./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/GCD2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/GCD2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3 --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 f19bc75dcbe901d738916f7ca817c5a4f2f97f97 ..................................................................................................................................................................................................................................................................................... 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-5709675 [2021-10-15 19:19:06,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:19:06,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:19:06,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:19:06,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:19:06,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:19:06,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:19:06,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:19:06,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:19:06,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:19:06,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:19:06,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:19:06,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:19:06,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:19:06,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:19:06,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:19:06,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:19:06,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:19:06,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:19:06,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:19:06,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:19:06,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:19:06,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:19:06,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:19:06,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:19:06,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:19:06,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:19:06,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:19:06,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:19:06,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:19:06,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:19:06,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:19:06,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:19:06,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:19:06,722 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:19:06,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:19:06,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:19:06,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:19:06,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:19:06,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:19:06,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:19:06,727 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-15 19:19:06,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:19:06,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:19:06,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:19:06,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:19:06,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:19:06,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:19:06,797 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:19:06,798 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-15 19:19:06,798 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-15 19:19:06,798 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-15 19:19:06,799 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-15 19:19:06,800 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-15 19:19:06,800 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-15 19:19:06,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:19:06,801 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:19:06,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:19:06,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:19:06,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-15 19:19:06,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-15 19:19:06,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-15 19:19:06,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:19:06,803 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-15 19:19:06,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:19:06,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-15 19:19:06,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:19:06,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:19:06,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:19:06,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:19:06,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:19:06,806 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-15 19:19:06,806 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_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f19bc75dcbe901d738916f7ca817c5a4f2f97f97 [2021-10-15 19:19:07,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:19:07,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:19:07,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:19:07,172 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:19:07,173 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:19:07,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/termination-restricted-15/GCD2.c [2021-10-15 19:19:07,246 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/data/4933a8b98/c85422ff226f483e9ba450b1a8a951f7/FLAGe5bd6cc99 [2021-10-15 19:19:07,733 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:19:07,734 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/sv-benchmarks/c/termination-restricted-15/GCD2.c [2021-10-15 19:19:07,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/data/4933a8b98/c85422ff226f483e9ba450b1a8a951f7/FLAGe5bd6cc99 [2021-10-15 19:19:08,110 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/data/4933a8b98/c85422ff226f483e9ba450b1a8a951f7 [2021-10-15 19:19:08,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:19:08,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:19:08,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:19:08,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:19:08,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:19:08,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@183c435b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08, skipping insertion in model container [2021-10-15 19:19:08,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:19:08,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:19:08,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:19:08,347 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:19:08,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:19:08,392 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:19:08,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08 WrapperNode [2021-10-15 19:19:08,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:19:08,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:19:08,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:19:08,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:19:08,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:19:08,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:19:08,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:19:08,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:19:08,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:19:08,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:19:08,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:19:08,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:19:08,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (1/1) ... [2021-10-15 19:19:08,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:19:08,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:19:08,508 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:19:08,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-15 19:19:08,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:19:08,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:19:08,779 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:19:08,779 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-15 19:19:08,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:19:08 BoogieIcfgContainer [2021-10-15 19:19:08,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:19:08,787 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-15 19:19:08,787 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-15 19:19:08,791 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-15 19:19:08,792 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 19:19:08,793 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.10 07:19:08" (1/3) ... [2021-10-15 19:19:08,794 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@764a7593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.10 07:19:08, skipping insertion in model container [2021-10-15 19:19:08,795 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 19:19:08,795 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:19:08" (2/3) ... [2021-10-15 19:19:08,796 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@764a7593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.10 07:19:08, skipping insertion in model container [2021-10-15 19:19:08,796 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 19:19:08,796 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:19:08" (3/3) ... [2021-10-15 19:19:08,799 INFO L389 chiAutomizerObserver]: Analyzing ICFG GCD2.c [2021-10-15 19:19:08,892 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-15 19:19:08,892 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-15 19:19:08,892 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-15 19:19:08,892 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-15 19:19:08,893 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-15 19:19:08,893 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-15 19:19:08,893 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-15 19:19:08,893 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-15 19:19:08,909 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:08,929 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-15 19:19:08,929 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:19:08,929 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:19:08,936 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-15 19:19:08,936 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-15 19:19:08,936 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-15 19:19:08,937 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:19:08,938 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-10-15 19:19:08,938 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:19:08,938 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:19:08,939 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-15 19:19:08,939 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-15 19:19:08,947 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 8#L13-2true [2021-10-15 19:19:08,947 INFO L793 eck$LassoCheckResult]: Loop: 8#L13-2true assume !!((0 != main_~y~0 && main_~x~0 >= 0) && main_~y~0 >= 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 4#L17true assume main_~x~0 == main_~y~0;main_~y~0 := 0; 5#L21-3true main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 8#L13-2true [2021-10-15 19:19:08,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:08,954 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-15 19:19:08,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:08,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626536380] [2021-10-15 19:19:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:08,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:19:09,051 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:19:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:19:09,073 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:19:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash 39832, now seen corresponding path program 1 times [2021-10-15 19:19:09,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:09,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221303903] [2021-10-15 19:19:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:09,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:19:09,095 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:19:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:19:09,107 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:19:09,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:19:09,110 INFO L82 PathProgramCache]: Analyzing trace with hash 963353, now seen corresponding path program 1 times [2021-10-15 19:19:09,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:19:09,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140063937] [2021-10-15 19:19:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:19:09,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:19:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:19:09,122 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:19:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:19:09,132 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:19:09,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.10 07:19:09 BoogieIcfgContainer [2021-10-15 19:19:09,410 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-15 19:19:09,411 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:19:09,411 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:19:09,411 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:19:09,412 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:19:08" (3/4) ... [2021-10-15 19:19:09,414 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-15 19:19:09,501 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:19:09,501 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:19:09,503 INFO L168 Benchmark]: Toolchain (without parser) took 1387.12 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 45.8 MB in the beginning and 71.4 MB in the end (delta: -25.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:09,504 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory was 62.2 MB in the beginning and 62.1 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:09,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.68 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 45.6 MB in the beginning and 77.0 MB in the end (delta: -31.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:09,505 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.86 ms. Allocated memory is still 98.6 MB. Free memory was 76.8 MB in the beginning and 75.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:09,506 INFO L168 Benchmark]: Boogie Preprocessor took 24.31 ms. Allocated memory is still 98.6 MB. Free memory was 75.6 MB in the beginning and 74.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:19:09,507 INFO L168 Benchmark]: RCFGBuilder took 321.95 ms. Allocated memory is still 98.6 MB. Free memory was 74.6 MB in the beginning and 66.7 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:09,508 INFO L168 Benchmark]: BuchiAutomizer took 623.14 ms. Allocated memory is still 98.6 MB. Free memory was 66.7 MB in the beginning and 73.1 MB in the end (delta: -6.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:09,509 INFO L168 Benchmark]: Witness Printer took 90.20 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 71.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:19:09,514 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory was 62.2 MB in the beginning and 62.1 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 246.68 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 45.6 MB in the beginning and 77.0 MB in the end (delta: -31.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.86 ms. Allocated memory is still 98.6 MB. Free memory was 76.8 MB in the beginning and 75.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.31 ms. Allocated memory is still 98.6 MB. Free memory was 75.6 MB in the beginning and 74.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 321.95 ms. Allocated memory is still 98.6 MB. Free memory was 74.6 MB in the beginning and 66.7 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 623.14 ms. Allocated memory is still 98.6 MB. Free memory was 66.7 MB in the beginning and 73.1 MB in the end (delta: -6.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Witness Printer took 90.20 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 71.4 MB in the end (delta: 1.7 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 Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.5s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: No data available LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: 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 {xtmp=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7ab38105=0, tmp=1, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1d3b6642=0, x=1, y=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int x; [L7] int y; [L8] int tmp; [L9] int xtmp; [L10] x = __VERIFIER_nondet_int() [L11] y = __VERIFIER_nondet_int() Loop: [L13] COND TRUE (y != 0 && x >= 0) && y >= 0 [L14] tmp = y [L15] xtmp = x [L17] COND TRUE x == y [L18] y = 0 [L26] y = xtmp [L27] x = tmp End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:19:09,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4eb49e0a-430f-4b88-83b5-23aca131976d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...