./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/AlternKonv.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_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/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_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/AlternKonv.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/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_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/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 9816d5cc9e8c1fba9291af90498afaa319416e5c56fa3cf3ce8da9d63d3e9939 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 23:34:21,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:34:21,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:34:21,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:34:21,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:34:21,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:34:21,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:34:21,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:34:21,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:34:21,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:34:21,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:34:21,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:34:21,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:34:21,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:34:21,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:34:21,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:34:21,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:34:21,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:34:21,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:34:21,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:34:21,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:34:21,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:34:21,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:34:21,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:34:21,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:34:21,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:34:21,746 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:34:21,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:34:21,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:34:21,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:34:21,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:34:21,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:34:21,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:34:21,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:34:21,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:34:21,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:34:21,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:34:21,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:34:21,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:34:21,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:34:21,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:34:21,769 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 23:34:21,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:34:21,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:34:21,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:34:21,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:34:21,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:34:21,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:34:21,828 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:34:21,828 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 23:34:21,829 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 23:34:21,829 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 23:34:21,830 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 23:34:21,831 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 23:34:21,831 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 23:34:21,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:34:21,832 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:34:21,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:34:21,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:34:21,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 23:34:21,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 23:34:21,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 23:34:21,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:34:21,834 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 23:34:21,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:34:21,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 23:34:21,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:34:21,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:34:21,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:34:21,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:34:21,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:34:21,841 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 23:34:21,841 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_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9816d5cc9e8c1fba9291af90498afaa319416e5c56fa3cf3ce8da9d63d3e9939 [2021-10-28 23:34:22,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:34:22,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:34:22,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:34:22,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:34:22,267 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:34:22,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2021-10-28 23:34:22,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/data/9ad316552/b9e328cc0cb94e208b62befc99260f20/FLAG6e0ff2f45 [2021-10-28 23:34:23,002 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:34:23,003 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/sv-benchmarks/c/termination-restricted-15/AlternKonv.c [2021-10-28 23:34:23,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/data/9ad316552/b9e328cc0cb94e208b62befc99260f20/FLAG6e0ff2f45 [2021-10-28 23:34:23,365 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/data/9ad316552/b9e328cc0cb94e208b62befc99260f20 [2021-10-28 23:34:23,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:34:23,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:34:23,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:34:23,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:34:23,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:34:23,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba193bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23, skipping insertion in model container [2021-10-28 23:34:23,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:34:23,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:34:23,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:34:23,621 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:34:23,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:34:23,660 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:34:23,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23 WrapperNode [2021-10-28 23:34:23,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:34:23,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:34:23,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:34:23,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:34:23,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:34:23,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:34:23,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:34:23,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:34:23,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:34:23,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:34:23,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:34:23,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:34:23,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (1/1) ... [2021-10-28 23:34:23,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:23,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:23,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:34:23,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 23:34:23,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:34:23,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:34:24,065 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:34:24,066 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-28 23:34:24,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:34:24 BoogieIcfgContainer [2021-10-28 23:34:24,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:34:24,071 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 23:34:24,072 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 