./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive/Fibonacci03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive/Fibonacci03.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 be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 16:00:12,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 16:00:12,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 16:00:12,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 16:00:12,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 16:00:12,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 16:00:12,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 16:00:12,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 16:00:12,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 16:00:12,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 16:00:12,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 16:00:12,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 16:00:12,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 16:00:12,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 16:00:12,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 16:00:12,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 16:00:12,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 16:00:12,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 16:00:12,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 16:00:12,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 16:00:12,971 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 16:00:12,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 16:00:12,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 16:00:12,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 16:00:12,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 16:00:12,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 16:00:12,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 16:00:12,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 16:00:12,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 16:00:12,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 16:00:12,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 16:00:12,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 16:00:12,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 16:00:12,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 16:00:12,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 16:00:12,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 16:00:12,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 16:00:12,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 16:00:12,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 16:00:12,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 16:00:12,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 16:00:12,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 16:00:12,989 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-07-14 16:00:13,020 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 16:00:13,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 16:00:13,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 16:00:13,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 16:00:13,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 16:00:13,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 16:00:13,022 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 16:00:13,023 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-14 16:00:13,023 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-14 16:00:13,023 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-14 16:00:13,023 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-14 16:00:13,024 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-14 16:00:13,024 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-14 16:00:13,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 16:00:13,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 16:00:13,024 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 16:00:13,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 16:00:13,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 16:00:13,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 16:00:13,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-14 16:00:13,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-14 16:00:13,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-14 16:00:13,026 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 16:00:13,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-14 16:00:13,026 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-14 16:00:13,026 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 16:00:13,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-14 16:00:13,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 16:00:13,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 16:00:13,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 16:00:13,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 16:00:13,032 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-14 16:00:13,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 [2022-07-14 16:00:13,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 16:00:13,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 16:00:13,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 16:00:13,196 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 16:00:13,196 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 16:00:13,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci03.c [2022-07-14 16:00:13,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29474a7b5/494569211e17439588c7d1ef2bad0d77/FLAGb8c6ace2e [2022-07-14 16:00:13,658 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 16:00:13,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci03.c [2022-07-14 16:00:13,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29474a7b5/494569211e17439588c7d1ef2bad0d77/FLAGb8c6ace2e [2022-07-14 16:00:14,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29474a7b5/494569211e17439588c7d1ef2bad0d77 [2022-07-14 16:00:14,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 16:00:14,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 16:00:14,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 16:00:14,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 16:00:14,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 16:00:14,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6909664d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14, skipping insertion in model container [2022-07-14 16:00:14,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 16:00:14,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 16:00:14,149 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/Fibonacci03.c[788,801] [2022-07-14 16:00:14,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 16:00:14,161 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 16:00:14,170 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/Fibonacci03.c[788,801] [2022-07-14 16:00:14,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 16:00:14,179 INFO L208 MainTranslator]: Completed translation [2022-07-14 16:00:14,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14 WrapperNode [2022-07-14 16:00:14,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 16:00:14,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 16:00:14,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 16:00:14,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 16:00:14,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,203 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-07-14 16:00:14,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 16:00:14,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 16:00:14,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 16:00:14,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 16:00:14,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 16:00:14,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 16:00:14,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 16:00:14,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 16:00:14,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (1/1) ... [2022-07-14 16:00:14,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:14,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-07-14 16:00:14,288 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-07-14 16:00:14,289 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-07-14 16:00:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 16:00:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 16:00:14,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 16:00:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 16:00:14,334 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 16:00:14,335 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 16:00:14,441 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 16:00:14,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 16:00:14,447 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-14 16:00:14,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 04:00:14 BoogieIcfgContainer [2022-07-14 16:00:14,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 16:00:14,450 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-14 16:00:14,450 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-14 16:00:14,452 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-14 16:00:14,452 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 16:00:14,452 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 14.07 04:00:14" (1/3) ... [2022-07-14 16:00:14,453 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4fa82df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 04:00:14, skipping insertion in model container [2022-07-14 16:00:14,454 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 16:00:14,454 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 04:00:14" (2/3) ... [2022-07-14 16:00:14,454 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4fa82df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 14.07 04:00:14, skipping insertion in model container [2022-07-14 16:00:14,454 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-14 16:00:14,454 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 04:00:14" (3/3) ... [2022-07-14 16:00:14,455 INFO L354 chiAutomizerObserver]: Analyzing ICFG Fibonacci03.c [2022-07-14 16:00:14,535 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-14 16:00:14,535 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-14 16:00:14,535 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-14 16:00:14,535 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-14 16:00:14,535 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-14 16:00:14,535 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-14 16:00:14,535 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-14 16:00:14,535 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-14 16:00:14,559 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 16:00:14,573 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:14,580 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:14,580 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:14,585 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-07-14 16:00:14,586 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:00:14,586 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-14 16:00:14,586 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 16:00:14,589 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:14,590 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:14,590 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:14,590 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-07-14 16:00:14,591 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:00:14,596 INFO L752 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 13#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 10#L29true assume !