./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 26d01a9c 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/NestedRecursion_2b.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 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 08:53:37,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 08:53:37,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 08:53:37,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 08:53:37,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 08:53:37,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 08:53:37,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 08:53:37,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 08:53:37,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 08:53:37,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 08:53:37,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 08:53:37,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 08:53:37,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 08:53:37,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 08:53:37,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 08:53:37,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 08:53:37,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 08:53:37,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 08:53:37,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 08:53:37,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 08:53:37,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 08:53:37,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 08:53:37,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 08:53:37,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 08:53:37,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 08:53:37,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 08:53:37,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 08:53:37,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 08:53:37,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 08:53:37,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 08:53:37,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 08:53:37,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 08:53:37,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 08:53:37,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 08:53:37,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 08:53:37,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 08:53:37,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 08:53:37,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 08:53:37,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 08:53:37,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 08:53:37,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 08:53:37,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-02-18 08:53:37,786 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 08:53:37,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 08:53:37,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 08:53:37,787 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 08:53:37,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 08:53:37,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 08:53:37,788 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 08:53:37,789 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-02-18 08:53:37,789 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-02-18 08:53:37,789 INFO L138 SettingsManager]: * Use old map elimination=false [2023-02-18 08:53:37,790 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2023-02-18 08:53:37,790 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2023-02-18 08:53:37,790 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-02-18 08:53:37,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 08:53:37,790 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 08:53:37,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 08:53:37,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 08:53:37,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-02-18 08:53:37,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-02-18 08:53:37,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-02-18 08:53:37,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 08:53:37,792 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-02-18 08:53:37,792 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 08:53:37,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-02-18 08:53:37,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 08:53:37,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 08:53:37,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 08:53:37,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 08:53:37,794 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-02-18 08:53:37,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2023-02-18 08:53:38,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 08:53:38,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 08:53:38,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 08:53:38,075 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 08:53:38,076 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 08:53:38,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2023-02-18 08:53:39,275 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 08:53:39,422 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 08:53:39,423 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2023-02-18 08:53:39,428 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cacba91d/1630cff796484560a34ed72fae44030e/FLAGc947c9f15 [2023-02-18 08:53:39,442 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cacba91d/1630cff796484560a34ed72fae44030e [2023-02-18 08:53:39,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 08:53:39,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 08:53:39,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 08:53:39,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 08:53:39,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 08:53:39,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a570294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39, skipping insertion in model container [2023-02-18 08:53:39,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 08:53:39,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 08:53:39,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 08:53:39,585 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 08:53:39,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 08:53:39,610 INFO L208 MainTranslator]: Completed translation [2023-02-18 08:53:39,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39 WrapperNode [2023-02-18 08:53:39,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 08:53:39,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 08:53:39,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 08:53:39,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 08:53:39,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,641 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 9 [2023-02-18 08:53:39,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 08:53:39,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 08:53:39,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 08:53:39,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 08:53:39,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,654 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 08:53:39,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 08:53:39,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 08:53:39,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 08:53:39,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (1/1) ... [2023-02-18 08:53:39,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:39,687 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) [2023-02-18 08:53:39,690 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 [2023-02-18 08:53:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-02-18 08:53:39,731 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-02-18 08:53:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 08:53:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 08:53:39,778 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 08:53:39,780 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 08:53:39,878 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 08:53:39,887 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 08:53:39,888 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-18 08:53:39,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:53:39 BoogieIcfgContainer [2023-02-18 08:53:39,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 08:53:39,891 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-02-18 08:53:39,892 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2023-02-18 08:53:39,897 INFO L275 PluginConnector]: BuchiAutomizer initialized [2023-02-18 08:53:39,898 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-18 08:53:39,898 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.02 08:53:39" (1/3) ... [2023-02-18 08:53:39,900 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2110bedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.02 08:53:39, skipping insertion in model container [2023-02-18 08:53:39,900 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-18 08:53:39,900 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:53:39" (2/3) ... [2023-02-18 08:53:39,901 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2110bedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.02 08:53:39, skipping insertion in model container [2023-02-18 08:53:39,901 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-18 08:53:39,901 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:53:39" (3/3) ... [2023-02-18 08:53:39,903 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2023-02-18 08:53:39,987 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-02-18 08:53:39,987 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-02-18 08:53:39,987 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-02-18 08:53:39,987 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-02-18 08:53:39,987 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-02-18 08:53:39,988 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-02-18 08:53:39,988 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-02-18 08:53:39,988 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-02-18 08:53:39,994 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-02-18 08:53:40,014 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-18 08:53:40,014 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-18 08:53:40,014 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-18 08:53:40,019 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-02-18 08:53:40,020 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-18 08:53:40,020 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-02-18 08:53:40,020 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-02-18 08:53:40,023 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-18 08:53:40,023 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-18 08:53:40,024 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-18 08:53:40,024 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2023-02-18 08:53:40,024 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-18 08:53:40,033 INFO L748 eck$LassoCheckResult]: Stem: 10#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 5#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 11#L20true assume !(main_~x~0#1 < 0); 9#L21true call main_#t~ret3#1 := g(main_~x~0#1);< 12#$Ultimate##0true [2023-02-18 08:53:40,033 INFO L750 eck$LassoCheckResult]: Loop: 12#$Ultimate##0true ~x := #in~x; 6#L12true assume !(0 == ~x); 4#L15true call #t~ret0 := g(~x - 1);< 12#$Ultimate##0true [2023-02-18 08:53:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1202733, now seen corresponding path program 1 times [2023-02-18 08:53:40,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:40,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426436321] [2023-02-18 08:53:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:40,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:40,130 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:40,160 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:40,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:40,163 INFO L85 PathProgramCache]: Analyzing trace with hash 29937, now seen corresponding path program 1 times [2023-02-18 08:53:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:40,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839501470] [2023-02-18 08:53:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:40,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:40,170 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:40,175 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:40,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880581, now seen corresponding path program 1 times [2023-02-18 08:53:40,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:40,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28353501] [2023-02-18 08:53:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:40,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:40,189 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:40,195 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:40,232 INFO L210 LassoAnalysis]: Preferences: [2023-02-18 08:53:40,233 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-18 08:53:40,234 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-18 08:53:40,234 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-18 08:53:40,234 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-18 08:53:40,234 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,234 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-18 08:53:40,234 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-18 08:53:40,235 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2023-02-18 08:53:40,235 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-18 08:53:40,236 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-18 08:53:40,252 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,261 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,264 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,267 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,269 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,292 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-18 08:53:40,293 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-18 08:53:40,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,303 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) [2023-02-18 08:53:40,305 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 [2023-02-18 08:53:40,307 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,307 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,337 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,337 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2023-02-18 08:53:40,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,368 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) [2023-02-18 08:53:40,380 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,380 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,390 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 [2023-02-18 08:53:40,398 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,398 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:40,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,426 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) [2023-02-18 08:53:40,447 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,447 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,457 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 [2023-02-18 08:53:40,459 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,459 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,467 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 [2023-02-18 08:53:40,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,469 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) [2023-02-18 08:53:40,472 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 [2023-02-18 08:53:40,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,473 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,484 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,485 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,491 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 [2023-02-18 08:53:40,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,494 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) [2023-02-18 08:53:40,495 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 [2023-02-18 08:53:40,497 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,497 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,520 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 [2023-02-18 08:53:40,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,522 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) [2023-02-18 08:53:40,537 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 [2023-02-18 08:53:40,539 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-18 08:53:40,539 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,571 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,572 