23:34:24,076 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 23:34:24,077 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:34:24,077 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 11:34:23" (1/3) ... [2021-10-28 23:34:24,079 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a6978f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:34:24, skipping insertion in model container [2021-10-28 23:34:24,080 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:34:24,080 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:34:23" (2/3) ... [2021-10-28 23:34:24,080 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a6978f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:34:24, skipping insertion in model container [2021-10-28 23:34:24,081 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:34:24,081 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:34:24" (3/3) ... [2021-10-28 23:34:24,083 INFO L389 chiAutomizerObserver]: Analyzing ICFG AlternKonv.c [2021-10-28 23:34:24,180 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 23:34:24,181 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 23:34:24,181 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 23:34:24,181 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 23:34:24,181 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 23:34:24,182 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 23:34:24,182 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 23:34:24,182 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 23:34:24,202 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-10-28 23:34:24,227 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:34:24,228 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:34:24,228 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:34:24,247 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:34:24,247 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 23:34:24,247 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 23:34:24,249 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2021-10-28 23:34:24,251 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:34:24,251 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:34:24,252 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:34:24,252 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:34:24,252 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 23:34:24,260 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 7#L18-2true [2021-10-28 23:34:24,261 INFO L793 eck$LassoCheckResult]: Loop: 7#L18-2true assume !!(0 != main_~i~0); 8#L10true assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 4#L18true assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 7#L18-2true [2021-10-28 23:34:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-28 23:34:24,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:24,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099136914] [2021-10-28 23:34:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:24,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:24,402 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:34:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:24,440 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:34:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash 40236, now seen corresponding path program 1 times [2021-10-28 23:34:24,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:24,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200357102] [2021-10-28 23:34:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:24,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:24,476 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:34:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:24,500 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:34:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:24,504 INFO L85 PathProgramCache]: Analyzing trace with hash 963757, now seen corresponding path program 1 times [2021-10-28 23:34:24,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:24,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661139149] [2021-10-28 23:34:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:24,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:24,526 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:34:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:24,546 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:34:24,698 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:34:24,699 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:34:24,699 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:34:24,699 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:34:24,699 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:34:24,700 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:24,700 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:34:24,700 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:34:24,700 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2021-10-28 23:34:24,701 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:34:24,701 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:34:24,731 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 23:34:24,756 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 23:34:24,766 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 23:34:24,872 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:34:24,873 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:34:24,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:24,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:24,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:34:24,888 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:34:24,888 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:34:24,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 23:34:24,931 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:34:24,932 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:34:24,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:24,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:24,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:24,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:34:24,992 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:34:24,992 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:34:25,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 23:34:25,027 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:34:25,027 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:34:25,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:25,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:25,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:25,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:34:25,084 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:34:25,084 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:34:25,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 23:34:25,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:25,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:25,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:25,165 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:34:25,172 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:34:25,172 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:34:25,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 23:34:25,342 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:34:25,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:25,347 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:34:25,347 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:34:25,347 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:34:25,348 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:34:25,348 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:34:25,348 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:25,348 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:34:25,348 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:34:25,348 INFO L133 ssoRankerPreferences]: Filename of dumped script: AlternKonv.c_Iteration1_Loop [2021-10-28 23:34:25,348 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:34:25,349 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:34:25,351 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 23:34:25,363 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 23:34:25,371 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 23:34:25,436 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:34:25,442 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:34:25,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:25,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:25,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:34:25,456 