./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b4d53423478efbe88c69a2c2de1bb984f61e7e586fd7bb6761452f26ace425f7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 09:18:58,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 09:18:58,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 09:18:58,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 09:18:58,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 09:18:58,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 09:18:58,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 09:18:58,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 09:18:58,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 09:18:58,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 09:18:58,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 09:18:58,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 09:18:58,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 09:18:58,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 09:18:58,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 09:18:58,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 09:18:58,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 09:18:58,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 09:18:58,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 09:18:58,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 09:18:58,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 09:18:58,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 09:18:58,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 09:18:58,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 09:18:58,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 09:18:58,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 09:18:58,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 09:18:58,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 09:18:58,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 09:18:58,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 09:18:58,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 09:18:58,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 09:18:58,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 09:18:58,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 09:18:58,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 09:18:58,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 09:18:58,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 09:18:58,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 09:18:58,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 09:18:58,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 09:18:58,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 09:18:58,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-16 09:18:58,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 09:18:58,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 09:18:58,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 09:18:58,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 09:18:58,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 09:18:58,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 09:18:58,938 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 09:18:58,938 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-16 09:18:58,939 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-16 09:18:58,939 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-16 09:18:58,939 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-16 09:18:58,939 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-16 09:18:58,939 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-16 09:18:58,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 09:18:58,939 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 09:18:58,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 09:18:58,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 09:18:58,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-16 09:18:58,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-16 09:18:58,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-16 09:18:58,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 09:18:58,941 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-16 09:18:58,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 09:18:58,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-16 09:18:58,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 09:18:58,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 09:18:58,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 09:18:58,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 09:18:58,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 09:18:58,942 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-16 09:18:58,942 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4d53423478efbe88c69a2c2de1bb984f61e7e586fd7bb6761452f26ace425f7 [2021-12-16 09:18:59,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 09:18:59,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 09:18:59,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 09:18:59,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 09:18:59,167 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 09:18:59,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2021-12-16 09:18:59,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3342889b/5099a98c14744ba38d6dcf4a5f82bb40/FLAGcd81fdafe [2021-12-16 09:18:59,606 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 09:18:59,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2021-12-16 09:18:59,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3342889b/5099a98c14744ba38d6dcf4a5f82bb40/FLAGcd81fdafe [2021-12-16 09:18:59,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3342889b/5099a98c14744ba38d6dcf4a5f82bb40 [2021-12-16 09:18:59,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 09:18:59,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 09:18:59,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 09:18:59,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 09:18:59,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 09:18:59,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f100ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59, skipping insertion in model container [2021-12-16 09:18:59,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 09:18:59,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 09:18:59,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:18:59,787 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 09:18:59,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:18:59,802 INFO L208 MainTranslator]: Completed translation [2021-12-16 09:18:59,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59 WrapperNode [2021-12-16 09:18:59,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 09:18:59,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 09:18:59,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 09:18:59,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 09:18:59,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,821 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2021-12-16 09:18:59,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 09:18:59,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 09:18:59,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 09:18:59,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 09:18:59,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 09:18:59,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 09:18:59,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 09:18:59,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 09:18:59,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (1/1) ... [2021-12-16 09:18:59,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:59,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:59,853 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) [2021-12-16 09:18:59,859 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 [2021-12-16 09:18:59,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 09:18:59,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 09:18:59,883 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2021-12-16 09:18:59,884 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2021-12-16 09:18:59,921 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 09:18:59,922 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 09:18:59,986 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 09:18:59,991 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 09:18:59,992 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 09:18:59,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:18:59 BoogieIcfgContainer [2021-12-16 09:18:59,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 09:18:59,994 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-16 09:18:59,994 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-16 09:18:59,997 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-16 09:18:59,998 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:18:59,998 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.12 