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-1} Honda state: {g_#in~x=-1} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=0}, {g_#in~x=-1}] Lambdas: [7, 9, 1] Nus: [1, 0] [2023-02-18 08:53:40,575 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 [2023-02-18 08:53:40,582 INFO L210 LassoAnalysis]: Preferences: [2023-02-18 08:53:40,583 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-18 08:53:40,583 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-18 08:53:40,583 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-18 08:53:40,583 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-18 08:53:40,583 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,583 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-18 08:53:40,583 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-18 08:53:40,583 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2023-02-18 08:53:40,583 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-18 08:53:40,584 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-18 08:53:40,585 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,589 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,590 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,601 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,602 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,603 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,605 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,607 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,608 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,616 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-18 08:53:40,616 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-18 08:53:40,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,618 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) [2023-02-18 08:53:40,620 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 [2023-02-18 08:53:40,622 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,622 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,633 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,633 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:40,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,641 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) [2023-02-18 08:53:40,643 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 [2023-02-18 08:53:40,644 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,644 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,661 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,661 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,664 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 [2023-02-18 08:53:40,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,666 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) [2023-02-18 08:53:40,668 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 [2023-02-18 08:53:40,669 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,670 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,677 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,678 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2023-02-18 08:53:40,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,684 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) [2023-02-18 08:53:40,686 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 [2023-02-18 08:53:40,688 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,688 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,695 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,695 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res#1=0} Honda state: {ULTIMATE.start_main_#res#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,700 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 [2023-02-18 08:53:40,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,702 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) [2023-02-18 08:53:40,704 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 [2023-02-18 08:53:40,706 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,706 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,714 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,714 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,720 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 [2023-02-18 08:53:40,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,722 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) [2023-02-18 08:53:40,723 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 [2023-02-18 08:53:40,725 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,725 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,737 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:40,737 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret3#1=0} Honda state: {ULTIMATE.start_main_#t~ret3#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:40,743 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 [2023-02-18 08:53:40,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,745 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) [2023-02-18 08:53:40,748 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 [2023-02-18 08:53:40,749 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:40,749 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,785 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 [2023-02-18 08:53:40,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,787 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) [2023-02-18 08:53:40,790 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 [2023-02-18 08:53:40,791 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-18 08:53:40,791 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:40,829 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-18 08:53:40,836 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 [2023-02-18 08:53:40,836 INFO L210 LassoAnalysis]: Preferences: [2023-02-18 08:53:40,837 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-18 08:53:40,837 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-18 08:53:40,837 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-18 08:53:40,837 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-18 08:53:40,837 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,837 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-18 08:53:40,837 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-18 08:53:40,837 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2023-02-18 08:53:40,837 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-18 08:53:40,837 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-18 08:53:40,838 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,840 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,844 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,845 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,846 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,847 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,849 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,851 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,854 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:40,860 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-18 08:53:40,864 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-18 08:53:40,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,867 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:40,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2023-02-18 08:53:40,872 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 [2023-02-18 08:53:40,878 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:40,878 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:40,879 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:40,879 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-18 08:53:40,879 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:40,880 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-18 08:53:40,880 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:40,897 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-18 08:53:40,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:40,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,906 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) [2023-02-18 08:53:40,909 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 [2023-02-18 08:53:40,911 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 [2023-02-18 08:53:40,917 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:40,918 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:40,918 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:40,918 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-18 08:53:40,918 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:40,919 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-18 08:53:40,919 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:40,920 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-18 08:53:40,923 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 [2023-02-18 08:53:40,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,926 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) [2023-02-18 08:53:40,928 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 [2023-02-18 08:53:40,929 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 [2023-02-18 08:53:40,935 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:40,935 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:40,935 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:40,935 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-18 08:53:40,935 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:40,936 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-18 08:53:40,936 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:40,938 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-18 08:53:40,943 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 [2023-02-18 08:53:40,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,944 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) [2023-02-18 08:53:40,946 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 [2023-02-18 08:53:40,949 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 [2023-02-18 08:53:40,956 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:40,956 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:40,957 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:40,957 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-18 08:53:40,957 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:40,958 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-18 08:53:40,958 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:40,977 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-18 08:53:40,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:40,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:40,982 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) [2023-02-18 08:53:40,985 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 [2023-02-18 08:53:40,986 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 [2023-02-18 08:53:40,992 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:40,992 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:40,992 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:40,993 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-18 08:53:40,993 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:40,993 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-18 08:53:40,993 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:41,017 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-18 08:53:41,021 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 [2023-02-18 08:53:41,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:41,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:41,023 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:41,032 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 [2023-02-18 08:53:41,039 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:41,040 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:41,040 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:41,040 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-18 08:53:41,040 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:41,041 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-18 08:53:41,041 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:41,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2023-02-18 08:53:41,053 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-18 08:53:41,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:41,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:41,059 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) [2023-02-18 08:53:41,060 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 [2023-02-18 08:53:41,062 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 [2023-02-18 08:53:41,069 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:41,070 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:41,070 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:41,070 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-18 08:53:41,070 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:41,071 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-18 08:53:41,071 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:41,075 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-18 08:53:41,080 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 [2023-02-18 08:53:41,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:41,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:41,081 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) [2023-02-18 08:53:41,084 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 [2023-02-18 08:53:41,085 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 [2023-02-18 08:53:41,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:41,091 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:41,091 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-02-18 08:53:41,091 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:41,102 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2023-02-18 08:53:41,103 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2023-02-18 08:53:41,130 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-18 08:53:41,155 INFO L443 ModelExtractionUtils]: Simplification made 14 calls to the SMT solver. [2023-02-18 08:53:41,155 INFO L444 ModelExtractionUtils]: 1 out of 11 variables were initially zero. Simplification set additionally 7 variables to zero. [2023-02-18 08:53:41,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:41,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:41,203 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) [2023-02-18 08:53:41,204 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 [2023-02-18 08:53:41,206 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-18 08:53:41,215 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2023-02-18 08:53:41,215 INFO L513 LassoAnalysis]: Proved termination. [2023-02-18 08:53:41,215 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2023-02-18 08:53:41,219 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 [2023-02-18 08:53:41,223 INFO L156 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2023-02-18 08:53:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 08:53:41,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:53:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 08:53:41,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:53:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:53:41,358 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 [2023-02-18 08:53:41,361 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:53:41,443 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 36 states and 43 transitions. Complement of second has 13 states. [2023-02-18 08:53:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2023-02-18 08:53:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:53:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2023-02-18 08:53:41,452 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2023-02-18 08:53:41,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-18 08:53:41,453 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2023-02-18 08:53:41,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-18 08:53:41,453 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2023-02-18 08:53:41,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-18 08:53:41,454 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 43 transitions. [2023-02-18 08:53:41,457 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-18 08:53:41,462 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 20 states and 26 transitions. [2023-02-18 08:53:41,462 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2023-02-18 08:53:41,463 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2023-02-18 08:53:41,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2023-02-18 08:53:41,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-18 08:53:41,465 INFO L218 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-02-18 08:53:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2023-02-18 08:53:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-02-18 08:53:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2023-02-18 08:53:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-02-18 08:53:41,489 INFO L240 hiAutomatonCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-02-18 08:53:41,489 INFO L428 stractBuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-02-18 08:53:41,490 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-02-18 08:53:41,490 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 22 transitions. [2023-02-18 08:53:41,491 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-18 08:53:41,491 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-18 08:53:41,491 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-18 08:53:41,492 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:53:41,492 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2023-02-18 08:53:41,492 INFO L748 eck$LassoCheckResult]: Stem: 127#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 128#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 129#L20 assume !(main_~x~0#1 < 0); 124#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 126#$Ultimate##0 ~x := #in~x; 130#L12 assume !(0 == ~x); 119#L15 call #t~ret0 := g(~x - 1);< 125#$Ultimate##0 ~x := #in~x; 131#L12 assume 0 == ~x;#res := 1; 118#gFINAL assume true; 120#gEXIT >#23#return; 122#L15-1 [2023-02-18 08:53:41,492 INFO L750 eck$LassoCheckResult]: Loop: 122#L15-1 call #t~ret1 := g(1 + #t~ret0);< 123#$Ultimate##0 ~x := #in~x; 134#L12 assume !(0 == ~x); 121#L15 call #t~ret0 := g(~x - 1);< 123#$Ultimate##0 ~x := #in~x; 134#L12 assume 0 == ~x;#res := 1; 133#gFINAL assume true; 135#gEXIT >#23#return; 122#L15-1 [2023-02-18 08:53:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 1 times [2023-02-18 08:53:41,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:41,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430699906] [2023-02-18 08:53:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:41,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:41,501 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:41,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:41,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1500125133, now seen corresponding path program 1 times [2023-02-18 08:53:41,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:41,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404882715] [2023-02-18 08:53:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:41,515 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:41,521 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:41,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:41,522 INFO L85 PathProgramCache]: Analyzing trace with hash 122773219, now seen corresponding path program 1 times [2023-02-18 08:53:41,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:41,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889466267] [2023-02-18 08:53:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:41,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 08:53:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:41,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-18 08:53:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 08:53:41,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:53:41,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889466267] [2023-02-18 08:53:41,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889466267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:53:41,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202497982] [2023-02-18 08:53:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:41,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:53:41,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:41,696 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:53:41,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 08:53:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:41,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 08:53:41,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:53:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 08:53:41,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:53:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 08:53:41,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202497982] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:53:41,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:53:41,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-02-18 08:53:41,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900047405] [2023-02-18 08:53:41,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:53:41,831 INFO L210 LassoAnalysis]: Preferences: [2023-02-18 08:53:41,832 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-18 08:53:41,832 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-18 08:53:41,832 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-18 08:53:41,832 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-18 08:53:41,832 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:41,832 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-18 08:53:41,832 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-18 08:53:41,832 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2023-02-18 08:53:41,832 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-18 08:53:41,832 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-18 08:53:41,833 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:41,834 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:41,836 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:41,839 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-18 08:53:41,839 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-18 08:53:41,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:41,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:41,845 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) [2023-02-18 08:53:41,866 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:41,866 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:41,875 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 [2023-02-18 08:53:41,877 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 [2023-02-18 08:53:41,892 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:41,893 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:41,898 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 [2023-02-18 08:53:41,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:41,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:41,900 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) [2023-02-18 08:53:41,909 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:41,909 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:41,913 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 [2023-02-18 08:53:41,937 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 [2023-02-18 08:53:41,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:41,939 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:41,949 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-18 08:53:41,949 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:41,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2023-02-18 08:53:42,468 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-18 08:53:42,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2023-02-18 08:53:42,472 INFO L210 LassoAnalysis]: Preferences: [2023-02-18 08:53:42,472 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-18 08:53:42,472 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-18 08:53:42,472 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-18 08:53:42,472 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-18 08:53:42,472 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:42,472 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-18 08:53:42,473 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-18 08:53:42,473 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2023-02-18 08:53:42,473 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-18 08:53:42,473 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-18 08:53:42,474 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:42,476 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:42,477 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:42,480 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-18 08:53:42,480 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-18 08:53:42,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:42,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:42,482 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:42,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2023-02-18 08:53:42,486 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 [2023-02-18 08:53:42,493 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:42,493 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:42,494 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:42,494 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-18 08:53:42,494 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:42,495 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-18 08:53:42,495 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:42,509 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-18 08:53:42,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:42,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:42,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:42,514 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:42,521 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 [2023-02-18 08:53:42,528 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:42,529 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:42,529 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:42,529 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-18 08:53:42,529 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:42,530 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-18 08:53:42,530 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:42,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2023-02-18 08:53:42,543 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-18 08:53:42,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2023-02-18 08:53:42,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:42,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:42,548 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:42,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2023-02-18 08:53:42,551 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 [2023-02-18 08:53:42,557 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-18 08:53:42,557 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-18 08:53:42,557 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-18 08:53:42,558 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2023-02-18 08:53:42,558 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-18 08:53:42,561 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2023-02-18 08:53:42,561 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-18 08:53:42,574 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-18 08:53:42,580 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-18 08:53:42,580 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-18 08:53:42,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:42,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:42,585 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:42,593 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-18 08:53:42,594 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-18 08:53:42,594 INFO L513 LassoAnalysis]: Proved termination. [2023-02-18 08:53:42,594 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2023-02-18 08:53:42,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2023-02-18 08:53:42,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:42,601 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-18 08:53:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:42,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 08:53:42,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:53:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:42,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 08:53:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:53:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:53:42,729 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2023-02-18 08:53:42,729 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6 Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-02-18 08:53:42,931 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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 83 states and 121 transitions. Complement of second has 31 states. [2023-02-18 08:53:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2023-02-18 08:53:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-02-18 08:53:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2023-02-18 08:53:42,936 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 8 letters. [2023-02-18 08:53:42,937 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-18 08:53:42,937 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 19 letters. Loop has 8 letters. [2023-02-18 08:53:42,937 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-18 08:53:42,937 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 16 letters. [2023-02-18 08:53:42,939 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-18 08:53:42,939 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 83 states and 121 transitions. [2023-02-18 08:53:42,949 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2023-02-18 08:53:42,955 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 83 states to 59 states and 82 transitions. [2023-02-18 08:53:42,956 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2023-02-18 08:53:42,957 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2023-02-18 08:53:42,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 82 transitions. [2023-02-18 08:53:42,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-18 08:53:42,958 INFO L218 hiAutomatonCegarLoop]: Abstraction has 59 states and 82 transitions. [2023-02-18 08:53:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 82 transitions. [2023-02-18 08:53:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-02-18 08:53:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 15 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (18), 11 states have call predecessors, (18), 13 states have call successors, (18) [2023-02-18 08:53:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2023-02-18 08:53:42,979 INFO L240 hiAutomatonCegarLoop]: Abstraction has 53 states and 72 transitions. [2023-02-18 08:53:42,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:53:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 08:53:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 08:53:42,982 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 08:53:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:53:43,039 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-02-18 08:53:43,039 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 45 transitions. [2023-02-18 08:53:43,040 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2023-02-18 08:53:43,041 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 31 states and 35 transitions. [2023-02-18 08:53:43,041 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2023-02-18 08:53:43,041 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2023-02-18 08:53:43,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 35 transitions. [2023-02-18 08:53:43,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-18 08:53:43,042 INFO L218 hiAutomatonCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-02-18 08:53:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 35 transitions. [2023-02-18 08:53:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-02-18 08:53:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 08:53:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-02-18 08:53:43,045 INFO L240 hiAutomatonCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-02-18 08:53:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 08:53:43,046 INFO L428 stractBuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-02-18 08:53:43,047 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-02-18 08:53:43,047 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2023-02-18 08:53:43,047 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2023-02-18 08:53:43,047 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-18 08:53:43,048 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-18 08:53:43,048 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:53:43,048 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-18 08:53:43,049 INFO L748 eck$LassoCheckResult]: Stem: 576#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 577#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; 578#L20 assume !(main_~x~0#1 < 0); 569#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 575#$Ultimate##0 ~x := #in~x; 581#L12 assume !(0 == ~x); 564#L15 call #t~ret0 := g(~x - 1);< 570#$Ultimate##0 ~x := #in~x; 582#L12 assume 0 == ~x;#res := 1; 563#gFINAL assume true; 565#gEXIT >#23#return; 567#L15-1 call #t~ret1 := g(1 + #t~ret0);< 579#$Ultimate##0 ~x := #in~x; 580#L12 assume !(0 == ~x); 566#L15 call #t~ret0 := g(~x - 1);< 568#$Ultimate##0 ~x := #in~x; 583#L12 assume !(0 == ~x); 572#L15 [2023-02-18 08:53:43,049 INFO L750 eck$LassoCheckResult]: Loop: 572#L15 call #t~ret0 := g(~x - 1);< 586#$Ultimate##0 ~x := #in~x; 584#L12 assume !(0 == ~x); 572#L15 [2023-02-18 08:53:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:43,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1443446059, now seen corresponding path program 2 times [2023-02-18 08:53:43,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:43,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778247734] [2023-02-18 08:53:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:43,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,064 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,071 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 50937, now seen corresponding path program 2 times [2023-02-18 08:53:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:43,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972706613] [2023-02-18 08:53:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,084 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:43,086 INFO L85 PathProgramCache]: Analyzing trace with hash -488954971, now seen corresponding path program 3 times [2023-02-18 08:53:43,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:43,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157981163] [2023-02-18 08:53:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:43,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:43,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 08:53:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:53:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 08:53:43,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:53:43,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157981163] [2023-02-18 08:53:43,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157981163] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:53:43,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7134445] [2023-02-18 08:53:43,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 08:53:43,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:53:43,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:43,224 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:53:43,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 08:53:43,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 08:53:43,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:53:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 08:53:43,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:53:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 08:53:43,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:53:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 08:53:43,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7134445] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:53:43,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:53:43,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-02-18 08:53:43,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138815327] [2023-02-18 08:53:43,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:53:43,357 INFO L210 LassoAnalysis]: Preferences: [2023-02-18 08:53:43,357 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-18 08:53:43,357 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-18 08:53:43,357 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-18 08:53:43,357 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-18 08:53:43,357 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:43,357 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-18 08:53:43,357 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-18 08:53:43,357 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2023-02-18 08:53:43,357 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-18 08:53:43,357 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-18 08:53:43,359 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:43,360 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:43,361 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:43,362 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-18 08:53:43,369 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-18 08:53:43,369 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-18 08:53:43,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:43,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:43,381 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:43,384 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:43,384 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:43,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2023-02-18 08:53:43,401 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:43,401 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:43,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:43,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:43,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:43,407 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:43,417 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:43,418 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:43,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2023-02-18 08:53:43,434 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:43,434 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:43,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:43,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:43,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:43,441 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:43,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2023-02-18 08:53:43,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:43,445 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:43,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:43,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:43,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:43,473 INFO L229 MonitoredProcess]: Starting monitored process 37 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) [2023-02-18 08:53:43,481 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-18 08:53:43,482 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:43,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2023-02-18 08:53:43,671 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:43,671 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-6, g_~x=-2} Honda state: {g_#in~x=-6, g_~x=-2} Generalized eigenvectors: [{g_#in~x=3, g_~x=-1}, {g_#in~x=-4, g_~x=0}, {g_#in~x=4, g_~x=0}] Lambdas: [1, 1, 0] Nus: [1, 1] [2023-02-18 08:53:43,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:43,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-18 08:53:43,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:53:43,682 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-18 08:53:43,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2023-02-18 08:53:43,686 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-18 08:53:43,686 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-18 08:53:43,708 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-18 08:53:43,708 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-18 08:53:43,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:43,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:53:43,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 08:53:43,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-18 08:53:43,716 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. cyclomatic complexity: 4 Second operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 08:53:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:53:43,823 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-02-18 08:53:43,823 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 29 transitions. [2023-02-18 08:53:43,823 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2023-02-18 08:53:43,824 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 28 states and 29 transitions. [2023-02-18 08:53:43,824 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2023-02-18 08:53:43,824 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2023-02-18 08:53:43,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 29 transitions. [2023-02-18 08:53:43,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-18 08:53:43,825 INFO L218 hiAutomatonCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-02-18 08:53:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 29 transitions. [2023-02-18 08:53:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-02-18 08:53:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 08:53:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-02-18 08:53:43,827 INFO L240 hiAutomatonCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-02-18 08:53:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 08:53:43,828 INFO L428 stractBuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-02-18 08:53:43,828 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-02-18 08:53:43,828 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 23 transitions. [2023-02-18 08:53:43,829 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2023-02-18 08:53:43,829 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-18 08:53:43,829 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-18 08:53:43,829 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:53:43,830 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2023-02-18 08:53:43,830 INFO L748 eck$LassoCheckResult]: Stem: 773#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 774#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; 775#L20 assume !(main_~x~0#1 < 0); 769#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 772#$Ultimate##0 ~x := #in~x; 777#L12 assume !(0 == ~x); 768#L15 call #t~ret0 := g(~x - 1);< 770#$Ultimate##0 ~x := #in~x; 778#L12 assume 0 == ~x;#res := 1; 782#gFINAL assume true; 771#gEXIT >#23#return; 766#L15-1 [2023-02-18 08:53:43,830 INFO L750 eck$LassoCheckResult]: Loop: 766#L15-1 call #t~ret1 := g(1 + #t~ret0);< 780#$Ultimate##0 ~x := #in~x; 779#L12 assume !(0 == ~x); 765#L15 call #t~ret0 := g(~x - 1);< 767#$Ultimate##0 ~x := #in~x; 776#L12 assume !(0 == ~x); 763#L15 call #t~ret0 := g(~x - 1);< 781#$Ultimate##0 ~x := #in~x; 783#L12 assume 0 == ~x;#res := 1; 762#gFINAL assume true; 764#gEXIT >#23#return; 766#L15-1 [2023-02-18 08:53:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 2 times [2023-02-18 08:53:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:43,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013962283] [2023-02-18 08:53:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:43,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,844 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,851 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:43,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1133998729, now seen corresponding path program 2 times [2023-02-18 08:53:43,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:43,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474385822] [2023-02-18 08:53:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:43,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,859 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,870 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:53:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1734292557, now seen corresponding path program 4 times [2023-02-18 08:53:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:53:43,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640710646] [2023-02-18 08:53:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:53:43,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:53:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,883 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,888 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 08:53:43,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,935 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 08:53:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 08:53:43,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.02 08:53:43 BoogieIcfgContainer [2023-02-18 08:53:43,964 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-02-18 08:53:43,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 08:53:43,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 08:53:43,965 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 08:53:43,966 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:53:39" (3/4) ... [2023-02-18 08:53:43,968 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-02-18 08:53:43,998 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 08:53:43,999 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 08:53:43,999 INFO L158 Benchmark]: Toolchain (without parser) took 4552.93ms. Allocated memory was 134.2MB in the beginning and 165.7MB in the end (delta: 31.5MB). Free memory was 89.3MB in the beginning and 128.0MB in the end (delta: -38.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 08:53:44,002 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 134.2MB. Free memory is still 100.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 08:53:44,002 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.86ms. Allocated memory is still 134.2MB. Free memory was 89.3MB in the beginning and 80.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-18 08:53:44,002 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.07ms. Allocated memory is still 134.2MB. Free memory was 80.3MB in the beginning and 78.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 08:53:44,002 INFO L158 Benchmark]: Boogie Preprocessor took 12.57ms. Allocated memory is still 134.2MB. Free memory was 78.9MB in the beginning and 78.3MB in the end (delta: 544.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 08:53:44,003 INFO L158 Benchmark]: RCFGBuilder took 233.47ms. Allocated memory is still 134.2MB. Free memory was 77.8MB in the beginning and 69.5MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-18 08:53:44,003 INFO L158 Benchmark]: BuchiAutomizer took 4072.77ms. Allocated memory was 134.2MB in the beginning and 165.7MB in the end (delta: 31.5MB). Free memory was 69.5MB in the beginning and 129.0MB in the end (delta: -59.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 08:53:44,003 INFO L158 Benchmark]: Witness Printer took 33.93ms. Allocated memory is still 165.7MB. Free memory was 129.0MB in the beginning and 128.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 08:53:44,005 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 134.2MB. Free memory is still 100.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.86ms. Allocated memory is still 134.2MB. Free memory was 89.3MB in the beginning and 80.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.07ms. Allocated memory is still 134.2MB. Free memory was 80.3MB in the beginning and 78.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.57ms. Allocated memory is still 134.2MB. Free memory was 78.9MB in the beginning and 78.3MB in the end (delta: 544.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 233.47ms. Allocated memory is still 134.2MB. Free memory was 77.8MB in the beginning and 69.5MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 4072.77ms. Allocated memory was 134.2MB in the beginning and 165.7MB in the end (delta: 31.5MB). Free memory was 69.5MB in the beginning and 129.0MB in the end (delta: -59.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 33.93ms. Allocated memory is still 165.7MB. Free memory was 129.0MB in the beginning and 128.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. 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 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function -2 * aux-g(x - 1)-aux + 1 and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 11 locations. The remainder module has 22 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.9s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 3.0s. Construction of modules took 0.1s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 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, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 65 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 141 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 92 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 242 IncrementalHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 49 mSDtfsCounter, 242 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq191 hnf93 smp100 dnf165 smp100 tf102 neg94 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 134ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.3s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) VAL [x=1] [L21] CALL g(x) VAL [\old(x)=1] [L12] COND FALSE !(x == 0) VAL [\old(x)=1, x=1] [L15] CALL g(x - 1) VAL [\old(x)=0] [L12] COND TRUE x == 0 [L13] return 1; VAL [\old(x)=0, \result=1, x=0] [L15] RET g(x - 1) VAL [\old(x)=1, g(x - 1)=1, x=1] Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 15]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) VAL [x=1] [L21] CALL g(x) VAL [\old(x)=1] [L12] COND FALSE !(x == 0) VAL [\old(x)=1, x=1] [L15] CALL g(x - 1) VAL [\old(x)=0] [L12] COND TRUE x == 0 [L13] return 1; VAL [\old(x)=0, \result=1, x=0] [L15] RET g(x - 1) VAL [\old(x)=1, g(x - 1)=1, x=1] Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2023-02-18 08:53:44,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 08:53:44,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-18 08:53:44,448 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)