./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 14cfbc3a2ba2bfe3a03d4d1ebff24b0baf1851f06dbbd2468b59e09322e4ce16 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 01:29:16,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 01:29:16,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 01:29:16,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 01:29:16,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 01:29:16,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 01:29:16,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 01:29:16,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 01:29:16,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 01:29:16,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 01:29:16,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 01:29:16,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 01:29:16,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 01:29:16,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 01:29:16,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 01:29:16,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 01:29:16,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 01:29:16,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 01:29:16,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 01:29:16,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 01:29:16,799 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 01:29:16,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 01:29:16,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 01:29:16,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 01:29:16,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 01:29:16,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 01:29:16,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 01:29:16,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 01:29:16,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 01:29:16,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 01:29:16,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 01:29:16,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 01:29:16,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 01:29:16,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 01:29:16,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 01:29:16,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 01:29:16,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 01:29:16,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 01:29:16,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 01:29:16,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 01:29:16,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 01:29:16,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 01:29:16,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-07-22 01:29:16,839 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 01:29:16,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 01:29:16,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 01:29:16,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 01:29:16,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 01:29:16,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 01:29:16,841 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 01:29:16,842 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 01:29:16,842 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 01:29:16,842 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 01:29:16,843 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 01:29:16,843 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 01:29:16,847 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 01:29:16,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 01:29:16,847 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 01:29:16,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 01:29:16,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 01:29:16,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 01:29:16,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 01:29:16,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 01:29:16,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 01:29:16,848 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 01:29:16,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 01:29:16,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 01:29:16,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 01:29:16,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 01:29:16,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 01:29:16,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 01:29:16,855 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 01:29:16,856 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14cfbc3a2ba2bfe3a03d4d1ebff24b0baf1851f06dbbd2468b59e09322e4ce16 [2022-07-22 01:29:17,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 01:29:17,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 01:29:17,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 01:29:17,151 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 01:29:17,152 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 01:29:17,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2022-07-22 01:29:17,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df6ef489c/4318ddbcf8c5453abfff9eb4cc36d1c1/FLAG13a3d7609 [2022-07-22 01:29:17,561 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 01:29:17,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2022-07-22 01:29:17,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df6ef489c/4318ddbcf8c5453abfff9eb4cc36d1c1/FLAG13a3d7609 [2022-07-22 01:29:17,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df6ef489c/4318ddbcf8c5453abfff9eb4cc36d1c1 [2022-07-22 01:29:17,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 01:29:17,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 01:29:17,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 01:29:17,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 01:29:17,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 01:29:17,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22547bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17, skipping insertion in model container [2022-07-22 01:29:17,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 01:29:17,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 01:29:17,703 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/termination-numeric/Fibonacci01-2.c[761,774] [2022-07-22 01:29:17,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 01:29:17,713 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 01:29:17,722 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/termination-numeric/Fibonacci01-2.c[761,774] [2022-07-22 01:29:17,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 01:29:17,732 INFO L208 MainTranslator]: Completed translation [2022-07-22 01:29:17,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17 WrapperNode [2022-07-22 01:29:17,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 01:29:17,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 01:29:17,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 01:29:17,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 01:29:17,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,780 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-07-22 01:29:17,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 01:29:17,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 01:29:17,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 01:29:17,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 01:29:17,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 01:29:17,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 01:29:17,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 01:29:17,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 01:29:17,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (1/1) ... [2022-07-22 01:29:17,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:17,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:17,813 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) [2022-07-22 01:29:17,833 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 [2022-07-22 01:29:17,842 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-07-22 01:29:17,843 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-07-22 01:29:17,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 01:29:17,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 01:29:17,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 01:29:17,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 01:29:17,878 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 01:29:17,879 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 01:29:17,954 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 01:29:17,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 01:29:17,958 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 01:29:17,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:29:17 BoogieIcfgContainer [2022-07-22 01:29:17,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 01:29:17,963 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 01:29:17,963 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 01:29:17,965 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 01:29:17,965 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:29:17,965 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 01:29:17" (1/3) ... [2022-07-22 01:29:17,966 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@268f56c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 01:29:17, skipping insertion in model container [2022-07-22 01:29:17,966 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:29:17,966 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 01:29:17" (2/3) ... [2022-07-22 01:29:17,966 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@268f56c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 01:29:17, skipping insertion in model container [2022-07-22 01:29:17,967 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 01:29:17,967 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:29:17" (3/3) ... [2022-07-22 01:29:17,968 INFO L354 chiAutomizerObserver]: Analyzing ICFG Fibonacci01-2.c [2022-07-22 01:29:18,000 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 01:29:18,000 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-22 01:29:18,001 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 01:29:18,001 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 01:29:18,001 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 01:29:18,001 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-22 01:29:18,001 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 01:29:18,001 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 01:29:18,003 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-07-22 01:29:18,015 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:29:18,015 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:29:18,015 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:29:18,019 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-07-22 01:29:18,019 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 01:29:18,019 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-22 01:29:18,020 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-07-22 01:29:18,021 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:29:18,022 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:29:18,022 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:29:18,022 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-07-22 01:29:18,022 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 01:29:18,032 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(16, 2);call #Ultimate.allocInit(12, 3); 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 9#L29true assume !