311096] [2022-07-14 16:00:17,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826311096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:00:17,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459145636] [2022-07-14 16:00:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:17,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:00:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,126 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) [2022-07-14 16:00:17,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 16:00:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:17,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 16:00:17,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 16:00:17,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:00:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 16:00:17,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459145636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:00:17,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:00:17,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2022-07-14 16:00:17,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903583675] [2022-07-14 16:00:17,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:00:17,424 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-14 16:00:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 2 times [2022-07-14 16:00:17,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:17,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490482469] [2022-07-14 16:00:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:17,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:17,428 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:17,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:17,516 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:17,516 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:17,516 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:17,516 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:17,516 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:00:17,516 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,516 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:17,517 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:17,517 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2022-07-14 16:00:17,517 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:17,517 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:17,517 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,548 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:17,548 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:00:17,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,549 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) [2022-07-14 16:00:17,553 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:17,553 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:17,553 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 [2022-07-14 16:00:17,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:17,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,578 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) [2022-07-14 16:00:17,579 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 [2022-07-14 16:00:17,580 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:00:17,580 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:17,916 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:00:17,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:17,921 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:17,921 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:17,921 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:17,921 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:17,921 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:00:17,921 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,921 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:17,921 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:17,922 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration4_Loop [2022-07-14 16:00:17,922 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:17,922 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:17,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,935 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,969 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:17,969 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:00:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,970 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) [2022-07-14 16:00:17,971 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 [2022-07-14 16:00:17,972 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 [2022-07-14 16:00:17,978 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:17,978 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:17,978 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:17,978 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:17,978 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:17,979 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:17,979 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:17,980 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:17,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2022-07-14 16:00:17,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,997 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) [2022-07-14 16:00:17,997 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 [2022-07-14 16:00:17,999 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 [2022-07-14 16:00:18,005 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:18,005 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:18,005 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:18,005 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:18,005 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:18,005 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:18,005 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:18,023 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:18,038 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 [2022-07-14 16:00:18,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:18,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:18,040 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) [2022-07-14 16:00:18,042 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 [2022-07-14 16:00:18,042 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 [2022-07-14 16:00:18,048 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:18,048 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:18,048 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:18,048 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:18,048 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:18,049 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:18,049 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:18,056 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:00:18,058 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:00:18,059 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:00:18,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:18,060 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) [2022-07-14 16:00:18,062 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 [2022-07-14 16:00:18,062 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:00:18,062 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:00:18,062 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:00:18,062 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-14 16:00:18,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:18,079 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:00:18,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 16:00:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 16:00:18,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:18,336 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 [2022-07-14 16:00:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:18,375 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 [2022-07-14 16:00:18,375 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) [2022-07-14 16:00:18,515 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. [2022-07-14 16:00:18,519 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 [2022-07-14 16:00:18,521 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) [2022-07-14 16:00:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2022-07-14 16:00:18,522 