./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b4d53423478efbe88c69a2c2de1bb984f61e7e586fd7bb6761452f26ace425f7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 14:12:22,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 14:12:22,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 14:12:22,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 14:12:22,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 14:12:22,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 14:12:22,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 14:12:22,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 14:12:22,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 14:12:22,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 14:12:22,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 14:12:22,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 14:12:22,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 14:12:22,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 14:12:22,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 14:12:22,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 14:12:22,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 14:12:22,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 14:12:22,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 14:12:22,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 14:12:22,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 14:12:22,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 14:12:22,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 14:12:22,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 14:12:22,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 14:12:22,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 14:12:22,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 14:12:22,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 14:12:22,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 14:12:22,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 14:12:22,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 14:12:22,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 14:12:22,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 14:12:22,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 14:12:22,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 14:12:22,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 14:12:22,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 14:12:22,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 14:12:22,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 14:12:22,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 14:12:22,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 14:12:22,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-02-15 14:12:22,370 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 14:12:22,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 14:12:22,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 14:12:22,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 14:12:22,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 14:12:22,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 14:12:22,372 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 14:12:22,372 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-02-15 14:12:22,373 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-02-15 14:12:22,373 INFO L138 SettingsManager]: * Use old map elimination=false [2023-02-15 14:12:22,373 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2023-02-15 14:12:22,374 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2023-02-15 14:12:22,374 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-02-15 14:12:22,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 14:12:22,374 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 14:12:22,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 14:12:22,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 14:12:22,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-02-15 14:12:22,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-02-15 14:12:22,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-02-15 14:12:22,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 14:12:22,375 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-02-15 14:12:22,375 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 14:12:22,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-02-15 14:12:22,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 14:12:22,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 14:12:22,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 14:12:22,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 14:12:22,378 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-02-15 14:12:22,378 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4d53423478efbe88c69a2c2de1bb984f61e7e586fd7bb6761452f26ace425f7 [2023-02-15 14:12:22,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 14:12:22,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 14:12:22,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 14:12:22,603 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 14:12:22,604 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 14:12:22,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2023-02-15 14:12:23,609 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 14:12:23,745 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 14:12:23,745 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2023-02-15 14:12:23,749 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbfbc32b/f6fab2a5781c4b8f828097e5dccb59d8/FLAGe147b932e [2023-02-15 14:12:23,758 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbfbc32b/f6fab2a5781c4b8f828097e5dccb59d8 [2023-02-15 14:12:23,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 14:12:23,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 14:12:23,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 14:12:23,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 14:12:23,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 14:12:23,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ebbdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23, skipping insertion in model container [2023-02-15 14:12:23,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 14:12:23,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 14:12:23,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 14:12:23,874 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 14:12:23,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 14:12:23,889 INFO L208 MainTranslator]: Completed translation [2023-02-15 14:12:23,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23 WrapperNode [2023-02-15 14:12:23,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 14:12:23,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 14:12:23,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 14:12:23,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 14:12:23,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,914 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2023-02-15 14:12:23,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 14:12:23,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 14:12:23,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 14:12:23,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 14:12:23,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 14:12:23,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 14:12:23,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 14:12:23,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 14:12:23,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (1/1) ... [2023-02-15 14:12:23,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:23,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:23,952 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) [2023-02-15 14:12:23,955 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 [2023-02-15 14:12:23,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 14:12:23,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 14:12:23,984 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2023-02-15 14:12:23,984 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2023-02-15 14:12:24,018 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 14:12:24,019 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 14:12:24,073 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 14:12:24,077 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 14:12:24,078 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 14:12:24,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:12:24 BoogieIcfgContainer [2023-02-15 14:12:24,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 14:12:24,080 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-02-15 14:12:24,080 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2023-02-15 14:12:24,082 INFO L275 PluginConnector]: BuchiAutomizer initialized [2023-02-15 14:12:24,082 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:12:24,082 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.02 02:12:23" (1/3) ... [2023-02-15 14:12:24,083 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3f7e621f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:12:24, skipping insertion in model container [2023-02-15 14:12:24,083 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:12:24,083 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:23" (2/3) ... [2023-02-15 14:12:24,084 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3f7e621f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:12:24, skipping insertion in model container [2023-02-15 14:12:24,091 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:12:24,091 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:12:24" (3/3) ... [2023-02-15 14:12:24,093 INFO L332 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion.c [2023-02-15 14:12:24,126 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-02-15 14:12:24,126 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-02-15 14:12:24,126 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-02-15 14:12:24,126 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-02-15 14:12:24,126 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-02-15 14:12:24,126 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-02-15 14:12:24,127 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-02-15 14:12:24,127 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-02-15 14:12:24,129 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2023-02-15 14:12:24,145 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-15 14:12:24,145 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:24,146 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:24,149 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-02-15 14:12:24,149 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 14:12:24,149 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-02-15 14:12:24,150 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2023-02-15 14:12:24,151 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-15 14:12:24,151 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:24,151 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:24,151 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-02-15 14:12:24,151 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 14:12:24,156 INFO L748 eck$LassoCheckResult]: Stem: 12#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 5#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 2#L16true call main_#t~ret3#1 := mc91(main_~x~0#1);< 11#$Ultimate##0true [2023-02-15 14:12:24,156 INFO L750 eck$LassoCheckResult]: Loop: 11#$Ultimate##0true ~n := #in~n; 8#L10true assume !