./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer --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 0.2.0-a4ecdab [2020-11-29 23:17:17,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:17:17,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:17:17,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:17:17,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:17:17,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:17:17,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:17:17,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:17:17,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:17:17,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:17:17,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:17:17,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:17:17,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:17:17,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:17:17,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:17:17,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:17:17,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:17:17,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:17:17,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:17:17,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:17:17,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:17:17,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:17:17,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:17:17,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:17:17,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:17:17,785 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:17:17,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:17:17,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:17:17,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:17:17,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:17:17,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:17:17,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:17:17,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:17:17,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:17:17,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:17:17,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:17:17,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:17:17,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:17:17,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:17:17,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:17:17,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:17:17,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 23:17:17,852 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:17:17,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:17:17,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:17:17,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:17:17,854 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:17:17,854 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 23:17:17,854 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 23:17:17,854 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 23:17:17,855 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 23:17:17,855 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 23:17:17,855 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 23:17:17,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:17:17,856 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:17:17,856 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:17:17,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:17:17,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:17:17,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:17:17,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 23:17:17,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 23:17:17,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 23:17:17,857 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:17:17,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:17:17,858 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 23:17:17,858 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:17:17,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 23:17:17,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:17:17,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:17:17,859 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 23:17:17,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:17:17,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:17:17,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:17:17,860 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 23:17:17,862 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 23:17:17,862 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:/tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6f4e1dd3818e9d3e8c54653af66359ead501b84 [2020-11-29 23:17:18,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:17:18,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:17:18,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:17:18,236 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:17:18,238 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:17:18,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/../../sv-benchmarks/c/recursive/gcd01-1.c [2020-11-29 23:17:18,319 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/data/d71bd7c04/b59bad7c3bba4eecb2cb06fd2243ac36/FLAGc336fa8ff [2020-11-29 23:17:18,891 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:17:18,892 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/sv-benchmarks/c/recursive/gcd01-1.c [2020-11-29 23:17:18,904 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/data/d71bd7c04/b59bad7c3bba4eecb2cb06fd2243ac36/FLAGc336fa8ff [2020-11-29 23:17:19,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/data/d71bd7c04/b59bad7c3bba4eecb2cb06fd2243ac36 [2020-11-29 23:17:19,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:17:19,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:17:19,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:17:19,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:17:19,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:17:19,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a95ed4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19, skipping insertion in model container [2020-11-29 23:17:19,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:17:19,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:17:19,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:17:19,558 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:17:19,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:17:19,589 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:17:19,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19 WrapperNode [2020-11-29 23:17:19,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:17:19,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:17:19,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:17:19,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:17:19,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:17:19,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:17:19,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:17:19,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:17:19,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... [2020-11-29 23:17:19,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:17:19,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:17:19,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:17:19,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:17:19,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-11-29 23:17:19,724 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-11-29 23:17:19,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:17:19,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:17:19,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:17:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:17:19,992 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:17:19,995 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 23:17:19,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:17:19 BoogieIcfgContainer [2020-11-29 23:17:19,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:17:19,998 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 23:17:19,998 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 23:17:20,002 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 23:17:20,003 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:17:20,003 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 11:17:19" (1/3) ... [2020-11-29 23:17:20,005 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@50eb49af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:17:20, skipping insertion in model container [2020-11-29 23:17:20,005 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:17:20,005 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:17:19" (2/3) ... [2020-11-29 23:17:20,006 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@50eb49af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:17:20, skipping insertion in model container [2020-11-29 23:17:20,006 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:17:20,006 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:17:19" (3/3) ... [2020-11-29 23:17:20,009 INFO L373 chiAutomizerObserver]: Analyzing ICFG gcd01-1.c [2020-11-29 23:17:20,072 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 23:17:20,072 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 23:17:20,072 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 23:17:20,072 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:17:20,072 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:17:20,072 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 23:17:20,072 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:17:20,073 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 23:17:20,086 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-11-29 23:17:20,109 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-29 23:17:20,109 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:17:20,110 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:17:20,115 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-11-29 23:17:20,115 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-29 23:17:20,115 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 23:17:20,115 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-11-29 23:17:20,118 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-29 23:17:20,118 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:17:20,118 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:17:20,118 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-11-29 23:17:20,119 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-29 23:17:20,124 INFO L794 eck$LassoCheckResult]: Stem: 14#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); 12#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; 15#L32true assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 24#L36true assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 8#L39true call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 3#gcdENTRYtrue [2020-11-29 23:17:20,125 INFO L796 eck$LassoCheckResult]: Loop: 3#gcdENTRYtrue ~y1 := #in~y1;~y2 := #in~y2; 13#L18true assume !(~y1 <= 0 || ~y2 <= 0); 10#L21true assume !(~y1 == ~y2); 4#L24true assume ~y1 > ~y2; 7#L25true call #t~ret7 := gcd(~y1 - ~y2, ~y2);< 3#gcdENTRYtrue [2020-11-29 23:17:20,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash 45873353, now seen corresponding path program 1 times [2020-11-29 23:17:20,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:17:20,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971631951] [2020-11-29 23:17:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:17:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:20,235 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:20,257 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:20,280 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:17:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash 28756389, now seen corresponding path program 1 times [2020-11-29 23:17:20,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:17:20,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130983971] [2020-11-29 23:17:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:17:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:20,292 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:20,299 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:20,301 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:17:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash 50269661, now seen corresponding path program 1 times [2020-11-29 23:17:20,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:17:20,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626907296] [2020-11-29 23:17:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:17:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:20,332 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:20,369 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:20,377 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:17:20,602 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:17:20,603 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:17:20,603 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:17:20,603 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:17:20,603 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:17:20,604 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:20,604 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:17:20,604 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:17:20,605 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration1_Loop [2020-11-29 23:17:20,605 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:17:20,607 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:17:20,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:20,633 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:20,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:20,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:20,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:20,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:20,747 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:17:20,749 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:20,763 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:17:20,763 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:17:20,772 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:17:20,773 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#res=0} Honda state: {gcd_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:20,815 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:17:20,815 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:20,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:17:20,857 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:17:20,976 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:17:20,978 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:17:20,978 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:17:20,978 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:17:20,978 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:17:20,978 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:17:20,979 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:20,979 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:17:20,979 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:17:20,979 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration1_Loop [2020-11-29 23:17:20,979 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:17:20,979 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:17:20,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:20,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:20,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:21,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:21,013 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:21,018 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:21,084 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:17:21,091 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:21,099 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:17:21,101 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:17:21,101 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:17:21,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:17:21,102 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:17:21,102 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:17:21,104 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:17:21,105 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:21,109 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:21,152 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:17:21,154 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:17:21,154 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:17:21,154 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:17:21,155 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:17:21,155 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:17:21,157 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:17:21,157 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:21,160 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:21,203 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:17:21,207 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:17:21,207 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:17:21,208 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:17:21,208 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:17:21,208 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:21,211 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:17:21,212 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:17:21,217 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:17:21,233 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 23:17:21,233 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:21,247 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:17:21,247 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:17:21,247 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:17:21,248 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_#in~y1) = 1*gcd_#in~y1 Supporting invariants [] Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:21,272 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:17:21,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:17:21,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:21,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:17:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:17:21,480 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 [2020-11-29 23:17:21,481 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states. Second operand 5 states. [2020-11-29 23:17:21,727 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 22 states.. Second operand 5 states. Result 95 states and 131 transitions. Complement of second has 30 states. [2020-11-29 23:17:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-29 23:17:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 23:17:21,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 25 transitions. [2020-11-29 23:17:21,733 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 5 letters. [2020-11-29 23:17:21,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:21,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 10 letters. Loop has 5 letters. [2020-11-29 23:17:21,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:21,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 10 letters. [2020-11-29 23:17:21,736 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:21,737 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 95 states and 131 transitions. [2020-11-29 23:17:21,747 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:17:21,752 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 95 states to 36 states and 41 transitions. [2020-11-29 23:17:21,753 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-29 23:17:21,754 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2020-11-29 23:17:21,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 41 transitions. [2020-11-29 23:17:21,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:17:21,755 INFO L691 BuchiCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-11-29 23:17:21,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states and 41 transitions. [2020-11-29 23:17:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 18. [2020-11-29 23:17:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 23:17:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-29 23:17:21,785 INFO L714 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-29 23:17:21,786 INFO L594 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-29 23:17:21,786 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 23:17:21,786 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 21 transitions. [2020-11-29 23:17:21,787 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:17:21,787 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:17:21,787 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:17:21,788 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-11-29 23:17:21,788 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-29 23:17:21,788 INFO L794 eck$LassoCheckResult]: Stem: 217#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); 205#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; 206#L32 assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 218#L36 assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 210#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 222#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 207#L18 [2020-11-29 23:17:21,788 INFO L796 eck$LassoCheckResult]: Loop: 207#L18 assume !(~y1 <= 0 || ~y2 <= 0); 209#L21 assume !(~y1 == ~y2); 219#L24 assume !(~y1 > ~y2); 208#L27 call #t~ret8 := gcd(~y1, ~y2 - ~y1);< 215#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 207#L18 [2020-11-29 23:17:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:21,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1422073943, now seen corresponding path program 1 times [2020-11-29 23:17:21,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:17:21,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267272873] [2020-11-29 23:17:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:17:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:21,808 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:21,837 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:21,858 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:17:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:21,859 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 1 times [2020-11-29 23:17:21,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:17:21,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433387074] [2020-11-29 23:17:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:17:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:21,869 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:21,877 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:21,879 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:17:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:21,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1558362436, now seen corresponding path program 1 times [2020-11-29 23:17:21,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:17:21,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779459218] [2020-11-29 23:17:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:17:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:21,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:21,947 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:21,952 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:17:22,082 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:17:22,082 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:17:22,082 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:17:22,082 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:17:22,083 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:17:22,083 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:22,083 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:17:22,083 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:17:22,083 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration2_Loop [2020-11-29 23:17:22,083 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:17:22,083 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:17:22,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:22,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:22,128 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:22,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:22,249 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-11-29 23:17:22,312 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:17:22,312 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:22,321 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:17:22,322 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:22,381 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:17:22,381 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:24,425 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:17:24,427 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:17:24,428 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:17:24,428 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:17:24,428 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:17:24,428 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:17:24,428 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:24,428 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:17:24,428 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:17:24,428 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration2_Loop [2020-11-29 23:17:24,428 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:17:24,428 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:17:24,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:24,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:24,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:24,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:24,587 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-11-29 23:17:24,636 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:17:24,636 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:24,650 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:17:24,653 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:17:24,653 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:17:24,653 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:17:24,653 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:17:24,654 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:17:24,659 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:17:24,660 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:24,667 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:17:24,673 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 23:17:24,673 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:24,682 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:17:24,682 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:17:24,682 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:17:24,683 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:24,725 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:17:24,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:17:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:17:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:17:24,886 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 [2020-11-29 23:17:24,886 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5 Second operand 4 states. [2020-11-29 23:17:24,931 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 54 states and 61 transitions. Complement of second has 11 states. [2020-11-29 23:17:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 23:17:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:17:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-29 23:17:24,935 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 5 letters. [2020-11-29 23:17:24,935 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:24,935 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-11-29 23:17:24,936 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:24,936 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 10 letters. [2020-11-29 23:17:24,936 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:24,936 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 61 transitions. [2020-11-29 23:17:24,940 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:17:24,942 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 33 states and 37 transitions. [2020-11-29 23:17:24,944 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-29 23:17:24,944 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-29 23:17:24,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 37 transitions. [2020-11-29 23:17:24,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:17:24,945 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-11-29 23:17:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 37 transitions. [2020-11-29 23:17:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-11-29 23:17:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 23:17:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-11-29 23:17:24,948 INFO L714 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-29 23:17:24,948 INFO L594 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-29 23:17:24,948 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 23:17:24,949 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 28 transitions. [2020-11-29 23:17:24,949 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:17:24,949 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:17:24,949 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:17:24,950 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:17:24,950 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-29 23:17:24,950 INFO L794 eck$LassoCheckResult]: Stem: 353#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); 339#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; 340#L32 assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 354#L36 assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 342#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 341#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 343#L18 assume !(~y1 <= 0 || ~y2 <= 0); 358#L21 assume !(~y1 == ~y2); 356#L24 assume ~y1 > ~y2; 347#L25 call #t~ret7 := gcd(~y1 - ~y2, ~y2);< 357#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 346#L18 [2020-11-29 23:17:24,950 INFO L796 eck$LassoCheckResult]: Loop: 346#L18 assume !(~y1 <= 0 || ~y2 <= 0); 349#L21 assume !(~y1 == ~y2); 355#L24 assume !(~y1 > ~y2); 348#L27 call #t~ret8 := gcd(~y1, ~y2 - ~y1);< 359#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 346#L18 [2020-11-29 23:17:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:24,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1558359491, now seen corresponding path program 2 times [2020-11-29 23:17:24,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:17:24,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020491227] [2020-11-29 23:17:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:17:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:24,966 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:24,978 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:24,983 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:17:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:24,984 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 2 times [2020-11-29 23:17:24,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:17:24,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55265055] [2020-11-29 23:17:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:17:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:24,988 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:25,001 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:25,003 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:17:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash -474042536, now seen corresponding path program 1 times [2020-11-29 23:17:25,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:17:25,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754138279] [2020-11-29 23:17:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:17:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:25,039 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:17:25,052 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:17:25,056 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:17:25,212 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:17:25,212 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:17:25,212 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:17:25,213 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:17:25,213 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:17:25,213 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:25,213 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:17:25,213 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:17:25,213 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration3_Loop [2020-11-29 23:17:25,213 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:17:25,213 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:17:25,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:25,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:25,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:25,244 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:25,369 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:17:25,369 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:25,375 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:17:25,375 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:25,379 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:17:25,379 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#t~ret7=0} Honda state: {gcd_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:25,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:17:25,403 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:25,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:17:25,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:17:25,941 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:17:25,943 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:17:25,943 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:17:25,943 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:17:25,943 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:17:25,943 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:17:25,943 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:25,943 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:17:25,944 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:17:25,944 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration3_Loop [2020-11-29 23:17:25,944 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:17:25,944 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:17:25,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:25,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:25,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:25,992 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:17:26,113 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:17:26,113 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:26,122 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:17:26,123 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:17:26,124 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:17:26,124 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:17:26,124 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:17:26,124 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:17:26,127 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:17:26,127 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:17:26,130 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:26,157 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:17:26,159 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:17:26,159 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:17:26,159 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:17:26,160 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:17:26,160 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:17:26,163 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:17:26,163 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 23:17:26,171 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:17:26,178 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 23:17:26,178 INFO L444 ModelExtractionUtils]: 4 out of 6 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ccf5eff3-d755-4e74-b6f8-3a8b86dc769e/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:17:26,183 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:17:26,183 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:17:26,183 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:17:26,183 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:17:26,224 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:17:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:17:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:26,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:17:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:17:26,429 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 [2020-11-29 23:17:26,429 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-29 23:17:26,472 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 46 states and 51 transitions. Complement of second has 11 states. [2020-11-29 23:17:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 23:17:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:17:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-29 23:17:26,476 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-11-29 23:17:26,476 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:26,476 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 23:17:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:26,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:17:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:17:26,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:17:26,637 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 23:17:26,637 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-29 23:17:26,670 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 46 states and 51 transitions. Complement of second has 11 states. [2020-11-29 23:17:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 23:17:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:17:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-29 23:17:26,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-11-29 23:17:26,672 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:26,672 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 23:17:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:17:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:17:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:17:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:17:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:17:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:17:26,837 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 3 loop predicates [2020-11-29 23:17:26,837 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-29 23:17:26,902 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 75 states and 86 transitions. Complement of second has 12 states. [2020-11-29 23:17:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 23:17:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:17:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-11-29 23:17:26,909 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 5 letters. [2020-11-29 23:17:26,909 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:26,909 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 16 letters. Loop has 5 letters. [2020-11-29 23:17:26,910 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:26,910 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 10 letters. [2020-11-29 23:17:26,911 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:17:26,911 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 75 states and 86 transitions. [2020-11-29 23:17:26,914 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:17:26,914 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 75 states to 0 states and 0 transitions. [2020-11-29 23:17:26,914 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 23:17:26,914 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 23:17:26,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 23:17:26,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:17:26,915 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:17:26,915 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:17:26,915 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:17:26,915 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 23:17:26,915 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 23:17:26,915 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:17:26,915 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 23:17:26,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 11:17:26 BoogieIcfgContainer [2020-11-29 23:17:26,931 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 23:17:26,932 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:17:26,932 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:17:26,932 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:17:26,933 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:17:19" (3/4) ... [2020-11-29 23:17:26,936 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 23:17:26,936 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:17:26,939 INFO L168 Benchmark]: Toolchain (without parser) took 7707.31 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 70.7 MB in the beginning and 67.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 33.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:17:26,940 INFO L168 Benchmark]: CDTParser took 0.93 ms. Allocated memory is still 104.9 MB. Free memory is still 86.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:17:26,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.00 ms. Allocated memory is still 104.9 MB. Free memory was 70.5 MB in the beginning and 82.6 MB in the end (delta: -12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:17:26,947 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.62 ms. Allocated memory is still 104.9 MB. Free memory was 82.6 MB in the beginning and 81.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:17:26,947 INFO L168 Benchmark]: Boogie Preprocessor took 20.12 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 80.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:17:26,948 INFO L168 Benchmark]: RCFGBuilder took 350.61 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 67.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:17:26,949 INFO L168 Benchmark]: BuchiAutomizer took 6933.42 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 67.6 MB in the beginning and 68.9 MB in the end (delta: -1.3 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:17:26,950 INFO L168 Benchmark]: Witness Printer took 4.43 ms. Allocated memory is still 134.2 MB. Free memory was 68.9 MB in the beginning and 67.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:17:26,960 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.93 ms. Allocated memory is still 104.9 MB. Free memory is still 86.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 359.00 ms. Allocated memory is still 104.9 MB. Free memory was 70.5 MB in the beginning and 82.6 MB in the end (delta: -12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.62 ms. Allocated memory is still 104.9 MB. Free memory was 82.6 MB in the beginning and 81.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.12 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 80.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 350.61 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 67.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 6933.42 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 67.6 MB in the beginning and 68.9 MB in the end (delta: -1.3 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.43 ms. Allocated memory is still 134.2 MB. Free memory was 68.9 MB in the beginning and 67.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. 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(y1) and consists of 7 locations. One deterministic module has affine ranking function y2 and consists of 4 locations. One nondeterministic module has affine ranking function y2 and consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.8s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 5.3s. Construction of modules took 0.2s. Büchi inclusion checks took 1.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 26 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, 77 SDslu, 9 SDs, 0 SdLazy, 124 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital26 mio100 ax100 hnf85 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq177 hnf91 smp89 dnf100 smp100 tf106 neg98 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...