(main_~x~0#1 < 1); 11#L31true call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 4#fibonacciENTRYtrue [2022-07-22 01:29:18,032 INFO L754 eck$LassoCheckResult]: Loop: 4#fibonacciENTRYtrue ~n := #in~n; 5#L17true assume !(~n < 1); 17#L19true assume !(1 == ~n); 15#L22true call #t~ret4 := fibonacci(~n - 1);< 4#fibonacciENTRYtrue [2022-07-22 01:29:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1325876, now seen corresponding path program 1 times [2022-07-22 01:29:18,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:18,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689316686] [2022-07-22 01:29:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:18,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:18,141 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:29:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:18,171 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:29:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 1 times [2022-07-22 01:29:18,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:18,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898780523] [2022-07-22 01:29:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:18,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:18,187 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:29:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:18,193 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:29:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 408654161, now seen corresponding path program 1 times [2022-07-22 01:29:18,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:18,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417531170] [2022-07-22 01:29:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:18,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:18,217 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:29:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:18,233 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:29:18,334 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:29:18,335 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:29:18,335 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:29:18,335 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:29:18,336 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:29:18,336 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,336 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:29:18,336 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:29:18,336 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration1_Loop [2022-07-22 01:29:18,337 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:29:18,337 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:29:18,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,353 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,359 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,426 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:29:18,427 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:29:18,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:18,452 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) [2022-07-22 01:29:18,454 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 [2022-07-22 01:29:18,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:29:18,456 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:18,480 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:29:18,480 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:29:18,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:18,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:18,498 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) [2022-07-22 01:29:18,506 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:29:18,506 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:18,514 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 [2022-07-22 01:29:18,531 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:29:18,531 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:29:18,547 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 [2022-07-22 01:29:18,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:18,549 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) [2022-07-22 01:29:18,550 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 [2022-07-22 01:29:18,551 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:29:18,551 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:18,579 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:29:18,580 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:29:18,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:18,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:18,597 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) [2022-07-22 01:29:18,598 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 [2022-07-22 01:29:18,599 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:29:18,600 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:18,638 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 [2022-07-22 01:29:18,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:18,656 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) [2022-07-22 01:29:18,672 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 [2022-07-22 01:29:18,673 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:29:18,673 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:18,743 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:29:18,759 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 [2022-07-22 01:29:18,759 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:29:18,759 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:29:18,759 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:29:18,759 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:29:18,760 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:29:18,760 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,760 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:29:18,760 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:29:18,760 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration1_Loop [2022-07-22 01:29:18,760 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:29:18,760 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:29:18,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:18,811 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:29:18,814 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:29:18,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:18,817 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) [2022-07-22 01:29:18,825 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 [2022-07-22 01:29:18,826 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 [2022-07-22 01:29:18,832 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:18,832 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:18,832 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:18,833 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:18,833 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:18,834 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:18,834 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:18,850 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:29:18,866 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 [2022-07-22 01:29:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:18,881 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) [2022-07-22 01:29:18,882 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 [2022-07-22 01:29:18,886 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 [2022-07-22 01:29:18,892 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:18,892 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:18,892 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:18,892 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:18,892 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:18,895 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:18,895 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:18,912 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:29:18,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2022-07-22 01:29:18,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:18,933 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) [2022-07-22 01:29:18,934 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 [2022-07-22 01:29:18,935 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 [2022-07-22 01:29:18,941 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:18,942 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:18,942 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:18,942 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:18,942 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:18,942 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:18,942 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:18,955 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:29:18,979 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 [2022-07-22 01:29:18,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:18,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:18,980 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) [2022-07-22 01:29:18,981 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 [2022-07-22 01:29:18,982 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 [2022-07-22 01:29:18,988 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:18,988 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:18,989 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:18,989 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:18,989 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:18,990 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:18,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:19,015 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:29:19,018 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 01:29:19,019 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 01:29:19,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:19,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:19,024 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) [2022-07-22 01:29:19,025 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 [2022-07-22 01:29:19,026 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:29:19,026 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:29:19,027 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:29:19,027 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2022-07-22 01:29:19,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:19,045 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:29:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 