(~n > 100); 9#L11true call #t~ret0 := mc91(11 + ~n);< 11#$Ultimate##0true [2023-02-15 14:12:24,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash 29870, now seen corresponding path program 1 times [2023-02-15 14:12:24,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:24,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034572933] [2023-02-15 14:12:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:24,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,218 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:24,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:24,239 INFO L85 PathProgramCache]: Analyzing trace with hash 37870, now seen corresponding path program 1 times [2023-02-15 14:12:24,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:24,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230485719] [2023-02-15 14:12:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:24,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,260 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash 889865249, now seen corresponding path program 1 times [2023-02-15 14:12:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:24,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670334793] [2023-02-15 14:12:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:24,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,278 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:24,365 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:24,365 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:24,365 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:24,366 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:24,366 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:12:24,366 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:24,366 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:24,366 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:24,366 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2023-02-15 14:12:24,366 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:24,367 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:24,375 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,385 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,387 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,389 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,392 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,442 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:24,448 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:12:24,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:24,463 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) [2023-02-15 14:12:24,464 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 [2023-02-15 14:12:24,465 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:24,465 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:24,492 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 [2023-02-15 14:12:24,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:24,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:24,494 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) [2023-02-15 14:12:24,499 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 [2023-02-15 14:12:24,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:12:24,500 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:24,527 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 14:12:24,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2023-02-15 14:12:24,543 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:24,543 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:24,543 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:24,543 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:24,543 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:12:24,543 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:24,544 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:24,544 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:24,544 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2023-02-15 14:12:24,544 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:24,544 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:24,545 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,558 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,561 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,564 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,567 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:24,613 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:24,616 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:12:24,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:24,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:24,624 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) [2023-02-15 14:12:24,626 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 [2023-02-15 14:12:24,633 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 [2023-02-15 14:12:24,644 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:24,644 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:24,644 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:24,644 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:24,645 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:24,646 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:24,646 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:24,656 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:12:24,660 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-15 14:12:24,660 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 14:12:24,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:24,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:24,703 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) [2023-02-15 14:12:24,707 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 [2023-02-15 14:12:24,708 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:12:24,708 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:12:24,709 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:12:24,709 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2023-02-15 14:12:24,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2023-02-15 14:12:24,715 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:12:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 14:12:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:24,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:12:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:24,839 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-02-15 14:12:24,840 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-02-15 14:12:24,899 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 32 states and 39 transitions. Complement of second has 12 states. [2023-02-15 14:12:24,901 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 [2023-02-15 14:12:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-02-15 14:12:24,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2023-02-15 14:12:24,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2023-02-15 14:12:24,906 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:24,906 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2023-02-15 14:12:24,906 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:24,906 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2023-02-15 14:12:24,906 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:24,907 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2023-02-15 14:12:24,909 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-15 14:12:24,912 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 19 states and 25 transitions. [2023-02-15 14:12:24,913 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2023-02-15 14:12:24,913 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2023-02-15 14:12:24,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2023-02-15 14:12:24,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:24,914 INFO L218 hiAutomatonCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-15 14:12:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2023-02-15 14:12:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-02-15 14:12:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2023-02-15 14:12:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-02-15 14:12:24,931 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-02-15 14:12:24,931 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-02-15 14:12:24,931 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-02-15 14:12:24,931 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2023-02-15 14:12:24,932 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-15 14:12:24,932 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:24,932 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:24,933 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 14:12:24,933 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-15 14:12:24,933 INFO L748 eck$LassoCheckResult]: Stem: 109#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 110#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 102#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 104#$Ultimate##0 ~n := #in~n; 107#L10 assume !(~n > 100); 101#L11 call #t~ret0 := mc91(11 + ~n);< 103#$Ultimate##0 ~n := #in~n; 108#L10 assume ~n > 100;#res := ~n - 10; 105#mc91FINAL assume true; 106#mc91EXIT >#20#return; 99#L11-1 [2023-02-15 14:12:24,934 INFO L750 eck$LassoCheckResult]: Loop: 99#L11-1 call #t~ret1 := mc91(#t~ret0);< 100#$Ultimate##0 ~n := #in~n; 113#L10 assume !