(main_~x~0#1 > 46); 14#L32true call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 4#fibonacciENTRYtrue [2022-07-14 16:00:14,597 INFO L754 eck$LassoCheckResult]: Loop: 4#fibonacciENTRYtrue ~n := #in~n; 5#L17true assume !(~n < 1); 18#L19true assume !(1 == ~n); 17#L22true call #t~ret4 := fibonacci(~n - 1);< 4#fibonacciENTRYtrue [2022-07-14 16:00:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:14,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1325876, now seen corresponding path program 1 times [2022-07-14 16:00:14,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:14,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211254405] [2022-07-14 16:00:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:14,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,671 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,697 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 1 times [2022-07-14 16:00:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:14,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264587436] [2022-07-14 16:00:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,717 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:14,727 INFO L85 PathProgramCache]: Analyzing trace with hash 408654161, now seen corresponding path program 1 times [2022-07-14 16:00:14,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:14,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638877306] [2022-07-14 16:00:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:14,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,747 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:14,755 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:14,856 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:14,857 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:14,857 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:14,857 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:14,857 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:00:14,858 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,858 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:14,858 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:14,858 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration1_Loop [2022-07-14 16:00:14,858 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:14,858 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:14,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:14,952 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:14,953 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:00:14,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:14,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:14,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:14,960 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:14,960 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:14,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-07-14 16:00:14,982 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:14,982 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:15,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:15,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:15,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-07-14 16:00:15,045 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:15,045 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:15,067 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:15,067 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret5=0} Honda state: {fibonacci_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:15,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:15,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,091 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:15,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-07-14 16:00:15,094 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:15,094 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:15,101 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:15,101 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:15,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:15,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:15,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-07-14 16:00:15,122 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:15,122 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:15,166 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 [2022-07-14 16:00:15,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:15,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-07-14 16:00:15,177 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:00:15,177 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:15,236 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:00:15,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:15,240 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:15,240 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:15,240 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:15,240 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:15,240 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:00:15,240 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,240 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:15,240 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:15,240 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration1_Loop [2022-07-14 16:00:15,240 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:15,241 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:15,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:15,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:15,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:15,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:15,258 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:15,292 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:15,295 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:00:15,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,297 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-07-14 16:00:15,300 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:15,306 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:15,306 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:15,307 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:15,307 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:15,307 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:15,308 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:15,308 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:15,309 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:15,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:15,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,327 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:15,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-07-14 16:00:15,336 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:15,342 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:15,342 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:15,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:15,343 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:15,343 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:15,343 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:15,343 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:15,351 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:15,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:15,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:15,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-07-14 16:00:15,370 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:15,376 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:15,376 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:15,376 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:15,377 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:15,377 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:15,377 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:15,377 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:15,386 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:15,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:15,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,404 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:15,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-07-14 16:00:15,406 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:15,413 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:15,413 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:15,413 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:15,413 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:15,413 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:15,414 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:15,414 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:15,419 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:00:15,423 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:00:15,423 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:00:15,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:15,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:15,428 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:15,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-07-14 16:00:15,431 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:00:15,431 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:00:15,431 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:00:15,431 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2022-07-14 16:00:15,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:15,451 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:00:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 