01:29:19,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 01:29:19,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:29:19,133 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 [2022-07-22 01:29:19,134 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-07-22 01:29:19,193 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 51 states and 63 transitions. Complement of second has 12 states. [2022-07-22 01:29:19,196 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 [2022-07-22 01:29:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-07-22 01:29:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2022-07-22 01:29:19,201 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2022-07-22 01:29:19,202 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:19,202 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2022-07-22 01:29:19,202 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:19,202 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2022-07-22 01:29:19,203 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:19,203 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 63 transitions. [2022-07-22 01:29:19,206 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:29:19,210 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 26 states and 35 transitions. [2022-07-22 01:29:19,210 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2022-07-22 01:29:19,211 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2022-07-22 01:29:19,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2022-07-22 01:29:19,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:29:19,211 INFO L369 hiAutomatonCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-22 01:29:19,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2022-07-22 01:29:19,253 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 [2022-07-22 01:29:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-07-22 01:29:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-07-22 01:29:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-07-22 01:29:19,256 INFO L392 hiAutomatonCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-07-22 01:29:19,256 INFO L374 stractBuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-07-22 01:29:19,256 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-22 01:29:19,256 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 27 transitions. [2022-07-22 01:29:19,257 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:29:19,257 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:29:19,257 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:29:19,258 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 01:29:19,258 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 01:29:19,258 INFO L752 eck$LassoCheckResult]: Stem: 140#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(16, 2);call #Ultimate.allocInit(12, 3); 141#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 143#L29 assume !(main_~x~0#1 < 1); 131#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 133#fibonacciENTRY ~n := #in~n; 134#L17 assume !(~n < 1); 139#L19 assume !(1 == ~n); 129#L22 call #t~ret4 := fibonacci(~n - 1);< 135#fibonacciENTRY ~n := #in~n; 136#L17 assume ~n < 1;#res := 0; 137#fibonacciFINAL assume true; 142#fibonacciEXIT >#34#return; 128#L22-1 [2022-07-22 01:29:19,258 INFO L754 eck$LassoCheckResult]: Loop: 128#L22-1 call #t~ret5 := fibonacci(~n - 2);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume !(~n < 1); 147#L19 assume !(1 == ~n); 130#L22 call #t~ret4 := fibonacci(~n - 1);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume ~n < 1;#res := 0; 145#fibonacciFINAL assume true; 146#fibonacciEXIT >#34#return; 128#L22-1 [2022-07-22 01:29:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1923124650, now seen corresponding path program 1 times [2022-07-22 01:29:19,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:19,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344177508] [2022-07-22 01:29:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:19,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 01:29:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 01:29:19,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 01:29:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344177508] [2022-07-22 01:29:19,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344177508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 01:29:19,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 01:29:19,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 01:29:19,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852456467] [2022-07-22 01:29:19,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 01:29:19,322 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 01:29:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash 481649848, now seen corresponding path program 1 times [2022-07-22 01:29:19,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:19,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615567673] [2022-07-22 01:29:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 01:29:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 01:29:19,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 01:29:19,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615567673] [2022-07-22 01:29:19,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615567673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 01:29:19,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 01:29:19,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 01:29:19,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934016545] [2022-07-22 01:29:19,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 01:29:19,380 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-22 01:29:19,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 01:29:19,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 01:29:19,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 01:29:19,385 INFO L87 Difference]: Start difference. First operand 21 states and 27 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) [2022-07-22 01:29:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 01:29:19,433 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-07-22 01:29:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 01:29:19,434 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 33 transitions. [2022-07-22 01:29:19,435 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:29:19,436 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 25 states and 31 transitions. [2022-07-22 01:29:19,436 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2022-07-22 01:29:19,436 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2022-07-22 01:29:19,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 31 transitions. [2022-07-22 01:29:19,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:29:19,437 INFO L369 hiAutomatonCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-22 01:29:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 31 transitions. [2022-07-22 01:29:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-22 01:29:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-07-22 01:29:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-22 01:29:19,439 INFO L392 hiAutomatonCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-22 01:29:19,439 INFO L374 stractBuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-22 01:29:19,439 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-22 01:29:19,440 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 31 transitions. [2022-07-22 01:29:19,440 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:29:19,441 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:29:19,441 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:29:19,441 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 01:29:19,441 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-22 01:29:19,442 INFO L752 eck$LassoCheckResult]: Stem: 215#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(16, 2);call #Ultimate.allocInit(12, 3); 216#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 219#L29 assume !(main_~x~0#1 < 1); 204#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 221#fibonacciENTRY ~n := #in~n; 210#L17 assume !(~n < 1); 214#L19 assume !(1 == ~n); 205#L22 call #t~ret4 := fibonacci(~n - 1);< 209#fibonacciENTRY ~n := #in~n; 211#L17 assume !(~n < 1); 227#L19 assume 1 == ~n;#res := 1; 226#fibonacciFINAL assume true; 225#fibonacciEXIT >#34#return; 203#L22-1 [2022-07-22 01:29:19,442 INFO L754 eck$LassoCheckResult]: Loop: 203#L22-1 call #t~ret5 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret4 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret4 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume 1 == ~n;#res := 1; 222#fibonacciFINAL assume true; 223#fibonacciEXIT >#34#return; 203#L22-1 call #t~ret5 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume ~n < 1;#res := 0; 212#fibonacciFINAL assume true; 217#fibonacciEXIT >#36#return; 218#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 220#fibonacciFINAL assume true; 224#fibonacciEXIT >#34#return; 203#L22-1 [2022-07-22 01:29:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash -512653656, now seen corresponding path program 1 times [2022-07-22 01:29:19,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:19,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463097007] [2022-07-22 01:29:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:19,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:19,449 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:29:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:19,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:29:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 1 times [2022-07-22 01:29:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:19,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027715226] [2022-07-22 01:29:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:19,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:19,462 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:29:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:19,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:29:19,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:19,469 INFO L85 PathProgramCache]: Analyzing trace with hash 911295463, now seen corresponding path program 1 times [2022-07-22 01:29:19,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:19,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382001069] [2022-07-22 01:29:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:19,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 01:29:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-22 01:29:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 01:29:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 01:29:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 01:29:19,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 01:29:19,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382001069] [2022-07-22 01:29:19,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382001069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 01:29:19,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151645299] [2022-07-22 