./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 727b654585befeb7272249307a5de272b17c4e2d2d1afa67fd11f4eb185d7508 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:06:43,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:06:43,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:06:43,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:06:43,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:06:43,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:06:43,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:06:43,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:06:43,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:06:43,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:06:43,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:06:43,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:06:43,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:06:43,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:06:43,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:06:43,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:06:43,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:06:43,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:06:43,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:06:43,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:06:43,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:06:43,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:06:43,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:06:43,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:06:43,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:06:43,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:06:43,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:06:43,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:06:43,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:06:43,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:06:43,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:06:43,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:06:43,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:06:43,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:06:43,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:06:43,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:06:43,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:06:43,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:06:43,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:06:43,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:06:43,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:06:43,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 23:06:43,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:06:43,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:06:43,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:06:43,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:06:43,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:06:43,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:06:43,797 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:06:43,797 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 23:06:43,798 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 23:06:43,798 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 23:06:43,798 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 23:06:43,799 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 23:06:43,799 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 23:06:43,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:06:43,800 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:06:43,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:06:43,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:06:43,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 23:06:43,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 23:06:43,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 23:06:43,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:06:43,802 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 23:06:43,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:06:43,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 23:06:43,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:06:43,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:06:43,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:06:43,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:06:43,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:06:43,807 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 23:06:43,808 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_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 727b654585befeb7272249307a5de272b17c4e2d2d1afa67fd11f4eb185d7508 [2021-10-28 23:06:44,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:06:44,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:06:44,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:06:44,219 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:06:44,220 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:06:44,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2021-10-28 23:06:44,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/data/92b793777/bb4a9b34342644c285f52cafb76d475d/FLAG30b6f9d6b [2021-10-28 23:06:44,888 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:06:44,889 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2021-10-28 23:06:44,902 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/data/92b793777/bb4a9b34342644c285f52cafb76d475d/FLAG30b6f9d6b [2021-10-28 23:06:45,213 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/data/92b793777/bb4a9b34342644c285f52cafb76d475d [2021-10-28 23:06:45,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:06:45,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:06:45,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:06:45,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:06:45,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:06:45,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23333e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45, skipping insertion in model container [2021-10-28 23:06:45,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:06:45,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:06:45,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:06:45,469 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:06:45,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:06:45,501 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:06:45,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45 WrapperNode [2021-10-28 23:06:45,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:06:45,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:06:45,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:06:45,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:06:45,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:06:45,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:06:45,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:06:45,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:06:45,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:06:45,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:06:45,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:06:45,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:06:45,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (1/1) ... [2021-10-28 23:06:45,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:45,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:45,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:45,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 23:06:45,676 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-10-28 23:06:45,676 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-10-28 23:06:45,676 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-10-28 23:06:45,676 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-10-28 23:06:45,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:06:45,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:06:45,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:06:45,867 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 23:06:45,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:06:45 BoogieIcfgContainer [2021-10-28 23:06:45,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:06:45,871 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 23:06:45,872 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 23:06:45,876 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 23:06:45,877 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:06:45,877 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 11:06:45" (1/3) ... [2021-10-28 23:06:45,879 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@528a6db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:06:45, skipping insertion in model container [2021-10-28 23:06:45,879 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:06:45,880 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:06:45" (2/3) ... [2021-10-28 23:06:45,880 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@528a6db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:06:45, skipping insertion in model container [2021-10-28 23:06:45,881 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:06:45,881 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:06:45" (3/3) ... [2021-10-28 23:06:45,883 INFO L389 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a.c [2021-10-28 23:06:45,945 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 23:06:45,945 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 23:06:45,946 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 23:06:45,946 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 23:06:45,946 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 23:06:45,946 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 23:06:45,946 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 23:06:45,946 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 23:06:45,964 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 23:06:45,996 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-28 23:06:45,996 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:06:45,996 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:06:46,016 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:06:46,016 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:06:46,016 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 23:06:46,017 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 23:06:46,024 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-28 23:06:46,024 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:06:46,024 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:06:46,025 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:06:46,026 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:06:46,036 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 13#L26true call main_#t~ret5 := g(main_~x~0);< 14#gENTRYtrue [2021-10-28 23:06:46,036 INFO L793 eck$LassoCheckResult]: Loop: 14#gENTRYtrue ~x := #in~x; 7#L19true assume !(~x <= 0); 12#L20true call #t~ret2 := f(~x - 1);< 15#fENTRYtrue ~x := #in~x; 18#L13true assume !(~x <= 0); 10#L14true call #t~ret0 := g(~x);< 14#gENTRYtrue [2021-10-28 23:06:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1583, now seen corresponding path program 1 times [2021-10-28 23:06:46,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:46,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329004089] [2021-10-28 23:06:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:46,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:46,168 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:06:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:46,194 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:06:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1158035901, now seen corresponding path program 1 times [2021-10-28 23:06:46,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:46,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375257294] [2021-10-28 23:06:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:46,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:46,239 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:06:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:46,250 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:06:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash 734553451, now seen corresponding path program 1 times [2021-10-28 23:06:46,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:46,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541053921] [2021-10-28 23:06:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:46,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:46,270 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:06:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:46,295 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:06:46,610 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:06:46,610 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:06:46,611 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:06:46,611 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:06:46,611 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:06:46,611 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:46,611 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:06:46,612 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:06:46,612 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2021-10-28 23:06:46,612 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:06:46,612 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:06:46,639 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,656 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:46,838 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:06:46,840 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:06:46,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:46,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:46,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:46,852 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:06:46,853 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:06:46,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 23:06:46,889 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:06:46,889 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f_#res=0} Honda state: {f_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:06:46,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:46,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:46,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:46,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:06:46,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:06:46,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 23:06:46,980 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:06:46,981 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret2=0} Honda state: {g_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:06:47,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:47,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,041 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:06:47,041 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:06:47,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 23:06:47,068 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:06:47,069 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret3=0} Honda state: {g_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:06:47,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:47,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 23:06:47,123 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:06:47,124 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:06:47,156 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:06:47,157 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:06:47,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-10-28 23:06:47,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 23:06:47,209 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:06:47,211 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:06:47,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-10-28 23:06:47,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,270 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 23:06:47,274 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:06:47,274 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:06:47,374 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:06:47,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-10-28 23:06:47,379 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:06:47,379 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:06:47,379 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:06:47,379 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:06:47,379 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:06:47,380 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,380 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:06:47,380 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:06:47,380 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2021-10-28 23:06:47,380 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:06:47,380 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:06:47,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,395 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,403 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:06:47,493 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:06:47,500 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:06:47,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,514 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:06:47,527 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:06:47,528 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:06:47,529 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:06:47,529 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:06:47,529 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:06:47,533 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:06:47,533 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:06:47,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 23:06:47,545 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:06:47,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:47,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 23:06:47,597 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:06:47,607 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:06:47,607 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:06:47,607 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:06:47,608 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:06:47,608 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:06:47,610 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:06:47,610 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:06:47,627 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:06:47,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:47,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,672 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,678 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:06:47,690 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:06:47,690 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:06:47,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 23:06:47,690 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:06:47,690 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:06:47,691 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:06:47,693 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:06:47,693 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:06:47,724 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:06:47,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:47,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,860 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 23:06:47,889 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:06:47,899 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:06:47,899 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:06:47,900 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:06:47,900 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:06:47,900 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:06:47,901 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:06:47,901 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:06:47,913 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:06:47,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:47,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:47,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:47,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 23:06:47,949 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:06:47,959 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:06:47,959 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:06:47,959 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:06:47,959 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:06:47,960 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:06:47,961 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:06:47,961 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:06:47,977 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:06:48,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2021-10-28 23:06:48,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:48,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:48,006 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:48,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 23:06:48,008 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:06:48,018 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:06:48,018 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:06:48,018 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:06:48,019 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:06:48,019 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:06:48,028 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:06:48,028 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:06:48,040 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:06:48,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:48,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:48,077 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:48,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 23:06:48,088 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:06:48,100 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:06:48,100 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:06:48,100 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:06:48,100 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:06:48,100 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:06:48,102 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:06:48,102 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:06:48,140 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:06:48,153 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:06:48,153 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:06:48,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:06:48,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:06:48,156 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:06:48,163 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:06:48,163 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:06:48,164 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:06:48,164 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2021-10-28 23:06:48,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 23:06:48,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:06:48,218 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:06:48,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:06:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:48,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:06:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:06:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:06:48,526 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2021-10-28 23:06:48,528 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:48,791 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5). Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 62 states and 81 transitions. Complement of second has 24 states. [2021-10-28 23:06:48,792 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 [2021-10-28 23:06:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:06:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2021-10-28 23:06:48,797 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 6 letters. [2021-10-28 23:06:48,799 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:06:48,799 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 8 letters. Loop has 6 letters. [2021-10-28 23:06:48,800 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:06:48,800 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 12 letters. [2021-10-28 23:06:48,801 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:06:48,802 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2021-10-28 23:06:48,820 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-28 23:06:48,834 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 45 states and 59 transitions. [2021-10-28 23:06:48,835 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2021-10-28 23:06:48,836 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2021-10-28 23:06:48,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 59 transitions. [2021-10-28 23:06:48,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:06:48,839 INFO L681 BuchiCegarLoop]: Abstraction has 45 states and 59 transitions. [2021-10-28 23:06:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 59 transitions. [2021-10-28 23:06:48,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-10-28 23:06:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-10-28 23:06:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2021-10-28 23:06:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-10-28 23:06:48,910 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-10-28 23:06:48,910 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-10-28 23:06:48,910 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 23:06:48,910 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 56 transitions. [2021-10-28 23:06:48,915 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-28 23:06:48,916 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:06:48,916 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:06:48,918 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:48,918 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:48,918 INFO L791 eck$LassoCheckResult]: Stem: 178#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 177#L26 call main_#t~ret5 := g(main_~x~0);< 184#gENTRY ~x := #in~x; 176#L19 assume !(~x <= 0); 163#L20 call #t~ret2 := f(~x - 1);< 183#fENTRY ~x := #in~x; 188#L13 assume !(~x <= 0); 179#L14 call #t~ret0 := g(~x);< 180#gENTRY ~x := #in~x; 186#L19 assume ~x <= 0;#res := 0; 197#gFINAL assume true; 194#gEXIT >#26#return; 169#L14-1 [2021-10-28 23:06:48,918 INFO L793 eck$LassoCheckResult]: Loop: 169#L14-1 call #t~ret1 := g(1 + ~x);< 172#gENTRY ~x := #in~x; 173#L19 assume !(~x <= 0); 170#L20 call #t~ret2 := f(~x - 1);< 198#fENTRY ~x := #in~x; 196#L13 assume !(~x <= 0); 174#L14 call #t~ret0 := g(~x);< 172#gENTRY ~x := #in~x; 173#L19 assume ~x <= 0;#res := 0; 175#gFINAL assume true; 181#gEXIT >#26#return; 169#L14-1 [2021-10-28 23:06:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:48,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1661600137, now seen corresponding path program 1 times [2021-10-28 23:06:48,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:48,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346521965] [2021-10-28 23:06:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:48,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:49,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 23:06:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:06:49,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:49,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346521965] [2021-10-28 23:06:49,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346521965] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:49,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:06:49,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:06:49,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664188497] [2021-10-28 23:06:49,095 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:06:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1499912510, now seen corresponding path program 1 times [2021-10-28 23:06:49,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:49,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468307529] [2021-10-28 23:06:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:49,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:49,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 23:06:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:06:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:06:49,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:06:49,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468307529] [2021-10-28 23:06:49,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468307529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:06:49,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:06:49,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:06:49,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099628698] [2021-10-28 23:06:49,182 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:06:49,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:06:49,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:06:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:06:49,194 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. cyclomatic complexity: 14 Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:06:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:06:49,270 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-10-28 23:06:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:06:49,271 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 59 transitions. [2021-10-28 23:06:49,274 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-28 23:06:49,276 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 44 states and 55 transitions. [2021-10-28 23:06:49,276 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2021-10-28 23:06:49,277 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2021-10-28 23:06:49,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 55 transitions. [2021-10-28 23:06:49,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:06:49,278 INFO L681 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-10-28 23:06:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states and 55 transitions. [2021-10-28 23:06:49,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-28 23:06:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2021-10-28 23:06:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-10-28 23:06:49,285 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-10-28 23:06:49,286 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-10-28 23:06:49,286 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 23:06:49,286 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2021-10-28 23:06:49,288 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-28 23:06:49,288 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:06:49,288 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:06:49,290 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:49,290 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:06:49,291 INFO L791 eck$LassoCheckResult]: Stem: 289#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 290#L26 call main_#t~ret5 := g(main_~x~0);< 297#gENTRY ~x := #in~x; 298#L19 assume !(~x <= 0); 277#L20 call #t~ret2 := f(~x - 1);< 296#fENTRY ~x := #in~x; 307#L13 assume !(~x <= 0); 287#L14 call #t~ret0 := g(~x);< 292#gENTRY ~x := #in~x; 286#L19 assume !(~x <= 0); 273#L20 call #t~ret2 := f(~x - 1);< 295#fENTRY ~x := #in~x; 315#L13 assume ~x <= 0;#res := 0; 272#fFINAL assume true; 274#fEXIT >#30#return; 279#L20-1 call #t~ret3 := f(~x - 2);< 299#fENTRY ~x := #in~x; 300#L13 assume ~x <= 0;#res := 0; 305#fFINAL assume true; 314#fEXIT >#32#return; 306#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 293#gFINAL assume true; 294#gEXIT >#26#return; 282#L14-1 [2021-10-28 23:06:49,291 INFO L793 eck$LassoCheckResult]: Loop: 282#L14-1 call #t~ret1 := g(1 + ~x);< 285#gENTRY ~x := #in~x; 313#L19 assume !(~x <= 0); 284#L20 call #t~ret2 := f(~x - 1);< 310#fENTRY ~x := #in~x; 308#L13 assume !(~x <= 0); 291#L14 call #t~ret0 := g(~x);< 285#gENTRY ~x := #in~x; 313#L19 assume !(~x <= 0); 284#L20 call #t~ret2 := f(~x - 1);< 310#fENTRY ~x := #in~x; 308#L13 assume ~x <= 0;#res := 0; 309#fFINAL assume true; 312#fEXIT >#30#return; 283#L20-1 call #t~ret3 := f(~x - 2);< 310#fENTRY ~x := #in~x; 308#L13 assume ~x <= 0;#res := 0; 309#fFINAL assume true; 312#fEXIT >#32#return; 306#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 293#gFINAL assume true; 294#gEXIT >#26#return; 282#L14-1 [2021-10-28 23:06:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1603563642, now seen corresponding path program 1 times [2021-10-28 23:06:49,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:49,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174928050] [2021-10-28 23:06:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:49,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:49,306 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:06:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:49,326 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:06:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:49,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1170922075, now seen corresponding path program 1 times [2021-10-28 23:06:49,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:49,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174540052] [2021-10-28 23:06:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:49,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:49,356 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:06:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:49,371 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:06:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:06:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash 878037024, now seen corresponding path program 1 times [2021-10-28 23:06:49,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:06:49,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066501465] [2021-10-28 23:06:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:06:49,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:06:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:49,405 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:06:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:06:49,457 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:06:50,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 11:06:50 BoogieIcfgContainer [2021-10-28 23:06:50,561 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 23:06:50,562 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:06:50,562 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:06:50,562 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:06:50,563 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:06:45" (3/4) ... [2021-10-28 23:06:50,566 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-28 23:06:50,611 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:06:50,612 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:06:50,614 INFO L168 Benchmark]: Toolchain (without parser) took 5393.90 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 58.3 MB in the beginning and 76.3 MB in the end (delta: -18.0 MB). Peak memory consumption was 707.4 kB. Max. memory is 16.1 GB. [2021-10-28 23:06:50,614 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 92.3 MB. Free memory was 64.4 MB in the beginning and 64.4 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:06:50,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.47 ms. Allocated memory is still 92.3 MB. Free memory was 58.1 MB in the beginning and 70.3 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:06:50,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.79 ms. Allocated memory is still 92.3 MB. Free memory was 70.3 MB in the beginning and 69.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:06:50,616 INFO L168 Benchmark]: Boogie Preprocessor took 20.51 ms. Allocated memory is still 92.3 MB. Free memory was 69.0 MB in the beginning and 68.2 MB in the end (delta: 795.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:06:50,617 INFO L168 Benchmark]: RCFGBuilder took 308.01 ms. Allocated memory is still 92.3 MB. Free memory was 68.2 MB in the beginning and 60.2 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:06:50,617 INFO L168 Benchmark]: BuchiAutomizer took 4690.07 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 60.2 MB in the beginning and 78.4 MB in the end (delta: -18.2 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:06:50,618 INFO L168 Benchmark]: Witness Printer took 49.70 ms. Allocated memory is still 111.1 MB. Free memory was 78.4 MB in the beginning and 76.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:06:50,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 92.3 MB. Free memory was 64.4 MB in the beginning and 64.4 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.47 ms. Allocated memory is still 92.3 MB. Free memory was 58.1 MB in the beginning and 70.3 MB in the end (delta: -12.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.79 ms. Allocated memory is still 92.3 MB. Free memory was 70.3 MB in the beginning and 69.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.51 ms. Allocated memory is still 92.3 MB. Free memory was 69.0 MB in the beginning and 68.2 MB in the end (delta: 795.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 308.01 ms. Allocated memory is still 92.3 MB. Free memory was 68.2 MB in the beginning and 60.2 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4690.07 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 60.2 MB in the beginning and 78.4 MB in the end (delta: -18.2 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. * Witness Printer took 49.70 ms. Allocated memory is still 111.1 MB. Free memory was 78.4 MB in the beginning and 76.3 MB in the end (delta: 2.1 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 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 7 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 44 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.6s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 3.7s. Construction of modules took 0.1s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 44 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 26 SDtfs, 21 SDslu, 42 SDs, 0 SdLazy, 90 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 44ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 14]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6c81fb1a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@e0d3ec9=0, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5a8ced9b=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3814004a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@57766690=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@612e684e=0, NULL=0, x=1, \result=0, \old(x)=0, x=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L25] int x = __VERIFIER_nondet_int(); [L26] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) Loop: [L14] CALL g(x + 1) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:06:50,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03546705-fda9-47f5-b854-7ce3296f5fe8/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...