./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive/gcd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec 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/recursive/gcd01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash d6f4e1dd3818e9d3e8c54653af66359ead501b84 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 16:28:12,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 16:28:12,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 16:28:12,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 16:28:12,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 16:28:12,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 16:28:12,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 16:28:12,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 16:28:12,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 16:28:12,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 16:28:12,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 16:28:12,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 16:28:12,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 16:28:12,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 16:28:12,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 16:28:12,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 16:28:12,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 16:28:12,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 16:28:12,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 16:28:12,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 16:28:12,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 16:28:12,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 16:28:12,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 16:28:12,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 16:28:12,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 16:28:12,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 16:28:12,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 16:28:12,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 16:28:12,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 16:28:12,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 16:28:12,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 16:28:12,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 16:28:12,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 16:28:12,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 16:28:12,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 16:28:12,804 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 16:28:12,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 16:28:12,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 16:28:12,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 16:28:12,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 16:28:12,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 16:28:12,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-27 16:28:12,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 16:28:12,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 16:28:12,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 16:28:12,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 16:28:12,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 16:28:12,843 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 16:28:12,843 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 16:28:12,844 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 16:28:12,844 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 16:28:12,844 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 16:28:12,845 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 16:28:12,845 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 16:28:12,845 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 16:28:12,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 16:28:12,857 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 16:28:12,857 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 16:28:12,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 16:28:12,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 16:28:12,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 16:28:12,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 16:28:12,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 16:28:12,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 16:28:12,858 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 16:28:12,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 16:28:12,858 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 16:28:12,859 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 16:28:12,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 16:28:12,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 16:28:12,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 16:28:12,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 16:28:12,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 16:28:12,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 16:28:12,861 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 16:28:12,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6f4e1dd3818e9d3e8c54653af66359ead501b84 [2021-08-27 16:28:13,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 16:28:13,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 16:28:13,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 16:28:13,151 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 16:28:13,151 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 16:28:13,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd01-1.c [2021-08-27 16:28:13,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aab49a357/91968feba7274656aae184f196b2fb81/FLAG653f1449c [2021-08-27 16:28:13,604 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 16:28:13,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd01-1.c [2021-08-27 16:28:13,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aab49a357/91968feba7274656aae184f196b2fb81/FLAG653f1449c [2021-08-27 16:28:13,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aab49a357/91968feba7274656aae184f196b2fb81 [2021-08-27 16:28:13,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 16:28:13,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 16:28:13,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 16:28:13,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 16:28:13,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 16:28:13,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d5f29c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13, skipping insertion in model container [2021-08-27 16:28:13,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 16:28:13,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 16:28:13,754 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2021-08-27 16:28:13,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 16:28:13,763 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 16:28:13,775 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2021-08-27 16:28:13,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 16:28:13,794 INFO L208 MainTranslator]: Completed translation [2021-08-27 16:28:13,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13 WrapperNode [2021-08-27 16:28:13,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 16:28:13,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 16:28:13,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 16:28:13,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 16:28:13,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 16:28:13,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 16:28:13,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 16:28:13,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 16:28:13,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 16:28:13,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 16:28:13,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 16:28:13,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 16:28:13,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (1/1) ... [2021-08-27 16:28:13,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:13,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:13,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:13,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 16:28:13,939 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-08-27 16:28:13,940 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-08-27 16:28:13,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 16:28:13,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 16:28:13,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 16:28:13,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 16:28:14,115 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 16:28:14,116 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 16:28:14,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:28:14 BoogieIcfgContainer [2021-08-27 16:28:14,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 16:28:14,118 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 16:28:14,118 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 16:28:14,121 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 16:28:14,121 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:28:14,122 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 04:28:13" (1/3) ... [2021-08-27 16:28:14,123 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@52a43190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 04:28:14, skipping insertion in model container [2021-08-27 16:28:14,123 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:28:14,123 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:13" (2/3) ... [2021-08-27 16:28:14,123 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@52a43190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 04:28:14, skipping insertion in model container [2021-08-27 16:28:14,123 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:28:14,123 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:28:14" (3/3) ... [2021-08-27 16:28:14,125 INFO L389 chiAutomizerObserver]: Analyzing ICFG