(~n > 100); 98#L11 call #t~ret0 := mc91(11 + ~n);< 100#$Ultimate##0 ~n := #in~n; 113#L10 assume ~n > 100;#res := ~n - 10; 112#mc91FINAL assume true; 114#mc91EXIT >#20#return; 99#L11-1 [2023-02-15 14:12:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1612519912, now seen corresponding path program 1 times [2023-02-15 14:12:24,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:24,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697969584] [2023-02-15 14:12:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:24,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,940 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash -696734814, now seen corresponding path program 1 times [2023-02-15 14:12:24,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:24,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78786298] [2023-02-15 14:12:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:24,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,950 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,954 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:24,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1110240905, now seen corresponding path program 1 times [2023-02-15 14:12:24,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:24,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716793712] [2023-02-15 14:12:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:24,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,965 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:24,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:25,097 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:25,097 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:25,097 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:25,097 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:25,098 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:12:25,098 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:25,098 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:25,098 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:25,098 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2023-02-15 14:12:25,098 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:25,099 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:25,099 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:25,103 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:25,112 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:25,156 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:25,157 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:12:25,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:25,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:25,158 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) [2023-02-15 14:12:25,205 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 [2023-02-15 14:12:25,205 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:25,206 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:25,221 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:25,221 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 14:12:25,239 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 [2023-02-15 14:12:25,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:25,240 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) [2023-02-15 14:12:25,257 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 [2023-02-15 14:12:25,257 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:25,258 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:25,301 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 [2023-02-15 14:12:25,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:25,303 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) [2023-02-15 14:12:25,305 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 [2023-02-15 14:12:25,306 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:12:25,306 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:37,586 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2023-02-15 14:12:37,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2023-02-15 14:12:37,598 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:37,598 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:37,598 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:37,598 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:37,599 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:12:37,599 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:37,599 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:37,599 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:37,599 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2023-02-15 14:12:37,599 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:37,599 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:37,600 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:37,602 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:37,611 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:37,663 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:37,663 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:12:37,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:37,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:37,678 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) [2023-02-15 14:12:37,706 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 [2023-02-15 14:12:37,712 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:37,712 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:37,712 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:37,712 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:37,713 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:37,713 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:37,713 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:37,717 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 [2023-02-15 14:12:37,725 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:12:37,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2023-02-15 14:12:37,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:37,737 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) [2023-02-15 14:12:37,739 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 [2023-02-15 14:12:37,740 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 [2023-02-15 14:12:37,746 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:37,746 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:37,746 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:37,747 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:37,747 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:37,749 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:37,749 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:37,764 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:12:37,767 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-15 14:12:37,767 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 14:12:37,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:37,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:37,787 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) [2023-02-15 14:12:37,788 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 [2023-02-15 14:12:37,789 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:12:37,789 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:12:37,789 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:12:37,790 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2023-02-15 14:12:37,795 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 [2023-02-15 14:12:37,796 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:12:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:37,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 14:12:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:37,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 14:12:37,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:37,970 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 [2023-02-15 14:12:37,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:37,995 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2023-02-15 14:12:37,996 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 14:12:38,130 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 51 states and 73 transitions. Complement of second has 32 states. [2023-02-15 14:12:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-02-15 14:12:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 14:12:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2023-02-15 14:12:38,133 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 8 letters. [2023-02-15 14:12:38,133 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:38,133 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 18 letters. Loop has 8 letters. [2023-02-15 14:12:38,133 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:38,133 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 16 letters. [2023-02-15 14:12:38,134 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:38,134 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 73 transitions. [2023-02-15 14:12:38,136 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2023-02-15 14:12:38,138 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 42 states and 62 transitions. [2023-02-15 14:12:38,138 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2023-02-15 14:12:38,139 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2023-02-15 14:12:38,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 62 transitions. [2023-02-15 14:12:38,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:38,139 INFO L218 hiAutomatonCegarLoop]: Abstraction has 42 states and 62 transitions. [2023-02-15 14:12:38,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 62 transitions. [2023-02-15 14:12:38,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-02-15 14:12:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2023-02-15 14:12:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2023-02-15 14:12:38,143 INFO L240 hiAutomatonCegarLoop]: Abstraction has 36 states and 51 transitions. [2023-02-15 14:12:38,143 INFO L428 stractBuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2023-02-15 14:12:38,143 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-02-15 14:12:38,143 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 51 transitions. [2023-02-15 14:12:38,144 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2023-02-15 14:12:38,144 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:38,144 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:38,145 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 14:12:38,145 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 14:12:38,145 INFO L748 eck$LassoCheckResult]: Stem: 301#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 302#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 289#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 291#$Ultimate##0 ~n := #in~n; 310#L10 assume !