01:29:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:19,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 01:29:19,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:19,539 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) [2022-07-22 01:29:19,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 01:29:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:19,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 01:29:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 01:29:19,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 01:29:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 01:29:19,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151645299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 01:29:19,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 01:29:19,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-07-22 01:29:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471727578] [2022-07-22 01:29:19,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 01:29:19,875 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:29:19,875 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:29:19,875 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:29:19,875 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:29:19,875 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:29:19,875 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:19,875 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:29:19,876 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:29:19,876 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration3_Loop [2022-07-22 01:29:19,876 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:29:19,876 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:29:19,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:19,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:19,883 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:19,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:19,915 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:29:19,915 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:29:19,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:19,927 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) [2022-07-22 01:29:19,943 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 [2022-07-22 01:29:19,944 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:29:19,944 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:19,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:19,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:19,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:19,975 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) [2022-07-22 01:29:19,976 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 [2022-07-22 01:29:19,977 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:29:19,977 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:20,714 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:29:20,720 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 [2022-07-22 01:29:20,720 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:29:20,720 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:29:20,720 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:29:20,720 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:29:20,720 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:29:20,720 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:20,720 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:29:20,720 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:29:20,720 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration3_Loop [2022-07-22 01:29:20,721 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:29:20,721 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:29:20,721 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:20,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:20,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:20,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:20,759 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:29:20,760 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:29:20,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:20,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:20,761 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) [2022-07-22 01:29:20,781 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 [2022-07-22 01:29:20,782 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 [2022-07-22 01:29:20,789 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:20,790 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:20,790 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:20,790 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:20,790 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:20,791 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:20,791 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:20,799 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:29:20,823 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 [2022-07-22 01:29:20,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:20,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:20,825 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) [2022-07-22 01:29:20,826 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 [2022-07-22 01:29:20,827 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 [2022-07-22 01:29:20,833 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:20,833 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:20,833 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:20,833 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:20,833 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:20,833 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:20,833 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:20,842 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:29:20,862 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 [2022-07-22 01:29:20,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:20,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:20,868 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) [2022-07-22 01:29:20,868 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 [2022-07-22 01:29:20,869 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 [2022-07-22 01:29:20,875 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:20,875 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:20,875 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:20,875 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:20,875 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:20,876 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:20,876 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:20,880 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:29:20,900 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 [2022-07-22 01:29:20,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:20,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:20,903 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) [2022-07-22 01:29:20,904 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 [2022-07-22 01:29:20,905 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 [2022-07-22 01:29:20,912 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:20,912 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:20,912 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:20,913 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:20,913 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:20,914 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:20,914 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:20,928 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:29:20,931 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 01:29:20,931 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 01:29:20,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:20,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:20,933 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) [2022-07-22 01:29:20,934 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 [2022-07-22 01:29:20,935 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:29:20,935 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:29:20,935 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:29:20,936 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-22 01:29:20,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2022-07-22 01:29:20,959 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:29:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:20,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 01:29:20,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:21,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 01:29:21,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 01:29:21,153 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-22 01:29:21,154 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 01:29:21,260 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 [2022-07-22 01:29:21,374 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 160 states and 216 transitions. Complement of second has 48 states. [2022-07-22 01:29:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2022-07-22 01:29:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 01:29:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 42 transitions. [2022-07-22 01:29:21,377 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 22 letters. [2022-07-22 01:29:21,377 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:21,377 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 35 letters. Loop has 22 letters. [2022-07-22 01:29:21,378 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:21,378 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 44 letters. [2022-07-22 01:29:21,379 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:21,379 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 160 states and 216 transitions. [2022-07-22 01:29:21,383 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2022-07-22 01:29:21,386 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 160 states to 129 states and 181 transitions. [2022-07-22 01:29:21,386 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2022-07-22 01:29:21,387 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 80 [2022-07-22 01:29:21,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 181 transitions. [2022-07-22 01:29:21,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:29:21,387 INFO L369 hiAutomatonCegarLoop]: Abstraction has 129 states and 181 transitions. [2022-07-22 01:29:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states and 181 transitions. [2022-07-22 01:29:21,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2022-07-22 01:29:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2022-07-22 01:29:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2022-07-22 01:29:21,397 INFO L392 hiAutomatonCegarLoop]: Abstraction has 107 states and 141 transitions. [2022-07-22 01:29:21,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 01:29:21,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 01:29:21,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 01:29:21,397 