./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e8d55036 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_1d.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 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 23:12:27,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 23:12:27,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 23:12:27,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 23:12:27,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 23:12:27,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 23:12:27,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 23:12:27,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 23:12:27,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 23:12:27,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 23:12:27,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 23:12:27,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 23:12:27,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 23:12:27,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 23:12:27,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 23:12:27,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 23:12:27,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 23:12:27,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 23:12:27,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 23:12:27,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 23:12:27,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 23:12:27,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 23:12:27,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 23:12:27,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 23:12:27,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 23:12:27,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 23:12:27,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 23:12:27,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 23:12:27,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 23:12:27,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 23:12:27,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 23:12:27,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 23:12:27,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 23:12:27,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 23:12:27,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 23:12:27,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 23:12:27,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 23:12:27,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 23:12:27,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 23:12:27,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 23:12:27,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 23:12:27,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-02-15 23:12:27,495 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 23:12:27,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 23:12:27,496 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 23:12:27,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 23:12:27,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 23:12:27,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 23:12:27,497 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 23:12:27,497 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-02-15 23:12:27,497 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-02-15 23:12:27,498 INFO L138 SettingsManager]: * Use old map elimination=false [2023-02-15 23:12:27,498 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2023-02-15 23:12:27,498 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2023-02-15 23:12:27,499 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-02-15 23:12:27,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 23:12:27,499 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 23:12:27,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 23:12:27,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 23:12:27,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-02-15 23:12:27,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-02-15 23:12:27,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-02-15 23:12:27,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 23:12:27,500 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-02-15 23:12:27,500 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 23:12:27,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-02-15 23:12:27,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 23:12:27,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 23:12:27,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 23:12:27,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 23:12:27,502 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-02-15 23:12:27,502 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b [2023-02-15 23:12:27,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 23:12:27,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 23:12:27,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 23:12:27,723 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 23:12:27,723 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 23:12:27,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2023-02-15 23:12:28,744 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 23:12:28,886 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 23:12:28,887 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2023-02-15 23:12:28,891 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c62b2d285/d7d02e9081f2406ba36d21e311be893f/FLAGb28150600 [2023-02-15 23:12:28,904 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c62b2d285/d7d02e9081f2406ba36d21e311be893f [2023-02-15 23:12:28,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 23:12:28,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 23:12:28,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 23:12:28,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 23:12:28,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 23:12:28,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:12:28" (1/1) ... [2023-02-15 23:12:28,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d3806d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:28, skipping insertion in model container [2023-02-15 23:12:28,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:12:28" (1/1) ... [2023-02-15 23:12:28,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 23:12:28,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 23:12:29,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:12:29,034 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 23:12:29,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:12:29,050 INFO L208 MainTranslator]: Completed translation [2023-02-15 23:12:29,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29 WrapperNode [2023-02-15 23:12:29,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 23:12:29,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 23:12:29,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 23:12:29,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 23:12:29,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,068 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2023-02-15 23:12:29,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 23:12:29,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 23:12:29,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 23:12:29,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 23:12:29,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,080 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 23:12:29,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 23:12:29,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 23:12:29,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 23:12:29,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (1/1) ... [2023-02-15 23:12:29,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:29,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:29,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:29,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-02-15 23:12:29,140 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2023-02-15 23:12:29,140 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2023-02-15 23:12:29,140 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2023-02-15 23:12:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2023-02-15 23:12:29,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 23:12:29,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 23:12:29,175 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 23:12:29,177 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 23:12:29,251 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 23:12:29,256 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 23:12:29,257 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 23:12:29,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:12:29 BoogieIcfgContainer [2023-02-15 23:12:29,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 23:12:29,270 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-02-15 23:12:29,270 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2023-02-15 23:12:29,273 INFO L275 PluginConnector]: BuchiAutomizer initialized [2023-02-15 23:12:29,273 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 23:12:29,273 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.02 11:12:28" (1/3) ... [2023-02-15 23:12:29,274 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5929d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 11:12:29, skipping insertion in model container [2023-02-15 23:12:29,274 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 23:12:29,274 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:12:29" (2/3) ... [2023-02-15 23:12:29,275 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5929d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 11:12:29, skipping insertion in model container [2023-02-15 23:12:29,275 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 23:12:29,275 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:12:29" (3/3) ... [2023-02-15 23:12:29,276 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d.c [2023-02-15 23:12:29,315 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-02-15 23:12:29,315 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-02-15 23:12:29,315 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-02-15 23:12:29,315 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-02-15 23:12:29,315 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-02-15 23:12:29,316 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-02-15 23:12:29,316 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-02-15 23:12:29,316 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-02-15 23:12:29,320 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 23:12:29,335 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:29,335 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 23:12:29,335 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 23:12:29,339 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-02-15 23:12:29,339 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:12:29,340 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-02-15 23:12:29,340 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 23:12:29,344 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:29,344 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 23:12:29,345 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 23:12:29,345 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-02-15 23:12:29,345 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:12:29,352 INFO L748 eck$LassoCheckResult]: Stem: 21#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 14#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 10#L25true call main_#t~ret6#1 := rec2(main_~x~0#1);< 7#$Ultimate##0true [2023-02-15 23:12:29,354 INFO L750 eck$LassoCheckResult]: Loop: 7#$Ultimate##0true ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j);< 4#$Ultimate##0true ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 15#rec1FINALtrue assume true; 16#rec1EXITtrue >#34#return; 3#L20-1true call #t~ret4 := rec2(#t~ret3 - 1);< 7#$Ultimate##0true [2023-02-15 23:12:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2023-02-15 23:12:29,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:29,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293112213] [2023-02-15 23:12:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:29,427 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:29,448 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2023-02-15 23:12:29,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:29,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957791861] [2023-02-15 23:12:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:29,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 