09:18:59" (1/3) ... [2021-12-16 09:18:59,999 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3580b348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:18:59, skipping insertion in model container [2021-12-16 09:18:59,999 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:18:59,999 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:59" (2/3) ... [2021-12-16 09:19:00,000 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3580b348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:18:59, skipping insertion in model container [2021-12-16 09:19:00,000 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:19:00,000 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:18:59" (3/3) ... [2021-12-16 09:19:00,001 INFO L388 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion.c [2021-12-16 09:19:00,034 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-16 09:19:00,034 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-16 09:19:00,035 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-16 09:19:00,035 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-16 09:19:00,035 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-16 09:19:00,035 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-16 09:19:00,035 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-16 09:19:00,035 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-16 09:19:00,045 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 09:19:00,059 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:19:00,059 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:19:00,059 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:19:00,064 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 09:19:00,064 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-16 09:19:00,064 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-16 09:19:00,064 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 09:19:00,066 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:19:00,066 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:19:00,066 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:19:00,066 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 09:19:00,066 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-12-16 09:19:00,071 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 3#L16true call main_#t~ret3#1 := mc91(main_~x~0#1);< 7#mc91ENTRYtrue [2021-12-16 09:19:00,071 INFO L793 eck$LassoCheckResult]: Loop: 7#mc91ENTRYtrue ~n := #in~n; 11#L10true assume !(~n > 100); 12#L11true call #t~ret0 := mc91(11 + ~n);< 7#mc91ENTRYtrue [2021-12-16 09:19:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:19:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash 29870, now seen corresponding path program 1 times [2021-12-16 09:19:00,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:19:00,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324661326] [2021-12-16 09:19:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:19:00,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:19:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,142 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:19:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,168 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:19:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:19:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash 37870, now seen corresponding path program 1 times [2021-12-16 09:19:00,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:19:00,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233523900] [2021-12-16 09:19:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:19:00,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:19:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,194 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:19:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,202 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:19:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:19:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash 889865249, now seen corresponding path program 1 times [2021-12-16 09:19:00,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:19:00,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450746204] [2021-12-16 09:19:00,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:19:00,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:19:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,217 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:19:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,225 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:19:00,333 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:19:00,334 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:19:00,334 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:19:00,334 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:19:00,334 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:19:00,334 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:00,334 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:19:00,334 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:19:00,334 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2021-12-16 09:19:00,335 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:19:00,335 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:19:00,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,361 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,402 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:19:00,402 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:19:00,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:00,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:19:00,414 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) [2021-12-16 09:19:00,415 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 [2021-12-16 09:19:00,416 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:19:00,421 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:19:00,448 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 [2021-12-16 09:19:00,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:00,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:19:00,451 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) [2021-12-16 09:19:00,451 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 [2021-12-16 09:19:00,453 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:19:00,453 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:19:00,488 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:19:00,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-16 09:19:00,492 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:19:00,492 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:19:00,492 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:19:00,492 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:19:00,492 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:19:00,492 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:00,493 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:19:00,493 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:19:00,493 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2021-12-16 09:19:00,493 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:19:00,493 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:19:00,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,504 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:00,548 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:19:00,551 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:19:00,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:00,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:19:00,555 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) [2021-12-16 09:19:00,557 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 [2021-12-16 09:19:00,564 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 [2021-12-16 09:19:00,573 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:19:00,573 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:19:00,573 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:19:00,574 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:19:00,574 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:19:00,575 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:19:00,575 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:19:00,591 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:19:00,596 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 09:19:00,596 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-16 09:19:00,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:00,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:19:00,598 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) [2021-12-16 09:19:00,599 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 [2021-12-16 09:19:00,600 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:19:00,600 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:19:00,600 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:19:00,600 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2021-12-16 09:19:00,619 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 [2021-12-16 09:19:00,621 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:19:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:19:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:19:00,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:19:00,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:19:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:19:00,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 09:19:00,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:19:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:19:00,761 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-16 09:19:00,762 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:19:00,821 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 32 states and 39 transitions. Complement of second has 12 states. [2021-12-16 09:19:00,822 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 [2021-12-16 09:19:00,831 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) [2021-12-16 09:19:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-12-16 09:19:00,833 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2021-12-16 09:19:00,833 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:19:00,833 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2021-12-16 09:19:00,834 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:19:00,834 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2021-12-16 09:19:00,834 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:19:00,835 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2021-12-16 09:19:00,840 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:19:00,845 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 19 states and 25 transitions. [2021-12-16 09:19:00,846 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-12-16 09:19:00,847 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2021-12-16 09:19:00,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2021-12-16 09:19:00,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:19:00,848 INFO L681 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-12-16 09:19:00,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2021-12-16 09:19:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-12-16 09:19:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 09:19:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-12-16 09:19:00,867 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-12-16 09:19:00,867 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-12-16 09:19:00,867 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-16 09:19:00,867 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2021-12-16 09:19:00,868 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:19:00,868 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:19:00,868 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:19:00,869 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 09:19:00,869 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-16 09:19:00,869 INFO L791 eck$LassoCheckResult]: Stem: 108#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 109#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 103#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 105#mc91ENTRY ~n := #in~n; 110#L10 assume !(~n > 100); 102#L11 call #t~ret0 := mc91(11 + ~n);< 104#mc91ENTRY ~n := #in~n; 111#L10 assume ~n > 100;#res := ~n - 10; 106#mc91FINAL assume true; 107#mc91EXIT >#20#return; 100#L11-1 [2021-12-16 09:19:00,869 INFO L793 eck$LassoCheckResult]: Loop: 100#L11-1 call #t~ret1 := mc91(#t~ret0);< 101#mc91ENTRY ~n := #in~n; 114#L10 assume !(~n > 100); 99#L11 call #t~ret0 := mc91(11 + ~n);< 101#mc91ENTRY ~n := #in~n; 114#L10 assume ~n > 100;#res := ~n - 10; 113#mc91FINAL assume true; 115#mc91EXIT >#20#return; 100#L11-1 [2021-12-16 09:19:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:19:00,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1612519912, now seen corresponding path program 1 times [2021-12-16 09:19:00,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:19:00,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629634263] [2021-12-16 09:19:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:19:00,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:19:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,875 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:19:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,880 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:19:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:19:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -696734814, now seen corresponding path program 1 times [2021-12-16 09:19:00,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:19:00,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866118209] [2021-12-16 09:19:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:19:00,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:19:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,895 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:19:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,904 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:19:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:19:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1110240905, now seen corresponding path program 1 times [2021-12-16 09:19:00,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:19:00,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305040628] [2021-12-16 09:19:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:19:00,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:19:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,922 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:19:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:19:00,936 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:19:01,030 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:19:01,031 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:19:01,031 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:19:01,031 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:19:01,031 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:19:01,031 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:01,031 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:19:01,031 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:19:01,031 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2021-12-16 09:19:01,032 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:19:01,032 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:19:01,032 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:01,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:01,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:19:01,066 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:19:01,066 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:19:01,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:01,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:19:01,067 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) [2021-12-16 09:19:01,068 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 [2021-12-16 09:19:01,069 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:19:01,069 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:19:01,091 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:19:01,091 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 09:19:01,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-12-16 09:19:01,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:01,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:19:01,140 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) [2021-12-16 09:19:01,143 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 [2021-12-16 09:19:01,150 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:19:01,150 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:19:01,172 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-16 09:19:01,172 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-16 09:19:01,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-12-16 09:19:01,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:01,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:19:01,196 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) [2021-12-16 09:19:01,196 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 [2021-12-16 09:19:01,198 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:19:01,198 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:19:01,242 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 [2021-12-16 09:19:01,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:19:01,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:19:01,243 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) [2021-12-16 09:19:01,243 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 [2021-12-16 09:19:01,245 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:19:01,245 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:19:27,456 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