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 32 letters. Loop has 10 letters. [2022-07-14 16:00:18,522 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:18,523 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:00:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 16:00:18,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 16:00:18,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:18,757 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 [2022-07-14 16:00:18,757 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) [2022-07-14 16:00:18,865 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. [2022-07-14 16:00:18,867 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 [2022-07-14 16:00:18,867 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) [2022-07-14 16:00:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2022-07-14 16:00:18,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 32 letters. Loop has 10 letters. [2022-07-14 16:00:18,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:18,868 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:00:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 16:00:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:19,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 16:00:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:19,100 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 [2022-07-14 16:00:19,100 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) [2022-07-14 16:00:19,278 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. [2022-07-14 16:00:19,279 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 [2022-07-14 16:00:19,279 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) [2022-07-14 16:00:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2022-07-14 16:00:19,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 32 letters. Loop has 10 letters. [2022-07-14 16:00:19,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:19,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 42 letters. Loop has 10 letters. [2022-07-14 16:00:19,281 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:19,281 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 32 letters. Loop has 20 letters. [2022-07-14 16:00:19,281 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:19,281 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 858 states and 1136 transitions. [2022-07-14 16:00:19,290 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2022-07-14 16:00:19,306 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 858 states to 430 states and 620 transitions. [2022-07-14 16:00:19,306 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 163 [2022-07-14 16:00:19,308 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 188 [2022-07-14 16:00:19,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 430 states and 620 transitions. [2022-07-14 16:00:19,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:19,309 INFO L369 hiAutomatonCegarLoop]: Abstraction has 430 states and 620 transitions. [2022-07-14 16:00:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states and 620 transitions. [2022-07-14 16:00:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 352. [2022-07-14 16:00:19,333 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) [2022-07-14 16:00:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 485 transitions. [2022-07-14 16:00:19,336 INFO L392 hiAutomatonCegarLoop]: Abstraction has 352 states and 485 transitions. [2022-07-14 16:00:19,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:00:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 16:00:19,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-14 16:00:19,337 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) [2022-07-14 16:00:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:00:19,625 INFO L93 Difference]: Finished difference Result 683 states and 994 transitions. [2022-07-14 16:00:19,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 16:00:19,626 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 683 states and 994 transitions. [2022-07-14 16:00:19,634 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-14 16:00:19,641 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 683 states to 652 states and 949 transitions. [2022-07-14 16:00:19,642 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 282 [2022-07-14 16:00:19,642 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 285 [2022-07-14 16:00:19,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 652 states and 949 transitions. [2022-07-14 16:00:19,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:19,642 INFO L369 hiAutomatonCegarLoop]: Abstraction has 652 states and 949 transitions. [2022-07-14 16:00:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states and 949 transitions. [2022-07-14 16:00:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 622. [2022-07-14 16:00:19,664 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) [2022-07-14 16:00:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 912 transitions. [2022-07-14 16:00:19,671 INFO L392 hiAutomatonCegarLoop]: Abstraction has 622 states and 912 transitions. [2022-07-14 16:00:19,671 INFO L374 stractBuchiCegarLoop]: Abstraction has 622 states and 912 transitions. [2022-07-14 16:00:19,671 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-14 16:00:19,671 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 622 states and 912 transitions. [2022-07-14 16:00:19,674 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-14 16:00:19,675 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:19,675 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:19,676 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:19,676 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:00:19,676 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 [2022-07-14 16:00:19,676 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 [2022-07-14 16:00:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:19,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1413084929, now seen corresponding path program 1 times [2022-07-14 16:00:19,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:19,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845511506] [2022-07-14 16:00:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:19,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:19,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-14 16:00:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:00:19,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:19,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845511506] [2022-07-14 16:00:19,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845511506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:00:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106422014] [2022-07-14 16:00:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:19,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:00:19,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:19,852 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) [2022-07-14 16:00:19,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-14 16:00:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:19,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 16:00:19,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:00:19,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:00:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 62 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:00:20,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106422014] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:00:20,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:00:20,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-07-14 16:00:20,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343267178] [2022-07-14 16:00:20,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:00:20,055 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-14 16:00:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 2 times [2022-07-14 16:00:20,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:20,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546313799] [2022-07-14 16:00:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:20,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:20,058 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:20,060 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:20,083 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:20,083 