23:12:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:29,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:12:29,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957791861] [2023-02-15 23:12:29,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957791861] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:12:29,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:12:29,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 23:12:29,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686804296] [2023-02-15 23:12:29,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:12:29,634 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-02-15 23:12:29,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:12:29,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 23:12:29,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:12:29,671 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 23:12:29,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:12:29,758 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2023-02-15 23:12:29,759 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 34 transitions. [2023-02-15 23:12:29,761 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:29,765 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2023-02-15 23:12:29,766 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2023-02-15 23:12:29,766 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2023-02-15 23:12:29,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2023-02-15 23:12:29,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-15 23:12:29,768 INFO L218 hiAutomatonCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-15 23:12:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2023-02-15 23:12:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 23:12:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 23:12:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-02-15 23:12:29,787 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-15 23:12:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 23:12:29,791 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-02-15 23:12:29,791 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-02-15 23:12:29,791 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2023-02-15 23:12:29,792 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:29,792 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 23:12:29,792 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 23:12:29,793 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-02-15 23:12:29,793 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:12:29,793 INFO L748 eck$LassoCheckResult]: Stem: 80#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 77#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 66#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 67#$Ultimate##0 [2023-02-15 23:12:29,793 INFO L750 eck$LassoCheckResult]: Loop: 67#$Ultimate##0 ~j := #in~j; 74#L18 assume !(~j <= 0); 72#L20 call #t~ret3 := rec1(~j);< 68#$Ultimate##0 ~i := #in~i; 73#L12 assume !(~i <= 0); 69#L14 call #t~ret0 := rec1(~i - 2);< 68#$Ultimate##0 ~i := #in~i; 73#L12 assume ~i <= 0;#res := 0; 78#rec1FINAL assume true; 79#rec1EXIT >#28#return; 70#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 68#$Ultimate##0 ~i := #in~i; 73#L12 assume ~i <= 0;#res := 0; 78#rec1FINAL assume true; 79#rec1EXIT >#30#return; 71#L14-2 call #t~ret2 := rec1(#t~ret1);< 68#$Ultimate##0 ~i := #in~i; 73#L12 assume ~i <= 0;#res := 0; 78#rec1FINAL assume true; 79#rec1EXIT >#32#return; 75#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 76#rec1FINAL assume true; 81#rec1EXIT >#34#return; 65#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 67#$Ultimate##0 [2023-02-15 23:12:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 2 times [2023-02-15 23:12:29,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:29,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193894759] [2023-02-15 23:12:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:29,800 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:29,802 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:29,804 INFO L85 PathProgramCache]: Analyzing trace with hash -204878921, now seen corresponding path program 1 times [2023-02-15 23:12:29,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:29,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957721420] [2023-02-15 23:12:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:29,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:29,817 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:29,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:29,828 INFO L85 PathProgramCache]: Analyzing trace with hash -482494696, now seen corresponding path program 1 times [2023-02-15 23:12:29,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:29,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190284379] [2023-02-15 23:12:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:29,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:29,839 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:29,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:30,121 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:30,121 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:30,121 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:30,122 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:30,122 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 23:12:30,122 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,122 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:30,122 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:30,122 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2023-02-15 23:12:30,122 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:30,122 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:30,132 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,141 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,143 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,145 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,151 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,207 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:30,215 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 23:12:30,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-02-15 23:12:30,223 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:30,223 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:30,248 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:30,248 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:30,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:30,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,271 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:30,271 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:30,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-02-15 23:12:30,293 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:30,293 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:30,298 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 [2023-02-15 23:12:30,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-02-15 23:12:30,304 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:30,304 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:30,311 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:30,312 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:30,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:30,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-02-15 23:12:30,319 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:30,319 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:30,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:30,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,350 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-02-15 23:12:30,367 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 23:12:30,367 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:30,383 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 23:12:30,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:30,389 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:30,389 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:30,389 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:30,389 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:30,389 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 23:12:30,389 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,389 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:30,389 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:30,389 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2023-02-15 23:12:30,390 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:30,390 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:30,390 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,392 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,394 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,395 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,399 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:30,423 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:30,426 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 23:12:30,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,428 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-02-15 23:12:30,433 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:30,439 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:30,439 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:30,440 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:30,440 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:30,440 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:30,441 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:30,441 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:30,457 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:30,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:30,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,464 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-02-15 23:12:30,468 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:30,474 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:30,475 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:30,475 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:30,475 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:30,475 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:30,476 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:30,476 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:30,490 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:30,493 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 [2023-02-15 23:12:30,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-02-15 23:12:30,502 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:30,508 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:30,508 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:30,508 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:30,508 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:30,508 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:30,511 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:30,511 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:30,525 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:30,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:30,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-02-15 23:12:30,548 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:30,554 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:30,554 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:30,554 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:30,554 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:30,554 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:30,555 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:30,555 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:30,565 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 23:12:30,568 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-15 23:12:30,568 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-02-15 23:12:30,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:30,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:30,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:30,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-02-15 23:12:30,616 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 23:12:30,617 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 23:12:30,617 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 23:12:30,617 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2023-02-15 23:12:30,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:30,622 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 23:12:30,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:30,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 23:12:30,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:30,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 23:12:30,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 23:12:30,859 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2023-02-15 