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 01:29:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 01:29:21,444 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-22 01:29:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 01:29:21,445 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 58 transitions. [2022-07-22 01:29:21,446 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:29:21,446 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 42 states and 54 transitions. [2022-07-22 01:29:21,447 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2022-07-22 01:29:21,447 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2022-07-22 01:29:21,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 54 transitions. [2022-07-22 01:29:21,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:29:21,447 INFO L369 hiAutomatonCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-07-22 01:29:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 54 transitions. [2022-07-22 01:29:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-07-22 01:29:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 01:29:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-07-22 01:29:21,450 INFO L392 hiAutomatonCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-07-22 01:29:21,450 INFO L374 stractBuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-07-22 01:29:21,450 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-22 01:29:21,450 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 39 states and 48 transitions. [2022-07-22 01:29:21,451 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 01:29:21,451 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:29:21,451 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:29:21,452 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 01:29:21,452 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-22 01:29:21,453 INFO L752 eck$LassoCheckResult]: Stem: 991#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(16, 2);call #Ultimate.allocInit(12, 3); 992#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 995#L29 assume !(main_~x~0#1 < 1); 981#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 983#fibonacciENTRY ~n := #in~n; 984#L17 assume !(~n < 1); 990#L19 assume !(1 == ~n); 980#L22 call #t~ret4 := fibonacci(~n - 1);< 982#fibonacciENTRY ~n := #in~n; 986#L17 assume !(~n < 1); 1013#L19 assume !(1 == ~n); 985#L22 call #t~ret4 := fibonacci(~n - 1);< 982#fibonacciENTRY ~n := #in~n; 987#L17 assume !(~n < 1); 997#L19 assume 1 == ~n;#res := 1; 998#fibonacciFINAL assume true; 1012#fibonacciEXIT >#34#return; 1007#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1008#fibonacciENTRY ~n := #in~n; 1011#L17 assume ~n < 1;#res := 0; 1009#fibonacciFINAL assume true; 1006#fibonacciEXIT >#36#return; 1005#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1004#fibonacciFINAL assume true; 1003#fibonacciEXIT >#34#return; 977#L22-1 [2022-07-22 01:29:21,453 INFO L754 eck$LassoCheckResult]: Loop: 977#L22-1 call #t~ret5 := fibonacci(~n - 2);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume 1 == ~n;#res := 1; 1001#fibonacciFINAL assume true; 1010#fibonacciEXIT >#34#return; 975#L22-1 call #t~ret5 := fibonacci(~n - 2);< 978#fibonacciENTRY ~n := #in~n; 988#L17 assume ~n < 1;#res := 0; 989#fibonacciFINAL assume true; 993#fibonacciEXIT >#36#return; 994#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 996#fibonacciFINAL assume true; 999#fibonacciEXIT >#34#return; 977#L22-1 [2022-07-22 01:29:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 506180814, now seen corresponding path program 2 times [2022-07-22 01:29:21,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:21,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385051399] [2022-07-22 01:29:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:21,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:21,461 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:29:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:21,467 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:29:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:21,467 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 2 times [2022-07-22 01:29:21,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:21,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547790838] [2022-07-22 01:29:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:21,471 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:29:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:21,476 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:29:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1200508531, now seen corresponding path program 3 times [2022-07-22 01:29:21,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:21,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843158429] [2022-07-22 01:29:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:21,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:21,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 01:29:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:21,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 01:29:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:21,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 01:29:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:21,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 01:29:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:21,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 01:29:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:21,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 01:29:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 01:29:21,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 01:29:21,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843158429] [2022-07-22 01:29:21,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843158429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 01:29:21,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34850710] [2022-07-22 01:29:21,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 01:29:21,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 01:29:21,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:21,545 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 01:29:21,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 01:29:21,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 01:29:21,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 01:29:21,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 01:29:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-22 01:29:21,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 01:29:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 01:29:21,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34850710] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 01:29:21,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 01:29:21,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 21 [2022-07-22 01:29:21,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988246034] [2022-07-22 01:29:21,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 01:29:22,108 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:29:22,108 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:29:22,108 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:29:22,108 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:29:22,108 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:29:22,108 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:22,109 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:29:22,109 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:29:22,109 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration4_Loop [2022-07-22 01:29:22,109 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:29:22,109 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:29:22,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:22,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:22,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:22,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:22,165 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:29:22,165 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:29:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:22,166 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) [2022-07-22 01:29:22,167 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 [2022-07-22 01:29:22,169 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:29:22,169 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:22,201 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 [2022-07-22 01:29:22,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:22,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:22,202 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) [2022-07-22 01:29:22,203 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 [2022-07-22 01:29:22,204 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:29:22,204 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:22,785 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:29:22,791 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 [2022-07-22 01:29:22,792 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:29:22,792 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:29:22,792 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:29:22,792 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:29:22,792 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:29:22,792 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:22,792 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:29:22,792 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:29:22,792 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration4_Loop [2022-07-22 01:29:22,792 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:29:22,792 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:29:22,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:22,801 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:22,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:22,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:22,848 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:29:22,848 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:29:22,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:22,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:22,849 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:29:22,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-07-22 01:29:22,851 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 [2022-07-22 01:29:22,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:22,857 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:22,857 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:22,857 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:22,857 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:22,859 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:22,859 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:22,885 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:29:22,888 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 01:29:22,888 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 01:29:22,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:22,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:22,890 