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:20,083 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:20,083 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:20,084 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:00:20,084 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:20,084 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:20,084 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:20,084 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2022-07-14 16:00:20,084 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:20,084 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:20,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,091 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,126 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:20,127 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:00:20,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:20,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:20,128 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) [2022-07-14 16:00:20,129 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 [2022-07-14 16:00:20,130 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:20,130 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:20,151 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:20,151 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:20,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:20,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:20,172 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) [2022-07-14 16:00:20,182 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:20,182 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:20,187 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 [2022-07-14 16:00:20,229 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 [2022-07-14 16:00:20,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:20,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:20,230 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) [2022-07-14 16:00:20,232 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 [2022-07-14 16:00:20,233 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:00:20,233 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:20,270 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:00:20,273 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 [2022-07-14 16:00:20,273 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:20,273 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:20,273 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:20,273 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:20,273 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:00:20,273 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:20,273 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:20,273 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:20,273 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2022-07-14 16:00:20,273 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:20,273 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:20,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:20,313 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:20,313 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:00:20,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:20,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:20,317 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) [2022-07-14 16:00:20,319 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 [2022-07-14 16:00:20,324 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 [2022-07-14 16:00:20,325 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:20,325 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:20,325 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:20,325 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:20,325 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:20,327 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:20,328 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:20,336 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:20,354 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 [2022-07-14 16:00:20,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:20,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:20,355 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) [2022-07-14 16:00:20,356 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 [2022-07-14 16:00:20,358 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 [2022-07-14 16:00:20,364 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:20,364 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:20,364 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:20,364 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:20,364 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:20,365 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:20,365 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:20,379 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:00:20,381 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-14 16:00:20,381 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-14 16:00:20,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:20,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:20,384 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) [2022-07-14 16:00:20,385 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 [2022-07-14 16:00:20,386 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:00:20,386 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:00:20,386 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:00:20,386 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2022-07-14 16:00:20,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:20,406 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:00:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:20,557 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 [2022-07-14 16:00:20,558 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) [2022-07-14 16:00:20,609 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. [2022-07-14 16:00:20,610 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 [2022-07-14 16:00:20,610 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) [2022-07-14 16:00:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-14 16:00:20,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 45 letters. Loop has 4 letters. [2022-07-14 16:00:20,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:20,611 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:00:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:20,775 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 [2022-07-14 16:00:20,776 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) [2022-07-14 16:00:20,826 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. [2022-07-14 16:00:20,826 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 [2022-07-14 16:00:20,827 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) [2022-07-14 16:00:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-14 16:00:20,827 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 45 letters. Loop has 4 letters. [2022-07-14 16:00:20,828 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:20,828 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:00:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:20,891 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 [2022-07-14 16:00:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:20,991 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 [2022-07-14 16:00:20,991 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) [2022-07-14 16:00:21,056 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. [2022-07-14 16:00:21,056 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 [2022-07-14 16:00:21,057 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) [2022-07-14 16:00:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2022-07-14 16:00:21,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 45 letters. Loop has 4 letters. [2022-07-14 16:00:21,057 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:21,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-14 16:00:21,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:21,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 45 letters. Loop has 8 letters. [2022-07-14 16:00:21,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:21,058 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 