./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 b5317dae 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-?-b5317da-m [2023-02-16 04:32:47,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 04:32:47,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 04:32:47,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 04:32:47,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 04:32:47,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 04:32:47,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 04:32:47,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 04:32:47,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 04:32:47,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 04:32:47,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 04:32:47,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 04:32:47,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 04:32:47,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 04:32:47,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 04:32:47,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 04:32:47,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 04:32:47,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 04:32:47,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 04:32:47,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 04:32:47,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 04:32:47,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 04:32:47,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 04:32:47,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 04:32:48,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 04:32:48,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 04:32:48,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 04:32:48,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 04:32:48,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 04:32:48,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 04:32:48,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 04:32:48,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 04:32:48,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 04:32:48,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 04:32:48,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 04:32:48,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 04:32:48,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 04:32:48,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 04:32:48,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 04:32:48,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 04:32:48,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 04:32:48,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-02-16 04:32:48,034 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 04:32:48,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 04:32:48,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 04:32:48,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 04:32:48,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 04:32:48,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 04:32:48,036 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 04:32:48,036 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-02-16 04:32:48,037 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-02-16 04:32:48,037 INFO L138 SettingsManager]: * Use old map elimination=false [2023-02-16 04:32:48,037 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2023-02-16 04:32:48,037 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2023-02-16 04:32:48,038 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-02-16 04:32:48,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 04:32:48,038 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 04:32:48,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 04:32:48,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 04:32:48,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-02-16 04:32:48,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-02-16 04:32:48,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-02-16 04:32:48,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 04:32:48,039 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-02-16 04:32:48,039 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 04:32:48,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-02-16 04:32:48,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 04:32:48,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 04:32:48,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 04:32:48,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 04:32:48,047 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-02-16 04:32:48,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35227298135ad932045d20354d3c27230a951768ba1221004cc62379288111ba [2023-02-16 04:32:48,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 04:32:48,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 04:32:48,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 04:32:48,237 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 04:32:48,237 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 04:32:48,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/GCD2.c [2023-02-16 04:32:49,219 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 04:32:49,374 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 04:32:49,374 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/GCD2.c [2023-02-16 04:32:49,378 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa34f2986/90db97b6351d4abaa869bacc13f31fd3/FLAG4c7c9098a [2023-02-16 04:32:49,390 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa34f2986/90db97b6351d4abaa869bacc13f31fd3 [2023-02-16 04:32:49,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 04:32:49,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 04:32:49,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 04:32:49,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 04:32:49,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 04:32:49,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9e0158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49, skipping insertion in model container [2023-02-16 04:32:49,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 04:32:49,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 04:32:49,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 04:32:49,504 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 04:32:49,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 04:32:49,520 INFO L208 MainTranslator]: Completed translation [2023-02-16 04:32:49,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49 WrapperNode [2023-02-16 04:32:49,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 04:32:49,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 04:32:49,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 04:32:49,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 04:32:49,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,543 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-02-16 04:32:49,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 04:32:49,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 04:32:49,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 04:32:49,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 04:32:49,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,554 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 04:32:49,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 04:32:49,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 04:32:49,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 04:32:49,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (1/1) ... [2023-02-16 04:32:49,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-16 04:32:49,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 04:32:49,581 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) [2023-02-16 04:32:49,584 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 [2023-02-16 04:32:49,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 04:32:49,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 04:32:49,659 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 04:32:49,660 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 04:32:49,705 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 04:32:49,710 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 04:32:49,710 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-16 04:32:49,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 04:32:49 BoogieIcfgContainer [2023-02-16 04:32:49,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 04:32:49,713 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-02-16 04:32:49,713 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2023-02-16 04:32:49,715 INFO L275 PluginConnector]: BuchiAutomizer initialized [2023-02-16 04:32:49,716 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-16 04:32:49,716 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.02 04:32:49" (1/3) ... [2023-02-16 04:32:49,717 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@29bc2d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.02 04:32:49, skipping insertion in model container [2023-02-16 04:32:49,718 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-16 04:32:49,718 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 04:32:49" (2/3) ... [2023-02-16 04:32:49,720 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@29bc2d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.02 04:32:49, skipping insertion in model container [2023-02-16 04:32:49,720 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-16 04:32:49,720 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 04:32:49" (3/3) ... [2023-02-16 04:32:49,725 INFO L332 chiAutomizerObserver]: Analyzing ICFG GCD2.c [2023-02-16 04:32:49,765 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-02-16 04:32:49,765 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-02-16 04:32:49,765 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-02-16 04:32:49,765 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-02-16 04:32:49,765 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-02-16 04:32:49,766 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-02-16 04:32:49,766 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-02-16 04:32:49,766 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-02-16 04:32:49,768 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) [2023-02-16 04:32:49,778 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-16 04:32:49,778 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-16 04:32:49,778 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-16 04:32:49,781 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-16 04:32:49,781 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-16 04:32:49,781 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-02-16 04:32:49,782 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) [2023-02-16 04:32:49,782 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-16 04:32:49,783 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-16 04:32:49,783 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-16 04:32:49,783 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-16 04:32:49,783 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-16 04:32:49,788 INFO L748 eck$LassoCheckResult]: Stem: 7#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1, main_~tmp~0#1, main_~xtmp~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~tmp~0#1;havoc main_~xtmp~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 6#L13-2true [2023-02-16 04:32:49,788 INFO L750 eck$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 [2023-02-16 04:32:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 04:32:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2023-02-16 04:32:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 04:32:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505076305] [2023-02-16 04:32:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 04:32:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 04:32:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 04:32:49,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 04:32:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 04:32:49,870 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-16 04:32:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 04:32:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash 40825, now seen corresponding path program 1 times [2023-02-16 04:32:49,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 04:32:49,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270243265] [2023-02-16 04:32:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 04:32:49,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 04:32:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 04:32:49,896 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 04:32:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 04:32:49,915 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-16 04:32:49,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 04:32:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash 28699767, now seen corresponding path program 1 times [2023-02-16 04:32:49,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 04:32:49,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323628209] [2023-02-16 04:32:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 04:32:49,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 04:32:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 04:32:49,934 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 04:32:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 04:32:49,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-16 04:32:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 04:32:50,086 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-16 04:32:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-16 04:32:50,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 16.02 04:32:50 BoogieIcfgContainer [2023-02-16 04:32:50,100 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-02-16 04:32:50,101 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-16 04:32:50,101 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-16 04:32:50,101 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-16 04:32:50,101 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 04:32:49" (3/4) ... [2023-02-16 04:32:50,104 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-02-16 04:32:50,135 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-16 04:32:50,135 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-16 04:32:50,136 INFO L158 Benchmark]: Toolchain (without parser) took 743.25ms. Allocated memory is still 130.0MB. Free memory was 101.2MB in the beginning and 96.0MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-02-16 04:32:50,137 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 100.7MB. Free memory is still 70.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 04:32:50,137 INFO L158 Benchmark]: CACSL2BoogieTranslator took 127.56ms. Allocated memory is still 130.0MB. Free memory was 101.2MB in the beginning and 91.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-16 04:32:50,138 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.93ms. Allocated memory is still 130.0MB. Free memory was 91.7MB in the beginning and 90.8MB in the end (delta: 964.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 04:32:50,138 INFO L158 Benchmark]: Boogie Preprocessor took 11.93ms. Allocated memory is still 130.0MB. Free memory was 90.6MB in the beginning and 89.6MB in the end (delta: 960.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 04:32:50,138 INFO L158 Benchmark]: RCFGBuilder took 155.32ms. Allocated memory is still 130.0MB. Free memory was 89.6MB in the beginning and 81.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-16 04:32:50,139 INFO L158 Benchmark]: BuchiAutomizer took 387.83ms. Allocated memory is still 130.0MB. Free memory was 80.8MB in the beginning and 98.1MB in the end (delta: -17.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 04:32:50,139 INFO L158 Benchmark]: Witness Printer took 34.61ms. Allocated memory is still 130.0MB. Free memory was 98.1MB in the beginning and 96.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 04:32:50,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 100.7MB. Free memory is still 70.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 127.56ms. Allocated memory is still 130.0MB. Free memory was 101.2MB in the beginning and 91.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.93ms. Allocated memory is still 130.0MB. Free memory was 91.7MB in the beginning and 90.8MB in the end (delta: 964.3kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 11.93ms. Allocated memory is still 130.0MB. Free memory was 90.6MB in the beginning and 89.6MB in the end (delta: 960.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 155.32ms. Allocated memory is still 130.0MB. Free memory was 89.6MB in the beginning and 81.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 387.83ms. Allocated memory is still 130.0MB. Free memory was 80.8MB in the beginning and 98.1MB in the end (delta: -17.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 34.61ms. Allocated memory is still 130.0MB. Free memory was 98.1MB in the beginning and 96.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program 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! [2023-02-16 04:32:50,166 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)