(~n > 100); 288#L11 call #t~ret0 := mc91(11 + ~n);< 290#$Ultimate##0 ~n := #in~n; 300#L10 assume ~n > 100;#res := ~n - 10; 316#mc91FINAL assume true; 314#mc91EXIT >#20#return; 286#L11-1 call #t~ret1 := mc91(#t~ret0);< 309#$Ultimate##0 ~n := #in~n; 318#L10 assume !(~n > 100); 283#L11 [2023-02-15 14:12:38,145 INFO L750 eck$LassoCheckResult]: Loop: 283#L11 call #t~ret0 := mc91(11 + ~n);< 284#$Ultimate##0 ~n := #in~n; 297#L10 assume !(~n > 100); 283#L11 [2023-02-15 14:12:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -628486927, now seen corresponding path program 2 times [2023-02-15 14:12:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:38,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033109787] [2023-02-15 14:12:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:38,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:38,152 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:38,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:38,157 INFO L85 PathProgramCache]: Analyzing trace with hash 48310, now seen corresponding path program 2 times [2023-02-15 14:12:38,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:38,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542290425] [2023-02-15 14:12:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:38,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:38,160 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:38,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:38,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1491580474, now seen corresponding path program 3 times [2023-02-15 14:12:38,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:38,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889431623] [2023-02-15 14:12:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:38,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:38,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 14:12:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 14:12:38,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:12:38,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889431623] [2023-02-15 14:12:38,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889431623] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 14:12:38,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 14:12:38,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 14:12:38,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35527569] [2023-02-15 14:12:38,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 14:12:38,298 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:38,298 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:38,298 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:38,298 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:38,298 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:12:38,298 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:38,298 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:38,299 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:38,299 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2023-02-15 14:12:38,299 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:38,299 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:38,299 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:38,304 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:38,306 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:38,307 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:38,326 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:38,326 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:12:38,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:38,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:38,341 INFO L229 MonitoredProcess]: Starting monitored process 12 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) [2023-02-15 14:12:38,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-02-15 14:12:38,345 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:38,346 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:38,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:38,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:38,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:38,370 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) [2023-02-15 14:12:38,373 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 [2023-02-15 14:12:38,375 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:12:38,375 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:50,435 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2023-02-15 14:12:50,443 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 [2023-02-15 14:12:50,443 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:50,443 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:50,443 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:50,443 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:50,443 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:12:50,443 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:50,443 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:50,443 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:50,443 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2023-02-15 14:12:50,443 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:50,443 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:50,444 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:50,450 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:50,453 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:50,456 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:50,482 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:50,482 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:12:50,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:50,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:50,521 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) [2023-02-15 14:12:50,523 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 [2023-02-15 14:12:50,525 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 [2023-02-15 14:12:50,531 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:50,531 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:50,531 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:50,531 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:50,531 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:50,532 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:50,532 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:50,547 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:12:50,549 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-15 14:12:50,549 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 14:12:50,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:50,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:50,550 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) [2023-02-15 14:12:50,580 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:12:50,580 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:12:50,580 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:12:50,580 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2023-02-15 14:12:50,580 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 [2023-02-15 14:12:50,593 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 [2023-02-15 14:12:50,594 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:12:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:50,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 14:12:50,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:50,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:12:50,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:50,730 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 14:12:50,730 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:50,774 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 43 states and 59 transitions. Complement of second has 13 states. [2023-02-15 14:12:50,775 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 [2023-02-15 14:12:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2023-02-15 14:12:50,776 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2023-02-15 14:12:50,776 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:50,776 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:12:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 14:12:50,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:50,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:12:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:50,871 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 14:12:50,871 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:50,914 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 43 states and 59 transitions. Complement of second has 13 states. [2023-02-15 14:12:50,915 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 [2023-02-15 14:12:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2023-02-15 14:12:50,916 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2023-02-15 14:12:50,916 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:50,916 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:12:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 14:12:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:12:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:51,008 INFO L141 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 [2023-02-15 14:12:51,008 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:51,058 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 71 states and 100 transitions. Complement of second has 16 states. [2023-02-15 14:12:51,059 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 [2023-02-15 14:12:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 19 transitions. [2023-02-15 14:12:51,060 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2023-02-15 14:12:51,060 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:51,060 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2023-02-15 14:12:51,060 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:51,061 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2023-02-15 14:12:51,061 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:51,061 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 71 states and 100 transitions. [2023-02-15 14:12:51,063 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2023-02-15 14:12:51,064 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 71 states to 48 states and 74 transitions. [2023-02-15 14:12:51,065 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2023-02-15 14:12:51,065 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2023-02-15 14:12:51,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 74 transitions. [2023-02-15 14:12:51,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:51,065 INFO L218 hiAutomatonCegarLoop]: Abstraction has 48 states and 74 transitions. [2023-02-15 14:12:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 74 transitions. [2023-02-15 14:12:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-02-15 14:12:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2023-02-15 14:12:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2023-02-15 14:12:51,069 INFO L240 hiAutomatonCegarLoop]: Abstraction has 42 states and 60 transitions. [2023-02-15 14:12:51,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:12:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 14:12:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 14:12:51,072 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:12:51,137 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2023-02-15 14:12:51,137 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2023-02-15 14:12:51,138 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2023-02-15 14:12:51,140 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 58 states and 75 transitions. [2023-02-15 14:12:51,140 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2023-02-15 14:12:51,140 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2023-02-15 14:12:51,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 75 transitions. [2023-02-15 14:12:51,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:51,140 INFO L218 hiAutomatonCegarLoop]: Abstraction has 58 states and 75 transitions. [2023-02-15 14:12:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 75 transitions. [2023-02-15 14:12:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-02-15 14:12:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 37 states have internal predecessors, (37), 13 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) [2023-02-15 14:12:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-02-15 14:12:51,145 INFO L240 hiAutomatonCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-02-15 14:12:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 14:12:51,146 INFO L428 stractBuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-02-15 14:12:51,146 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-02-15 14:12:51,146 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57 states and 74 transitions. [2023-02-15 14:12:51,147 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2023-02-15 14:12:51,147 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:51,147 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:51,148 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-15 14:12:51,148 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2023-02-15 14:12:51,148 INFO L748 eck$LassoCheckResult]: Stem: 849#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 850#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 831#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 833#$Ultimate##0 ~n := #in~n; 856#L10 assume !(~n > 100); 830#L11 call #t~ret0 := mc91(11 + ~n);< 832#$Ultimate##0 ~n := #in~n; 865#L10 assume !(~n > 100); 861#L11 call #t~ret0 := mc91(11 + ~n);< 863#$Ultimate##0 ~n := #in~n; 866#L10 assume ~n > 100;#res := ~n - 10; 864#mc91FINAL assume true; 862#mc91EXIT >#20#return; 842#L11-1 call #t~ret1 := mc91(#t~ret0);< 841#$Ultimate##0 ~n := #in~n; 844#L10 assume ~n > 100;#res := ~n - 10; 855#mc91FINAL assume true; 881#mc91EXIT >#22#return; 857#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 879#mc91FINAL assume true; 878#mc91EXIT >#20#return; 836#L11-1 call #t~ret1 := mc91(#t~ret0);< 853#$Ultimate##0 [2023-02-15 14:12:51,149 INFO L750 eck$LassoCheckResult]: Loop: 853#$Ultimate##0 ~n := #in~n; 871#L10 assume !(~n > 100); 846#L11 call #t~ret0 := mc91(11 + ~n);< 845#$Ultimate##0 ~n := #in~n; 848#L10 assume !(~n > 100); 847#L11 call #t~ret0 := mc91(11 + ~n);< 867#$Ultimate##0 ~n := #in~n; 877#L10 assume ~n > 100;#res := ~n - 10; 875#mc91FINAL assume true; 873#mc91EXIT >#20#return; 827#L11-1 call #t~ret1 := mc91(#t~ret0);< 870#$Ultimate##0 ~n := #in~n; 868#L10 assume ~n > 100;#res := ~n - 10; 869#mc91FINAL assume true; 880#mc91EXIT >#22#return; 857#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 879#mc91FINAL assume true; 878#mc91EXIT >#20#return; 835#L11-1 call #t~ret1 := mc91(#t~ret0);< 853#$Ultimate##0 [2023-02-15 14:12:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1678623115, now seen corresponding path program 1 times [2023-02-15 14:12:51,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:51,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405556737] [2023-02-15 14:12:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:51,155 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:51,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:51,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2037590184, now seen corresponding path program 1 times [2023-02-15 14:12:51,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:51,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188855819] [2023-02-15 14:12:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:51,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:51,167 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:51,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1698366862, now seen corresponding path program 2 times [2023-02-15 14:12:51,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006894955] [2023-02-15 14:12:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:51,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:51,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 14:12:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:51,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 14:12:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:51,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 14:12:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:51,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 14:12:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:51,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 14:12:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 14:12:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 14:12:51,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:12:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006894955] [2023-02-15 14:12:51,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006894955] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 14:12:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356961495] [2023-02-15 14:12:51,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 14:12:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 14:12:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:51,318 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 14:12:51,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 14:12:51,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 14:12:51,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 14:12:51,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 14:12:51,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 14:12:51,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 14:12:51,440 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 [2023-02-15 14:12:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 14:12:51,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356961495] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 14:12:51,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 14:12:51,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2023-02-15 14:12:51,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615784476] [2023-02-15 14:12:51,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 14:12:51,681 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:51,681 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:51,681 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:51,681 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:51,681 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:12:51,681 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:51,681 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:51,681 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:51,681 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2023-02-15 14:12:51,682 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:51,682 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:51,682 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:51,686 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:51,687 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:51,688 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:51,689 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:51,707 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:51,707 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:12:51,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:51,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:51,721 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) [2023-02-15 14:12:51,724 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 [2023-02-15 14:12:51,726 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:51,726 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:51,756 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 [2023-02-15 14:12:51,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:51,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:51,773 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) [2023-02-15 14:12:51,789 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 [2023-02-15 14:12:51,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:12:51,790 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:52,039 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 14:12:52,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:52,044 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:52,044 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:52,044 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:52,044 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:52,044 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:12:52,044 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:52,044 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:52,045 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:52,045 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2023-02-15 14:12:52,045 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:52,045 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:52,045 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:52,064 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:52,065 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:52,067 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:52,068 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:52,084 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:52,084 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:12:52,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:52,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:52,094 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) [2023-02-15 14:12:52,111 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 [2023-02-15 14:12:52,111 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 [2023-02-15 14:12:52,117 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:52,117 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:52,117 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:52,117 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:52,117 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:52,119 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:52,119 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:52,121 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:12:52,122 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-15 14:12:52,122 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 14:12:52,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:52,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:52,123 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:52,130 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:12:52,130 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:12:52,130 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:12:52,130 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2023-02-15 14:12:52,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-02-15 14:12:52,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2023-02-15 14:12:52,134 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:12:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:52,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 14:12:52,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:52,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 14:12:52,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 14:12:52,379 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2023-02-15 14:12:52,379 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 14:12:52,598 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Result 125 states and 150 transitions. Complement of second has 37 states. [2023-02-15 14:12:52,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2023-02-15 14:12:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 14:12:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 34 transitions. [2023-02-15 14:12:52,600 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2023-02-15 14:12:52,600 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:52,600 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:12:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:52,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 14:12:52,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:52,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 14:12:52,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 14:12:52,856 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2023-02-15 14:12:52,856 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 14:12:53,055 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Result 125 states and 150 transitions. Complement of second has 37 states. [2023-02-15 14:12:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2023-02-15 14:12:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 14:12:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 34 transitions. [2023-02-15 14:12:53,056 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2023-02-15 14:12:53,056 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:53,056 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:12:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:53,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 14:12:53,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:53,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:53,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 14:12:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 14:12:53,347 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2023-02-15 14:12:53,347 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 14:12:53,843 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Result 431 states and 531 transitions. Complement of second has 216 states. [2023-02-15 14:12:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 20 states 2 stem states 17 non-accepting loop states 1 accepting loop states [2023-02-15 14:12:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 14:12:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 49 transitions. [2023-02-15 14:12:53,844 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 49 transitions. Stem has 22 letters. Loop has 19 letters. [2023-02-15 14:12:53,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:53,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 49 transitions. Stem has 41 letters. Loop has 19 letters. [2023-02-15 14:12:53,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:53,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 49 transitions. Stem has 22 letters. Loop has 38 letters. [2023-02-15 14:12:53,846 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:53,846 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 431 states and 531 transitions. [2023-02-15 14:12:53,851 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 29 [2023-02-15 14:12:53,854 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 431 states to 203 states and 269 transitions. [2023-02-15 14:12:53,854 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 95 [2023-02-15 14:12:53,855 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2023-02-15 14:12:53,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 203 states and 269 transitions. [2023-02-15 14:12:53,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:53,855 INFO L218 hiAutomatonCegarLoop]: Abstraction has 203 states and 269 transitions. [2023-02-15 14:12:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states and 269 transitions. [2023-02-15 14:12:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 157. [2023-02-15 14:12:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 97 states have (on average 1.092783505154639) internal successors, (106), 99 states have internal predecessors, (106), 35 states have call successors, (45), 29 states have call predecessors, (45), 25 states have return successors, (47), 28 states have call predecessors, (47), 32 states have call successors, (47) [2023-02-15 14:12:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2023-02-15 14:12:53,865 INFO L240 hiAutomatonCegarLoop]: Abstraction has 157 states and 198 transitions. [2023-02-15 14:12:53,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:12:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 14:12:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-02-15 14:12:53,866 INFO L87 Difference]: Start difference. First operand 157 states and 198 transitions. Second operand has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2023-02-15 14:12:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:12:54,026 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2023-02-15 14:12:54,026 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 188 transitions. [2023-02-15 14:12:54,027 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2023-02-15 14:12:54,029 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 104 states and 123 transitions. [2023-02-15 14:12:54,029 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2023-02-15 14:12:54,029 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2023-02-15 14:12:54,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 123 transitions. [2023-02-15 14:12:54,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:54,029 INFO L218 hiAutomatonCegarLoop]: Abstraction has 104 states and 123 transitions. [2023-02-15 14:12:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 123 transitions. [2023-02-15 14:12:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2023-02-15 14:12:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 21 states have call successors, (28), 20 states have call predecessors, (28), 16 states have return successors, (25), 15 states have call predecessors, (25), 18 states have call successors, (25) [2023-02-15 14:12:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2023-02-15 14:12:54,034 INFO L240 hiAutomatonCegarLoop]: Abstraction has 100 states and 119 transitions. [2023-02-15 14:12:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 14:12:54,037 INFO L428 stractBuchiCegarLoop]: Abstraction has 100 states and 119 transitions. [2023-02-15 14:12:54,037 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-02-15 14:12:54,037 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 100 states and 119 transitions. [2023-02-15 14:12:54,038 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2023-02-15 14:12:54,038 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:54,038 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:54,043 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2023-02-15 14:12:54,044 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-15 14:12:54,044 INFO L748 eck$LassoCheckResult]: Stem: 2992#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 2993#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 2977#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 2978#$Ultimate##0 ~n := #in~n; 3003#L10 assume !(~n > 100); 2989#L11 call #t~ret0 := mc91(11 + ~n);< 2988#$Ultimate##0 ~n := #in~n; 2991#L10 assume !(~n > 100); 2990#L11 call #t~ret0 := mc91(11 + ~n);< 3027#$Ultimate##0 ~n := #in~n; 3030#L10 assume ~n > 100;#res := ~n - 10; 3028#mc91FINAL assume true; 3026#mc91EXIT >#20#return; 3023#L11-1 call #t~ret1 := mc91(#t~ret0);< 3025#$Ultimate##0 ~n := #in~n; 3032#L10 assume ~n > 100;#res := ~n - 10; 3031#mc91FINAL assume true; 3022#mc91EXIT >#22#return; 3020#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 3019#mc91FINAL assume true; 3018#mc91EXIT >#20#return; 3013#L11-1 call #t~ret1 := mc91(#t~ret0);< 3017#$Ultimate##0 ~n := #in~n; 3015#L10 assume !(~n > 100); 2974#L11 call #t~ret0 := mc91(11 + ~n);< 2975#$Ultimate##0 ~n := #in~n; 3029#L10 assume !(~n > 100); 2973#L11 call #t~ret0 := mc91(11 + ~n);< 2976#$Ultimate##0 ~n := #in~n; 3067#L10 assume ~n > 100;#res := ~n - 10; 3065#mc91FINAL assume true; 3004#mc91EXIT >#20#return; 2971#L11-1 [2023-02-15 14:12:54,044 INFO L750 eck$LassoCheckResult]: Loop: 2971#L11-1 call #t~ret1 := mc91(#t~ret0);< 3000#$Ultimate##0 ~n := #in~n; 3011#L10 assume !(~n > 100); 2970#L11 call #t~ret0 := mc91(11 + ~n);< 2972#$Ultimate##0 ~n := #in~n; 3068#L10 assume ~n > 100;#res := ~n - 10; 3066#mc91FINAL assume true; 3064#mc91EXIT >#20#return; 2971#L11-1 [2023-02-15 14:12:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1028640846, now seen corresponding path program 3 times [2023-02-15 14:12:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:54,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438867018] [2023-02-15 14:12:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:54,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 14:12:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:54,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 14:12:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:54,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 14:12:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:54,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 14:12:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 14:12:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:12:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438867018] [2023-02-15 14:12:54,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438867018] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 14:12:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364107018] [2023-02-15 14:12:54,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 14:12:54,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 14:12:54,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:54,145 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 14:12:54,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 14:12:54,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 14:12:54,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 14:12:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 14:12:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 14:12:54,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 14:12:54,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364107018] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 14:12:54,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 14:12:54,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2023-02-15 14:12:54,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151759595] [2023-02-15 14:12:54,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 14:12:54,187 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-02-15 14:12:54,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:54,188 INFO L85 PathProgramCache]: Analyzing trace with hash -696734814, now seen corresponding path program 2 times [2023-02-15 14:12:54,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:54,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521095505] [2023-02-15 14:12:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:54,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:54,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:54,285 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:54,285 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:54,285 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:54,285 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:54,286 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:12:54,286 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:54,286 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:54,286 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:54,286 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2023-02-15 14:12:54,286 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:54,286 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:54,287 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:54,293 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:54,294 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:54,330 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:54,330 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:12:54,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:54,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:54,340 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) [2023-02-15 14:12:54,342 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 [2023-02-15 14:12:54,344 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:54,345 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:54,362 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 [2023-02-15 14:12:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:54,365 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) [2023-02-15 14:12:54,368 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 [2023-02-15 14:12:54,369 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:12:54,369 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:13:06,640 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2023-02-15 14:13:06,652 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 [2023-02-15 14:13:06,652 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:13:06,653 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:13:06,653 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:13:06,653 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:13:06,653 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:13:06,653 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:13:06,653 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:13:06,653 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:13:06,653 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2023-02-15 14:13:06,653 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:13:06,653 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:13:06,654 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:13:06,659 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:13:06,661 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:13:06,696 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:13:06,697 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:13:06,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:13:06,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:13:06,698 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) [2023-02-15 14:13:06,700 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 [2023-02-15 14:13:06,704 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 [2023-02-15 14:13:06,710 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:13:06,710 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:13:06,710 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:13:06,710 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:13:06,710 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:13:06,711 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:13:06,711 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:13:06,726 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:13:06,731 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 [2023-02-15 14:13:06,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:13:06,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:13:06,732 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:13:06,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-02-15 14:13:06,735 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 [2023-02-15 14:13:06,740 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:13:06,741 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:13:06,741 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:13:06,741 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:13:06,741 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:13:06,741 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:13:06,741 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:13:06,756 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:13:06,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-02-15 14:13:06,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:13:06,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:13:06,762 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) [2023-02-15 14:13:06,763 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 [2023-02-15 14:13:06,767 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 [2023-02-15 14:13:06,773 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:13:06,773 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:13:06,773 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:13:06,773 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:13:06,773 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:13:06,775 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:13:06,775 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:13:06,777 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:13:06,783 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-15 14:13:06,783 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 14:13:06,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:13:06,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:13:06,785 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) [2023-02-15 14:13:06,786 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 [2023-02-15 14:13:06,787 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:13:06,787 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:13:06,787 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:13:06,787 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2023-02-15 14:13:06,790 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 [2023-02-15 14:13:06,790 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:13:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:13:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:13:06,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 14:13:06,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:13:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:13:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 14:13:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:13:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:13:07,004 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2023-02-15 14:13:07,004 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 14:13:07,112 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 139 states and 161 transitions. Complement of second has 24 states. [2023-02-15 14:13:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-02-15 14:13:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 14:13:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2023-02-15 14:13:07,113 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 32 letters. Loop has 8 letters. [2023-02-15 14:13:07,113 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:13:07,113 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:13:07,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:13:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:13:07,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 14:13:07,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:13:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:13:07,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 14:13:07,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:13:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:13:07,316 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2023-02-15 14:13:07,316 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 14:13:07,420 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 139 states and 161 transitions. Complement of second has 24 states. [2023-02-15 14:13:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-02-15 14:13:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 14:13:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2023-02-15 14:13:07,422 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 32 letters. Loop has 8 letters. [2023-02-15 14:13:07,422 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:13:07,422 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:13:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:13:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:13:07,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 14:13:07,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:13:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:13:07,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 14:13:07,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:13:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:13:07,623 INFO L141 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 [2023-02-15 14:13:07,623 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 14:13:07,732 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 100 states and 119 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 181 states and 211 transitions. Complement of second has 27 states. [2023-02-15 14:13:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2023-02-15 14:13:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 14:13:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 21 transitions. [2023-02-15 14:13:07,734 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 32 letters. Loop has 8 letters. [2023-02-15 14:13:07,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:13:07,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 40 letters. Loop has 8 letters. [2023-02-15 14:13:07,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:13:07,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 32 letters. Loop has 16 letters. [2023-02-15 14:13:07,736 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:13:07,736 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 181 states and 211 transitions. [2023-02-15 14:13:07,737 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-02-15 14:13:07,737 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 181 states to 0 states and 0 transitions. [2023-02-15 14:13:07,737 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-02-15 14:13:07,737 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-02-15 14:13:07,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-02-15 14:13:07,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-15 14:13:07,738 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 14:13:07,738 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 14:13:07,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:13:07,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 14:13:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 14:13:07,739 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 5 states have internal predecessors, (16), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 14:13:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:13:07,739 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2023-02-15 14:13:07,739 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2023-02-15 14:13:07,739 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-02-15 14:13:07,739 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2023-02-15 14:13:07,739 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-02-15 14:13:07,739 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-02-15 14:13:07,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-02-15 14:13:07,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-15 14:13:07,740 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 14:13:07,740 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 14:13:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 14:13:07,740 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 14:13:07,740 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-02-15 14:13:07,740 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-02-15 14:13:07,740 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-02-15 14:13:07,740 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-02-15 14:13:07,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.02 02:13:07 BoogieIcfgContainer [2023-02-15 14:13:07,745 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-02-15 14:13:07,746 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 14:13:07,746 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 14:13:07,746 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 14:13:07,746 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:12:24" (3/4) ... [2023-02-15 14:13:07,748 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-15 14:13:07,748 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 14:13:07,748 INFO L158 Benchmark]: Toolchain (without parser) took 43987.23ms. Allocated memory was 146.8MB in the beginning and 247.5MB in the end (delta: 100.7MB). Free memory was 94.9MB in the beginning and 78.1MB in the end (delta: 16.8MB). Peak memory consumption was 119.3MB. Max. memory is 16.1GB. [2023-02-15 14:13:07,748 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 146.8MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:13:07,749 INFO L158 Benchmark]: CACSL2BoogieTranslator took 128.62ms. Allocated memory is still 146.8MB. Free memory was 94.5MB in the beginning and 86.1MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 14:13:07,749 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.82ms. Allocated memory is still 146.8MB. Free memory was 85.7MB in the beginning and 84.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 14:13:07,749 INFO L158 Benchmark]: Boogie Preprocessor took 10.64ms. Allocated memory is still 146.8MB. Free memory was 84.4MB in the beginning and 83.6MB in the end (delta: 861.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:13:07,749 INFO L158 Benchmark]: RCFGBuilder took 151.96ms. Allocated memory is still 146.8MB. Free memory was 83.6MB in the beginning and 75.2MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 14:13:07,750 INFO L158 Benchmark]: BuchiAutomizer took 43665.78ms. Allocated memory was 146.8MB in the beginning and 247.5MB in the end (delta: 100.7MB). Free memory was 74.8MB in the beginning and 78.1MB in the end (delta: -3.3MB). Peak memory consumption was 100.4MB. Max. memory is 16.1GB. [2023-02-15 14:13:07,750 INFO L158 Benchmark]: Witness Printer took 2.29ms. Allocated memory is still 247.5MB. Free memory is still 78.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:13:07,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 146.8MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 128.62ms. Allocated memory is still 146.8MB. Free memory was 94.5MB in the beginning and 86.1MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.82ms. Allocated memory is still 146.8MB. Free memory was 85.7MB in the beginning and 84.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.64ms. Allocated memory is still 146.8MB. Free memory was 84.4MB in the beginning and 83.6MB in the end (delta: 861.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 151.96ms. Allocated memory is still 146.8MB. Free memory was 83.6MB in the beginning and 75.2MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 43665.78ms. Allocated memory was 146.8MB in the beginning and 247.5MB in the end (delta: 100.7MB). Free memory was 74.8MB in the beginning and 78.1MB in the end (delta: -3.3MB). Peak memory consumption was 100.4MB. Max. memory is 16.1GB. * Witness Printer took 2.29ms. Allocated memory is still 247.5MB. Free memory is still 78.1MB. 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 (3 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function 211 + -2 * \old(n) and consists of 4 locations. One deterministic module has affine ranking function 201 + -2 * aux-mc91(n+11)-aux and consists of 8 locations. One nondeterministic module has affine ranking function -2 * n + 189 and consists of 6 locations. One nondeterministic module has affine ranking function 90 + -1 * \old(n) and consists of 20 locations. One nondeterministic module has affine ranking function 201 + -2 * aux-mc91(n+11)-aux and consists of 8 locations. 3 modules have a trivial ranking function, the largest among these consists of 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 43.6s and 6 iterations. TraceHistogramMax:7. Analysis of lassos took 39.6s. Construction of modules took 0.4s. Büchi inclusion checks took 3.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 65 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, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 12/24 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 300 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 285 mSDsluCounter, 362 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 196 mSDsCounter, 214 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 819 IncrementalHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 214 mSolverCounterUnsat, 166 mSDtfsCounter, 819 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq161 hnf100 smp100 dnf92 smp100 tf109 neg95 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 91ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 3 LassoNonterminationAnalysisTime: 37.2s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-02-15 14:13:07,757 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 [2023-02-15 14:13:07,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 14:13:08,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 14:13:08,366 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