./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 40add90db9f8d501baba3978de407d6383e788a1a5fafc7225d7676b58d18c84 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 10:03:10,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 10:03:10,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 10:03:10,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 10:03:10,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 10:03:10,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 10:03:10,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 10:03:10,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 10:03:10,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 10:03:10,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 10:03:10,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 10:03:10,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 10:03:10,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 10:03:10,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 10:03:10,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 10:03:10,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 10:03:10,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 10:03:10,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 10:03:10,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 10:03:10,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 10:03:10,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 10:03:10,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 10:03:10,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 10:03:10,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 10:03:10,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 10:03:10,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 10:03:10,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 10:03:10,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 10:03:10,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 10:03:10,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 10:03:10,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 10:03:10,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 10:03:10,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 10:03:10,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 10:03:10,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 10:03:10,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 10:03:10,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 10:03:10,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 10:03:10,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 10:03:10,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 10:03:10,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 10:03:10,630 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-16 10:03:10,649 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 10:03:10,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 10:03:10,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 10:03:10,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 10:03:10,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 10:03:10,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 10:03:10,651 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 10:03:10,651 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-16 10:03:10,652 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-16 10:03:10,652 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-16 10:03:10,652 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-16 10:03:10,652 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-16 10:03:10,653 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-16 10:03:10,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 10:03:10,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 10:03:10,653 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 10:03:10,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 10:03:10,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 10:03:10,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 10:03:10,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-16 10:03:10,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-16 10:03:10,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-16 10:03:10,654 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 10:03:10,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 10:03:10,655 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-16 10:03:10,656 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 10:03:10,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-16 10:03:10,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 10:03:10,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 10:03:10,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 10:03:10,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 10:03:10,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 10:03:10,657 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-16 10:03:10,657 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40add90db9f8d501baba3978de407d6383e788a1a5fafc7225d7676b58d18c84 [2021-12-16 10:03:10,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 10:03:10,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 10:03:10,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 10:03:10,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 10:03:10,828 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 10:03:10,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2021-12-16 10:03:10,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668c79e87/d2b361d9743e44e1b9644a8a64acf5d8/FLAG237f5185b [2021-12-16 10:03:11,166 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 10:03:11,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2021-12-16 10:03:11,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668c79e87/d2b361d9743e44e1b9644a8a64acf5d8/FLAG237f5185b [2021-12-16 10:03:11,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/668c79e87/d2b361d9743e44e1b9644a8a64acf5d8 [2021-12-16 10:03:11,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 10:03:11,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 10:03:11,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 10:03:11,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 10:03:11,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 10:03:11,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4905aa4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11, skipping insertion in model container [2021-12-16 10:03:11,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 10:03:11,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 10:03:11,714 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2021-12-16 10:03:11,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 10:03:11,730 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 10:03:11,738 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2021-12-16 10:03:11,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 10:03:11,747 INFO L208 MainTranslator]: Completed translation [2021-12-16 10:03:11,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11 WrapperNode [2021-12-16 10:03:11,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 10:03:11,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 10:03:11,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 10:03:11,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 10:03:11,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,767 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-16 10:03:11,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 10:03:11,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 10:03:11,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 10:03:11,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 10:03:11,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 10:03:11,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 10:03:11,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 10:03:11,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 10:03:11,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (1/1) ... [2021-12-16 10:03:11,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:11,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:11,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:11,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-16 10:03:11,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 10:03:11,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 10:03:11,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 10:03:11,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 10:03:11,841 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-12-16 10:03:11,841 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-12-16 10:03:11,881 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 10:03:11,883 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 10:03:11,978 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 10:03:11,984 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 10:03:11,985 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 10:03:11,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:03:11 BoogieIcfgContainer [2021-12-16 10:03:11,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 10:03:11,987 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-16 