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) [2022-07-22 01:29:22,892 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:29:22,892 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:29:22,892 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:29:22,892 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-22 01:29:22,906 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 [2022-07-22 01:29:22,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:22,923 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:29:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:22,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 01:29:22,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:23,134 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 [2022-07-22 01:29:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 01:29:23,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 01:29:23,225 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-22 01:29:23,225 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 01:29:23,288 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2022-07-22 01:29:23,289 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 [2022-07-22 01:29:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 01:29:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2022-07-22 01:29:23,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2022-07-22 01:29:23,290 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:23,290 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 01:29:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 01:29:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:23,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 01:29:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 01:29:23,545 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-22 01:29:23,545 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 01:29:23,602 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2022-07-22 01:29:23,603 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 [2022-07-22 01:29:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 01:29:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2022-07-22 01:29:23,604 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2022-07-22 01:29:23,604 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:23,604 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 01:29:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:23,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 01:29:23,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:23,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 01:29:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 01:29:23,859 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 7 loop predicates [2022-07-22 01:29:23,859 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 01:29:24,034 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 345 states and 444 transitions. Complement of second has 125 states. [2022-07-22 01:29:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2022-07-22 01:29:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 01:29:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 47 transitions. [2022-07-22 01:29:24,035 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 22 letters. [2022-07-22 01:29:24,036 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:24,036 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 47 letters. Loop has 22 letters. [2022-07-22 01:29:24,037 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:24,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 44 letters. [2022-07-22 01:29:24,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:24,038 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 444 transitions. [2022-07-22 01:29:24,042 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-22 01:29:24,046 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 220 states and 297 transitions. [2022-07-22 01:29:24,046 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2022-07-22 01:29:24,046 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 116 [2022-07-22 01:29:24,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 220 states and 297 transitions. [2022-07-22 01:29:24,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:29:24,047 INFO L369 hiAutomatonCegarLoop]: Abstraction has 220 states and 297 transitions. [2022-07-22 01:29:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states and 297 transitions. [2022-07-22 01:29:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 172. [2022-07-22 01:29:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 112 states have internal predecessors, (122), 38 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (59), 36 states have call predecessors, (59), 36 states have call successors, (59) [2022-07-22 01:29:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 223 transitions. [2022-07-22 01:29:24,060 INFO L392 hiAutomatonCegarLoop]: Abstraction has 172 states and 223 transitions. [2022-07-22 01:29:24,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 01:29:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 01:29:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-07-22 01:29:24,061 INFO L87 Difference]: Start difference. First operand 172 states and 223 transitions. Second operand has 21 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 13 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-22 01:29:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 01:29:24,259 INFO L93 Difference]: Finished difference Result 349 states and 503 transitions. [2022-07-22 01:29:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 01:29:24,261 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 503 transitions. [2022-07-22 01:29:24,265 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-22 01:29:24,270 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 339 states and 490 transitions. [2022-07-22 01:29:24,270 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2022-07-22 01:29:24,271 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 193 [2022-07-22 01:29:24,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 339 states and 490 transitions. [2022-07-22 01:29:24,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:29:24,271 INFO L369 hiAutomatonCegarLoop]: Abstraction has 339 states and 490 transitions. [2022-07-22 01:29:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states and 490 transitions. [2022-07-22 01:29:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 274. [2022-07-22 01:29:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 171 states have (on average 1.128654970760234) internal successors, (193), 174 states have internal predecessors, (193), 60 states have call successors, (72), 36 states have call predecessors, (72), 43 states have return successors, (136), 63 states have call predecessors, (136), 58 states have call successors, (136) [2022-07-22 01:29:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 401 transitions. [2022-07-22 01:29:24,286 INFO L392 hiAutomatonCegarLoop]: Abstraction has 274 states and 401 transitions. [2022-07-22 01:29:24,286 INFO L374 stractBuchiCegarLoop]: Abstraction has 274 states and 401 transitions. [2022-07-22 01:29:24,287 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-22 01:29:24,287 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 274 states and 401 transitions. [2022-07-22 01:29:24,288 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-22 01:29:24,288 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 01:29:24,288 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 01:29:24,290 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [12, 10, 9, 7, 7, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2022-07-22 01:29:24,290 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 01:29:24,290 INFO L752 eck$LassoCheckResult]: Stem: 3005#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(16, 2);call #Ultimate.allocInit(12, 3); 3006#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 3010#L29 assume !(main_~x~0#1 < 1); 3011#L31 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 3015#fibonacciENTRY ~n := #in~n; 3048#L17 assume !(~n < 1); 3046#L19 assume !(1 == ~n); 3038#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3049#L17 assume !(~n < 1); 3145#L19 assume 1 == ~n;#res := 1; 3144#fibonacciFINAL assume true; 3142#fibonacciEXIT >#34#return; 3135#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3137#fibonacciENTRY ~n := #in~n; 3143#L17 assume ~n < 1;#res := 0; 3138#fibonacciFINAL assume true; 3134#fibonacciEXIT >#36#return; 3133#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3132#fibonacciFINAL assume true; 3129#fibonacciEXIT >#34#return; 3077#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3079#fibonacciENTRY ~n := #in~n; 3127#L17 assume !(~n < 1); 3123#L19 assume 1 == ~n;#res := 1; 3026#fibonacciFINAL assume true; 3076#fibonacciEXIT >#36#return; 3072#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3064#fibonacciFINAL assume true; 3054#fibonacciEXIT >#34#return; 3053#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3056#fibonacciENTRY ~n := #in~n; 3128#L17 assume !(~n < 1); 3124#L19 assume !(1 == ~n); 3125#L22 call #t~ret4 := fibonacci(~n - 1);< 3238#fibonacciENTRY ~n := #in~n; 3185#L17 assume !(~n < 1); 3186#L19 assume 1 == ~n;#res := 1; 3239#fibonacciFINAL assume true; 3236#fibonacciEXIT >#34#return; 3068#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3071#fibonacciENTRY ~n := #in~n; 3130#L17 assume ~n < 1;#res := 0; 3081#fibonacciFINAL assume true; 3067#fibonacciEXIT >#36#return; 3070#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3063#fibonacciFINAL assume true; 3052#fibonacciEXIT >#36#return; 3040#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3043#fibonacciFINAL assume true; 3037#fibonacciEXIT >#34#return; 3025#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3031#fibonacciENTRY ~n := #in~n; 3032#L17 assume !(~n < 1); 3023#L19 assume !(1 == ~n); 2996#L22 call #t~ret4 := fibonacci(~n - 1);< 3235#fibonacciENTRY ~n := #in~n; 2994#L17 assume !(~n < 1); 2997#L19 assume !(1 == ~n); 3206#L22 call #t~ret4 := fibonacci(~n - 1);< 3207#fibonacciENTRY [2022-07-22 01:29:24,290 INFO L754 eck$LassoCheckResult]: Loop: 3207#fibonacciENTRY ~n := #in~n; 3218#L17 assume !(~n < 1); 3215#L19 assume !