16:00:15,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:15,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:15,621 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-07-14 16:00:15,622 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 16:00:15,696 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 51 states and 63 transitions. Complement of second has 12 states. [2022-07-14 16:00:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-14 16:00:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 16:00:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2022-07-14 16:00:15,739 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2022-07-14 16:00:15,740 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:15,740 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2022-07-14 16:00:15,740 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:15,740 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2022-07-14 16:00:15,740 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:15,741 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 63 transitions. [2022-07-14 16:00:15,748 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:15,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:15,763 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 26 states and 35 transitions. [2022-07-14 16:00:15,764 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2022-07-14 16:00:15,765 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2022-07-14 16:00:15,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2022-07-14 16:00:15,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:15,765 INFO L369 hiAutomatonCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-14 16:00:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2022-07-14 16:00:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-07-14 16:00:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 16:00:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-07-14 16:00:15,786 INFO L392 hiAutomatonCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-07-14 16:00:15,786 INFO L374 stractBuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-07-14 16:00:15,786 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-14 16:00:15,787 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 27 transitions. [2022-07-14 16:00:15,787 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:15,787 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:15,787 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:15,788 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:15,788 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:15,788 INFO L752 eck$LassoCheckResult]: Stem: 140#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 141#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 143#L29 assume !(main_~x~0#1 > 46); 131#L32 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 133#fibonacciENTRY ~n := #in~n; 134#L17 assume !(~n < 1); 139#L19 assume !(1 == ~n); 129#L22 call #t~ret4 := fibonacci(~n - 1);< 135#fibonacciENTRY ~n := #in~n; 136#L17 assume ~n < 1;#res := 0; 137#fibonacciFINAL assume true; 142#fibonacciEXIT >#34#return; 128#L22-1 [2022-07-14 16:00:15,789 INFO L754 eck$LassoCheckResult]: Loop: 128#L22-1 call #t~ret5 := fibonacci(~n - 2);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume !(~n < 1); 147#L19 assume !(1 == ~n); 130#L22 call #t~ret4 := fibonacci(~n - 1);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume ~n < 1;#res := 0; 145#fibonacciFINAL assume true; 146#fibonacciEXIT >#34#return; 128#L22-1 [2022-07-14 16:00:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1923124650, now seen corresponding path program 1 times [2022-07-14 16:00:15,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927562310] [2022-07-14 16:00:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:15,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-14 16:00:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 16:00:15,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:15,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927562310] [2022-07-14 16:00:15,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927562310] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 16:00:15,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 16:00:15,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 16:00:15,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438466577] [2022-07-14 16:00:15,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 16:00:15,850 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-14 16:00:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 481649848, now seen corresponding path program 1 times [2022-07-14 16:00:15,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:15,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637085368] [2022-07-14 16:00:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:15,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-14 16:00:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 16:00:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:15,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637085368] [2022-07-14 16:00:15,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637085368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 16:00:15,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 16:00:15,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 16:00:15,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805703771] [2022-07-14 16:00:15,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 16:00:15,885 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-14 16:00:15,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:00:15,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 16:00:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 16:00:15,888 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 16:00:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:00:15,952 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-07-14 16:00:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 16:00:15,953 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 33 transitions. [2022-07-14 16:00:15,958 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:15,962 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 25 states and 31 transitions. [2022-07-14 16:00:15,962 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2022-07-14 16:00:15,963 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2022-07-14 16:00:15,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 31 transitions. [2022-07-14 16:00:15,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:15,964 INFO L369 hiAutomatonCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-14 16:00:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 31 transitions. [2022-07-14 16:00:15,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-14 16:00:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 16:00:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-14 16:00:15,968 INFO L392 hiAutomatonCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-14 16:00:15,968 INFO L374 stractBuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-14 16:00:15,968 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-14 16:00:15,968 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 31 transitions. [2022-07-14 16:00:15,969 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:15,969 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:15,969 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:15,970 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:15,970 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-14 16:00:15,970 INFO L752 eck$LassoCheckResult]: Stem: 215#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 216#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 219#L29 assume !(main_~x~0#1 > 46); 204#L32 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 221#fibonacciENTRY ~n := #in~n; 210#L17 assume !(~n < 1); 214#L19 assume !(1 == ~n); 205#L22 call #t~ret4 := fibonacci(~n - 1);< 209#fibonacciENTRY ~n := #in~n; 211#L17 assume !(~n < 1); 227#L19 assume 1 == ~n;#res := 1; 226#fibonacciFINAL assume true; 225#fibonacciEXIT >#34#return; 203#L22-1 [2022-07-14 16:00:15,970 INFO L754 eck$LassoCheckResult]: Loop: 203#L22-1 call #t~ret5 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret4 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret4 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume 1 == ~n;#res := 1; 222#fibonacciFINAL assume true; 223#fibonacciEXIT >#34#return; 203#L22-1 call #t~ret5 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume ~n < 1;#res := 0; 212#fibonacciFINAL assume true; 217#fibonacciEXIT >#36#return; 218#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 220#fibonacciFINAL assume true; 224#fibonacciEXIT >#34#return; 203#L22-1 [2022-07-14 16:00:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash -512653656, now seen corresponding path program 1 times [2022-07-14 16:00:15,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:15,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929113734] [2022-07-14 16:00:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:15,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:15,982 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:15,994 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 1 times [2022-07-14 16:00:15,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:15,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393127966] [2022-07-14 16:00:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:15,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:16,002 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:16,009 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash 911295463, now seen corresponding path program 1 times [2022-07-14 16:00:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:16,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334038717] [2022-07-14 16:00:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:16,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:16,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-14 16:00:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:16,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-14 16:00:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:16,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:00:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:16,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:00:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 16:00:16,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:16,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334038717] [2022-07-14 16:00:16,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334038717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:00:16,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327857469] [2022-07-14 