10:03:11,987 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-16 10:03:11,989 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-16 10:03:11,990 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 10:03:11,990 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.12 10:03:11" (1/3) ... [2021-12-16 10:03:11,991 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1643b430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 10:03:11, skipping insertion in model container [2021-12-16 10:03:11,991 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 10:03:11,992 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:03:11" (2/3) ... [2021-12-16 10:03:11,992 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1643b430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 10:03:11, skipping insertion in model container [2021-12-16 10:03:11,992 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 10:03:11,992 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:03:11" (3/3) ... [2021-12-16 10:03:11,993 INFO L388 chiAutomizerObserver]: Analyzing ICFG fibo_7-2.c [2021-12-16 10:03:12,052 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-16 10:03:12,052 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-16 10:03:12,052 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-16 10:03:12,052 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-16 10:03:12,052 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-16 10:03:12,052 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-16 10:03:12,053 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-16 10:03:12,053 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-16 10:03:12,080 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-12-16 10:03:12,093 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:03:12,102 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:03:12,102 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:03:12,114 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 10:03:12,115 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 10:03:12,115 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-16 10:03:12,115 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-12-16 10:03:12,117 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:03:12,118 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:03:12,118 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:03:12,118 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 10:03:12,118 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-12-16 10:03:12,123 INFO L791 eck$LassoCheckResult]: Stem: 4#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(11, 2);call #Ultimate.allocInit(12, 3); 13#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 6#L27true call main_#t~ret6#1 := fibo(main_~x~0#1);< 7#fiboENTRYtrue [2021-12-16 10:03:12,123 INFO L793 eck$LassoCheckResult]: Loop: 7#fiboENTRYtrue ~n := #in~n; 8#L8true assume !(~n < 1); 10#L10true assume !(1 == ~n); 15#L13true call #t~ret4 := fibo(~n - 1);< 7#fiboENTRYtrue [2021-12-16 10:03:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:12,132 INFO L85 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-12-16 10:03:12,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:12,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915283356] [2021-12-16 10:03:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:12,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:12,211 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:03:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:12,238 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:03:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-12-16 10:03:12,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:12,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419688294] [2021-12-16 10:03:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:12,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:12,250 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:03:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:12,257 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:03:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:12,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-12-16 10:03:12,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:12,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111402323] [2021-12-16 10:03:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:12,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:12,278 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:03:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:12,299 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:03:12,403 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:03:12,404 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:03:12,404 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:03:12,404 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:03:12,404 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 10:03:12,404 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,405 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:03:12,405 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:03:12,405 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2021-12-16 10:03:12,405 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:03:12,405 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:03:12,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,494 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:03:12,494 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 10:03:12,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-16 10:03:12,499 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:03:12,500 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:12,521 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:03:12,521 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:03:12,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:12,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-16 10:03:12,545 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:03:12,545 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:12,566 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:03:12,566 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:03:12,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:12,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-16 10:03:12,588 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:03:12,589 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:12,599 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:03:12,599 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:03:12,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-12-16 10:03:12,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,625 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:03:12,625 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:12,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-16 10:03:12,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-12-16 10:03:12,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-16 10:03:12,669 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 10:03:12,669 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:12,723 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 10:03:12,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:12,726 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:03:12,726 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:03:12,726 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:03:12,726 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:03:12,726 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 10:03:12,726 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,726 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:03:12,726 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:03:12,726 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2021-12-16 10:03:12,727 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:03:12,727 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:03:12,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:12,772 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:03:12,775 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 10:03:12,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-16 10:03:12,779 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 10:03:12,784 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:03:12,785 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:03:12,785 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:03:12,785 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:03:12,785 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:03:12,786 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:03:12,786 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:03:12,800 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:03:12,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-12-16 10:03:12,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-16 10:03:12,826 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 [2021-12-16 10:03:12,832 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:03:12,832 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:03:12,832 