(1 == ~n); 3205#L22 call #t~ret4 := fibonacci(~n - 1);< 3207#fibonacciENTRY [2022-07-22 01:29:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:24,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1489009265, now seen corresponding path program 4 times [2022-07-22 01:29:24,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:24,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278199987] [2022-07-22 01:29:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:24,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:24,302 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:29:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:24,325 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:29:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 2 times [2022-07-22 01:29:24,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:24,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694378285] [2022-07-22 01:29:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:24,328 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 01:29:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 01:29:24,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 01:29:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:24,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1238644268, now seen corresponding path program 5 times [2022-07-22 01:29:24,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 01:29:24,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071906816] [2022-07-22 01:29:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 01:29:24,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 01:29:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 01:29:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 01:29:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 01:29:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 01:29:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 01:29:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 01:29:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 01:29:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 01:29:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 01:29:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 110 proven. 115 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 01:29:24,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 01:29:24,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071906816] [2022-07-22 01:29:24,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071906816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 01:29:24,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593554000] [2022-07-22 01:29:24,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 01:29:24,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 01:29:24,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:24,488 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 01:29:24,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 01:29:24,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-22 01:29:24,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 01:29:24,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 01:29:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 115 proven. 109 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-22 01:29:24,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 01:29:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 115 proven. 121 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-22 01:29:24,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593554000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 01:29:24,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 01:29:24,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 16] total 21 [2022-07-22 01:29:24,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783181193] [2022-07-22 01:29:24,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 01:29:24,982 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:29:24,982 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:29:24,982 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:29:24,982 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:29:24,982 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 01:29:24,982 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:24,982 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:29:24,982 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:29:24,983 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration5_Loop [2022-07-22 01:29:24,983 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:29:24,983 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:29:24,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:24,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:24,987 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:24,991 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:24,992 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:25,018 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:29:25,018 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 01:29:25,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:25,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:25,019 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) [2022-07-22 01:29:25,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:29:25,022 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:25,031 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 [2022-07-22 01:29:25,040 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:29:25,040 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:29:25,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:25,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:25,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:25,065 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) [2022-07-22 01:29:25,066 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 [2022-07-22 01:29:25,067 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:29:25,067 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:25,088 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 01:29:25,088 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 01:29:25,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:25,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:25,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:25,112 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) [2022-07-22 01:29:25,113 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 [2022-07-22 01:29:25,114 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 01:29:25,114 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:25,151 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 [2022-07-22 01:29:25,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:25,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:25,160 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) [2022-07-22 01:29:25,161 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 [2022-07-22 01:29:25,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 01:29:25,163 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 01:29:25,199 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 01:29:25,204 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 [2022-07-22 01:29:25,204 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 01:29:25,205 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 01:29:25,205 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 01:29:25,205 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 01:29:25,205 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 01:29:25,205 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:25,205 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 01:29:25,205 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 01:29:25,205 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci01-2.c_Iteration5_Loop [2022-07-22 01:29:25,205 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 01:29:25,205 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 01:29:25,205 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:25,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:25,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:25,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:25,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 01:29:25,238 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 01:29:25,238 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 01:29:25,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:25,240 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 01:29:25,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2022-07-22 01:29:25,242 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 [2022-07-22 01:29:25,248 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:25,249 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:25,249 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:25,249 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:25,249 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:25,249 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:25,249 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:25,259 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:29:25,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:25,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:25,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:25,277 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) [2022-07-22 01:29:25,278 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 [2022-07-22 01:29:25,279 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 [2022-07-22 01:29:25,285 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:25,285 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:25,285 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:25,285 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:25,285 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:25,286 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:25,286 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:25,301 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 01:29:25,343 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 [2022-07-22 01:29:25,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:25,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:25,345 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) [2022-07-22 01:29:25,346 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 [2022-07-22 01:29:25,348 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 [2022-07-22 01:29:25,353 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 01:29:25,353 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 01:29:25,353 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 01:29:25,353 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 01:29:25,354 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 01:29:25,355 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 01:29:25,355 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 01:29:25,370 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 01:29:25,372 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 01:29:25,372 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 01:29:25,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 01:29:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 01:29:25,374 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) [2022-07-22 01:29:25,375 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 [2022-07-22 01:29:25,376 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 01:29:25,376 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 01:29:25,376 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 01:29:25,376 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2022-07-22 01:29:25,397 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 [2022-07-22 01:29:25,398 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 01:29:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:25,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 01:29:25,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:25,543 