gcd01-1.c [2021-08-27 16:28:14,159 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 16:28:14,159 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 16:28:14,159 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 16:28:14,159 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 16:28:14,159 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 16:28:14,159 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 16:28:14,160 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 16:28:14,160 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 16:28:14,171 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 16:28:14,192 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-08-27 16:28:14,193 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:28:14,193 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:28:14,198 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-27 16:28:14,212 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-08-27 16:28:14,212 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 16:28:14,212 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 16:28:14,215 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-08-27 16:28:14,215 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:28:14,215 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:28:14,215 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-08-27 16:28:14,216 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-08-27 16:28:14,221 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10#L-1true havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 11#L32true assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 12#L36true assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 22#L39true call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 23#gcdENTRYtrue [2021-08-27 16:28:14,222 INFO L793 eck$LassoCheckResult]: Loop: 23#gcdENTRYtrue ~y1 := #in~y1;~y2 := #in~y2; 7#L18true assume !(~y1 <= 0 || ~y2 <= 0); 13#L21true assume !(~y1 == ~y2); 19#L24true assume !(~y1 > ~y2); 18#L27true call #t~ret8 := gcd(~y1, ~y2 - ~y1);< 23#gcdENTRYtrue [2021-08-27 16:28:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:14,227 INFO L82 PathProgramCache]: Analyzing trace with hash 45873351, now seen corresponding path program 1 times [2021-08-27 16:28:14,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:14,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717377220] [2021-08-27 16:28:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:14,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:14,372 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:14,432 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:14,436 INFO L82 PathProgramCache]: Analyzing trace with hash 28756482, now seen corresponding path program 1 times [2021-08-27 16:28:14,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:14,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865994646] [2021-08-27 16:28:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:14,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:14,461 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:14,472 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash -6988548, now seen corresponding path program 1 times [2021-08-27 16:28:14,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:14,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637948104] [2021-08-27 16:28:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:14,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:14,497 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:14,529 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:14,746 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:14,747 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:14,747 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:14,747 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:14,747 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:28:14,748 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:14,748 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:14,748 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:14,748 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration1_Loop [2021-08-27 16:28:14,749 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:14,749 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:14,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:14,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:14,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:14,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:14,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:14,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:14,865 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:14,865 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:28:14,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:14,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:14,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:14,876 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:14,876 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:14,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-27 16:28:14,892 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:14,893 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#res=0} Honda state: {gcd_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:14,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:14,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:14,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:14,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:14,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-27 16:28:14,928 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:14,928 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:14,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:14,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:14,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:14,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:14,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 16:28:14,988 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:28:14,988 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:15,085 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:28:15,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:15,093 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:15,093 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:15,093 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:15,093 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:15,093 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:28:15,093 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:15,093 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:15,093 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:15,093 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration1_Loop [2021-08-27 16:28:15,093 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:15,094 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:15,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:15,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:15,103 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:15,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:15,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:15,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:15,185 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:15,189 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:28:15,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:15,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:15,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:15,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 16:28:15,193 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:15,202 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:15,202 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:15,202 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:15,203 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:15,203 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:15,204 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:15,205 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:15,221 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:15,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:15,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:15,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:15,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 16:28:15,255 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:15,262 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:15,262 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:15,262 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:15,262 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:15,262 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:15,263 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:15,263 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:15,279 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:15,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:15,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:15,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:15,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:15,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 16:28:15,300 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:15,308 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:15,308 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:15,309 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:15,309 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:15,309 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:15,311 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:15,311 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:15,325 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:28:15,329 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:28:15,329 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 16:28:15,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:15,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:15,337 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:15,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-27 16:28:15,339 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:28:15,340 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:28:15,340 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:28:15,340 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_#in~y2) = 1*gcd_#in~y2 Supporting invariants [] [2021-08-27 16:28:15,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:15,369 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:28:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:15,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 16:28:15,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 16:28:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:15,583 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-08-27 16:28:15,585 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:15,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:15,722 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 71 states and 98 transitions. Complement of second has 18 states. [2021-08-27 16:28:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 4 non-accepting loop states 1 accepting loop states [2021-08-27 16:28:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 25 transitions. [2021-08-27 16:28:15,727 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 25 transitions. Stem has 5 letters. Loop has 5 letters. [2021-08-27 16:28:15,728 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:15,728 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 25 transitions. Stem has 10 letters. Loop has 5 letters. [2021-08-27 16:28:15,728 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:15,729 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 25 transitions. Stem has 5 letters. Loop has 10 letters. [2021-08-27 16:28:15,729 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:15,729 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 71 states and 98 transitions. [2021-08-27 16:28:15,734 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:28:15,738 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 71 states to 28 states and 32 transitions. [2021-08-27 16:28:15,739 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2021-08-27 16:28:15,739 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-08-27 16:28:15,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 32 transitions. [2021-08-27 16:28:15,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:28:15,740 INFO L681 BuchiCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-08-27 16:28:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 32 transitions. [2021-08-27 16:28:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2021-08-27 16:28:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-08-27 16:28:15,761 INFO L704 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-08-27 16:28:15,762 INFO L587 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-08-27 16:28:15,762 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 16:28:15,762 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 21 transitions. [2021-08-27 16:28:15,762 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:28:15,762 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:28:15,763 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:28:15,763 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-08-27 16:28:15,763 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-08-27 16:28:15,763 INFO L791 eck$LassoCheckResult]: Stem: 165#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 166#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 180#L32 assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 181#L36 assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 170#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 182#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 173#L18 [2021-08-27 16:28:15,764 INFO L793 eck$LassoCheckResult]: Loop: 173#L18 assume !(~y1 <= 0 || ~y2 <= 0); 174#L21 assume !(~y1 == ~y2); 178#L24 assume ~y1 > ~y2; 167#L25 call #t~ret7 := gcd(~y1 - ~y2, ~y2);< 169#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 173#L18 [2021-08-27 16:28:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:15,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1422073881, now seen corresponding path program 1 times [2021-08-27 16:28:15,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:15,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935871044] [2021-08-27 16:28:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:15,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:15,776 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:15,786 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:15,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:15,787 INFO L82 PathProgramCache]: Analyzing trace with hash 32573467, now seen corresponding path program 1 times [2021-08-27 16:28:15,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:15,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100391913] [2021-08-27 16:28:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:15,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:15,792 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:15,797 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash -216647933, now seen corresponding path program 1 times [2021-08-27 16:28:15,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:15,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119465273] [2021-08-27 16:28:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:15,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:15,816 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:15,845 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:15,947 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:15,948 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:15,948 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:15,948 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:15,948 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:28:15,948 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:15,948 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:15,948 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:15,949 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration2_Loop [2021-08-27 16:28:15,949 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:15,949 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:15,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:15,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:15,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:15,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:16,017 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:16,017 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:28:16,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:16,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:16,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:16,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 16:28:16,024 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:16,024 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:16,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:16,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:16,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:16,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:16,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 16:28:16,086 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:28:16,086 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:17,807 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:28:17,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:17,812 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:17,812 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:17,812 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:17,812 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:17,813 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:28:17,813 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:17,813 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:17,813 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:17,813 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration2_Loop [2021-08-27 16:28:17,813 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:17,813 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:17,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:17,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:17,834 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:17,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:17,891 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:17,891 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:28:17,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:17,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:17,892 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:17,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 16:28:17,896 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:17,903 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:17,903 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:17,903 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:17,903 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:17,903 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:17,906 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:17,906 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:17,936 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:28:17,941 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:28:17,941 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 16:28:17,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:17,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:17,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:17,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 16:28:17,948 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:28:17,948 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:28:17,948 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:28:17,948 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y1) = 1*gcd_~y1 Supporting invariants [] [2021-08-27 16:28:17,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:17,965 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:28:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:18,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 16:28:18,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:18,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:18,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 16:28:18,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:18,154 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2021-08-27 16:28:18,154 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5 Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:18,178 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 54 states and 61 transitions. Complement of second has 15 states. [2021-08-27 16:28:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 16:28:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-08-27 16:28:18,179 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 6 letters. Loop has 5 letters. [2021-08-27 16:28:18,180 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:18,180 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2021-08-27 16:28:18,180 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:18,180 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 6 letters. Loop has 10 letters. [2021-08-27 16:28:18,180 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:18,181 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 61 transitions. [2021-08-27 16:28:18,182 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:28:18,183 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 33 states and 37 transitions. [2021-08-27 16:28:18,183 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-08-27 16:28:18,183 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-08-27 16:28:18,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 37 transitions. [2021-08-27 16:28:18,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:28:18,184 INFO L681 BuchiCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-08-27 16:28:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 37 transitions. [2021-08-27 16:28:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-08-27 16:28:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 19 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-27 16:28:18,186 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-27 16:28:18,186 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-27 16:28:18,186 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 16:28:18,186 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 28 transitions. [2021-08-27 16:28:18,187 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:28:18,187 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:28:18,187 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:28:18,187 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:28:18,187 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2021-08-27 16:28:18,188 INFO L791 eck$LassoCheckResult]: Stem: 305#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 306#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 321#L32 assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 322#L36 assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 316#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 324#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 325#L18 assume !(~y1 <= 0 || ~y2 <= 0); 323#L21 assume !(~y1 == ~y2); 320#L24 assume !(~y1 > ~y2); 308#L27 call #t~ret8 := gcd(~y1, ~y2 - ~y1);< 317#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 312#L18 [2021-08-27 16:28:18,188 INFO L793 eck$LassoCheckResult]: Loop: 312#L18 assume !(~y1 <= 0 || ~y2 <= 0); 313#L21 assume !(~y1 == ~y2); 319#L24 assume ~y1 > ~y2; 307#L25 call #t~ret7 := gcd(~y1 - ~y2, ~y2);< 309#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 312#L18 [2021-08-27 16:28:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash -216644988, now seen corresponding path program 2 times [2021-08-27 16:28:18,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:18,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221702457] [2021-08-27 16:28:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:18,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:18,206 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:18,231 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:18,232 INFO L82 PathProgramCache]: Analyzing trace with hash 32573467, now seen corresponding path program 2 times [2021-08-27 16:28:18,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:18,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21794206] [2021-08-27 16:28:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:18,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:18,240 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:18,251 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:18,252 INFO L82 PathProgramCache]: Analyzing trace with hash 201252728, now seen corresponding path program 1 times [2021-08-27 16:28:18,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:18,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627812160] [2021-08-27 16:28:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:18,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:18,278 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:18,299 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:18,419 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:18,419 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:18,419 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:18,419 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:18,419 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:28:18,420 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:18,420 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:18,420 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:18,420 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration3_Loop [2021-08-27 16:28:18,420 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:18,420 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:18,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:18,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:18,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:18,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:18,490 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:18,491 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:28:18,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:18,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:18,497 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:18,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 16:28:18,499 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:18,499 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:18,509 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:18,509 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#t~ret7=0} Honda state: {gcd_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:18,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-08-27 16:28:18,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:18,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:18,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:18,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-08-27 16:28:18,531 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:18,531 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:18,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:18,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:18,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:18,563 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:18,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 16:28:18,565 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:28:18,565 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:20,245 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:28:20,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-08-27 16:28:20,250 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:20,250 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:20,250 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:20,250 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:20,250 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:28:20,250 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:20,251 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:20,251 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:20,251 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration3_Loop [2021-08-27 16:28:20,251 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:20,251 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:20,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:20,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:20,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:20,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:20,311 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:20,312 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:28:20,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:20,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:20,313 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:20,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-27 16:28:20,318 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:20,324 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:20,325 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:20,325 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:20,325 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:20,325 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:20,325 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:20,326 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:20,327 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:20,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:20,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:20,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:20,346 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:20,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-27 16:28:20,349 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:20,356 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:20,356 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:20,356 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:20,356 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:20,356 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:20,358 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:20,358 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:20,368 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:28:20,371 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 16:28:20,371 INFO L444 ModelExtractionUtils]: 4 out of 6 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 16:28:20,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:20,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:20,374 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:20,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-27 16:28:20,379 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:28:20,379 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:28:20,380 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:28:20,380 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y1) = 1*gcd_~y1 Supporting invariants [] [2021-08-27 16:28:20,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:20,396 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:28:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:20,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 16:28:20,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:20,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 16:28:20,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:20,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:20,601 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2021-08-27 16:28:20,601 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:20,624 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 46 states and 51 transitions. Complement of second has 15 states. [2021-08-27 16:28:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 16:28:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-08-27 16:28:20,625 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2021-08-27 16:28:20,626 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:20,626 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:28:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 16:28:20,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:20,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 16:28:20,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:20,799 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 4 loop predicates [2021-08-27 16:28:20,799 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:20,821 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 46 states and 51 transitions. Complement of second has 15 states. [2021-08-27 16:28:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 16:28:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-08-27 16:28:20,822 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2021-08-27 16:28:20,822 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:20,822 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:28:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:20,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 16:28:20,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:28:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 16:28:20,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:28:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:28:20,983 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2021-08-27 16:28:20,983 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:21,021 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 75 states and 86 transitions. Complement of second has 17 states. [2021-08-27 16:28:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 16:28:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:28:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2021-08-27 16:28:21,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 11 letters. Loop has 5 letters. [2021-08-27 16:28:21,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:21,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 5 letters. [2021-08-27 16:28:21,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:21,024 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 11 letters. Loop has 10 letters. [2021-08-27 16:28:21,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:28:21,024 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 75 states and 86 transitions. [2021-08-27 16:28:21,026 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:28:21,026 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 75 states to 0 states and 0 transitions. [2021-08-27 16:28:21,026 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 16:28:21,026 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 16:28:21,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 16:28:21,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 16:28:21,027 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:28:21,027 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:28:21,027 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:28:21,027 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 16:28:21,027 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 16:28:21,027 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:28:21,028 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 16:28:21,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 04:28:21 BoogieIcfgContainer [2021-08-27 16:28:21,033 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 16:28:21,033 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 16:28:21,033 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 16:28:21,033 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 16:28:21,034 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:28:14" (3/4) ... [2021-08-27 16:28:21,036 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 16:28:21,036 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 16:28:21,038 INFO L168 Benchmark]: Toolchain (without parser) took 7407.18 ms. Allocated memory was 67.1 MB in the beginning and 98.6 MB in the end (delta: 31.5 MB). Free memory was 47.4 MB in the beginning and 44.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:21,038 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 48.7 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:28:21,039 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.96 ms. Allocated memory is still 67.1 MB. Free memory was 47.2 MB in the beginning and 50.5 MB in the end (delta: -3.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:21,039 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.94 ms. Allocated memory is still 67.1 MB. Free memory was 50.5 MB in the beginning and 49.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:21,039 INFO L168 Benchmark]: Boogie Preprocessor took 14.07 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 48.1 MB in the end (delta: 965.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:28:21,040 INFO L168 Benchmark]: RCFGBuilder took 269.65 ms. Allocated memory is still 67.1 MB. Free memory was 48.1 MB in the beginning and 35.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:21,040 INFO L168 Benchmark]: BuchiAutomizer took 6914.47 ms. Allocated memory was 67.1 MB in the beginning and 98.6 MB in the end (delta: 31.5 MB). Free memory was 35.0 MB in the beginning and 44.4 MB in the end (delta: -9.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2021-08-27 16:28:21,041 INFO L168 Benchmark]: Witness Printer took 3.22 ms. Allocated memory is still 98.6 MB. Free memory is still 44.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:28:21,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 48.7 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 163.96 ms. Allocated memory is still 67.1 MB. Free memory was 47.2 MB in the beginning and 50.5 MB in the end (delta: -3.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.94 ms. Allocated memory is still 67.1 MB. Free memory was 50.5 MB in the beginning and 49.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.07 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 48.1 MB in the end (delta: 965.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 269.65 ms. Allocated memory is still 67.1 MB. Free memory was 48.1 MB in the beginning and 35.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 6914.47 ms. Allocated memory was 67.1 MB in the beginning and 98.6 MB in the end (delta: 31.5 MB). Free memory was 35.0 MB in the beginning and 44.4 MB in the end (delta: -9.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.22 ms. Allocated memory is still 98.6 MB. Free memory is still 44.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (0 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(y2) and consists of 6 locations. One deterministic module has affine ranking function y1 and consists of 5 locations. One nondeterministic module has affine ranking function y1 and consists of 5 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.8s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 5.5s. Construction of modules took 0.1s. Büchi inclusion checks took 1.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 12.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 18 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 52 SDtfs, 71 SDslu, 6 SDs, 0 SdLazy, 131 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 101.0ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital22 mio100 ax100 hnf96 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq177 hnf91 smp92 dnf100 smp100 tf106 neg98 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 31ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 16:28:21,080 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...