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:03:12,832 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:03:12,832 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:03:12,832 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:03:12,833 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:03:12,841 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:03:12,858 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 [2021-12-16 10:03:12,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-16 10:03:12,875 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 10:03:12,880 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:03:12,880 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:03:12,880 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:03:12,880 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:03:12,880 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:03:12,881 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:03:12,882 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:03:12,883 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:03:12,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:12,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-16 10:03:12,901 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 10:03:12,906 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:03:12,907 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:03:12,907 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:03:12,907 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:03:12,907 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:03:12,908 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:03:12,908 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:03:12,917 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 10:03:12,921 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 10:03:12,921 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 10:03:12,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:12,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:12,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:12,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-16 10:03:12,925 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 10:03:12,925 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 10:03:12,925 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 10:03:12,925 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-12-16 10:03:12,945 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 [2021-12-16 10:03:12,947 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 10:03:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:13,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 10:03:13,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:13,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 10:03:13,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:03:13,078 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 [2021-12-16 10:03:13,079 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 10:03:13,172 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 48 states and 60 transitions. Complement of second has 12 states. [2021-12-16 10:03:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-12-16 10:03:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 10:03:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-12-16 10:03:13,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-12-16 10:03:13,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:13,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-12-16 10:03:13,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:13,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-12-16 10:03:13,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:13,186 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-12-16 10:03:13,190 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:03:13,193 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-12-16 10:03:13,194 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-12-16 10:03:13,194 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-12-16 10:03:13,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-12-16 10:03:13,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:03:13,194 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-12-16 10:03:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-12-16 10:03:13,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-12-16 10:03:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 10:03:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-12-16 10:03:13,226 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-16 10:03:13,226 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-12-16 10:03:13,226 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-16 10:03:13,226 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-12-16 10:03:13,227 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:03:13,227 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:03:13,227 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:03:13,228 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:03:13,228 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:03:13,228 INFO L791 eck$LassoCheckResult]: Stem: 122#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(11, 2);call #Ultimate.allocInit(12, 3); 123#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 128#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret4 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 134#L8 assume ~n < 1;#res := 0; 135#fiboFINAL assume true; 136#fiboEXIT >#33#return; 125#L13-1 [2021-12-16 10:03:13,228 INFO L793 eck$LassoCheckResult]: Loop: 125#L13-1 call #t~ret5 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 141#L8 assume !(~n < 1); 140#L10 assume !(1 == ~n); 124#L13 call #t~ret4 := fibo(~n - 1);< 126#fiboENTRY ~n := #in~n; 141#L8 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 139#fiboEXIT >#33#return; 125#L13-1 [2021-12-16 10:03:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-12-16 10:03:13,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:13,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361334971] [2021-12-16 10:03:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:13,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:13,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 10:03:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 10:03:13,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:03:13,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361334971] [2021-12-16 10:03:13,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361334971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 10:03:13,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 10:03:13,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 10:03:13,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586104106] [2021-12-16 10:03:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 10:03:13,290 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-16 10:03:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:13,291 INFO L85 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-12-16 10:03:13,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:13,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63958229] [2021-12-16 10:03:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:13,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:13,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 10:03:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 10:03:13,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:03:13,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63958229] [2021-12-16 10:03:13,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63958229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 10:03:13,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 10:03:13,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 10:03:13,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927498109] [2021-12-16 10:03:13,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 10:03:13,339 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-16 10:03:13,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 10:03:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 10:03:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 10:03:13,342 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 10:03:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 10:03:13,388 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-12-16 10:03:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 10:03:13,389 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-12-16 10:03:13,390 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:03:13,391 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-12-16 10:03:13,391 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-12-16 10:03:13,391 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-12-16 10:03:13,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-12-16 10:03:13,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:03:13,392 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-16 10:03:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-12-16 10:03:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-16 10:03:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 10:03:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-16 10:03:13,394 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-16 10:03:13,394 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-16 10:03:13,394 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-16 10:03:13,394 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-12-16 10:03:13,395 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-12-16 10:03:13,395 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:03:13,395 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:03:13,395 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:03:13,395 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-16 10:03:13,396 INFO L791 eck$LassoCheckResult]: Stem: 195#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(11, 2);call #Ultimate.allocInit(12, 3); 196#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 201#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret4 := fibo(~n - 1);< 202#fiboENTRY ~n := #in~n; 208#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 212#fiboFINAL assume true; 214#fiboEXIT >#33#return; 198#L13-1 [2021-12-16 10:03:13,396 INFO L793 eck$LassoCheckResult]: Loop: 198#L13-1 call #t~ret5 := fibo(~n - 2);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume !(1 == ~n); 197#L13 call #t~ret4 := fibo(~n - 1);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume 1 == ~n;#res := 1; 216#fiboFINAL assume true; 213#fiboEXIT >#33#return; 198#L13-1 [2021-12-16 10:03:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-12-16 10:03:13,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441715280] [2021-12-16 10:03:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:13,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:13,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 10:03:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:03:13,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:03:13,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441715280] [2021-12-16 10:03:13,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441715280] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 10:03:13,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259076923] [2021-12-16 10:03:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:13,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 10:03:13,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:13,439 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) [2021-12-16 10:03:13,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 10:03:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 10:03:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:03:13,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 10:03:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:03:13,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259076923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 10:03:13,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 10:03:13,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-16 10:03:13,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901717476] [2021-12-16 10:03:13,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 10:03:13,634 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-16 10:03:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-12-16 10:03:13,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:13,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050833840] [2021-12-16 10:03:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:13,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:13,639 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:03:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:13,643 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:03:13,728 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:03:13,729 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:03:13,729 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:03:13,729 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:03:13,729 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 10:03:13,729 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:13,729 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:03:13,729 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:03:13,729 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2021-12-16 10:03:13,729 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:03:13,730 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:03:13,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:13,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:13,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:13,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:13,764 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:03:13,765 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 10:03:13,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:13,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:13,766 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:13,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-16 10:03:13,769 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:03:13,769 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:13,785 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:03:13,785 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:03:13,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-12-16 10:03:13,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:13,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:13,803 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:13,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-16 10:03:13,836 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:03:13,836 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:13,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:13,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:13,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:13,867 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:13,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-16 10:03:13,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 10:03:13,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:14,650 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 10:03:14,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:14,655 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:03:14,655 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:03:14,656 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:03:14,656 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:03:14,656 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 10:03:14,656 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:14,656 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:03:14,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:03:14,656 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2021-12-16 10:03:14,656 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:03:14,656 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:03:14,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:14,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:14,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:14,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:14,695 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:03:14,695 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 10:03:14,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:14,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:14,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:14,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-16 10:03:14,699 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 10:03:14,705 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:03:14,705 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:03:14,705 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:03:14,705 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:03:14,705 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:03:14,706 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:03:14,706 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:03:14,727 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:03:14,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:14,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:14,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:14,745 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:14,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-16 10:03:14,748 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 10:03:14,753 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:03:14,754 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:03:14,754 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:03:14,754 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:03:14,754 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:03:14,754 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:03:14,754 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:03:14,770 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:03:14,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:14,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:14,796 