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 [2022-07-22 01:29:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 01:29:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:29:25,894 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 [2022-07-22 01:29:25,894 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:29:25,937 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 296 states and 427 transitions. Complement of second has 13 states. [2022-07-22 01:29:25,937 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 [2022-07-22 01:29:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:29:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2022-07-22 01:29:25,939 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2022-07-22 01:29:25,939 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:25,939 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 01:29:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:25,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 01:29:25,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 01:29:26,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:29:26,360 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 [2022-07-22 01:29:26,361 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:29:26,397 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 296 states and 427 transitions. Complement of second has 13 states. [2022-07-22 01:29:26,397 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 [2022-07-22 01:29:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:29:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2022-07-22 01:29:26,398 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2022-07-22 01:29:26,398 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:26,398 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 01:29:26,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 01:29:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 01:29:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 01:29:26,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 01:29:26,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 01:29:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 01:29:26,806 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 [2022-07-22 01:29:26,806 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:29:26,843 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 349 states and 484 transitions. Complement of second has 14 states. [2022-07-22 01:29:26,843 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 [2022-07-22 01:29:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 01:29:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2022-07-22 01:29:26,844 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 4 letters. [2022-07-22 01:29:26,844 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:26,844 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 76 letters. Loop has 4 letters. [2022-07-22 01:29:26,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:26,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 8 letters. [2022-07-22 01:29:26,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 01:29:26,845 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 484 transitions. [2022-07-22 01:29:26,848 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-22 01:29:26,851 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 288 states and 417 transitions. [2022-07-22 01:29:26,851 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 138 [2022-07-22 01:29:26,851 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 143 [2022-07-22 01:29:26,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 288 states and 417 transitions. [2022-07-22 01:29:26,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 01:29:26,852 INFO L369 hiAutomatonCegarLoop]: Abstraction has 288 states and 417 transitions. [2022-07-22 01:29:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states and 417 transitions. [2022-07-22 01:29:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 280. [2022-07-22 01:29:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 176 states have (on average 1.125) internal successors, (198), 179 states have internal predecessors, (198), 61 states have call successors, (73), 37 states have call predecessors, (73), 43 states have return successors, (138), 63 states have call predecessors, (138), 59 states have call successors, (138) [2022-07-22 01:29:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 409 transitions. [2022-07-22 01:29:26,861 INFO L392 hiAutomatonCegarLoop]: Abstraction has 280 states and 409 transitions. [2022-07-22 01:29:26,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 01:29:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 01:29:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2022-07-22 01:29:26,862 INFO L87 Difference]: Start difference. First operand 280 states and 409 transitions. Second operand has 21 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 15 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-22 01:29:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 01:29:27,030 INFO L93 Difference]: Finished difference Result 408 states and 601 transitions. [2022-07-22 01:29:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 01:29:27,030 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 408 states and 601 transitions. [2022-07-22 01:29:27,034 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 01:29:27,035 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 408 states to 0 states and 0 transitions. [2022-07-22 01:29:27,035 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-22 01:29:27,035 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-22 01:29:27,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-22 01:29:27,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 01:29:27,035 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 01:29:27,035 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 01:29:27,035 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 01:29:27,035 INFO L287 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-07-22 01:29:27,035 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-22 01:29:27,036 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 01:29:27,036 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-22 01:29:27,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.07 01:29:27 BoogieIcfgContainer [2022-07-22 01:29:27,040 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-22 01:29:27,041 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 01:29:27,041 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 01:29:27,041 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 01:29:27,041 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 01:29:17" (3/4) ... [2022-07-22 01:29:27,043 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 01:29:27,043 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 01:29:27,043 INFO L158 Benchmark]: Toolchain (without parser) took 9465.61ms. Allocated memory was 58.7MB in the beginning and 151.0MB in the end (delta: 92.3MB). Free memory was 37.6MB in the beginning and 123.2MB in the end (delta: -85.6MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2022-07-22 01:29:27,044 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:29:27,044 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.55ms. Allocated memory is still 58.7MB. Free memory was 37.5MB in the beginning and 28.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 01:29:27,044 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.31ms. Allocated memory is still 58.7MB. Free memory was 28.2MB in the beginning and 42.1MB in the end (delta: -13.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 01:29:27,044 INFO L158 Benchmark]: Boogie Preprocessor took 8.93ms. Allocated memory is still 58.7MB. Free memory was 42.1MB in the beginning and 41.1MB in the end (delta: 947.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 01:29:27,045 INFO L158 Benchmark]: RCFGBuilder took 171.89ms. Allocated memory is still 58.7MB. Free memory was 41.1MB in the beginning and 32.6MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 01:29:27,045 INFO L158 Benchmark]: BuchiAutomizer took 9077.43ms. Allocated memory was 58.7MB in the beginning and 151.0MB in the end (delta: 92.3MB). Free memory was 32.6MB in the beginning and 124.2MB in the end (delta: -91.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:29:27,045 INFO L158 Benchmark]: Witness Printer took 2.29ms. Allocated memory is still 151.0MB. Free memory was 124.2MB in the beginning and 123.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 01:29:27,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory is still 40.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.55ms. Allocated memory is still 58.7MB. Free memory was 37.5MB in the beginning and 28.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.31ms. Allocated memory is still 58.7MB. Free memory was 28.2MB in the beginning and 42.1MB in the end (delta: -13.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 8.93ms. Allocated memory is still 58.7MB. Free memory was 42.1MB in the beginning and 41.1MB in the end (delta: 947.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 171.89ms. Allocated memory is still 58.7MB. Free memory was 41.1MB in the beginning and 32.6MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 9077.43ms. Allocated memory was 58.7MB in the beginning and 151.0MB in the end (delta: 92.3MB). Free memory was 32.6MB in the beginning and 124.2MB in the end (delta: -91.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.29ms. Allocated memory is still 151.0MB. Free memory was 124.2MB in the beginning and 123.2MB in the end (delta: 1.0MB). 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 8 terminating modules (4 trivial, 2 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 10 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 4 modules have a trivial ranking function, the largest among these consists of 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 9.0s and 6 iterations. TraceHistogramMax:12. Analysis of lassos took 5.2s. Construction of modules took 0.4s. Büchi inclusion checks took 3.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 151 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 471 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 442 mSDsluCounter, 379 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 223 mSDsCounter, 318 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 716 IncrementalHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 318 mSolverCounterUnsat, 156 mSDtfsCounter, 716 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT3 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax100 hnf100 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq179 hnf94 smp69 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 35ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.8s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-22 01:29:27,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:27,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:27,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 01:29:27,685 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