23:12:30,861 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8 Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:31,113 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Result 102 states and 148 transitions. Complement of second has 42 states. [2023-02-15 23:12:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2023-02-15 23:12:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2023-02-15 23:12:31,118 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 24 letters. [2023-02-15 23:12:31,119 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:31,119 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 27 letters. Loop has 24 letters. [2023-02-15 23:12:31,120 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:31,120 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 48 letters. [2023-02-15 23:12:31,122 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:31,122 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 102 states and 148 transitions. [2023-02-15 23:12:31,129 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:31,131 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 102 states to 90 states and 136 transitions. [2023-02-15 23:12:31,132 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2023-02-15 23:12:31,132 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2023-02-15 23:12:31,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 136 transitions. [2023-02-15 23:12:31,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 23:12:31,132 INFO L218 hiAutomatonCegarLoop]: Abstraction has 90 states and 136 transitions. [2023-02-15 23:12:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states and 136 transitions. [2023-02-15 23:12:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2023-02-15 23:12:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (41), 18 states have call predecessors, (41), 16 states have call successors, (41) [2023-02-15 23:12:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 99 transitions. [2023-02-15 23:12:31,141 INFO L240 hiAutomatonCegarLoop]: Abstraction has 63 states and 99 transitions. [2023-02-15 23:12:31,141 INFO L428 stractBuchiCegarLoop]: Abstraction has 63 states and 99 transitions. [2023-02-15 23:12:31,141 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-02-15 23:12:31,142 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 63 states and 99 transitions. [2023-02-15 23:12:31,143 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:31,143 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 23:12:31,143 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 23:12:31,143 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:12:31,143 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 23:12:31,143 INFO L748 eck$LassoCheckResult]: Stem: 385#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 378#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 346#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 355#$Ultimate##0 ~j := #in~j; 356#L18 assume !(~j <= 0); 350#L20 call #t~ret3 := rec1(~j);< 349#$Ultimate##0 ~i := #in~i; 351#L12 assume !(~i <= 0); 360#L14 call #t~ret0 := rec1(~i - 2);< 376#$Ultimate##0 [2023-02-15 23:12:31,144 INFO L750 eck$LassoCheckResult]: Loop: 376#$Ultimate##0 ~i := #in~i; 393#L12 assume !(~i <= 0); 359#L14 call #t~ret0 := rec1(~i - 2);< 376#$Ultimate##0 [2023-02-15 23:12:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2023-02-15 23:12:31,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:31,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003764042] [2023-02-15 23:12:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:31,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,162 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,166 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:31,166 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2023-02-15 23:12:31,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:31,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144036346] [2023-02-15 23:12:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:31,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,169 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,173 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:31,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2023-02-15 23:12:31,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:31,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080657491] [2023-02-15 23:12:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:31,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,183 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:31,209 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:31,209 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:31,210 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:31,210 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:31,210 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 23:12:31,210 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,210 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:31,210 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:31,210 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2023-02-15 23:12:31,210 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:31,210 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:31,211 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,213 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,214 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,216 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,218 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,237 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,266 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:31,266 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 23:12:31,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:31,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-02-15 23:12:31,282 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:31,282 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:31,290 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:31,290 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:31,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:31,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,294 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-02-15 23:12:31,299 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:31,299 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:31,306 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:31,306 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:31,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:31,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,310 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-02-15 23:12:31,315 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:31,315 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:31,322 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:31,322 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:31,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:31,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,326 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-02-15 23:12:31,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:31,329 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:31,336 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:31,336 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:31,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:31,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,344 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) [2023-02-15 23:12:31,361 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 [2023-02-15 23:12:31,396 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:31,396 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:31,406 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 [2023-02-15 23:12:31,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,407 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-02-15 23:12:31,411 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 23:12:31,411 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:31,425 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 23:12:31,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:31,429 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:31,429 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:31,429 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:31,429 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:31,429 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 23:12:31,429 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,429 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:31,429 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:31,429 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2023-02-15 23:12:31,429 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:31,429 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:31,430 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,433 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,435 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,436 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,438 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,442 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,475 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:31,475 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 23:12:31,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,476 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-02-15 23:12:31,481 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:31,487 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:31,487 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:31,488 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:31,488 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:31,488 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:31,488 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:31,488 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:31,508 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:31,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:31,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,520 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-02-15 23:12:31,524 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:31,530 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:31,531 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:31,531 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:31,531 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:31,531 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:31,532 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:31,532 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:31,546 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:31,552 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 [2023-02-15 23:12:31,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,554 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-02-15 23:12:31,557 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:31,563 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:31,564 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:31,564 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:31,564 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:31,564 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:31,564 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:31,564 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:31,578 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:31,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,585 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) [2023-02-15 23:12:31,594 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:31,600 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:31,600 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:31,600 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:31,600 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:31,600 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:31,601 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:31,601 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:31,604 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 [2023-02-15 23:12:31,612 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:31,619 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 [2023-02-15 23:12:31,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,621 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-02-15 23:12:31,625 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:31,631 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:31,631 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:31,631 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:31,631 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:31,631 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:31,632 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:31,632 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:31,634 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 23:12:31,635 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-02-15 23:12:31,635 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 23:12:31,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,636 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-02-15 23:12:31,639 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 23:12:31,639 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 23:12:31,639 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 23:12:31,639 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-02-15 23:12:31,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2023-02-15 23:12:31,642 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 23:12:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:31,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 23:12:31,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:31,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:31,730 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-02-15 23:12:31,730 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40 Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:12:31,761 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 109 states and 166 transitions. Complement of second has 13 states. [2023-02-15 23:12:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-02-15 23:12:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:12:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2023-02-15 23:12:31,763 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 3 letters. [2023-02-15 23:12:31,763 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:31,763 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 12 letters. Loop has 3 letters. [2023-02-15 23:12:31,763 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:31,763 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 6 letters. [2023-02-15 23:12:31,763 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:31,764 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 166 transitions. [2023-02-15 23:12:31,766 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:31,768 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 97 states and 154 transitions. [2023-02-15 23:12:31,768 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2023-02-15 23:12:31,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2023-02-15 23:12:31,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 154 transitions. [2023-02-15 23:12:31,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 23:12:31,768 INFO L218 hiAutomatonCegarLoop]: Abstraction has 97 states and 154 transitions. [2023-02-15 23:12:31,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 154 transitions. [2023-02-15 23:12:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2023-02-15 23:12:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 60 states have internal predecessors, (62), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (56), 18 states have call predecessors, (56), 22 states have call successors, (56) [2023-02-15 23:12:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 144 transitions. [2023-02-15 23:12:31,775 INFO L240 hiAutomatonCegarLoop]: Abstraction has 93 states and 144 transitions. [2023-02-15 23:12:31,775 INFO L428 stractBuchiCegarLoop]: Abstraction has 93 states and 144 transitions. [2023-02-15 23:12:31,775 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-02-15 23:12:31,775 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 144 transitions. [2023-02-15 23:12:31,776 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:31,776 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 23:12:31,777 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 23:12:31,777 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:12:31,777 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 23:12:31,777 INFO L748 eck$LassoCheckResult]: Stem: 633#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 623#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 585#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 602#$Ultimate##0 ~j := #in~j; 603#L18 assume !(~j <= 0); 628#L20 call #t~ret3 := rec1(~j);< 632#$Ultimate##0 ~i := #in~i; 650#L12 assume !(~i <= 0); 608#L14 call #t~ret0 := rec1(~i - 2);< 648#$Ultimate##0 ~i := #in~i; 653#L12 assume ~i <= 0;#res := 0; 652#rec1FINAL assume true; 647#rec1EXIT >#28#return; 595#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 589#$Ultimate##0 [2023-02-15 23:12:31,777 INFO L750 eck$LassoCheckResult]: Loop: 589#$Ultimate##0 ~i := #in~i; 597#L12 assume !(~i <= 0); 591#L14 call #t~ret0 := rec1(~i - 2);< 589#$Ultimate##0 [2023-02-15 23:12:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2023-02-15 23:12:31,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:31,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065850054] [2023-02-15 23:12:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,784 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,788 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2023-02-15 23:12:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:31,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134707718] [2023-02-15 23:12:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:31,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,793 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:31,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:31,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2023-02-15 23:12:31,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:31,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683173749] [2023-02-15 23:12:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:31,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:31,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 23:12:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 23:12:31,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:12:31,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683173749] [2023-02-15 23:12:31,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683173749] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:12:31,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 23:12:31,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 23:12:31,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757808773] [2023-02-15 23:12:31,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:12:31,906 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:31,906 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:31,906 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:31,906 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:31,906 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 23:12:31,906 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,906 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:31,907 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:31,907 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2023-02-15 23:12:31,907 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:31,907 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:31,907 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,908 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,912 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,913 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,914 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,916 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:31,934 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:31,935 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 23:12:31,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,936 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-02-15 23:12:31,939 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:31,944 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:31,961 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:31,961 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:31,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:31,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,968 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-02-15 23:12:31,971 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:31,971 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:31,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2023-02-15 23:12:31,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:31,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:31,981 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:31,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-02-15 23:12:31,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 23:12:31,984 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:32,036 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 23:12:32,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:32,042 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:32,042 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:32,042 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:32,042 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:32,042 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 23:12:32,042 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:32,042 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:32,042 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:32,042 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2023-02-15 23:12:32,042 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:32,042 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:32,043 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,045 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,049 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,051 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,052 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,054 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,072 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:32,072 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 23:12:32,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:32,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:32,074 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:32,085 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 [2023-02-15 23:12:32,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:32,091 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:32,091 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:32,091 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:32,091 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:32,092 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:32,092 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:32,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-02-15 23:12:32,109 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:32,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:32,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:32,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:32,116 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) [2023-02-15 23:12:32,118 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 [2023-02-15 23:12:32,119 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:32,125 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:32,125 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:32,125 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:32,125 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:32,125 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:32,126 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:32,126 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:32,132 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 23:12:32,134 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-02-15 23:12:32,134 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 23:12:32,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:32,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:32,137 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) [2023-02-15 23:12:32,140 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 [2023-02-15 23:12:32,140 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 23:12:32,140 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 23:12:32,140 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 23:12:32,140 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-02-15 23:12:32,143 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 [2023-02-15 23:12:32,143 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 23:12:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 23:12:32,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:32,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:32,272 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 23:12:32,272 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 23:12:32,324 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 133 states and 208 transitions. Complement of second has 14 states. [2023-02-15 23:12:32,325 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 [2023-02-15 23:12:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 23:12:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2023-02-15 23:12:32,326 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 3 letters. [2023-02-15 23:12:32,326 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:32,326 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 17 letters. Loop has 3 letters. [2023-02-15 23:12:32,326 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:32,326 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 6 letters. [2023-02-15 23:12:32,326 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:32,326 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 208 transitions. [2023-02-15 23:12:32,328 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:32,331 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 121 states and 196 transitions. [2023-02-15 23:12:32,331 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2023-02-15 23:12:32,331 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2023-02-15 23:12:32,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 196 transitions. [2023-02-15 23:12:32,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 23:12:32,331 INFO L218 hiAutomatonCegarLoop]: Abstraction has 121 states and 196 transitions. [2023-02-15 23:12:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 196 transitions. [2023-02-15 23:12:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2023-02-15 23:12:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 76 states have internal predecessors, (80), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (74), 22 states have call predecessors, (74), 28 states have call successors, (74) [2023-02-15 23:12:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 186 transitions. [2023-02-15 23:12:32,346 INFO L240 hiAutomatonCegarLoop]: Abstraction has 117 states and 186 transitions. [2023-02-15 23:12:32,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:12:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 23:12:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 23:12:32,347 INFO L87 Difference]: Start difference. First operand 117 states and 186 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 23:12:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:12:32,384 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2023-02-15 23:12:32,384 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 130 states and 196 transitions. [2023-02-15 23:12:32,393 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2023-02-15 23:12:32,395 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 130 states to 128 states and 194 transitions. [2023-02-15 23:12:32,395 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 60 [2023-02-15 23:12:32,395 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 60 [2023-02-15 23:12:32,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 194 transitions. [2023-02-15 23:12:32,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 23:12:32,396 INFO L218 hiAutomatonCegarLoop]: Abstraction has 128 states and 194 transitions. [2023-02-15 23:12:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 194 transitions. [2023-02-15 23:12:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2023-02-15 23:12:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 66 states have internal predecessors, (68), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (60), 22 states have call predecessors, (60), 26 states have call successors, (60) [2023-02-15 23:12:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 158 transitions. [2023-02-15 23:12:32,407 INFO L240 hiAutomatonCegarLoop]: Abstraction has 105 states and 158 transitions. [2023-02-15 23:12:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 23:12:32,408 INFO L428 stractBuchiCegarLoop]: Abstraction has 105 states and 158 transitions. [2023-02-15 23:12:32,408 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2023-02-15 23:12:32,408 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 105 states and 158 transitions. [2023-02-15 23:12:32,409 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 [2023-02-15 23:12:32,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:32,421 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2023-02-15 23:12:32,421 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 23:12:32,421 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 23:12:32,421 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:12:32,422 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 23:12:32,422 INFO L748 eck$LassoCheckResult]: Stem: 1209#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1197#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1157#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1194#$Ultimate##0 ~j := #in~j; 1225#L18 assume !(~j <= 0); 1217#L20 call #t~ret3 := rec1(~j);< 1224#$Ultimate##0 ~i := #in~i; 1223#L12 assume !(~i <= 0); 1178#L14 call #t~ret0 := rec1(~i - 2);< 1221#$Ultimate##0 ~i := #in~i; 1220#L12 assume !(~i <= 0); 1174#L14 call #t~ret0 := rec1(~i - 2);< 1219#$Ultimate##0 ~i := #in~i; 1206#L12 assume ~i <= 0;#res := 0; 1198#rec1FINAL assume true; 1199#rec1EXIT >#28#return; 1162#L14-1 [2023-02-15 23:12:32,422 INFO L750 eck$LassoCheckResult]: Loop: 1162#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1161#$Ultimate##0 ~i := #in~i; 1164#L12 assume ~i <= 0;#res := 0; 1253#rec1FINAL assume true; 1248#rec1EXIT >#30#return; 1175#L14-2 call #t~ret2 := rec1(#t~ret1);< 1195#$Ultimate##0 ~i := #in~i; 1251#L12 assume !(~i <= 0); 1177#L14 call #t~ret0 := rec1(~i - 2);< 1195#$Ultimate##0 ~i := #in~i; 1251#L12 assume ~i <= 0;#res := 0; 1250#rec1FINAL assume true; 1249#rec1EXIT >#28#return; 1162#L14-1 [2023-02-15 23:12:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2023-02-15 23:12:32,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:32,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305205921] [2023-02-15 23:12:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:32,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:32,427 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:32,430 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:32,431 INFO L85 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2023-02-15 23:12:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:32,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658285050] [2023-02-15 23:12:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:32,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-02-15 23:12:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 23:12:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 23:12:32,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:12:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658285050] [2023-02-15 23:12:32,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658285050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:12:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180606231] [2023-02-15 23:12:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:32,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:12:32,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:32,492 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:12:32,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 23:12:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 23:12:32,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:32,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:12:32,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180606231] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:12:32,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:12:32,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2023-02-15 23:12:32,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075494340] [2023-02-15 23:12:32,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:12:32,547 INFO L765 eck$LassoCheckResult]: loop already infeasible [2023-02-15 23:12:32,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:12:32,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 23:12:32,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 23:12:32,548 INFO L87 Difference]: Start difference. First operand 105 states and 158 transitions. cyclomatic complexity: 59 Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:12:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:12:32,603 INFO L93 Difference]: Finished difference Result 120 states and 174 transitions. [2023-02-15 23:12:32,604 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 120 states and 174 transitions. [2023-02-15 23:12:32,605 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:32,607 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 120 states to 115 states and 165 transitions. [2023-02-15 23:12:32,607 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2023-02-15 23:12:32,607 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2023-02-15 23:12:32,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 165 transitions. [2023-02-15 23:12:32,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 23:12:32,607 INFO L218 hiAutomatonCegarLoop]: Abstraction has 115 states and 165 transitions. [2023-02-15 23:12:32,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states and 165 transitions. [2023-02-15 23:12:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2023-02-15 23:12:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.109375) internal successors, (71), 69 states have internal predecessors, (71), 32 states have call successors, (32), 18 states have call predecessors, (32), 16 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2023-02-15 23:12:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 162 transitions. [2023-02-15 23:12:32,613 INFO L240 hiAutomatonCegarLoop]: Abstraction has 112 states and 162 transitions. [2023-02-15 23:12:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 23:12:32,614 INFO L428 stractBuchiCegarLoop]: Abstraction has 112 states and 162 transitions. [2023-02-15 23:12:32,614 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2023-02-15 23:12:32,614 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 112 states and 162 transitions. [2023-02-15 23:12:32,615 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2023-02-15 23:12:32,615 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 23:12:32,615 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 23:12:32,616 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:12:32,616 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 23:12:32,616 INFO L748 eck$LassoCheckResult]: Stem: 1499#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 1485#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1441#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1469#$Ultimate##0 ~j := #in~j; 1510#L18 assume !(~j <= 0); 1455#L20 call #t~ret3 := rec1(~j);< 1509#$Ultimate##0 ~i := #in~i; 1508#L12 assume !(~i <= 0); 1475#L14 call #t~ret0 := rec1(~i - 2);< 1507#$Ultimate##0 ~i := #in~i; 1505#L12 assume !(~i <= 0); 1472#L14 call #t~ret0 := rec1(~i - 2);< 1504#$Ultimate##0 ~i := #in~i; 1506#L12 assume ~i <= 0;#res := 0; 1486#rec1FINAL assume true; 1487#rec1EXIT >#28#return; 1479#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1480#$Ultimate##0 ~i := #in~i; 1517#L12 assume ~i <= 0;#res := 0; 1516#rec1FINAL assume true; 1514#rec1EXIT >#30#return; 1446#L14-2 call #t~ret2 := rec1(#t~ret1);< 1445#$Ultimate##0 ~i := #in~i; 1447#L12 assume ~i <= 0;#res := 0; 1493#rec1FINAL assume true; 1490#rec1EXIT >#32#return; 1491#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1519#rec1FINAL assume true; 1518#rec1EXIT >#28#return; 1476#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1496#$Ultimate##0 [2023-02-15 23:12:32,616 INFO L750 eck$LassoCheckResult]: Loop: 1496#$Ultimate##0 ~i := #in~i; 1521#L12 assume !(~i <= 0); 1473#L14 call #t~ret0 := rec1(~i - 2);< 1496#$Ultimate##0 [2023-02-15 23:12:32,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:32,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2023-02-15 23:12:32,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:32,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477599014] [2023-02-15 23:12:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:32,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:32,627 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:32,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2023-02-15 23:12:32,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:32,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236245033] [2023-02-15 23:12:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:32,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:32,635 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:32,636 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:32,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1475637376, now seen corresponding path program 2 times [2023-02-15 23:12:32,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:32,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562614048] [2023-02-15 23:12:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:32,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 23:12:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 23:12:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:12:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:12:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 23:12:32,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:12:32,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562614048] [2023-02-15 23:12:32,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562614048] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:12:32,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462496452] [2023-02-15 23:12:32,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:12:32,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:12:32,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:32,746 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:12:32,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 23:12:32,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:12:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:12:32,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 23:12:32,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:12:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-15 23:12:32,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462496452] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:12:32,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:12:32,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-02-15 23:12:32,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497533301] [2023-02-15 23:12:32,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:12:32,901 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:32,901 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:32,901 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:32,901 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:32,901 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 23:12:32,901 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:32,901 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:32,902 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:32,902 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2023-02-15 23:12:32,902 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:32,902 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:32,903 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,905 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,906 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,907 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,909 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,910 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:32,929 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:32,929 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 23:12:32,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:32,930 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) [2023-02-15 23:12:32,937 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:32,937 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:32,946 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 [2023-02-15 23:12:32,955 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:32,955 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:32,961 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 [2023-02-15 23:12:32,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:32,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:32,962 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:32,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2023-02-15 23:12:32,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:32,966 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:32,985 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:32,985 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:32,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:32,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:32,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:32,998 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) [2023-02-15 23:12:33,000 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 [2023-02-15 23:12:33,001 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:33,002 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:33,008 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:33,008 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:33,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2023-02-15 23:12:33,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,012 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) [2023-02-15 23:12:33,012 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 [2023-02-15 23:12:33,014 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:33,014 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:33,021 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:33,021 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:33,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2023-02-15 23:12:33,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,025 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) [2023-02-15 23:12:33,026 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 [2023-02-15 23:12:33,027 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:33,028 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:33,034 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:33,034 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:33,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2023-02-15 23:12:33,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,038 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) [2023-02-15 23:12:33,038 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 [2023-02-15 23:12:33,040 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:33,041 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:33,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2023-02-15 23:12:33,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,058 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) [2023-02-15 23:12:33,059 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 [2023-02-15 23:12:33,062 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 23:12:33,062 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:33,106 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 23:12:33,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2023-02-15 23:12:33,109 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:33,109 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:33,109 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:33,109 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:33,109 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 23:12:33,109 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,109 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:33,109 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:33,109 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2023-02-15 23:12:33,109 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:33,109 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:33,110 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:33,112 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:33,114 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:33,115 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:33,117 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:33,118 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:33,138 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:33,138 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 23:12:33,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,139 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:33,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2023-02-15 23:12:33,143 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:33,148 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:33,148 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:33,148 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:33,149 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:33,149 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:33,149 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:33,149 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:33,150 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:33,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2023-02-15 23:12:33,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,153 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:33,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2023-02-15 23:12:33,157 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:33,162 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:33,162 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:33,163 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:33,163 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:33,163 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:33,163 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:33,163 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:33,178 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:33,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2023-02-15 23:12:33,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,182 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:33,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2023-02-15 23:12:33,185 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:33,190 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:33,191 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:33,191 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:33,191 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:33,191 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:33,191 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:33,191 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:33,200 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:33,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:33,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,215 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:33,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2023-02-15 23:12:33,218 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:33,223 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:33,223 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:33,224 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:33,224 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:33,224 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:33,224 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:33,224 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:33,225 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:33,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2023-02-15 23:12:33,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,229 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:33,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2023-02-15 23:12:33,231 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:33,237 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:33,237 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:33,237 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:33,237 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:33,237 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:33,238 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:33,238 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:33,238 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 23:12:33,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2023-02-15 23:12:33,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,242 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:33,253 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:33,259 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:33,259 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:33,259 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:33,259 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:33,259 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:33,260 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:33,260 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:33,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2023-02-15 23:12:33,272 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 23:12:33,273 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-02-15 23:12:33,273 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 23:12:33,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:33,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:33,276 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:33,278 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 23:12:33,278 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 23:12:33,278 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 23:12:33,278 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-02-15 23:12:33,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2023-02-15 23:12:33,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:33,282 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 23:12:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:33,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 23:12:33,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:33,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:33,536 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 23:12:33,537 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:33,574 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 129 states and 180 transitions. Complement of second has 7 states. [2023-02-15 23:12:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2023-02-15 23:12:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2023-02-15 23:12:33,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2023-02-15 23:12:33,578 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:33,578 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 23:12:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 23:12:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:33,763 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 23:12:33,763 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:33,795 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 129 states and 180 transitions. Complement of second has 7 states. [2023-02-15 23:12:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2023-02-15 23:12:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2023-02-15 23:12:33,796 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2023-02-15 23:12:33,797 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:33,797 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 23:12:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:33,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 23:12:33,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:33,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:33,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:34,006 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 23:12:34,006 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:34,069 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 157 states and 219 transitions. Complement of second has 13 states. [2023-02-15 23:12:34,070 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 [2023-02-15 23:12:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2023-02-15 23:12:34,071 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2023-02-15 23:12:34,072 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:34,072 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2023-02-15 23:12:34,072 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:34,073 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2023-02-15 23:12:34,073 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:34,073 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 219 transitions. [2023-02-15 23:12:34,074 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2023-02-15 23:12:34,077 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 139 states and 201 transitions. [2023-02-15 23:12:34,078 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2023-02-15 23:12:34,078 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 58 [2023-02-15 23:12:34,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 201 transitions. [2023-02-15 23:12:34,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 23:12:34,078 INFO L218 hiAutomatonCegarLoop]: Abstraction has 139 states and 201 transitions. [2023-02-15 23:12:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 201 transitions. [2023-02-15 23:12:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2023-02-15 23:12:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 75 states have internal predecessors, (79), 32 states have call successors, (32), 20 states have call predecessors, (32), 18 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2023-02-15 23:12:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2023-02-15 23:12:34,092 INFO L240 hiAutomatonCegarLoop]: Abstraction has 120 states and 170 transitions. [2023-02-15 23:12:34,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:12:34,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 23:12:34,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 23:12:34,093 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 23:12:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:12:34,135 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-02-15 23:12:34,135 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 98 states and 116 transitions. [2023-02-15 23:12:34,136 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2023-02-15 23:12:34,138 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 98 states to 63 states and 75 transitions. [2023-02-15 23:12:34,138 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2023-02-15 23:12:34,138 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2023-02-15 23:12:34,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 75 transitions. [2023-02-15 23:12:34,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 23:12:34,138 INFO L218 hiAutomatonCegarLoop]: Abstraction has 63 states and 75 transitions. [2023-02-15 23:12:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 75 transitions. [2023-02-15 23:12:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2023-02-15 23:12:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2023-02-15 23:12:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-02-15 23:12:34,143 INFO L240 hiAutomatonCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-02-15 23:12:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 23:12:34,144 INFO L428 stractBuchiCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-02-15 23:12:34,144 INFO L335 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2023-02-15 23:12:34,144 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 65 transitions. [2023-02-15 23:12:34,144 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2023-02-15 23:12:34,144 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 23:12:34,144 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 23:12:34,145 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:12:34,145 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 23:12:34,145 INFO L748 eck$LassoCheckResult]: Stem: 2809#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 2803#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 2779#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 2788#$Ultimate##0 ~j := #in~j; 2789#L18 assume !(~j <= 0); 2801#L20 call #t~ret3 := rec1(~j);< 2827#$Ultimate##0 ~i := #in~i; 2824#L12 assume !(~i <= 0); 2796#L14 call #t~ret0 := rec1(~i - 2);< 2826#$Ultimate##0 ~i := #in~i; 2831#L12 assume ~i <= 0;#res := 0; 2830#rec1FINAL assume true; 2805#rec1EXIT >#28#return; 2800#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2802#$Ultimate##0 ~i := #in~i; 2823#L12 assume ~i <= 0;#res := 0; 2822#rec1FINAL assume true; 2816#rec1EXIT >#30#return; 2814#L14-2 call #t~ret2 := rec1(#t~ret1);< 2799#$Ultimate##0 ~i := #in~i; 2818#L12 assume ~i <= 0;#res := 0; 2815#rec1FINAL assume true; 2813#rec1EXIT >#32#return; 2812#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 2811#rec1FINAL assume true; 2810#rec1EXIT >#34#return; 2778#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2780#$Ultimate##0 ~j := #in~j; 2791#L18 assume !(~j <= 0); 2784#L20 call #t~ret3 := rec1(~j);< 2781#$Ultimate##0 [2023-02-15 23:12:34,145 INFO L750 eck$LassoCheckResult]: Loop: 2781#$Ultimate##0 ~i := #in~i; 2783#L12 assume !(~i <= 0); 2782#L14 call #t~ret0 := rec1(~i - 2);< 2781#$Ultimate##0 [2023-02-15 23:12:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1256061253, now seen corresponding path program 2 times [2023-02-15 23:12:34,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:34,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411748084] [2023-02-15 23:12:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:34,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:34,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:12:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:34,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 23:12:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:34,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:12:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:34,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:12:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 23:12:34,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:12:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411748084] [2023-02-15 23:12:34,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411748084] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:12:34,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245599650] [2023-02-15 23:12:34,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:12:34,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:12:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:34,234 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 23:12:34,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-15 23:12:34,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:12:34,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:12:34,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:34,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 23:12:34,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:12:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 23:12:34,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245599650] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:12:34,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:12:34,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-02-15 23:12:34,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323916995] [2023-02-15 23:12:34,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:12:34,345 INFO L753 eck$LassoCheckResult]: stem already infeasible [2023-02-15 23:12:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 4 times [2023-02-15 23:12:34,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:12:34,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033567930] [2023-02-15 23:12:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:12:34,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:12:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:34,348 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 23:12:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 23:12:34,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 23:12:34,367 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:34,367 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:34,367 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:34,368 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:34,368 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 23:12:34,368 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:34,368 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:34,368 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:34,368 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2023-02-15 23:12:34,368 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:34,368 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:34,369 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,371 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,375 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,377 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,378 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,380 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,399 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:34,399 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 23:12:34,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:34,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:34,405 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:34,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2023-02-15 23:12:34,409 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:34,409 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:34,430 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 23:12:34,430 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 23:12:34,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2023-02-15 23:12:34,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:34,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:34,434 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:34,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2023-02-15 23:12:34,437 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 23:12:34,437 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:34,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:34,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:34,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:34,465 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:34,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2023-02-15 23:12:34,468 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 23:12:34,468 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 23:12:34,489 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 23:12:34,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:34,493 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 23:12:34,493 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 23:12:34,493 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 23:12:34,493 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 23:12:34,493 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 23:12:34,493 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:34,493 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 23:12:34,493 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 23:12:34,493 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2023-02-15 23:12:34,493 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 23:12:34,493 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 23:12:34,494 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,498 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,499 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,501 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,502 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,504 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 23:12:34,522 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 23:12:34,523 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 23:12:34,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:34,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:34,524 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:34,529 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 23:12:34,535 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 23:12:34,535 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 23:12:34,535 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 23:12:34,535 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 23:12:34,535 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 23:12:34,536 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 23:12:34,536 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 23:12:34,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2023-02-15 23:12:34,548 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 23:12:34,550 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-02-15 23:12:34,550 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 23:12:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 23:12:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:12:34,553 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 23:12:34,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2023-02-15 23:12:34,554 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 23:12:34,554 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 23:12:34,554 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 23:12:34,555 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-02-15 23:12:34,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Ended with exit code 0 [2023-02-15 23:12:34,558 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 23:12:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 23:12:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:34,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:34,754 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 23:12:34,754 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:34,796 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 64 states and 76 transitions. Complement of second has 13 states. [2023-02-15 23:12:34,796 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 [2023-02-15 23:12:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2023-02-15 23:12:34,797 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2023-02-15 23:12:34,797 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:34,797 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 23:12:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:34,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 23:12:34,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:34,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:34,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:34,972 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 23:12:34,972 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:35,007 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 64 states and 76 transitions. Complement of second has 13 states. [2023-02-15 23:12:35,009 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 [2023-02-15 23:12:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2023-02-15 23:12:35,009 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2023-02-15 23:12:35,009 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:35,009 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 23:12:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:12:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 23:12:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:12:35,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:12:35,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:12:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:12:35,182 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 23:12:35,182 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:35,235 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 78 states and 90 transitions. Complement of second has 13 states. [2023-02-15 23:12:35,236 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 [2023-02-15 23:12:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:12:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2023-02-15 23:12:35,236 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2023-02-15 23:12:35,237 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:35,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2023-02-15 23:12:35,237 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:35,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2023-02-15 23:12:35,237 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 23:12:35,237 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 78 states and 90 transitions. [2023-02-15 23:12:35,238 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-02-15 23:12:35,238 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 78 states to 0 states and 0 transitions. [2023-02-15 23:12:35,238 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-02-15 23:12:35,238 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-02-15 23:12:35,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-02-15 23:12:35,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-15 23:12:35,238 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 23:12:35,238 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 23:12:35,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:12:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 23:12:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 23:12:35,239 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 23:12:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:12:35,239 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2023-02-15 23:12:35,239 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2023-02-15 23:12:35,239 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-02-15 23:12:35,239 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2023-02-15 23:12:35,239 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-02-15 23:12:35,239 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-02-15 23:12:35,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-02-15 23:12:35,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-15 23:12:35,239 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 23:12:35,239 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 23:12:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 23:12:35,239 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 23:12:35,239 INFO L335 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2023-02-15 23:12:35,240 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-02-15 23:12:35,240 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-02-15 23:12:35,240 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-02-15 23:12:35,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.02 11:12:35 BoogieIcfgContainer [2023-02-15 23:12:35,246 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-02-15 23:12:35,247 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 23:12:35,247 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 23:12:35,247 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 23:12:35,248 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:12:29" (3/4) ... [2023-02-15 23:12:35,250 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-15 23:12:35,250 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 23:12:35,251 INFO L158 Benchmark]: Toolchain (without parser) took 6343.12ms. Allocated memory was 140.5MB in the beginning and 207.6MB in the end (delta: 67.1MB). Free memory was 84.2MB in the beginning and 78.5MB in the end (delta: 5.7MB). Peak memory consumption was 73.1MB. Max. memory is 16.1GB. [2023-02-15 23:12:35,251 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 140.5MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 23:12:35,251 INFO L158 Benchmark]: CACSL2BoogieTranslator took 140.02ms. Allocated memory is still 140.5MB. Free memory was 84.2MB in the beginning and 75.1MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 23:12:35,252 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.73ms. Allocated memory is still 140.5MB. Free memory was 75.1MB in the beginning and 73.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 23:12:35,252 INFO L158 Benchmark]: Boogie Preprocessor took 10.81ms. Allocated memory is still 140.5MB. Free memory was 73.7MB in the beginning and 73.0MB in the end (delta: 692.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 23:12:35,253 INFO L158 Benchmark]: RCFGBuilder took 187.34ms. Allocated memory was 140.5MB in the beginning and 172.0MB in the end (delta: 31.5MB). Free memory was 72.7MB in the beginning and 140.1MB in the end (delta: -67.4MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2023-02-15 23:12:35,253 INFO L158 Benchmark]: BuchiAutomizer took 5976.23ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 140.1MB in the beginning and 78.5MB in the end (delta: 61.6MB). Peak memory consumption was 96.7MB. Max. memory is 16.1GB. [2023-02-15 23:12:35,253 INFO L158 Benchmark]: Witness Printer took 3.09ms. Allocated memory is still 207.6MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 23:12:35,254 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 140.5MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 140.02ms. Allocated memory is still 140.5MB. Free memory was 84.2MB in the beginning and 75.1MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.73ms. Allocated memory is still 140.5MB. Free memory was 75.1MB in the beginning and 73.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 10.81ms. Allocated memory is still 140.5MB. Free memory was 73.7MB in the beginning and 73.0MB in the end (delta: 692.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 187.34ms. Allocated memory was 140.5MB in the beginning and 172.0MB in the end (delta: 31.5MB). Free memory was 72.7MB in the beginning and 140.1MB in the end (delta: -67.4MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * BuchiAutomizer took 5976.23ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 140.1MB in the beginning and 78.5MB in the end (delta: 61.6MB). Peak memory consumption was 96.7MB. Max. memory is 16.1GB. * Witness Printer took 3.09ms. Allocated memory is still 207.6MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.9s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 3.1s. Construction of modules took 0.2s. Büchi inclusion checks took 2.3s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 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 [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 221 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 198 mSDsluCounter, 504 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 305 mSDsCounter, 133 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 353 IncrementalHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 133 mSolverCounterUnsat, 199 mSDtfsCounter, 353 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq146 hnf94 smp100 dnf100 smp100 tf112 neg94 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 29ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-02-15 23:12:35,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:35,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-15 23:12:35,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 23:12:35,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE