./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.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 f5c626d5135dc189cbc332c41f07b76804a58f47ee910790099695b0d83f1587 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 14:12:31,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 14:12:31,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 14:12:31,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 14:12:31,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 14:12:31,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 14:12:31,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 14:12:31,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 14:12:31,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 14:12:31,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 14:12:31,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 14:12:31,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 14:12:31,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 14:12:31,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 14:12:31,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 14:12:31,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 14:12:31,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 14:12:31,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 14:12:31,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 14:12:31,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 14:12:31,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 14:12:31,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 14:12:31,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 14:12:31,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 14:12:31,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 14:12:31,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 14:12:31,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 14:12:31,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 14:12:31,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 14:12:31,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 14:12:31,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 14:12:31,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 14:12:31,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 14:12:31,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 14:12:31,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 14:12:31,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 14:12:31,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 14:12:31,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 14:12:31,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 14:12:31,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 14:12:31,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 14:12:31,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-02-15 14:12:31,387 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 14:12:31,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 14:12:31,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 14:12:31,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 14:12:31,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 14:12:31,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 14:12:31,389 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 14:12:31,389 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-02-15 14:12:31,389 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-02-15 14:12:31,389 INFO L138 SettingsManager]: * Use old map elimination=false [2023-02-15 14:12:31,390 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2023-02-15 14:12:31,390 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2023-02-15 14:12:31,390 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-02-15 14:12:31,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 14:12:31,390 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 14:12:31,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 14:12:31,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 14:12:31,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-02-15 14:12:31,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-02-15 14:12:31,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-02-15 14:12:31,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 14:12:31,391 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-02-15 14:12:31,391 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 14:12:31,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-02-15 14:12:31,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 14:12:31,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 14:12:31,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 14:12:31,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 14:12:31,393 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-02-15 14:12:31,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5c626d5135dc189cbc332c41f07b76804a58f47ee910790099695b0d83f1587 [2023-02-15 14:12:31,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 14:12:31,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 14:12:31,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 14:12:31,597 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 14:12:31,597 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 14:12:31,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2023-02-15 14:12:32,527 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 14:12:32,712 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 14:12:32,713 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2023-02-15 14:12:32,733 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2910b8643/83be74c27b9342889934956c4c32ca6e/FLAG42d204878 [2023-02-15 14:12:32,764 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2910b8643/83be74c27b9342889934956c4c32ca6e [2023-02-15 14:12:32,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 14:12:32,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 14:12:32,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 14:12:32,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 14:12:32,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 14:12:32,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317c51f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32, skipping insertion in model container [2023-02-15 14:12:32,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 14:12:32,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 14:12:32,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 14:12:32,910 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 14:12:32,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 14:12:32,928 INFO L208 MainTranslator]: Completed translation [2023-02-15 14:12:32,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32 WrapperNode [2023-02-15 14:12:32,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 14:12:32,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 14:12:32,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 14:12:32,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 14:12:32,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,947 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2023-02-15 14:12:32,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 14:12:32,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 14:12:32,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 14:12:32,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 14:12:32,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 14:12:32,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 14:12:32,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 14:12:32,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 14:12:32,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (1/1) ... [2023-02-15 14:12:32,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:32,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:32,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-02-15 14:12:33,027 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2023-02-15 14:12:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2023-02-15 14:12:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2023-02-15 14:12:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2023-02-15 14:12:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 14:12:33,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 14:12:33,065 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 14:12:33,068 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 14:12:33,159 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 14:12:33,165 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 14:12:33,166 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 14:12:33,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:12:33 BoogieIcfgContainer [2023-02-15 14:12:33,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 14:12:33,168 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-02-15 14:12:33,169 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2023-02-15 14:12:33,171 INFO L275 PluginConnector]: BuchiAutomizer initialized [2023-02-15 14:12:33,171 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:12:33,172 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.02 02:12:32" (1/3) ... [2023-02-15 14:12:33,172 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3cc6cb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:12:33, skipping insertion in model container [2023-02-15 14:12:33,172 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:12:33,173 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:12:32" (2/3) ... [2023-02-15 14:12:33,173 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3cc6cb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:12:33, skipping insertion in model container [2023-02-15 14:12:33,173 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:12:33,173 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:12:33" (3/3) ... [2023-02-15 14:12:33,174 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c.c [2023-02-15 14:12:33,222 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-02-15 14:12:33,223 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-02-15 14:12:33,223 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-02-15 14:12:33,223 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-02-15 14:12:33,223 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-02-15 14:12:33,223 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-02-15 14:12:33,223 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-02-15 14:12:33,223 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-02-15 14:12:33,228 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 14:12:33,245 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2023-02-15 14:12:33,246 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:33,246 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:33,250 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-02-15 14:12:33,250 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 14:12:33,250 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-02-15 14:12:33,250 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 14:12:33,252 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2023-02-15 14:12:33,252 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:33,253 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:33,253 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2023-02-15 14:12:33,253 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 14:12:33,258 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 14:12:33,259 INFO L750 eck$LassoCheckResult]: Loop: 7#$Ultimate##0true ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec2(~j - 1);< 7#$Ultimate##0true [2023-02-15 14:12:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:33,263 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2023-02-15 14:12:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:33,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940499406] [2023-02-15 14:12:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:33,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:33,312 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:33,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:33,327 INFO L85 PathProgramCache]: Analyzing trace with hash 39868, now seen corresponding path program 1 times [2023-02-15 14:12:33,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:33,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643083628] [2023-02-15 14:12:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:33,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:33,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:33,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:33,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1451963835, now seen corresponding path program 1 times [2023-02-15 14:12:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:33,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166163515] [2023-02-15 14:12:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:33,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:33,361 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:33,366 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:33,475 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:33,475 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:33,475 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:33,475 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:33,475 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:12:33,476 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,488 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:33,489 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:33,489 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2023-02-15 14:12:33,489 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:33,489 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:33,509 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,523 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,525 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,527 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,530 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,566 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:33,567 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:12:33,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-02-15 14:12:33,573 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:33,573 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:33,583 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:33,584 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 14:12:33,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:33,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2023-02-15 14:12:33,603 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:33,603 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:33,625 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:33,625 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 14:12:33,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2023-02-15 14:12:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2023-02-15 14:12:33,633 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:33,633 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:33,650 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:33,650 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2023-02-15 14:12:33,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2023-02-15 14:12:33,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2023-02-15 14:12:33,660 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:33,660 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:33,667 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:33,667 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 14:12:33,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:33,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2023-02-15 14:12:33,675 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:33,675 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:33,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2023-02-15 14:12:33,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2023-02-15 14:12:33,698 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:12:33,698 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:33,746 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 14:12:33,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:33,752 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:33,752 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:33,752 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:33,752 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:33,752 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:12:33,752 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,752 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:33,752 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:33,752 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2023-02-15 14:12:33,752 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:33,752 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:33,753 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,756 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,758 