./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/GCD2.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-restricted-15/GCD2.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 35227298135ad932045d20354d3c27230a951768ba1221004cc62379288111ba --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 14:15:19,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 14:15:19,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 14:15:19,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 14:15:19,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 14:15:19,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 14:15:19,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 14:15:19,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 14:15:19,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 14:15:19,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 14:15:19,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 14:15:19,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 14:15:19,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 14:15:19,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 14:15:19,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 14:15:19,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 14:15:19,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 14:15:19,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 14:15:19,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 14:15:19,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 14:15:19,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 14:15:19,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 14:15:19,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 14:15:19,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 14:15:19,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 14:15:19,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 14:15:19,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 14:15:19,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 14:15:19,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 14:15:19,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 14:15:19,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 14:15:19,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 14:15:19,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 14:15:19,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 14:15:19,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 14:15:19,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 14:15:19,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 14:15:19,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 14:15:19,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 14:15:19,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 14:15:19,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 14:15:19,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-02-15 14:15:19,668 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 14:15:19,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 14:15:19,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 14:15:19,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 14:15:19,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 14:15:19,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 14:15:19,670 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 14:15:19,670 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-02-15 14:15:19,670 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-02-15 14:15:19,670 INFO L138 SettingsManager]: * Use old map elimination=false [2023-02-15 14:15:19,671 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2023-02-15 14:15:19,671 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2023-02-15 14:15:19,671 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-02-15 14:15:19,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 14:15:19,671 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 14:15:19,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 14:15:19,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 14:15:19,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-02-15 14:15:19,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-02-15 14:15:19,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-02-15 14:15:19,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 14:15:19,672 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-02-15 14:15:19,672 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 14:15:19,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-02-15 14:15:19,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 14:15:19,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 14:15:19,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 14:15:19,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 14:15:19,674 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-02-15 14:15:19,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35227298135ad932045d20354d3c27230a951768ba1221004cc62379288111ba [2023-02-15 14:15:19,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 14:15:19,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 14:15:19,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 14:15:19,860 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 14:15:19,860 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 14:15:19,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/GCD2.c [2023-02-15 14:15:20,785 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 14:15:20,910 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 14:15:20,910 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/GCD2.c [2023-02-15 14:15:20,914 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9da1bedc/320bcfda7a954a9a86d8011dfb402bab/FLAGfad4b016e [2023-02-15 14:15:20,926 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9da1bedc/320bcfda7a954a9a86d8011dfb402bab [2023-02-15 14:15:20,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 14:15:20,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 14:15:20,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 14:15:20,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 14:15:20,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 14:15:20,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:15:20" (1/1) ... [2023-02-15 14:15:20,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66579a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:20, skipping insertion in model container [2023-02-15 14:15:20,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:15:20" (1/1) ... [2023-02-15 14:15:20,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 14:15:20,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 14:15:21,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 14:15:21,052 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 14:15:21,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 14:15:21,070 INFO L208 MainTranslator]: Completed translation [2023-02-15 14:15:21,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21 WrapperNode [2023-02-15 14:15:21,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 14:15:21,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 14:15:21,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 14:15:21,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 14:15:21,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,092 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-02-15 14:15:21,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 14:15:21,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 14:15:21,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 14:15:21,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 14:15:21,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 14:15:21,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 14:15:21,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 14:15:21,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 14:15:21,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (1/1) ... [2023-02-15 14:15:21,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 14:15:21,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 14:15:21,138 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 14:15:21,144 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 14:15:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 14:15:21,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 14:15:21,218 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 14:15:21,221 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 14:15:21,302 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 14:15:21,308 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 14:15:21,308 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 14:15:21,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:15:21 BoogieIcfgContainer [2023-02-15 14:15:21,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 14:15:21,311 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-02-15 14:15:21,311 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2023-02-15 14:15:21,314 INFO L275 PluginConnector]: BuchiAutomizer initialized [2023-02-15 14:15:21,315 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:15:21,315 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.02 02:15:20" (1/3) ... [2023-02-15 14:15:21,316 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@40107b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:15:21, skipping insertion in model container [2023-02-15 14:15:21,316 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:15:21,316 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:15:21" (2/3) ... [2023-02-15 14:15:21,317 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@40107b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:15:21, skipping insertion in model container [2023-02-15 14:15:21,317 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 14:15:21,317 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:15:21" (3/3) ... [2023-02-15 14:15:21,318 INFO L332 chiAutomizerObserver]: Analyzing ICFG GCD2.c [2023-02-15 14:15:21,383 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-02-15 14:15:21,384 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-02-15 14:15:21,384 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-02-15 14:15:21,384 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-02-15 14:15:21,384 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-02-15 14:15:21,384 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-02-15 14:15:21,384 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-02-15 14:15:21,384 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-02-15 14:15:21,388 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:21,401 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-15 14:15:21,401 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:21,401 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:21,405 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-15 14:15:21,405 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 14:15:21,405 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-02-15 14:15:21,405 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 14:15:21,407 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-15 14:15:21,407 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 14:15:21,407 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 14:15:21,408 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-15 14:15:21,408 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 14:15:21,413 INFO L748 eck$LassoCheckResult]: Stem: 7#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1, main_~tmp~0#1, main_~xtmp~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~tmp~0#1;havoc main_~xtmp~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 6#L13-2true [2023-02-15 14:15:21,415 INFO L750 eck$LassoCheckResult]: Loop: 6#L13-2true assume !!((0 != main_~y~0#1 && main_~x~0#1 >= 0) && main_~y~0#1 >= 0);main_~tmp~0#1 := main_~y~0#1;main_~xtmp~0#1 := main_~x~0#1; 3#L17true assume main_~x~0#1 == main_~y~0#1;main_~y~0#1 := 0; 4#L21-3true main_~y~0#1 := main_~xtmp~0#1;main_~x~0#1 := main_~tmp~0#1; 6#L13-2true [2023-02-15 14:15:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2023-02-15 14:15:21,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:21,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397852996] [2023-02-15 14:15:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:21,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:21,484 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:21,501 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash 40825, now seen corresponding path program 1 times [2023-02-15 14:15:21,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:21,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882661631] [2023-02-15 14:15:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:21,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:21,527 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:21,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 14:15:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash 28699767, now seen corresponding path program 1 times [2023-02-15 14:15:21,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 14:15:21,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693276598] [2023-02-15 14:15:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 14:15:21,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 14:15:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:21,556 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:21,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 14:15:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:21,743 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 14:15:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 14:15:21,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.02 02:15:21 BoogieIcfgContainer [2023-02-15 14:15:21,757 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-02-15 14:15:21,757 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 14:15:21,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 14:15:21,758 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 14:15:21,758 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:15:21" (3/4) ... [2023-02-15 14:15:21,760 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-02-15 14:15:21,781 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 14:15:21,781 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 14:15:21,782 INFO L158 Benchmark]: Toolchain (without parser) took 852.75ms. Allocated memory is still 180.4MB. Free memory was 135.3MB in the beginning and 140.7MB in the end (delta: -5.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:15:21,783 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 121.6MB. Free memory was 64.6MB in the beginning and 64.5MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:15:21,783 INFO L158 Benchmark]: CACSL2BoogieTranslator took 141.51ms. Allocated memory is still 180.4MB. Free memory was 134.8MB in the beginning and 125.8MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 14:15:21,783 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.74ms. Allocated memory is still 180.4MB. Free memory was 125.8MB in the beginning and 124.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 14:15:21,784 INFO L158 Benchmark]: Boogie Preprocessor took 12.55ms. Allocated memory is still 180.4MB. Free memory was 124.3MB in the beginning and 123.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:15:21,784 INFO L158 Benchmark]: RCFGBuilder took 203.34ms. Allocated memory is still 180.4MB. Free memory was 123.2MB in the beginning and 114.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 14:15:21,784 INFO L158 Benchmark]: BuchiAutomizer took 445.49ms. Allocated memory is still 180.4MB. Free memory was 114.9MB in the beginning and 142.7MB in the end (delta: -27.9MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 14:15:21,785 INFO L158 Benchmark]: Witness Printer took 23.96ms. Allocated memory is still 180.4MB. Free memory was 142.7MB in the beginning and 141.7MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 14:15:21,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 121.6MB. Free memory was 64.6MB in the beginning and 64.5MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 141.51ms. Allocated memory is still 180.4MB. Free memory was 134.8MB in the beginning and 125.8MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.74ms. Allocated memory is still 180.4MB. Free memory was 125.8MB in the beginning and 124.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.55ms. Allocated memory is still 180.4MB. Free memory was 124.3MB in the beginning and 123.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 203.34ms. Allocated memory is still 180.4MB. Free memory was 123.2MB in the beginning and 114.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 445.49ms. Allocated memory is still 180.4MB. Free memory was 114.9MB in the beginning and 142.7MB in the end (delta: -27.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 23.96ms. Allocated memory is still 180.4MB. Free memory was 142.7MB in the beginning and 141.7MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.3s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. 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 [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L6] int x; [L7] int y; [L8] int tmp; [L9] int xtmp; [L10] x = __VERIFIER_nondet_int() [L11] y = __VERIFIER_nondet_int() Loop: [L13] COND TRUE (y != 0 && x >= 0) && y >= 0 [L14] tmp = y [L15] xtmp = x [L17] COND TRUE x == y [L18] y = 0 [L26] y = xtmp [L27] x = tmp End of lasso representation. - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int x; [L7] int y; [L8] int tmp; [L9] int xtmp; [L10] x = __VERIFIER_nondet_int() [L11] y = __VERIFIER_nondet_int() Loop: [L13] COND TRUE (y != 0 && x >= 0) && y >= 0 [L14] tmp = y [L15] xtmp = x [L17] COND TRUE x == y [L18] y = 0 [L26] y = xtmp [L27] x = tmp End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2023-02-15 14:15:21,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)