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 23:34:25,470 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:34:25,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:34:25,470 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:34:25,470 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:34:25,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 23:34:25,484 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:34:25,488 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:34:25,511 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:34:25,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:25,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:25,566 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:34:25,573 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 23:34:25,585 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:34:25,585 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:34:25,585 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:34:25,585 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:34:25,590 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:34:25,590 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:34:25,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 23:34:25,610 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:34:25,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:25,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:25,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:25,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:34:25,671 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 23:34:25,682 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:34:25,682 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:34:25,683 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:34:25,683 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:34:25,683 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:34:25,685 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:34:25,685 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:34:25,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 23:34:25,710 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:34:25,714 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 23:34:25,715 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 23:34:25,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:34:25,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:34:25,720 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:34:25,751 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:34:25,751 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:34:25,751 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:34:25,752 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-28 23:34:25,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 23:34:25,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:34:25,791 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:34:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:34:25,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:34:25,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:34:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:34:25,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:34:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:34:25,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2021-10-28 23:34:25,953 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 23:34:25,972 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-28 23:34:25,974 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-28 23:34:26,049 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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). Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) Result 31 states and 46 transitions. Complement of second has 6 states. [2021-10-28 23:34:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-28 23:34:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-28 23:34:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2021-10-28 23:34:26,055 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 1 letters. Loop has 3 letters. [2021-10-28 23:34:26,056 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:34:26,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 4 letters. Loop has 3 letters. [2021-10-28 23:34:26,057 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:34:26,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 1 letters. Loop has 6 letters. [2021-10-28 23:34:26,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:34:26,059 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 46 transitions. [2021-10-28 23:34:26,068 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:34:26,073 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 14 states and 21 transitions. [2021-10-28 23:34:26,075 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-10-28 23:34:26,076 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2021-10-28 23:34:26,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 21 transitions. [2021-10-28 23:34:26,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:34:26,077 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-10-28 23:34:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 21 transitions. [2021-10-28 23:34:26,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-10-28 23:34:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 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) [2021-10-28 23:34:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 20 transitions. [2021-10-28 23:34:26,112 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 20 transitions. [2021-10-28 23:34:26,112 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 20 transitions. [2021-10-28 23:34:26,112 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 23:34:26,112 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 20 transitions. [2021-10-28 23:34:26,114 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:34:26,114 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:34:26,114 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:34:26,115 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 23:34:26,115 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 23:34:26,116 INFO L791 eck$LassoCheckResult]: Stem: 84#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 85#L18-2 assume !!(0 != main_~i~0); 87#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 89#L12 [2021-10-28 23:34:26,116 INFO L793 eck$LassoCheckResult]: Loop: 89#L12 assume !(main_~i~0 < 0); 79#L18-2 assume !!(0 != main_~i~0); 90#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 89#L12 [2021-10-28 23:34:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:26,117 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-10-28 23:34:26,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:26,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319067176] [2021-10-28 23:34:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:26,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,131 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:34:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,139 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:34:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash 52217, now seen corresponding path program 1 times [2021-10-28 23:34:26,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:26,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820015092] [2021-10-28 23:34:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:26,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:34:26,209 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 23:34:26,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:34:26,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820015092] [2021-10-28 23:34:26,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820015092] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:34:26,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:34:26,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-28 23:34:26,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715882357] [2021-10-28 23:34:26,220 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:34:26,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:34:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:34:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:34:26,229 INFO L87 Difference]: Start difference. First operand 13 states and 20 transitions. cyclomatic complexity: 9 Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-10-28 23:34:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:34:26,275 INFO L93 Difference]: Finished difference Result 15 states and 22 transitions. [2021-10-28 23:34:26,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:34:26,277 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 22 transitions. [2021-10-28 23:34:26,281 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 23:34:26,282 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 15 states and 22 transitions. [2021-10-28 23:34:26,283 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 23:34:26,283 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-28 23:34:26,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 22 transitions. [2021-10-28 23:34:26,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:34:26,284 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2021-10-28 23:34:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 22 transitions. [2021-10-28 23:34:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 23:34:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 14 states have internal predecessors, (22), 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) [2021-10-28 23:34:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2021-10-28 23:34:26,291 INFO L704 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2021-10-28 23:34:26,291 INFO L587 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2021-10-28 23:34:26,291 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 23:34:26,292 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 22 transitions. [2021-10-28 23:34:26,296 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 23:34:26,296 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:34:26,296 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:34:26,297 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 23:34:26,297 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 23:34:26,297 INFO L791 eck$LassoCheckResult]: Stem: 118#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 119#L18-2 assume !!(0 != main_~i~0); 121#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 123#L12 [2021-10-28 23:34:26,298 INFO L793 eck$LassoCheckResult]: Loop: 123#L12 assume main_~i~0 < 0; 120#L13 assume !(main_~i~0 <= -2147483648);main_~i~0 := -1 * main_~i~0; 113#L18-2 assume !!(0 != main_~i~0); 126#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 123#L12 [2021-10-28 23:34:26,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:26,299 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 2 times [2021-10-28 23:34:26,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:26,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713643039] [2021-10-28 23:34:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:26,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,311 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:34:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,315 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:34:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:26,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1420681, now seen corresponding path program 1 times [2021-10-28 23:34:26,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:26,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804113228] [2021-10-28 23:34:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:26,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:34:26,391 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 23:34:26,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:34:26,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804113228] [2021-10-28 23:34:26,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804113228] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:34:26,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:34:26,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:34:26,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855148229] [2021-10-28 23:34:26,393 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:34:26,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:34:26,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:34:26,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:34:26,394 INFO L87 Difference]: Start difference. First operand 15 states and 22 transitions. cyclomatic complexity: 9 Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-28 23:34:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:34:26,437 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-10-28 23:34:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:34:26,438 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 27 transitions. [2021-10-28 23:34:26,440 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-10-28 23:34:26,442 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 20 states and 26 transitions. [2021-10-28 23:34:26,443 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2021-10-28 23:34:26,443 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-10-28 23:34:26,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2021-10-28 23:34:26,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:34:26,443 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-28 23:34:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2021-10-28 23:34:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-10-28 23:34:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 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) [2021-10-28 23:34:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2021-10-28 23:34:26,450 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2021-10-28 23:34:26,450 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2021-10-28 23:34:26,450 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 23:34:26,450 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2021-10-28 23:34:26,453 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-28 23:34:26,453 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:34:26,453 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:34:26,454 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:34:26,454 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2021-10-28 23:34:26,455 INFO L791 eck$LassoCheckResult]: Stem: 160#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 161#L18-2 assume !!(0 != main_~i~0); 164#L10 [2021-10-28 23:34:26,455 INFO L793 eck$LassoCheckResult]: Loop: 164#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 166#L12 assume !(main_~i~0 < 0); 163#L18-2 assume !!(0 != main_~i~0); 167#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 155#L18 assume main_~i~0 > 0;main_~i~0 := -1 * main_~i~0; 156#L18-2 assume !!(0 != main_~i~0); 164#L10 [2021-10-28 23:34:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-10-28 23:34:26,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:26,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678423566] [2021-10-28 23:34:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:26,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,464 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:34:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,476 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:34:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1281247432, now seen corresponding path program 1 times [2021-10-28 23:34:26,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:26,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97944096] [2021-10-28 23:34:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:26,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:34:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:34:26,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:34:26,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97944096] [2021-10-28 23:34:26,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97944096] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:34:26,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:34:26,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:34:26,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003310831] [2021-10-28 23:34:26,546 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:34:26,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:34:26,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:34:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:34:26,548 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. cyclomatic complexity: 8 Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-28 23:34:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:34:26,599 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-28 23:34:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:34:26,600 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-28 23:34:26,603 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 23:34:26,605 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-28 23:34:26,605 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2021-10-28 23:34:26,606 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2021-10-28 23:34:26,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-28 23:34:26,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:34:26,609 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-28 23:34:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-28 23:34:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2021-10-28 23:34:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 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) [2021-10-28 23:34:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-10-28 23:34:26,614 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-10-28 23:34:26,615 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-10-28 23:34:26,616 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 23:34:26,617 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2021-10-28 23:34:26,618 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:34:26,618 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:34:26,618 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:34:26,619 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:34:26,619 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1] [2021-10-28 23:34:26,619 INFO L791 eck$LassoCheckResult]: Stem: 204#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 205#L18-2 assume !!(0 != main_~i~0); 208#L10 [2021-10-28 23:34:26,619 INFO L793 eck$LassoCheckResult]: Loop: 208#L10 assume main_~i~0 < 0;main_~i~0 := 2 + main_~i~0; 210#L12 assume !(main_~i~0 < 0); 211#L18-2 assume !!(0 != main_~i~0); 209#L10 assume !(main_~i~0 < 0);main_~i~0 := main_~i~0 - 2; 202#L18 assume !(main_~i~0 > 0); 203#L18-2 assume !!(0 != main_~i~0); 208#L10 [2021-10-28 23:34:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 2 times [2021-10-28 23:34:26,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:26,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439329698] [2021-10-28 23:34:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:26,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,629 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:34:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,634 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:34:26,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1281247494, now seen corresponding path program 1 times [2021-10-28 23:34:26,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:26,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277412037] [2021-10-28 23:34:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:26,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,651 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:34:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,660 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:34:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:34:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash 614201903, now seen corresponding path program 1 times [2021-10-28 23:34:26,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:34:26,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402933224] [2021-10-28 23:34:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:34:26,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:34:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,673 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:34:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:34:26,689 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:34:26,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 11:34:26 BoogieIcfgContainer [2021-10-28 23:34:26,797 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 23:34:26,798 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:34:26,798 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:34:26,798 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:34:26,799 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:34:24" (3/4) ... [2021-10-28 23:34:26,802 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-28 23:34:26,855 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:34:26,855 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:34:26,857 INFO L168 Benchmark]: Toolchain (without parser) took 3486.27 ms. Allocated memory is still 109.1 MB. Free memory was 73.9 MB in the beginning and 56.1 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:26,858 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 109.1 MB. Free memory was 90.0 MB in the beginning and 90.0 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:34:26,861 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.06 ms. Allocated memory is still 109.1 MB. Free memory was 73.7 MB in the beginning and 88.0 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:26,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.28 ms. Allocated memory is still 109.1 MB. Free memory was 88.0 MB in the beginning and 86.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:34:26,862 INFO L168 Benchmark]: Boogie Preprocessor took 26.75 ms. Allocated memory is still 109.1 MB. Free memory was 86.7 MB in the beginning and 85.8 MB in the end (delta: 892.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:34:26,863 INFO L168 Benchmark]: RCFGBuilder took 330.96 ms. Allocated memory is still 109.1 MB. Free memory was 85.8 MB in the beginning and 77.5 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:26,863 INFO L168 Benchmark]: BuchiAutomizer took 2726.09 ms. Allocated memory is still 109.1 MB. Free memory was 77.5 MB in the beginning and 58.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 21.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:26,864 INFO L168 Benchmark]: Witness Printer took 57.19 ms. Allocated memory is still 109.1 MB. Free memory was 58.2 MB in the beginning and 56.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:34:26,869 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 109.1 MB. Free memory was 90.0 MB in the beginning and 90.0 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.06 ms. Allocated memory is still 109.1 MB. Free memory was 73.7 MB in the beginning and 88.0 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.28 ms. Allocated memory is still 109.1 MB. Free memory was 88.0 MB in the beginning and 86.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.75 ms. Allocated memory is still 109.1 MB. Free memory was 86.7 MB in the beginning and 85.8 MB in the end (delta: 892.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 330.96 ms. Allocated memory is still 109.1 MB. Free memory was 85.8 MB in the beginning and 77.5 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2726.09 ms. Allocated memory is still 109.1 MB. Free memory was 77.5 MB in the beginning and 58.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 21.8 MB. Max. memory is 16.1 GB. * Witness Printer took 57.19 ms. Allocated memory is still 109.1 MB. Free memory was 58.2 MB in the beginning and 56.1 MB in the end (delta: 2.0 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 4 terminating modules (3 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function i and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 4 locations. The remainder module has 16 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.6s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 1.9s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 16 states and ocurred in iteration 4. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 27 SDtfs, 9 SDslu, 6 SDs, 0 SdLazy, 73 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI3 SFLT1 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax200 hnf91 lsp45 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 68ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 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: 10]: 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@2086ed1e=0, \result=0, i=-1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 10]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() [L9] COND TRUE i != 0 Loop: [L10] COND TRUE i < 0 [L11] i = i+2 [L12] COND FALSE !(i < 0) [L9] COND TRUE i != 0 [L10] COND FALSE !(i < 0) [L17] i = i-2 [L18] COND FALSE !(i > 0) [L9] COND TRUE i != 0 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:34:26,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee9e1aaf-e90b-4885-acd8-333e6d3215a7/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...