16:00:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:16,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:00:16,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:16,117 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 16:00:16,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 16:00:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 16:00:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 16:00:16,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:00:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 16:00:16,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327857469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:00:16,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:00:16,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-07-14 16:00:16,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529221342] [2022-07-14 16:00:16,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:00:16,436 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:16,436 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:16,436 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:16,436 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:16,437 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:00:16,437 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:16,437 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:16,437 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:16,437 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration3_Loop [2022-07-14 16:00:16,437 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:16,437 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:16,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:16,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:16,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:16,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:16,473 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:16,473 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:00:16,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:16,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:16,475 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:16,486 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:16,486 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-07-14 16:00:16,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:16,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:16,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:16,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:16,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-07-14 16:00:16,560 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:00:16,560 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:17,159 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:00:17,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:17,163 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:17,163 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:17,163 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:17,163 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:17,163 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:00:17,163 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,163 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:17,163 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:17,163 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration3_Loop [2022-07-14 16:00:17,163 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:17,163 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:17,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,176 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,179 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:17,231 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:17,231 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:00:17,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,232 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:17,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-07-14 16:00:17,234 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:17,242 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:17,242 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:17,242 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:17,242 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:17,242 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:17,243 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:17,243 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:17,253 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:17,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:17,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,271 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:17,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-07-14 16:00:17,272 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:17,278 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:17,278 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:17,278 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:17,278 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:17,278 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:17,278 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:17,278 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:17,279 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:17,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:17,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,296 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:17,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-07-14 16:00:17,298 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:17,304 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:17,304 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:17,304 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:17,304 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:17,304 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:17,306 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:17,306 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:17,307 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:17,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:17,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,325 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:17,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-07-14 16:00:17,327 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:17,333 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:17,333 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:17,333 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:17,333 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:17,333 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:17,334 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:17,334 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:17,353 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:00:17,356 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:00:17,356 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:00:17,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:17,372 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:17,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-07-14 16:00:17,374 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:00:17,374 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:00:17,374 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:00:17,374 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-14 16:00:17,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2022-07-14 16:00:17,391 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:00:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:17,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 16:00:17,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:17,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 16:00:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:00:17,677 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-14 16:00:17,677 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 16:00:17,895 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 160 states and 216 transitions. Complement of second has 48 states. [2022-07-14 16:00:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2022-07-14 16:00:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 16:00:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 42 transitions. [2022-07-14 16:00:17,899 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 22 letters. [2022-07-14 16:00:17,900 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:17,900 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 35 letters. Loop has 22 letters. [2022-07-14 16:00:17,901 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:17,901 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 44 letters. [2022-07-14 16:00:17,904 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:17,904 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 160 states and 216 transitions. [2022-07-14 16:00:17,908 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2022-07-14 16:00:17,911 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 160 states to 129 states and 181 transitions. [2022-07-14 16:00:17,911 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2022-07-14 16:00:17,912 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 80 [2022-07-14 16:00:17,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 181 transitions. [2022-07-14 16:00:17,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:17,926 INFO L369 hiAutomatonCegarLoop]: Abstraction has 129 states and 181 transitions. [2022-07-14 16:00:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states and 181 transitions. [2022-07-14 16:00:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2022-07-14 16:00:17,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2022-07-14 16:00:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2022-07-14 16:00:17,956 INFO L392 hiAutomatonCegarLoop]: Abstraction has 107 states and 141 transitions. [2022-07-14 16:00:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:00:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 16:00:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-14 16:00:17,957 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-14 16:00:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:00:18,011 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-14 16:00:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 16:00:18,012 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 58 transitions. [2022-07-14 16:00:18,017 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:18,020 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 42 states and 54 transitions. [2022-07-14 16:00:18,020 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2022-07-14 16:00:18,021 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2022-07-14 16:00:18,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 54 transitions. [2022-07-14 16:00:18,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:18,022 INFO L369 hiAutomatonCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-07-14 16:00:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 54 transitions. [2022-07-14 16:00:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-07-14 16:00:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-14 16:00:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-07-14 16:00:18,034 INFO L392 hiAutomatonCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-07-14 16:00:18,034 INFO L374 stractBuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-07-14 16:00:18,034 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-14 16:00:18,034 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 39 states and 48 transitions. [2022-07-14 16:00:18,035 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-14 16:00:18,035 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:18,035 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:18,036 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 16:00:18,036 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-14 16:00:18,036 INFO L752 eck$LassoCheckResult]: Stem: 991#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 992#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 995#L29 assume !(main_~x~0#1 > 46); 981#L32 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 983#fibonacciENTRY ~n := #in~n; 984#L17 assume !(~n < 1); 990#L19 assume !(1 == ~n); 980#L22 call #t~ret4 := fibonacci(~n - 1);< 982#fibonacciENTRY ~n := #in~n; 986#L17 assume !(~n < 1); 1013#L19 assume !(1 == ~n); 985#L22 call #t~ret4 := fibonacci(~n - 1);< 982#fibonacciENTRY ~n := #in~n; 987#L17 assume !(~n < 1); 997#L19 assume 1 == ~n;#res := 1; 998#fibonacciFINAL assume true; 1012#fibonacciEXIT >#34#return; 1007#L22-1 call #t~ret5 := fibonacci(~n - 2);< 1008#fibonacciENTRY ~n := #in~n; 1011#L17 assume ~n < 1;#res := 0; 1009#fibonacciFINAL assume true; 1006#fibonacciEXIT >#36#return; 1005#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1004#fibonacciFINAL assume true; 1003#fibonacciEXIT >#34#return; 977#L22-1 [2022-07-14 16:00:18,036 INFO L754 eck$LassoCheckResult]: Loop: 977#L22-1 call #t~ret5 := fibonacci(~n - 2);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume !(1 == ~n); 976#L22 call #t~ret4 := fibonacci(~n - 1);< 979#fibonacciENTRY ~n := #in~n; 1002#L17 assume !(~n < 1); 1000#L19 assume 1 == ~n;#res := 1; 1001#fibonacciFINAL assume true; 1010#fibonacciEXIT >#34#return; 975#L22-1 call #t~ret5 := fibonacci(~n - 2);< 978#fibonacciENTRY ~n := #in~n; 988#L17 assume ~n < 1;#res := 0; 989#fibonacciFINAL assume true; 993#fibonacciEXIT >#36#return; 994#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 996#fibonacciFINAL assume true; 999#fibonacciEXIT >#34#return; 977#L22-1 [2022-07-14 16:00:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:18,037 INFO L85 PathProgramCache]: Analyzing trace with hash 506180814, now seen corresponding path program 2 times [2022-07-14 16:00:18,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:18,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754558109] [2022-07-14 16:00:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:18,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:18,045 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:18,066 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 2 times [2022-07-14 16:00:18,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:18,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952206321] [2022-07-14 16:00:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:18,074 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:18,082 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1200508531, now seen corresponding path program 3 times [2022-07-14 16:00:18,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:18,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493350574] [2022-07-14 16:00:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:18,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-14 16:00:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:00:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:00:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-14 16:00:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:00:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:00:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-14 16:00:18,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:18,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493350574] [2022-07-14 16:00:18,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493350574] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:00:18,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545466649] [2022-07-14 16:00:18,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 16:00:18,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:00:18,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:18,209 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 16:00:18,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 16:00:18,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-14 16:00:18,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 16:00:18,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 16:00:18,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-14 16:00:18,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:00:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 16:00:18,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545466649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:00:18,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:00:18,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 12] total 21 [2022-07-14 16:00:18,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860432010] [2022-07-14 16:00:18,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:00:18,822 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:18,822 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:18,822 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:18,822 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:18,822 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:00:18,822 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:18,822 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:18,822 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:18,822 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration4_Loop [2022-07-14 16:00:18,822 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:18,822 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:18,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:18,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:18,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:18,835 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:18,877 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:18,877 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:00:18,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:18,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:18,878 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:18,885 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:18,886 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:18,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-07-14 16:00:18,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:18,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:18,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:18,927 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:18,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-07-14 16:00:18,945 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:00:18,945 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:19,547 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:00:19,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:19,553 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:19,553 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:19,553 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:19,553 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:19,553 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:00:19,553 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:19,553 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:19,553 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:19,554 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration4_Loop [2022-07-14 16:00:19,554 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:19,554 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:19,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:19,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:19,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:19,572 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:19,618 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:19,618 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:00:19,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:19,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:19,619 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:19,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-07-14 16:00:19,622 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:19,628 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:19,628 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:19,628 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:19,628 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:19,628 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:19,630 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:19,630 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:19,637 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:00:19,640 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-14 16:00:19,640 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-14 16:00:19,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:19,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:19,642 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:19,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-07-14 16:00:19,643 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:00:19,644 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:00:19,644 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:00:19,644 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2022-07-14 16:00:19,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:19,660 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:00:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:19,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 16:00:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:19,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 16:00:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:00:19,923 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-14 16:00:19,923 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:00:19,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:20,022 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2022-07-14 16:00:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-07-14 16:00:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:00:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2022-07-14 16:00:20,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2022-07-14 16:00:20,025 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:20,026 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:00:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:00:20,354 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-14 16:00:20,355 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:00:20,424 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2022-07-14 16:00:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-07-14 16:00:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:00:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2022-07-14 16:00:20,426 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2022-07-14 16:00:20,426 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:20,426 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:00:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:20,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 16:00:20,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 16:00:20,680 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-14 16:00:20,680 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:00:20,855 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 345 states and 444 transitions. Complement of second has 125 states. [2022-07-14 16:00:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2022-07-14 16:00:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 16:00:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 47 transitions. [2022-07-14 16:00:20,857 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 22 letters. [2022-07-14 16:00:20,857 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:20,857 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 47 letters. Loop has 22 letters. [2022-07-14 16:00:20,858 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:20,858 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 44 letters. [2022-07-14 16:00:20,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:20,859 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 444 transitions. [2022-07-14 16:00:20,863 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-14 16:00:20,865 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 220 states and 297 transitions. [2022-07-14 16:00:20,866 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2022-07-14 16:00:20,866 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 116 [2022-07-14 16:00:20,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 220 states and 297 transitions. [2022-07-14 16:00:20,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:20,867 INFO L369 hiAutomatonCegarLoop]: Abstraction has 220 states and 297 transitions. [2022-07-14 16:00:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states and 297 transitions. [2022-07-14 16:00:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 172. [2022-07-14 16:00:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 112 states have internal predecessors, (122), 38 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (59), 36 states have call predecessors, (59), 36 states have call successors, (59) [2022-07-14 16:00:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 223 transitions. [2022-07-14 16:00:20,891 INFO L392 hiAutomatonCegarLoop]: Abstraction has 172 states and 223 transitions. [2022-07-14 16:00:20,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:00:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 16:00:20,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-07-14 16:00:20,892 INFO L87 Difference]: Start difference. First operand 172 states and 223 transitions. Second operand has 21 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 13 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-14 16:00:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:00:21,104 INFO L93 Difference]: Finished difference Result 349 states and 503 transitions. [2022-07-14 16:00:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 16:00:21,107 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 503 transitions. [2022-07-14 16:00:21,110 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-14 16:00:21,114 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 339 states and 490 transitions. [2022-07-14 16:00:21,114 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2022-07-14 16:00:21,115 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 193 [2022-07-14 16:00:21,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 339 states and 490 transitions. [2022-07-14 16:00:21,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:21,116 INFO L369 hiAutomatonCegarLoop]: Abstraction has 339 states and 490 transitions. [2022-07-14 16:00:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states and 490 transitions. [2022-07-14 16:00:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 274. [2022-07-14 16:00:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 171 states have (on average 1.128654970760234) internal successors, (193), 174 states have internal predecessors, (193), 60 states have call successors, (72), 36 states have call predecessors, (72), 43 states have return successors, (136), 63 states have call predecessors, (136), 58 states have call successors, (136) [2022-07-14 16:00:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 401 transitions. [2022-07-14 16:00:21,136 INFO L392 hiAutomatonCegarLoop]: Abstraction has 274 states and 401 transitions. [2022-07-14 16:00:21,136 INFO L374 stractBuchiCegarLoop]: Abstraction has 274 states and 401 transitions. [2022-07-14 16:00:21,136 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-14 16:00:21,136 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 274 states and 401 transitions. [2022-07-14 16:00:21,138 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-14 16:00:21,138 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-14 16:00:21,138 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-14 16:00:21,140 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [12, 10, 9, 7, 7, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2022-07-14 16:00:21,141 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-14 16:00:21,141 INFO L752 eck$LassoCheckResult]: Stem: 3005#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(14, 2);call #Ultimate.allocInit(12, 3); 3006#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet6#1, main_#t~ret7#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := main_#t~nondet6#1;havoc main_#t~nondet6#1; 3010#L29 assume !(main_~x~0#1 > 46); 3011#L32 call main_#t~ret7#1 := fibonacci(main_~x~0#1);< 3015#fibonacciENTRY ~n := #in~n; 3048#L17 assume !(~n < 1); 3046#L19 assume !(1 == ~n); 3038#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3047#L17 assume !(~n < 1); 3045#L19 assume !(1 == ~n); 3039#L22 call #t~ret4 := fibonacci(~n - 1);< 3041#fibonacciENTRY ~n := #in~n; 3049#L17 assume !(~n < 1); 3145#L19 assume 1 == ~n;#res := 1; 3144#fibonacciFINAL assume true; 3142#fibonacciEXIT >#34#return; 3135#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3137#fibonacciENTRY ~n := #in~n; 3143#L17 assume ~n < 1;#res := 0; 3138#fibonacciFINAL assume true; 3134#fibonacciEXIT >#36#return; 3133#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3132#fibonacciFINAL assume true; 3129#fibonacciEXIT >#34#return; 3077#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3079#fibonacciENTRY ~n := #in~n; 3127#L17 assume !(~n < 1); 3123#L19 assume 1 == ~n;#res := 1; 3026#fibonacciFINAL assume true; 3076#fibonacciEXIT >#36#return; 3072#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3064#fibonacciFINAL assume true; 3054#fibonacciEXIT >#34#return; 3053#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3056#fibonacciENTRY ~n := #in~n; 3128#L17 assume !(~n < 1); 3124#L19 assume !(1 == ~n); 3125#L22 call #t~ret4 := fibonacci(~n - 1);< 3238#fibonacciENTRY ~n := #in~n; 3185#L17 assume !(~n < 1); 3186#L19 assume 1 == ~n;#res := 1; 3239#fibonacciFINAL assume true; 3236#fibonacciEXIT >#34#return; 3068#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3071#fibonacciENTRY ~n := #in~n; 3130#L17 assume ~n < 1;#res := 0; 3081#fibonacciFINAL assume true; 3067#fibonacciEXIT >#36#return; 3070#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3063#fibonacciFINAL assume true; 3052#fibonacciEXIT >#36#return; 3040#L22-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 3043#fibonacciFINAL assume true; 3037#fibonacciEXIT >#34#return; 3025#L22-1 call #t~ret5 := fibonacci(~n - 2);< 3031#fibonacciENTRY ~n := #in~n; 3032#L17 assume !(~n < 1); 3023#L19 assume !(1 == ~n); 2996#L22 call #t~ret4 := fibonacci(~n - 1);< 3235#fibonacciENTRY ~n := #in~n; 2994#L17 assume !(~n < 1); 2997#L19 assume !(1 == ~n); 3206#L22 call #t~ret4 := fibonacci(~n - 1);< 3207#fibonacciENTRY [2022-07-14 16:00:21,141 INFO L754 eck$LassoCheckResult]: Loop: 3207#fibonacciENTRY ~n := #in~n; 3218#L17 assume !(~n < 1); 3215#L19 assume !(1 == ~n); 3205#L22 call #t~ret4 := fibonacci(~n - 1);< 3207#fibonacciENTRY [2022-07-14 16:00:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1489009265, now seen corresponding path program 4 times [2022-07-14 16:00:21,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:21,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073953358] [2022-07-14 16:00:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:21,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:21,168 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:21,193 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:21,194 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 2 times [2022-07-14 16:00:21,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:21,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869938315] [2022-07-14 16:00:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:21,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:21,196 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 16:00:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 16:00:21,197 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 16:00:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1238644268, now seen corresponding path program 5 times [2022-07-14 16:00:21,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 16:00:21,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676978373] [2022-07-14 16:00:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 16:00:21,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 16:00:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-14 16:00:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:00:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:00:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:00:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:00:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-14 16:00:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-14 16:00:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-14 16:00:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-14 16:00:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 110 proven. 115 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-14 16:00:21,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 16:00:21,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676978373] [2022-07-14 16:00:21,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676978373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 16:00:21,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951504312] [2022-07-14 16:00:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 16:00:21,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 16:00:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:21,390 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 16:00:21,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-14 16:00:21,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-14 16:00:21,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 16:00:21,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 16:00:21,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 115 proven. 109 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-14 16:00:21,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 16:00:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 115 proven. 121 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 16:00:21,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951504312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 16:00:21,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 16:00:21,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 16] total 21 [2022-07-14 16:00:21,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360179474] [2022-07-14 16:00:21,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 16:00:21,878 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:21,878 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:21,878 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:21,878 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:21,878 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-14 16:00:21,878 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:21,879 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:21,879 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:21,879 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration5_Loop [2022-07-14 16:00:21,879 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:21,879 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:21,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:21,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:21,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:21,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:21,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:21,903 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:21,904 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-14 16:00:21,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:21,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:21,910 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:21,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-07-14 16:00:21,912 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:21,912 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:21,935 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:21,935 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret4=0} Honda state: {fibonacci_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:21,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:21,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:21,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:21,959 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:21,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-07-14 16:00:21,962 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:21,962 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:21,987 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-14 16:00:21,987 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-14 16:00:22,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:22,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:22,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:22,020 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:22,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-07-14 16:00:22,035 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-14 16:00:22,035 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:22,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2022-07-14 16:00:22,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:22,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:22,058 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:22,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2022-07-14 16:00:22,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-14 16:00:22,060 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-14 16:00:22,085 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-14 16:00:22,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2022-07-14 16:00:22,088 INFO L210 LassoAnalysis]: Preferences: [2022-07-14 16:00:22,088 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-14 16:00:22,088 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-14 16:00:22,088 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-14 16:00:22,088 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-14 16:00:22,088 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:22,088 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-14 16:00:22,088 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-14 16:00:22,088 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration5_Loop [2022-07-14 16:00:22,088 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-14 16:00:22,088 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-14 16:00:22,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:22,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:22,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:22,098 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:22,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-14 16:00:22,121 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-14 16:00:22,121 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-14 16:00:22,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:22,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:22,123 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:22,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2022-07-14 16:00:22,134 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:22,142 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:22,143 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:22,143 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:22,143 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:22,143 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:22,143 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:22,144 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:22,155 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:22,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2022-07-14 16:00:22,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:22,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:22,172 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:22,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2022-07-14 16:00:22,175 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:22,180 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:22,181 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:22,181 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:22,181 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:22,181 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:22,181 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:22,181 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:22,207 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-14 16:00:22,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2022-07-14 16:00:22,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:22,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:22,225 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:22,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2022-07-14 16:00:22,227 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-14 16:00:22,233 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-14 16:00:22,233 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-14 16:00:22,233 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-14 16:00:22,233 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-14 16:00:22,233 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-14 16:00:22,234 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-14 16:00:22,234 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-14 16:00:22,235 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-14 16:00:22,236 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-14 16:00:22,237 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-14 16:00:22,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-14 16:00:22,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 16:00:22,238 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-14 16:00:22,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2022-07-14 16:00:22,240 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-14 16:00:22,240 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-14 16:00:22,240 INFO L513 LassoAnalysis]: Proved termination. [2022-07-14 16:00:22,240 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2022-07-14 16:00:22,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:22,256 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-14 16:00:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 16:00:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:22,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:22,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:22,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:22,747 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-07-14 16:00:22,747 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:00:22,785 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 296 states and 427 transitions. Complement of second has 13 states. [2022-07-14 16:00:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-14 16:00:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:00:22,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2022-07-14 16:00:22,786 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2022-07-14 16:00:22,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:22,787 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:00:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 16:00:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:23,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:23,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:23,193 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2022-07-14 16:00:23,193 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:00:23,229 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 296 states and 427 transitions. Complement of second has 13 states. [2022-07-14 16:00:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-14 16:00:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:00:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2022-07-14 16:00:23,230 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 72 letters. Loop has 4 letters. [2022-07-14 16:00:23,230 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:23,231 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-14 16:00:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 16:00:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 16:00:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 16:00:23,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 16:00:23,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 16:00:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 16:00:23,650 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-07-14 16:00:23,650 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:00:23,714 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 274 states and 401 transitions. cyclomatic complexity: 131. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 349 states and 484 transitions. Complement of second has 14 states. [2022-07-14 16:00:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-14 16:00:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 16:00:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2022-07-14 16:00:23,716 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 4 letters. [2022-07-14 16:00:23,716 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:23,716 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 76 letters. Loop has 4 letters. [2022-07-14 16:00:23,716 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:23,716 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 72 letters. Loop has 8 letters. [2022-07-14 16:00:23,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-14 16:00:23,717 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 484 transitions. [2022-07-14 16:00:23,720 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2022-07-14 16:00:23,723 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 288 states and 417 transitions. [2022-07-14 16:00:23,723 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 138 [2022-07-14 16:00:23,724 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 143 [2022-07-14 16:00:23,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 288 states and 417 transitions. [2022-07-14 16:00:23,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-14 16:00:23,724 INFO L369 hiAutomatonCegarLoop]: Abstraction has 288 states and 417 transitions. [2022-07-14 16:00:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states and 417 transitions. [2022-07-14 16:00:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 280. [2022-07-14 16:00:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 176 states have (on average 1.125) internal successors, (198), 179 states have internal predecessors, (198), 61 states have call successors, (73), 37 states have call predecessors, (73), 43 states have return successors, (138), 63 states have call predecessors, (138), 59 states have call successors, (138) [2022-07-14 16:00:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 409 transitions. [2022-07-14 16:00:23,734 INFO L392 hiAutomatonCegarLoop]: Abstraction has 280 states and 409 transitions. [2022-07-14 16:00:23,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 16:00:23,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 16:00:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2022-07-14 16:00:23,737 INFO L87 Difference]: Start difference. First operand 280 states and 409 transitions. Second operand has 21 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 15 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-14 16:00:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 16:00:23,911 INFO L93 Difference]: Finished difference Result 408 states and 601 transitions. [2022-07-14 16:00:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 16:00:23,912 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 408 states and 601 transitions. [2022-07-14 16:00:23,916 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-14 16:00:23,916 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 408 states to 0 states and 0 transitions. [2022-07-14 16:00:23,916 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-14 16:00:23,916 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-14 16:00:23,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-14 16:00:23,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-14 16:00:23,916 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:00:23,916 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:00:23,916 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 16:00:23,916 INFO L287 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-07-14 16:00:23,916 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-14 16:00:23,916 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-14 16:00:23,916 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-14 16:00:23,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 14.07 04:00:23 BoogieIcfgContainer [2022-07-14 16:00:23,922 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-14 16:00:23,922 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 16:00:23,922 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 16:00:23,923 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 16:00:23,923 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 04:00:14" (3/4) ... [2022-07-14 16:00:23,925 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-14 16:00:23,925 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 16:00:23,926 INFO L158 Benchmark]: Toolchain (without parser) took 9886.89ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 93.6MB in the beginning and 135.3MB in the end (delta: -41.6MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2022-07-14 16:00:23,926 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 83.9MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:00:23,927 INFO L158 Benchmark]: CACSL2BoogieTranslator took 139.56ms. Allocated memory is still 115.3MB. Free memory was 93.4MB in the beginning and 84.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 16:00:23,927 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.02ms. Allocated memory is still 115.3MB. Free memory was 84.1MB in the beginning and 82.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 16:00:23,927 INFO L158 Benchmark]: Boogie Preprocessor took 16.92ms. Allocated memory is still 115.3MB. Free memory was 82.6MB in the beginning and 82.0MB in the end (delta: 644.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:00:23,927 INFO L158 Benchmark]: RCFGBuilder took 226.61ms. Allocated memory is still 115.3MB. Free memory was 81.7MB in the beginning and 72.9MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 16:00:23,928 INFO L158 Benchmark]: BuchiAutomizer took 9472.34ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 72.9MB in the beginning and 135.3MB in the end (delta: -62.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:00:23,928 INFO L158 Benchmark]: Witness Printer took 3.20ms. Allocated memory is still 167.8MB. Free memory is still 135.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 16:00:23,929 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 83.9MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 139.56ms. Allocated memory is still 115.3MB. Free memory was 93.4MB in the beginning and 84.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.02ms. Allocated memory is still 115.3MB. Free memory was 84.1MB in the beginning and 82.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.92ms. Allocated memory is still 115.3MB. Free memory was 82.6MB in the beginning and 82.0MB in the end (delta: 644.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 226.61ms. Allocated memory is still 115.3MB. Free memory was 81.7MB in the beginning and 72.9MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 9472.34ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 72.9MB in the beginning and 135.3MB in the end (delta: -62.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.20ms. Allocated memory is still 167.8MB. Free memory is still 135.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (4 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 4 modules have a trivial ranking function, the largest among these consists of 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 9.4s and 6 iterations. TraceHistogramMax:12. Analysis of lassos took 5.1s. Construction of modules took 0.4s. Büchi inclusion checks took 3.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 151 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 471 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 442 mSDsluCounter, 379 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 223 mSDsCounter, 318 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 716 IncrementalHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 318 mSolverCounterUnsat, 156 mSDtfsCounter, 716 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT3 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax100 hnf100 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq179 hnf94 smp69 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 13ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.7s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-14 16:00:23,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:24,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-14 16:00:24,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-14 16:00:24,565 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