839 states and 1152 transitions. [2022-07-14 16:00:21,065 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-14 16:00:21,071 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 839 states to 684 states and 985 transitions. [2022-07-14 16:00:21,071 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2022-07-14 16:00:21,072 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 250 [2022-07-14 16:00:21,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 684 states and 985 transitions. [2022-07-14 16:00:21,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:21,072 INFO L369 hiAutomatonCegarLoop]: Abstraction has 684 states and 985 transitions. [2022-07-14 16:00:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states and 985 transitions. [2022-07-14 16:00:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 654. [2022-07-14 16:00:21,085 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) [2022-07-14 16:00:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 949 transitions. [2022-07-14 16:00:21,090 INFO L392 hiAutomatonCegarLoop]: Abstraction has 654 states and 949 transitions. [2022-07-14 16:00:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:00:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 16:00:21,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-07-14 16:00:21,091 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) [2022-07-14 16:00:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:00:21,314 INFO L93 Difference]: Finished difference Result 799 states and 1195 transitions. [2022-07-14 16:00:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 16:00:21,315 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 799 states and 1195 transitions. [2022-07-14 16:00:21,322 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-14 16:00:21,329 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 799 states to 778 states and 1163 transitions. [2022-07-14 16:00:21,329 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 289 [2022-07-14 16:00:21,329 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 292 [2022-07-14 16:00:21,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 778 states and 1163 transitions. [2022-07-14 16:00:21,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:21,330 INFO L369 hiAutomatonCegarLoop]: Abstraction has 778 states and 1163 transitions. [2022-07-14 16:00:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states and 1163 transitions. [2022-07-14 16:00:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 710. [2022-07-14 16:00:21,370 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) [2022-07-14 16:00:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1031 transitions. [2022-07-14 16:00:21,373 INFO L392 hiAutomatonCegarLoop]: Abstraction has 710 states and 1031 transitions. [2022-07-14 16:00:21,373 INFO L374 stractBuchiCegarLoop]: Abstraction has 710 states and 1031 transitions. [2022-07-14 16:00:21,373 INFO L287 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-07-14 16:00:21,373 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 710 states and 1031 transitions. [2022-07-14 16:00:21,376 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-14 16:00:21,376 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:21,376 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:21,379 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [12, 12, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:21,379 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:00:21,379 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; 9312#L17 assume !(~n < 1); 9308#L19 assume !(1 == ~n); 9278#L22 call #t~ret4 := fibonacci(~n - 1);< 9295#fibonacciENTRY ~n := #in~n; 9660#L17 assume !(~n < 1); 9659#L19 assume !(1 == ~n); 9281#L22 call #t~ret4 := fibonacci(~n - 1);< 9282#fibonacciENTRY ~n := #in~n; 9372#L17 assume !(~n < 1); 9370#L19 assume !(1 == ~n); 9316#L22 call #t~ret4 := fibonacci(~n - 1);< 9318#fibonacciENTRY ~n := #in~n; 9618#L17 assume !(~n < 1); 9617#L19 assume !(1 == ~n); 9365#L22 call #t~ret4 := fibonacci(~n - 1);< 9367#fibonacciENTRY ~n := #in~n; 9620#L17 assume !(~n < 1); 9619#L19 assume !(1 == ~n); 9325#L22 call #t~ret4 := fibonacci(~n - 1);< 9369#fibonacciENTRY ~n := #in~n; 9459#L17 assume !(~n < 1); 9450#L19 assume !(1 == ~n); 9441#L22 call #t~ret4 := fibonacci(~n - 1);< 9446#fibonacciENTRY ~n := #in~n; 9544#L17 assume !(~n < 1); 9543#L19 assume !(1 == ~n); 9383#L22 call #t~ret4 := fibonacci(~n - 1);< 9489#fibonacciENTRY ~n := #in~n; 9553#L17 assume !(~n < 1); 9490#L19 assume !(1 == ~n); 9380#L22 call #t~ret4 := fibonacci(~n - 1);< 9489#fibonacciENTRY ~n := #in~n; 9556#L17 assume !(~n < 1); 9750#L19 assume 1 == ~n;#res := 1; 9749#fibonacciFINAL assume true; 9747#fibonacciEXIT >#29#return; 9743#L22-1 call #t~ret5 := fibonacci(~n - 2);< 9744#fibonacciENTRY ~n := #in~n; 9869#L17 assume !(~n < 1); 9764#L19 assume !(1 == ~n); 9766#L22 call #t~ret4 := fibonacci(~n - 1);< 9804#fibonacciENTRY ~n := #in~n; 9851#L17 assume !(~n < 1); 9849#L19 assume !(1 == ~n); 9208#L22 call #t~ret4 := fibonacci(~n - 1);< 9217#fibonacciENTRY ~n := #in~n; 9218#L17 assume !(~n < 1); 9861#L19 assume !(1 == ~n); 9209#L22 [2022-07-14 16:00:21,379 INFO L754 eck$LassoCheckResult]: Loop: 9209#L22 call #t~ret4 := fibonacci(~n - 1);< 9217#fibonacciENTRY ~n := #in~n; 9218#L17 assume !(~n < 1); 9861#L19 assume !(1 == ~n); 9209#L22 [2022-07-14 16:00:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1648910477, now seen corresponding path program 2 times [2022-07-14 16:00:21,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:21,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687847667] [2022-07-14 16:00:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-14 16:00:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 16:00:21,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:21,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687847667] [2022-07-14 16:00:21,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687847667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:00:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009560950] [2022-07-14 16:00:21,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 16:00:21,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:00:21,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:21,552 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) [2022-07-14 16:00:21,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-14 16:00:21,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 16:00:21,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 16:00:21,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 16:00:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 16:00:21,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:00:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 213 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 16:00:21,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009560950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:00:21,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:00:21,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-07-14 16:00:21,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143418131] [2022-07-14 16:00:21,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:00:21,682 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-14 16:00:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 3 times [2022-07-14 16:00:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:21,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234988438] [2022-07-14 16:00:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:21,688 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:21,692 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:21,721 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:21,721 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:21,721 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:21,721 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:21,722 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:00:21,722 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:21,722 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:21,722 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:21,722 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2022-07-14 16:00:21,722 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:21,722 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:21,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:21,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:21,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:21,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:21,769 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:21,770 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:00:21,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:21,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:21,780 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) [2022-07-14 16:00:21,790 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 [2022-07-14 16:00:21,791 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:21,791 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:21,797 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:21,797 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:21,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2022-07-14 16:00:21,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:21,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:21,822 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) [2022-07-14 16:00:21,822 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 [2022-07-14 16:00:21,823 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:21,823 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:21,830 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:21,831 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:21,854 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 [2022-07-14 16:00:21,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:21,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:21,856 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) [2022-07-14 16:00:21,857 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 [2022-07-14 16:00:21,858 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:21,858 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:21,864 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:21,864 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:21,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:21,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:21,881 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) [2022-07-14 16:00:21,882 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 [2022-07-14 16:00:21,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:21,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:21,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Ended with exit code 0 [2022-07-14 16:00:21,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:21,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:21,922 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) [2022-07-14 16:00:21,923 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 [2022-07-14 16:00:21,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:00:21,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:26,316 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:00:26,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:26,320 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:26,320 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:26,320 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:26,320 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:26,320 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:00:26,320 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:26,320 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:26,320 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:26,320 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2022-07-14 16:00:26,321 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:26,321 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:26,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:26,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:26,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:26,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:26,365 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:26,366 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:00:26,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:26,368 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) [2022-07-14 16:00:26,369 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 [2022-07-14 16:00:26,370 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 [2022-07-14 16:00:26,376 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:26,376 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:26,376 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:26,376 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:26,376 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:26,376 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:26,376 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:26,377 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:26,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2022-07-14 16:00:26,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:26,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:26,394 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) [2022-07-14 16:00:26,395 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 [2022-07-14 16:00:26,396 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 [2022-07-14 16:00:26,401 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:26,401 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:26,402 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:26,402 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:26,402 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:26,402 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:26,402 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:26,403 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:26,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:26,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:26,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:26,420 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) [2022-07-14 16:00:26,420 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 [2022-07-14 16:00:26,422 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 [2022-07-14 16:00:26,427 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:26,428 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:26,428 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:26,428 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:26,428 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:26,429 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:26,429 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:26,439 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:00:26,441 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:00:26,441 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:00:26,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:26,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:26,442 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) [2022-07-14 16:00:26,443 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 [2022-07-14 16:00:26,446 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:00:26,446 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:00:26,446 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:00:26,446 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-14 16:00:26,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2022-07-14 16:00:26,463 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:00:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:26,543 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 [2022-07-14 16:00:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 16:00:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:26,651 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 [2022-07-14 16:00:26,651 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) [2022-07-14 16:00:26,692 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. [2022-07-14 16:00:26,692 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 [2022-07-14 16:00:26,693 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) [2022-07-14 16:00:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2022-07-14 16:00:26,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 52 letters. Loop has 4 letters. [2022-07-14 16:00:26,694 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:26,694 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:00:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:26,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 16:00:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:26,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:26,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:26,842 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 [2022-07-14 16:00:26,842 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) [2022-07-14 16:00:26,899 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. [2022-07-14 16:00:26,899 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 [2022-07-14 16:00:26,900 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) [2022-07-14 16:00:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2022-07-14 16:00:26,900 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 4 letters. [2022-07-14 16:00:26,900 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:26,900 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2022-07-14 16:00:26,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:26,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 8 letters. [2022-07-14 16:00:26,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:26,902 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 964 states and 1378 transitions. [2022-07-14 16:00:26,911 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-14 16:00:26,923 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 964 states to 888 states and 1297 transitions. [2022-07-14 16:00:26,924 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 290 [2022-07-14 16:00:26,924 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 318 [2022-07-14 16:00:26,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 888 states and 1297 transitions. [2022-07-14 16:00:26,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:26,927 INFO L369 hiAutomatonCegarLoop]: Abstraction has 888 states and 1297 transitions. [2022-07-14 16:00:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states and 1297 transitions. [2022-07-14 16:00:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 875. [2022-07-14 16:00:26,955 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) [2022-07-14 16:00:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1280 transitions. [2022-07-14 16:00:26,958 INFO L392 hiAutomatonCegarLoop]: Abstraction has 875 states and 1280 transitions. [2022-07-14 16:00:26,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:00:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 16:00:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-07-14 16:00:26,959 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) [2022-07-14 16:00:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:00:27,191 INFO L93 Difference]: Finished difference Result 475 states and 560 transitions. [2022-07-14 16:00:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 16:00:27,191 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 475 states and 560 transitions. [2022-07-14 16:00:27,194 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-14 16:00:27,194 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 475 states to 0 states and 0 transitions. [2022-07-14 16:00:27,194 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-14 16:00:27,194 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-14 16:00:27,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-14 16:00:27,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-14 16:00:27,195 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:00:27,195 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:00:27,195 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:00:27,195 INFO L287 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2022-07-14 16:00:27,195 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-14 16:00:27,195 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-14 16:00:27,195 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-14 16:00:27,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 14.07 04:00:27 BoogieIcfgContainer [2022-07-14 16:00:27,200 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-14 16:00:27,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 16:00:27,201 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 16:00:27,201 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 16:00:27,201 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 04:00:13" (3/4) ... [2022-07-14 16:00:27,203 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-14 16:00:27,203 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 16:00:27,204 INFO L158 Benchmark]: Toolchain (without parser) took 13663.96ms. Allocated memory was 86.0MB in the beginning and 151.0MB in the end (delta: 65.0MB). Free memory was 51.8MB in the beginning and 95.3MB in the end (delta: -43.5MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. [2022-07-14 16:00:27,204 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 86.0MB. Free memory was 55.8MB in the beginning and 55.8MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:00:27,204 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.94ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.6MB in the beginning and 81.7MB in the end (delta: -30.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 16:00:27,204 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.68ms. Allocated memory is still 104.9MB. Free memory was 81.7MB in the beginning and 80.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 16:00:27,205 INFO L158 Benchmark]: Boogie Preprocessor took 12.45ms. Allocated memory is still 104.9MB. Free memory was 80.2MB in the beginning and 79.6MB in the end (delta: 600.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:00:27,205 INFO L158 Benchmark]: RCFGBuilder took 171.12ms. Allocated memory is still 104.9MB. Free memory was 79.0MB in the beginning and 70.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 16:00:27,205 INFO L158 Benchmark]: BuchiAutomizer took 13279.88ms. Allocated memory was 104.9MB in the beginning and 151.0MB in the end (delta: 46.1MB). Free memory was 70.7MB in the beginning and 95.3MB in the end (delta: -24.6MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. [2022-07-14 16:00:27,205 INFO L158 Benchmark]: Witness Printer took 2.75ms. Allocated memory is still 151.0MB. Free memory is still 95.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:00:27,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 86.0MB. Free memory was 55.8MB in the beginning and 55.8MB in the end (delta: 25.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 173.94ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.6MB in the beginning and 81.7MB in the end (delta: -30.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.68ms. Allocated memory is still 104.9MB. Free memory was 81.7MB in the beginning and 80.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.45ms. Allocated memory is still 104.9MB. Free memory was 80.2MB in the beginning and 79.6MB in the end (delta: 600.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 171.12ms. Allocated memory is still 104.9MB. Free memory was 79.0MB in the beginning and 70.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 13279.88ms. Allocated memory was 104.9MB in the beginning and 151.0MB in the end (delta: 46.1MB). Free memory was 70.7MB in the beginning and 95.3MB in the end (delta: -24.6MB). Peak memory consumption was 23.3MB. Max. memory is 16.1GB. * Witness Printer took 2.75ms. Allocated memory is still 151.0MB. Free memory is still 95.3MB. 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 13.2s and 7 iterations. TraceHistogramMax:12. Analysis of lassos took 9.0s. Construction of modules took 0.7s. Büchi inclusion checks took 3.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.2s 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, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 570 mSDsluCounter, 595 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 382 mSDsCounter, 438 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1414 IncrementalHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 438 mSolverCounterUnsat, 213 mSDtfsCounter, 1414 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: 44ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.6s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-14 16:00:27,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:27,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-14 16:00:27,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:27,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-14 16:00:28,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE