./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 7e1ff0e6 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-?-7e1ff0e [2023-02-15 02:24:55,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 02:24:55,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 02:24:55,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 02:24:55,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 02:24:55,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 02:24:55,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 02:24:55,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 02:24:55,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 02:24:55,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 02:24:55,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 02:24:55,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 02:24:55,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 02:24:55,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 02:24:55,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 02:24:55,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 02:24:55,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 02:24:55,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 02:24:55,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 02:24:55,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 02:24:55,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 02:24:55,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 02:24:55,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 02:24:55,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 02:24:55,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 02:24:55,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 02:24:55,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 02:24:55,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 02:24:55,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 02:24:55,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 02:24:55,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 02:24:55,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 02:24:55,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 02:24:55,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 02:24:55,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 02:24:55,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 02:24:55,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 02:24:55,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 02:24:55,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 02:24:55,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 02:24:55,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 02:24:55,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2023-02-15 02:24:55,328 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 02:24:55,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 02:24:55,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 02:24:55,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 02:24:55,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 02:24:55,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 02:24:55,330 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 02:24:55,331 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2023-02-15 02:24:55,331 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2023-02-15 02:24:55,331 INFO L138 SettingsManager]: * Use old map elimination=false [2023-02-15 02:24:55,332 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2023-02-15 02:24:55,332 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2023-02-15 02:24:55,332 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2023-02-15 02:24:55,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 02:24:55,333 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 02:24:55,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 02:24:55,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 02:24:55,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2023-02-15 02:24:55,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2023-02-15 02:24:55,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2023-02-15 02:24:55,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 02:24:55,334 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2023-02-15 02:24:55,334 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 02:24:55,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2023-02-15 02:24:55,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 02:24:55,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 02:24:55,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 02:24:55,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 02:24:55,336 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2023-02-15 02:24:55,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35227298135ad932045d20354d3c27230a951768ba1221004cc62379288111ba [2023-02-15 02:24:55,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 02:24:55,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 02:24:55,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 02:24:55,530 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 02:24:55,531 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 02:24:55,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/GCD2.c [2023-02-15 02:24:56,467 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 02:24:56,628 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 02:24:56,628 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/GCD2.c [2023-02-15 02:24:56,634 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90990d5b1/69c8d2771c744482ae905ee188eb66a2/FLAGd1c67c20d [2023-02-15 02:24:56,647 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90990d5b1/69c8d2771c744482ae905ee188eb66a2 [2023-02-15 02:24:56,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 02:24:56,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 02:24:56,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 02:24:56,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 02:24:56,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 02:24:56,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205640a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56, skipping insertion in model container [2023-02-15 02:24:56,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 02:24:56,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 02:24:56,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 02:24:56,766 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 02:24:56,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 02:24:56,789 INFO L208 MainTranslator]: Completed translation [2023-02-15 02:24:56,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56 WrapperNode [2023-02-15 02:24:56,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 02:24:56,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 02:24:56,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 02:24:56,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 02:24:56,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,813 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-02-15 02:24:56,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 02:24:56,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 02:24:56,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 02:24:56,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 02:24:56,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,824 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 02:24:56,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 02:24:56,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 02:24:56,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 02:24:56,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (1/1) ... [2023-02-15 02:24:56,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-02-15 02:24:56,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 02:24:56,852 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 02:24:56,855 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 02:24:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 02:24:56,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 02:24:56,938 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 02:24:56,940 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 02:24:56,990 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 02:24:56,994 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 02:24:56,995 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 02:24:56,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:24:56 BoogieIcfgContainer [2023-02-15 02:24:56,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 02:24:56,997 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2023-02-15 02:24:56,997 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2023-02-15 02:24:56,999 INFO L275 PluginConnector]: BuchiAutomizer initialized [2023-02-15 02:24:57,000 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 02:24:57,000 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.02 02:24:56" (1/3) ... [2023-02-15 02:24:57,001 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@f106c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:24:57, skipping insertion in model container [2023-02-15 02:24:57,001 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 02:24:57,001 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:24:56" (2/3) ... [2023-02-15 02:24:57,002 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@f106c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.02 02:24:57, skipping insertion in model container [2023-02-15 02:24:57,002 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2023-02-15 02:24:57,002 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:24:56" (3/3) ... [2023-02-15 02:24:57,003 INFO L332 chiAutomizerObserver]: Analyzing ICFG GCD2.c [2023-02-15 02:24:57,050 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2023-02-15 02:24:57,050 INFO L304 stractBuchiCegarLoop]: Hoare is false [2023-02-15 02:24:57,051 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2023-02-15 02:24:57,051 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2023-02-15 02:24:57,051 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2023-02-15 02:24:57,051 INFO L308 stractBuchiCegarLoop]: Difference is false [2023-02-15 02:24:57,051 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2023-02-15 02:24:57,051 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2023-02-15 02:24:57,056 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 02:24:57,084 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-15 02:24:57,084 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 02:24:57,085 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 02:24:57,088 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-15 02:24:57,088 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 02:24:57,088 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2023-02-15 02:24:57,089 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 02:24:57,090 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2023-02-15 02:24:57,090 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2023-02-15 02:24:57,090 INFO L119 BuchiIsEmpty]: Starting construction of run [2023-02-15 02:24:57,090 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1] [2023-02-15 02:24:57,090 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2023-02-15 02:24:57,097 INFO L748 eck$LassoCheckResult]: Stem: 7#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_#t~nondet1#1, main_~x~0#1, main_~y~0#1, main_~tmp~0#1, main_~xtmp~0#1;havoc main_~x~0#1;havoc main_~y~0#1;havoc main_~tmp~0#1;havoc main_~xtmp~0#1;main_~x~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~y~0#1 := main_#t~nondet1#1;havoc main_#t~nondet1#1; 6#L13-2true [2023-02-15 02:24:57,097 INFO L750 eck$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 02:24:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 02:24:57,111 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2023-02-15 02:24:57,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 02:24:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131051837] [2023-02-15 02:24:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 02:24:57,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 02:24:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 02:24:57,179 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 02:24:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 02:24:57,190 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 02:24:57,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 02:24:57,192 INFO L85 PathProgramCache]: Analyzing trace with hash 40825, now seen corresponding path program 1 times [2023-02-15 02:24:57,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 02:24:57,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902372207] [2023-02-15 02:24:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 02:24:57,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 02:24:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 02:24:57,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 02:24:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 02:24:57,220 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 02:24:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 02:24:57,222 INFO L85 PathProgramCache]: Analyzing trace with hash 28699767, now seen corresponding path program 1 times [2023-02-15 02:24:57,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 02:24:57,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994427822] [2023-02-15 02:24:57,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 02:24:57,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 02:24:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 02:24:57,238 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 02:24:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 02:24:57,247 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 02:24:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 02:24:57,417 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 02:24:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 02:24:57,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.02 02:24:57 BoogieIcfgContainer [2023-02-15 02:24:57,433 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2023-02-15 02:24:57,434 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 02:24:57,434 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 02:24:57,434 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 02:24:57,434 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:24:56" (3/4) ... [2023-02-15 02:24:57,436 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2023-02-15 02:24:57,474 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 02:24:57,475 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 02:24:57,476 INFO L158 Benchmark]: Toolchain (without parser) took 825.13ms. Allocated memory was 138.4MB in the beginning and 205.5MB in the end (delta: 67.1MB). Free memory was 94.5MB in the beginning and 162.1MB in the end (delta: -67.6MB). Peak memory consumption was 527.3kB. Max. memory is 16.1GB. [2023-02-15 02:24:57,476 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 138.4MB. Free memory was 103.6MB in the beginning and 103.6MB in the end (delta: 18.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 02:24:57,477 INFO L158 Benchmark]: CACSL2BoogieTranslator took 138.20ms. Allocated memory is still 138.4MB. Free memory was 94.0MB in the beginning and 85.1MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 02:24:57,477 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.59ms. Allocated memory is still 138.4MB. Free memory was 85.1MB in the beginning and 83.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 02:24:57,478 INFO L158 Benchmark]: Boogie Preprocessor took 10.98ms. Allocated memory is still 138.4MB. Free memory was 83.5MB in the beginning and 82.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 02:24:57,478 INFO L158 Benchmark]: RCFGBuilder took 170.25ms. Allocated memory is still 138.4MB. Free memory was 82.4MB in the beginning and 74.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 02:24:57,478 INFO L158 Benchmark]: BuchiAutomizer took 436.29ms. Allocated memory was 138.4MB in the beginning and 205.5MB in the end (delta: 67.1MB). Free memory was 74.0MB in the beginning and 164.2MB in the end (delta: -90.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 02:24:57,479 INFO L158 Benchmark]: Witness Printer took 41.11ms. Allocated memory is still 205.5MB. Free memory was 163.1MB in the beginning and 162.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 02:24:57,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 138.4MB. Free memory was 103.6MB in the beginning and 103.6MB in the end (delta: 18.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 138.20ms. Allocated memory is still 138.4MB. Free memory was 94.0MB in the beginning and 85.1MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.59ms. Allocated memory is still 138.4MB. Free memory was 85.1MB in the beginning and 83.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.98ms. Allocated memory is still 138.4MB. Free memory was 83.5MB in the beginning and 82.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 170.25ms. Allocated memory is still 138.4MB. Free memory was 82.4MB in the beginning and 74.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 436.29ms. Allocated memory was 138.4MB in the beginning and 205.5MB in the end (delta: 67.1MB). Free memory was 74.0MB in the beginning and 164.2MB in the end (delta: -90.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 41.11ms. Allocated memory is still 205.5MB. Free memory was 163.1MB in the beginning and 162.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program 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 02:24:57,507 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)