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,763 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,765 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:33,788 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:33,791 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:12:33,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,793 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2023-02-15 14:12:33,797 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 14:12:33,803 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:33,803 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:33,803 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:33,803 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:33,803 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:33,805 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:33,805 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:33,819 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:12:33,822 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 14:12:33,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2023-02-15 14:12:33,827 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 14:12:33,832 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:33,833 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:33,833 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:33,833 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:33,833 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:33,834 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:33,834 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:33,846 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:12:33,851 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 14:12:33,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,852 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2023-02-15 14:12:33,856 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 14:12:33,861 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:33,861 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:33,861 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:33,862 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:33,862 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:33,863 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:33,863 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:33,879 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:12:33,884 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2023-02-15 14:12:33,884 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2023-02-15 14:12:33,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:33,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:33,935 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:33,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2023-02-15 14:12:33,937 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:12:33,937 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:12:33,937 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:12:33,938 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2023-02-15 14:12:33,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:33,944 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:12:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 14:12:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:12:33,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:34,029 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2023-02-15 14:12:34,031 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:12:34,101 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 37 states and 45 transitions. Complement of second has 12 states. [2023-02-15 14:12:34,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2023-02-15 14:12:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:12:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2023-02-15 14:12:34,114 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2023-02-15 14:12:34,115 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:34,115 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2023-02-15 14:12:34,115 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:34,115 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2023-02-15 14:12:34,116 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:34,116 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 45 transitions. [2023-02-15 14:12:34,122 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-02-15 14:12:34,128 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 24 states and 31 transitions. [2023-02-15 14:12:34,128 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2023-02-15 14:12:34,129 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2023-02-15 14:12:34,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 31 transitions. [2023-02-15 14:12:34,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:34,130 INFO L218 hiAutomatonCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-02-15 14:12:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 31 transitions. [2023-02-15 14:12:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2023-02-15 14:12:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 14:12:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-02-15 14:12:34,152 INFO L240 hiAutomatonCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-02-15 14:12:34,152 INFO L428 stractBuchiCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-02-15 14:12:34,152 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2023-02-15 14:12:34,152 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 25 transitions. [2023-02-15 14:12:34,153 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-02-15 14:12:34,153 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:34,154 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:34,154 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 14:12:34,159 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 14:12:34,159 INFO L748 eck$LassoCheckResult]: Stem: 130#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 128#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 113#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 121#$Ultimate##0 ~j := #in~j; 122#L18 assume !(~j <= 0); 112#L20 call #t~ret3 := rec2(~j - 1);< 123#$Ultimate##0 ~j := #in~j; 124#L18 assume ~j <= 0;#res := 0; 120#rec2FINAL assume true; 119#rec2EXIT >#34#return; 111#L20-1 call #t~ret4 := rec1(#t~ret3);< 114#$Ultimate##0 [2023-02-15 14:12:34,159 INFO L750 eck$LassoCheckResult]: Loop: 114#$Ultimate##0 ~i := #in~i; 118#L12 assume !(~i <= 0); 115#L14 call #t~ret0 := rec1(~i - 2);< 114#$Ultimate##0 [2023-02-15 14:12:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1193590059, now seen corresponding path program 1 times [2023-02-15 14:12:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:34,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882854597] [2023-02-15 14:12:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:34,175 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:34,185 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2023-02-15 14:12:34,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:34,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026936326] [2023-02-15 14:12:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:34,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:34,192 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:34,197 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:34,197 INFO L85 PathProgramCache]: Analyzing trace with hash -207203934, now seen corresponding path program 1 times [2023-02-15 14:12:34,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:34,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189864023] [2023-02-15 14:12:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:34,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:34,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 14:12:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 14:12:34,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:12:34,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189864023] [2023-02-15 14:12:34,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189864023] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 14:12:34,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 14:12:34,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 14:12:34,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827273519] [2023-02-15 14:12:34,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 14:12:34,340 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:34,340 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:34,340 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:34,340 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:34,340 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:12:34,340 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:34,340 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:34,340 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:34,340 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2023-02-15 14:12:34,341 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:34,341 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:34,342 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,344 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,350 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,352 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,354 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,355 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,380 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:34,380 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:12:34,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:34,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:34,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:34,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2023-02-15 14:12:34,398 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:34,398 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:34,421 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:34,421 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 14:12:34,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:34,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:34,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:34,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2023-02-15 14:12:34,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:34,443 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:34,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:34,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:34,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:34,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2023-02-15 14:12:34,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:12:34,498 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:34,548 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 14:12:34,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:34,553 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:34,553 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:34,553 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:34,553 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:34,553 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:12:34,553 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:34,553 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:34,553 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:34,553 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2023-02-15 14:12:34,553 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:34,553 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:34,554 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,559 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,560 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,562 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,564 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,566 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:34,588 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:34,588 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:12:34,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:34,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:34,589 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:34,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2023-02-15 14:12:34,608 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 14:12:34,614 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:34,614 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:34,614 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:34,614 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:34,614 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:34,615 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:34,615 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:34,631 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:12:34,632 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-02-15 14:12:34,632 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 14:12:34,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:34,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:34,637 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 14:12:34,639 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 14:12:34,640 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:12:34,640 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:12:34,640 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:12:34,640 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-02-15 14:12:34,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2023-02-15 14:12:34,644 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:12:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:34,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 14:12:34,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:34,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:12:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:34,778 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 14:12:34,778 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states and 25 transitions. cyclomatic complexity: 7 Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:34,856 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states and 25 transitions. cyclomatic complexity: 7. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 44 states and 59 transitions. Complement of second has 14 states. [2023-02-15 14:12:34,856 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 14:12:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2023-02-15 14:12:34,858 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 11 letters. Loop has 3 letters. [2023-02-15 14:12:34,858 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:34,858 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 14 letters. Loop has 3 letters. [2023-02-15 14:12:34,858 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:34,858 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 11 letters. Loop has 6 letters. [2023-02-15 14:12:34,858 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:34,859 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 59 transitions. [2023-02-15 14:12:34,860 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-02-15 14:12:34,861 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 38 states and 51 transitions. [2023-02-15 14:12:34,861 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2023-02-15 14:12:34,862 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2023-02-15 14:12:34,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 51 transitions. [2023-02-15 14:12:34,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:34,862 INFO L218 hiAutomatonCegarLoop]: Abstraction has 38 states and 51 transitions. [2023-02-15 14:12:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 51 transitions. [2023-02-15 14:12:34,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-02-15 14:12:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-02-15 14:12:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-02-15 14:12:34,868 INFO L240 hiAutomatonCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-02-15 14:12:34,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:12:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 14:12:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 14:12:34,873 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 14:12:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:12:34,916 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-02-15 14:12:34,916 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 44 transitions. [2023-02-15 14:12:34,920 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-02-15 14:12:34,922 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 32 states and 41 transitions. [2023-02-15 14:12:34,922 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 27 [2023-02-15 14:12:34,923 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2023-02-15 14:12:34,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 41 transitions. [2023-02-15 14:12:34,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:34,924 INFO L218 hiAutomatonCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-02-15 14:12:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states and 41 transitions. [2023-02-15 14:12:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-02-15 14:12:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 14:12:34,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-15 14:12:34,933 INFO L240 hiAutomatonCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-15 14:12:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 14:12:34,935 INFO L428 stractBuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-15 14:12:34,935 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2023-02-15 14:12:34,935 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 35 transitions. [2023-02-15 14:12:34,937 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-02-15 14:12:34,937 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:12:34,937 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:12:34,939 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 14:12:34,939 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 14:12:34,940 INFO L748 eck$LassoCheckResult]: Stem: 360#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 355#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 346#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 345#$Ultimate##0 ~j := #in~j; 347#L18 assume !(~j <= 0); 334#L20 call #t~ret3 := rec2(~j - 1);< 348#$Ultimate##0 ~j := #in~j; 349#L18 assume !(~j <= 0); 335#L20 call #t~ret3 := rec2(~j - 1);< 348#$Ultimate##0 ~j := #in~j; 350#L18 assume ~j <= 0;#res := 0; 344#rec2FINAL assume true; 343#rec2EXIT >#34#return; 333#L20-1 call #t~ret4 := rec1(#t~ret3);< 336#$Ultimate##0 ~i := #in~i; 358#L12 assume ~i <= 0;#res := 0; 359#rec1FINAL assume true; 357#rec1EXIT >#36#return; 351#L20-2 #res := #t~ret4 - 1;havoc #t~ret3;havoc #t~ret4; 352#rec2FINAL assume true; 361#rec2EXIT >#34#return; 338#L20-1 call #t~ret4 := rec1(#t~ret3);< 337#$Ultimate##0 [2023-02-15 14:12:34,940 INFO L750 eck$LassoCheckResult]: Loop: 337#$Ultimate##0 ~i := #in~i; 342#L12 assume !(~i <= 0); 339#L14 call #t~ret0 := rec1(~i - 2);< 337#$Ultimate##0 [2023-02-15 14:12:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:34,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1665524430, now seen corresponding path program 1 times [2023-02-15 14:12:34,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:34,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496692372] [2023-02-15 14:12:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:34,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:34,961 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:34,972 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:34,973 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2023-02-15 14:12:34,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:34,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828566218] [2023-02-15 14:12:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:34,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:34,976 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:12:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:12:34,980 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:12:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2118876407, now seen corresponding path program 1 times [2023-02-15 14:12:34,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:12:34,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109408064] [2023-02-15 14:12:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:12:34,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:12:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:35,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 14:12:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:35,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 14:12:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:35,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 14:12:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 14:12:35,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 14:12:35,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109408064] [2023-02-15 14:12:35,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109408064] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 14:12:35,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 14:12:35,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 14:12:35,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414704685] [2023-02-15 14:12:35,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 14:12:35,133 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:35,133 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:35,133 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:35,133 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:35,133 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2023-02-15 14:12:35,133 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,133 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:35,134 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:35,134 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2023-02-15 14:12:35,134 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:35,134 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:35,134 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,136 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,137 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,139 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,141 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 14:12:35,142 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,165 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:35,165 INFO L404 LassoAnalysis]: Checking for nontermination... [2023-02-15 14:12:35,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,166 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2023-02-15 14:12:35,192 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:35,192 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:35,209 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:35,209 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 14:12:35,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:35,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,225 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,251 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:35,251 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:35,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2023-02-15 14:12:35,269 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:35,269 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 14:12:35,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:35,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,274 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2023-02-15 14:12:35,284 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:35,284 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:35,294 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:35,294 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 14:12:35,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2023-02-15 14:12:35,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,302 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2023-02-15 14:12:35,305 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:35,305 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:35,324 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:35,324 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 14:12:35,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2023-02-15 14:12:35,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,329 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 14:12:35,333 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 14:12:35,335 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:35,335 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:35,342 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2023-02-15 14:12:35,343 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 14:12:35,345 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 14:12:35,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,346 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2023-02-15 14:12:35,349 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2023-02-15 14:12:35,349 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:35,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:35,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,404 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2023-02-15 14:12:35,408 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2023-02-15 14:12:35,408 INFO L160 nArgumentSynthesizer]: Using integer mode. [2023-02-15 14:12:35,451 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2023-02-15 14:12:35,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:35,455 INFO L210 LassoAnalysis]: Preferences: [2023-02-15 14:12:35,455 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2023-02-15 14:12:35,455 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2023-02-15 14:12:35,455 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2023-02-15 14:12:35,455 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2023-02-15 14:12:35,455 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,455 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2023-02-15 14:12:35,455 INFO L132 ssoRankerPreferences]: Path of dumped script: [2023-02-15 14:12:35,456 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2023-02-15 14:12:35,456 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2023-02-15 14:12:35,456 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2023-02-15 14:12:35,456 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,463 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,465 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,467 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,468 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,474 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2023-02-15 14:12:35,495 INFO L294 LassoAnalysis]: Preprocessing complete. [2023-02-15 14:12:35,495 INFO L490 LassoAnalysis]: Using template 'affine'. [2023-02-15 14:12:35,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,497 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,520 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 14:12:35,526 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:35,526 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:35,526 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:35,527 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:35,527 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:35,527 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:35,527 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:35,538 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:12:35,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2023-02-15 14:12:35,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:35,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,541 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 14:12:35,542 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2023-02-15 14:12:35,545 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 14:12:35,551 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:35,552 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:35,552 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:35,552 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:35,552 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:35,552 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:35,553 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:35,569 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:12:35,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:35,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,573 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2023-02-15 14:12:35,576 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 14:12:35,582 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:35,583 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:35,583 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:35,583 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:35,583 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:35,583 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:35,583 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:35,596 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:12:35,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:35,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,614 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-02-15 14:12:35,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2023-02-15 14:12:35,633 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 14:12:35,639 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:35,639 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:35,639 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:35,640 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:35,640 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:35,640 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:35,640 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:35,655 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2023-02-15 14:12:35,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:35,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,677 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 14:12:35,693 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 14:12:35,741 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2023-02-15 14:12:35,748 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2023-02-15 14:12:35,748 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2023-02-15 14:12:35,748 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2023-02-15 14:12:35,748 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2023-02-15 14:12:35,748 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2023-02-15 14:12:35,749 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2023-02-15 14:12:35,749 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2023-02-15 14:12:35,763 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2023-02-15 14:12:35,765 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2023-02-15 14:12:35,765 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2023-02-15 14:12:35,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:12:35,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:12:35,766 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 14:12:35,768 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 14:12:35,769 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2023-02-15 14:12:35,769 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2023-02-15 14:12:35,769 INFO L513 LassoAnalysis]: Proved termination. [2023-02-15 14:12:35,769 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2023-02-15 14:12:35,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2023-02-15 14:12:35,777 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2023-02-15 14:12:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:35,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 14:12:35,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:35,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:12:35,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:36,000 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 14:12:36,001 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 14:12:36,038 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 32 states and 38 transitions. Complement of second has 7 states. [2023-02-15 14:12:36,038 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 14:12:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 14:12:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2023-02-15 14:12:36,039 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 22 letters. Loop has 3 letters. [2023-02-15 14:12:36,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:36,040 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:12:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:36,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 14:12:36,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:12:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:36,201 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 14:12:36,201 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 14:12:36,237 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 32 states and 38 transitions. Complement of second has 7 states. [2023-02-15 14:12:36,238 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 14:12:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 14:12:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2023-02-15 14:12:36,239 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 22 letters. Loop has 3 letters. [2023-02-15 14:12:36,239 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:36,239 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2023-02-15 14:12:36,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:12:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:36,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 14:12:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 14:12:36,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 14:12:36,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 14:12:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 14:12:36,398 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2023-02-15 14:12:36,398 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8 Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 14:12:36,466 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 35 transitions. cyclomatic complexity: 8. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 54 states and 66 transitions. Complement of second has 13 states. [2023-02-15 14:12:36,466 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 14:12:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 14:12:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 29 transitions. [2023-02-15 14:12:36,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 22 letters. Loop has 3 letters. [2023-02-15 14:12:36,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:36,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 25 letters. Loop has 3 letters. [2023-02-15 14:12:36,468 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:36,468 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 22 letters. Loop has 6 letters. [2023-02-15 14:12:36,468 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2023-02-15 14:12:36,468 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 66 transitions. [2023-02-15 14:12:36,469 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2023-02-15 14:12:36,470 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 42 states and 53 transitions. [2023-02-15 14:12:36,470 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2023-02-15 14:12:36,470 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 32 [2023-02-15 14:12:36,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 53 transitions. [2023-02-15 14:12:36,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2023-02-15 14:12:36,471 INFO L218 hiAutomatonCegarLoop]: Abstraction has 42 states and 53 transitions. [2023-02-15 14:12:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 53 transitions. [2023-02-15 14:12:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2023-02-15 14:12:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2023-02-15 14:12:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-02-15 14:12:36,473 INFO L240 hiAutomatonCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-02-15 14:12:36,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 14:12:36,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 14:12:36,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 14:12:36,474 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 14:12:36,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 14:12:36,515 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-02-15 14:12:36,516 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 30 transitions. [2023-02-15 14:12:36,516 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-02-15 14:12:36,516 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 0 states and 0 transitions. [2023-02-15 14:12:36,516 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2023-02-15 14:12:36,516 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2023-02-15 14:12:36,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2023-02-15 14:12:36,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-02-15 14:12:36,517 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 14:12:36,517 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 14:12:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 14:12:36,518 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 14:12:36,518 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2023-02-15 14:12:36,518 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2023-02-15 14:12:36,518 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2023-02-15 14:12:36,518 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2023-02-15 14:12:36,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.02 02:12:36 BoogieIcfgContainer [2023-02-15 14:12:36,523 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-02-15 14:12:36,524 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 14:12:36,524 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 14:12:36,524 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 14:12:36,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:12:33" (3/4) ... [2023-02-15 14:12:36,526 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-15 14:12:36,526 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 14:12:36,527 INFO L158 Benchmark]: Toolchain (without parser) took 3757.14ms. Allocated memory was 169.9MB in the beginning and 205.5MB in the end (delta: 35.7MB). Free memory was 141.0MB in the beginning and 87.5MB in the end (delta: 53.5MB). Peak memory consumption was 89.1MB. Max. memory is 16.1GB. [2023-02-15 14:12:36,527 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 130.0MB. Free memory is still 97.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:12:36,527 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.21ms. Allocated memory is still 169.9MB. Free memory was 141.0MB in the beginning and 131.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 14:12:36,528 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.02ms. Allocated memory is still 169.9MB. Free memory was 131.2MB in the beginning and 129.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 14:12:36,528 INFO L158 Benchmark]: Boogie Preprocessor took 11.25ms. Allocated memory is still 169.9MB. Free memory was 129.7MB in the beginning and 129.1MB in the end (delta: 653.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:12:36,528 INFO L158 Benchmark]: RCFGBuilder took 205.45ms. Allocated memory is still 169.9MB. Free memory was 129.1MB in the beginning and 119.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 14:12:36,528 INFO L158 Benchmark]: BuchiAutomizer took 3354.98ms. Allocated memory was 169.9MB in the beginning and 205.5MB in the end (delta: 35.7MB). Free memory was 119.4MB in the beginning and 88.4MB in the end (delta: 31.0MB). Peak memory consumption was 68.2MB. Max. memory is 16.1GB. [2023-02-15 14:12:36,528 INFO L158 Benchmark]: Witness Printer took 2.66ms. Allocated memory is still 205.5MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:12:36,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 130.0MB. Free memory is still 97.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.21ms. Allocated memory is still 169.9MB. Free memory was 141.0MB in the beginning and 131.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.02ms. Allocated memory is still 169.9MB. Free memory was 131.2MB in the beginning and 129.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.25ms. Allocated memory is still 169.9MB. Free memory was 129.7MB in the beginning and 129.1MB in the end (delta: 653.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 205.45ms. Allocated memory is still 169.9MB. Free memory was 129.1MB in the beginning and 119.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 3354.98ms. Allocated memory was 169.9MB in the beginning and 205.5MB in the end (delta: 35.7MB). Free memory was 119.4MB in the beginning and 88.4MB in the end (delta: 31.0MB). Peak memory consumption was 68.2MB. Max. memory is 16.1GB. * Witness Printer took 2.66ms. Allocated memory is still 205.5MB. Free memory is still 87.5MB. 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 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(j) 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. 2 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.3s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 2.0s. Construction of modules took 0.1s. Büchi inclusion checks took 1.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 100 mSDsluCounter, 265 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 171 mSDsCounter, 48 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 141 IncrementalHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 48 mSolverCounterUnsat, 94 mSDtfsCounter, 141 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq146 hnf100 smp100 dnf94 smp100 tf111 neg94 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 26ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2023-02-15 14:12:36,538 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 14:12:36,741 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