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:14,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-16 10:03:14,799 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 10:03:14,806 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:03:14,806 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:03:14,806 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:03:14,806 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:03:14,806 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:03:14,808 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:03:14,808 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:03:14,821 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 10:03:14,825 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 10:03:14,825 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 10:03:14,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:14,827 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:14,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-16 10:03:14,829 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 10:03:14,829 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 10:03:14,829 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 10:03:14,829 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-12-16 10:03:14,846 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 [2021-12-16 10:03:14,847 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 10:03:14,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 10:03:14,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 10:03:15,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:15,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 10:03:15,164 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-12-16 10:03:15,165 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 10:03:15,298 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2021-12-16 10:03:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-12-16 10:03:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 10:03:15,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-12-16 10:03:15,300 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-12-16 10:03:15,301 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:15,301 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-12-16 10:03:15,301 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:15,301 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-12-16 10:03:15,302 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:15,302 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-12-16 10:03:15,306 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-16 10:03:15,309 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-12-16 10:03:15,309 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-12-16 10:03:15,310 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-12-16 10:03:15,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-12-16 10:03:15,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:03:15,310 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-12-16 10:03:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-12-16 10:03:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-12-16 10:03:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2021-12-16 10:03:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-12-16 10:03:15,318 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-12-16 10:03:15,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 10:03:15,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 10:03:15,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-16 10:03:15,319 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 10:03:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 10:03:15,406 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2021-12-16 10:03:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 10:03:15,406 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2021-12-16 10:03:15,409 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-16 10:03:15,411 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2021-12-16 10:03:15,411 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-12-16 10:03:15,411 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-12-16 10:03:15,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2021-12-16 10:03:15,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:03:15,412 INFO L681 BuchiCegarLoop]: Abstraction has 118 states and 160 transitions. [2021-12-16 10:03:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2021-12-16 10:03:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-12-16 10:03:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-16 10:03:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-12-16 10:03:15,419 INFO L704 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-16 10:03:15,419 INFO L587 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-12-16 10:03:15,419 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-16 10:03:15,419 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2021-12-16 10:03:15,421 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-12-16 10:03:15,421 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:03:15,421 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:03:15,422 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:03:15,422 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-12-16 10:03:15,422 INFO L791 eck$LassoCheckResult]: Stem: 789#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 790#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 804#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 806#fiboENTRY ~n := #in~n; 854#L8 assume !(~n < 1); 853#L10 assume !(1 == ~n); 803#L13 call #t~ret4 := fibo(~n - 1);< 805#fiboENTRY ~n := #in~n; 815#L8 assume !(~n < 1); 820#L10 assume !(1 == ~n); 826#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 852#L8 assume !(~n < 1); 850#L10 assume 1 == ~n;#res := 1; 848#fiboFINAL assume true; 846#fiboEXIT >#33#return; 792#L13-1 call #t~ret5 := fibo(~n - 2);< 844#fiboENTRY ~n := #in~n; 892#L8 assume ~n < 1;#res := 0; 891#fiboFINAL assume true; 890#fiboEXIT >#35#return; 889#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 887#fiboFINAL assume true; 879#fiboEXIT >#33#return; 824#L13-1 [2021-12-16 10:03:15,422 INFO L793 eck$LassoCheckResult]: Loop: 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume ~n < 1;#res := 0; 885#fiboFINAL assume true; 883#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#33#return; 824#L13-1 [2021-12-16 10:03:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 1 times [2021-12-16 10:03:15,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:15,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147563452] [2021-12-16 10:03:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:15,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 10:03:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 10:03:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 10:03:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 10:03:15,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:03:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147563452] [2021-12-16 10:03:15,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147563452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 10:03:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358710055] [2021-12-16 10:03:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:15,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 10:03:15,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:15,531 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) [2021-12-16 10:03:15,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 10:03:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 10:03:15,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 10:03:15,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 10:03:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 10:03:15,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358710055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 10:03:15,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 10:03:15,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 18 [2021-12-16 10:03:15,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982937118] [2021-12-16 10:03:15,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 10:03:15,793 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-16 10:03:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-12-16 10:03:15,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:15,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162765988] [2021-12-16 10:03:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:15,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 10:03:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 10:03:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 10:03:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 10:03:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 10:03:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-16 10:03:15,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:03:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162765988] [2021-12-16 10:03:15,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162765988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 10:03:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623660839] [2021-12-16 10:03:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:15,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 10:03:15,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:15,864 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 10:03:15,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 10:03:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:15,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 10:03:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 10:03:15,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 10:03:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-16 10:03:16,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623660839] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 10:03:16,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 10:03:16,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-16 10:03:16,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238592258] [2021-12-16 10:03:16,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 10:03:16,090 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-16 10:03:16,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 10:03:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 10:03:16,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-12-16 10:03:16,091 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 11 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-16 10:03:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 10:03:16,318 INFO L93 Difference]: Finished difference Result 146 states and 193 transitions. [2021-12-16 10:03:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 10:03:16,319 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 146 states and 193 transitions. [2021-12-16 10:03:16,322 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-12-16 10:03:16,324 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 146 states to 139 states and 186 transitions. [2021-12-16 10:03:16,324 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94 [2021-12-16 10:03:16,324 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 94 [2021-12-16 10:03:16,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 186 transitions. [2021-12-16 10:03:16,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:03:16,325 INFO L681 BuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-12-16 10:03:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 186 transitions. [2021-12-16 10:03:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-16 10:03:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 92 states have internal predecessors, (101), 33 states have call successors, (34), 17 states have call predecessors, (34), 20 states have return successors, (51), 29 states have call predecessors, (51), 30 states have call successors, (51) [2021-12-16 10:03:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 186 transitions. [2021-12-16 10:03:16,332 INFO L704 BuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-12-16 10:03:16,332 INFO L587 BuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-12-16 10:03:16,332 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-16 10:03:16,332 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 139 states and 186 transitions. [2021-12-16 10:03:16,334 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-12-16 10:03:16,334 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 10:03:16,334 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 10:03:16,335 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 10:03:16,335 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-16 10:03:16,335 INFO L791 eck$LassoCheckResult]: Stem: 1564#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3); 1565#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 7; 1579#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1580#fiboENTRY ~n := #in~n; 1640#L8 assume !(~n < 1); 1600#L10 assume !(1 == ~n); 1577#L13 call #t~ret4 := fibo(~n - 1);< 1589#fiboENTRY ~n := #in~n; 1590#L8 assume !(~n < 1); 1597#L10 assume !(1 == ~n); 1576#L13 call #t~ret4 := fibo(~n - 1);< 1578#fiboENTRY ~n := #in~n; 1639#L8 assume !(~n < 1); 1638#L10 assume !(1 == ~n); 1634#L13 call #t~ret4 := fibo(~n - 1);< 1637#fiboENTRY ~n := #in~n; 1636#L8 assume !(~n < 1); 1635#L10 assume !(1 == ~n); 1621#L13 call #t~ret4 := fibo(~n - 1);< 1627#fiboENTRY ~n := #in~n; 1633#L8 assume !(~n < 1); 1632#L10 assume !(1 == ~n); 1622#L13 call #t~ret4 := fibo(~n - 1);< 1627#fiboENTRY ~n := #in~n; 1633#L8 assume !(~n < 1); 1632#L10 assume !(1 == ~n); 1622#L13 call #t~ret4 := fibo(~n - 1);< 1627#fiboENTRY ~n := #in~n; 1631#L8 assume !(~n < 1); 1630#L10 assume 1 == ~n;#res := 1; 1628#fiboFINAL assume true; 1626#fiboEXIT >#33#return; 1567#L13-1 call #t~ret5 := fibo(~n - 2);< 1623#fiboENTRY ~n := #in~n; 1642#L8 assume ~n < 1;#res := 0; 1688#fiboFINAL assume true; 1686#fiboEXIT >#35#return; 1682#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1680#fiboFINAL assume true; 1663#fiboEXIT >#33#return; 1583#L13-1 [2021-12-16 10:03:16,335 INFO L793 eck$LassoCheckResult]: Loop: 1583#L13-1 call #t~ret5 := fibo(~n - 2);< 1575#fiboENTRY ~n := #in~n; 1588#L8 assume !(~n < 1); 1598#L10 assume !(1 == ~n); 1587#L13 call #t~ret4 := fibo(~n - 1);< 1575#fiboENTRY ~n := #in~n; 1588#L8 assume !(~n < 1); 1598#L10 assume !(1 == ~n); 1587#L13 call #t~ret4 := fibo(~n - 1);< 1575#fiboENTRY ~n := #in~n; 1588#L8 assume !(~n < 1); 1598#L10 assume 1 == ~n;#res := 1; 1599#fiboFINAL assume true; 1693#fiboEXIT >#33#return; 1668#L13-1 call #t~ret5 := fibo(~n - 2);< 1678#fiboENTRY ~n := #in~n; 1702#L8 assume ~n < 1;#res := 0; 1641#fiboFINAL assume true; 1694#fiboEXIT >#35#return; 1591#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1699#fiboFINAL assume true; 1664#fiboEXIT >#33#return; 1583#L13-1 [2021-12-16 10:03:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:16,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1856310800, now seen corresponding path program 2 times [2021-12-16 10:03:16,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:16,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686048129] [2021-12-16 10:03:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:16,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:16,344 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:03:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:16,354 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:03:16,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 2 times [2021-12-16 10:03:16,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:16,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962842754] [2021-12-16 10:03:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:16,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:16,359 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 10:03:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 10:03:16,363 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 10:03:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -705851003, now seen corresponding path program 3 times [2021-12-16 10:03:16,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 10:03:16,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192872118] [2021-12-16 10:03:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 10:03:16,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 10:03:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:16,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 10:03:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:16,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 10:03:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:16,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 10:03:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:16,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-16 10:03:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:16,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 10:03:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:16,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 10:03:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 70 proven. 100 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-16 10:03:16,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 10:03:16,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192872118] [2021-12-16 10:03:16,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192872118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 10:03:16,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109097457] [2021-12-16 10:03:16,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 10:03:16,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 10:03:16,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:16,532 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 10:03:16,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 10:03:16,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-16 10:03:16,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 10:03:16,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 10:03:16,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-16 10:03:16,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 10:03:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 87 proven. 49 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-16 10:03:17,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109097457] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 10:03:17,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 10:03:17,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 12] total 27 [2021-12-16 10:03:17,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037028730] [2021-12-16 10:03:17,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 10:03:17,155 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:03:17,156 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:03:17,156 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:03:17,156 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:03:17,156 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 10:03:17,156 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:17,156 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:03:17,156 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:03:17,156 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2021-12-16 10:03:17,156 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:03:17,156 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:03:17,156 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:17,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:17,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:17,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:17,185 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:03:17,186 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 10:03:17,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:17,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:17,187 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:17,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-16 10:03:17,189 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:03:17,189 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:17,195 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 10:03:17,195 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 10:03:17,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-12-16 10:03:17,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:17,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:17,211 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:17,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-16 10:03:17,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 10:03:17,213 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:17,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-12-16 10:03:17,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:17,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:17,250 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:17,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-16 10:03:17,252 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 10:03:17,252 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 10:03:18,495 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 10:03:18,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-12-16 10:03:18,500 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 10:03:18,500 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 10:03:18,500 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 10:03:18,500 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 10:03:18,500 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 10:03:18,500 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:18,500 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 10:03:18,500 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 10:03:18,500 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2021-12-16 10:03:18,500 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 10:03:18,500 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 10:03:18,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:18,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:18,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:18,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 10:03:18,544 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 10:03:18,545 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 10:03:18,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:18,546 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:18,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-16 10:03:18,550 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 10:03:18,556 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:03:18,556 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:03:18,556 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:03:18,556 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:03:18,556 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:03:18,557 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:03:18,557 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:03:18,576 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 10:03:18,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-12-16 10:03:18,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:18,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:18,594 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:18,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-16 10:03:18,597 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 10:03:18,603 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 10:03:18,603 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 10:03:18,603 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 10:03:18,603 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 10:03:18,603 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 10:03:18,604 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 10:03:18,604 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 10:03:18,613 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 10:03:18,614 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-16 10:03:18,614 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-16 10:03:18,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 10:03:18,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 10:03:18,616 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 10:03:18,620 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 10:03:18,620 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 10:03:18,620 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 10:03:18,620 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-12-16 10:03:18,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-12-16 10:03:18,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2021-12-16 10:03:18,638 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 10:03:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 10:03:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:18,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:18,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 10:03:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 10:03:19,101 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 [2021-12-16 10:03:19,101 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 10:03:19,255 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 272 states and 374 transitions. Complement of second has 45 states. [2021-12-16 10:03:19,257 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 [2021-12-16 10:03:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 10:03:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-12-16 10:03:19,258 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 40 letters. Loop has 22 letters. [2021-12-16 10:03:19,258 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:19,258 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 10:03:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 10:03:19,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:19,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 10:03:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 10:03:19,625 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 [2021-12-16 10:03:19,625 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 10:03:19,726 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 333 states and 447 transitions. Complement of second has 25 states. [2021-12-16 10:03:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-12-16 10:03:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 10:03:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-12-16 10:03:19,727 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 40 letters. Loop has 22 letters. [2021-12-16 10:03:19,727 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:19,727 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 10:03:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 10:03:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 10:03:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 10:03:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 10:03:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 10:03:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 10:03:20,091 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 [2021-12-16 10:03:20,091 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 10:03:20,275 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1179 states and 1649 transitions. Complement of second has 138 states. [2021-12-16 10:03:20,275 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 [2021-12-16 10:03:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 10:03:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-12-16 10:03:20,276 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 40 letters. Loop has 22 letters. [2021-12-16 10:03:20,277 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:20,277 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 62 letters. Loop has 22 letters. [2021-12-16 10:03:20,278 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:20,278 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 40 letters. Loop has 44 letters. [2021-12-16 10:03:20,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 10:03:20,280 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1179 states and 1649 transitions. [2021-12-16 10:03:20,292 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-12-16 10:03:20,305 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1179 states to 679 states and 1031 transitions. [2021-12-16 10:03:20,306 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 271 [2021-12-16 10:03:20,307 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 302 [2021-12-16 10:03:20,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 679 states and 1031 transitions. [2021-12-16 10:03:20,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 10:03:20,308 INFO L681 BuchiCegarLoop]: Abstraction has 679 states and 1031 transitions. [2021-12-16 10:03:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states and 1031 transitions. [2021-12-16 10:03:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 521. [2021-12-16 10:03:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 317 states have (on average 1.1892744479495267) internal successors, (377), 340 states have internal predecessors, (377), 121 states have call successors, (135), 62 states have call predecessors, (135), 83 states have return successors, (236), 118 states have call predecessors, (236), 115 states have call successors, (236) [2021-12-16 10:03:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 748 transitions. [2021-12-16 10:03:20,343 INFO L704 BuchiCegarLoop]: Abstraction has 521 states and 748 transitions. [2021-12-16 10:03:20,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 10:03:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 10:03:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-12-16 10:03:20,344 INFO L87 Difference]: Start difference. First operand 521 states and 748 transitions. Second operand has 27 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 15 states have call successors, (21), 8 states have call predecessors, (21), 6 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-16 10:03:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 10:03:20,835 INFO L93 Difference]: Finished difference Result 319 states and 372 transitions. [2021-12-16 10:03:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-16 10:03:20,836 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 319 states and 372 transitions. [2021-12-16 10:03:20,838 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 10:03:20,838 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 319 states to 0 states and 0 transitions. [2021-12-16 10:03:20,838 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-16 10:03:20,839 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-16 10:03:20,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-16 10:03:20,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 10:03:20,839 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 10:03:20,839 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 10:03:20,839 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-16 10:03:20,839 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-16 10:03:20,839 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-16 10:03:20,839 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-16 10:03:20,839 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-16 10:03:20,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 16.12 10:03:20 BoogieIcfgContainer [2021-12-16 10:03:20,844 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-16 10:03:20,844 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 10:03:20,844 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 10:03:20,844 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 10:03:20,845 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:03:11" (3/4) ... [2021-12-16 10:03:20,846 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 10:03:20,846 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 10:03:20,847 INFO L158 Benchmark]: Toolchain (without parser) took 9236.37ms. Allocated memory was 88.1MB in the beginning and 157.3MB in the end (delta: 69.2MB). Free memory was 57.2MB in the beginning and 99.4MB in the end (delta: -42.3MB). Peak memory consumption was 26.6MB. Max. memory is 16.1GB. [2021-12-16 10:03:20,847 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 88.1MB. Free memory was 45.6MB in the beginning and 45.5MB in the end (delta: 47.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 10:03:20,847 INFO L158 Benchmark]: CACSL2BoogieTranslator took 134.67ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 56.9MB in the beginning and 108.4MB in the end (delta: -51.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 10:03:20,848 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.88ms. Allocated memory is still 130.0MB. Free memory was 108.4MB in the beginning and 107.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 10:03:20,848 INFO L158 Benchmark]: Boogie Preprocessor took 13.23ms. Allocated memory is still 130.0MB. Free memory was 107.1MB in the beginning and 106.3MB in the end (delta: 767.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 10:03:20,848 INFO L158 Benchmark]: RCFGBuilder took 205.00ms. Allocated memory is still 130.0MB. Free memory was 106.3MB in the beginning and 97.2MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 10:03:20,848 INFO L158 Benchmark]: BuchiAutomizer took 8856.98ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 97.2MB in the beginning and 99.4MB in the end (delta: -2.2MB). Peak memory consumption was 27.6MB. Max. memory is 16.1GB. [2021-12-16 10:03:20,848 INFO L158 Benchmark]: Witness Printer took 2.15ms. Allocated memory is still 157.3MB. Free memory is still 99.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 10:03:20,850 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 88.1MB. Free memory was 45.6MB in the beginning and 45.5MB in the end (delta: 47.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 134.67ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 56.9MB in the beginning and 108.4MB in the end (delta: -51.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.88ms. Allocated memory is still 130.0MB. Free memory was 108.4MB in the beginning and 107.1MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.23ms. Allocated memory is still 130.0MB. Free memory was 107.1MB in the beginning and 106.3MB in the end (delta: 767.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 205.00ms. Allocated memory is still 130.0MB. Free memory was 106.3MB in the beginning and 97.2MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 8856.98ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 97.2MB in the beginning and 99.4MB in the end (delta: -2.2MB). Peak memory consumption was 27.6MB. Max. memory is 16.1GB. * Witness Printer took 2.15ms. Allocated memory is still 157.3MB. Free memory is still 99.4MB. 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 7 terminating modules (4 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. 4 modules have a trivial ranking function, the largest among these consists of 27 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.8s and 6 iterations. TraceHistogramMax:8. Analysis of lassos took 5.3s. Construction of modules took 0.5s. Büchi inclusion checks took 2.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 189 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 139 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 453 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 437 mSDsluCounter, 442 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 304 mSDsCounter, 336 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1133 IncrementalHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 336 mSolverCounterUnsat, 138 mSDtfsCounter, 1133 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf95 lsp87 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq195 hnf91 smp89 dnf100 smp100 tf109 neg98 sie103 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 24ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-16 10:03:20,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-16 10:03:21,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-16 10:03:21,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-16 10:03:21,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 10:03:21,689 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