./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/Piecewise.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_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/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_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/Piecewise.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/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_91ebda65-8d6e-48da-8389-04be894e87ca/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 ac2fbc3b92c237eee672d002679ee7a51e4ecff20f91c05c8145e18adc82f593 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:27:37,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:27:37,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:27:37,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:27:37,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:27:37,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:27:37,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:27:37,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:27:37,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:27:37,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:27:37,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:27:37,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:27:37,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:27:37,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:27:37,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:27:37,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:27:37,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:27:37,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:27:37,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:27:37,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:27:37,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:27:37,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:27:37,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:27:37,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:27:37,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:27:37,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:27:37,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:27:37,976 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:27:37,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:27:37,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:27:37,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:27:37,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:27:37,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:27:37,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:27:37,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:27:37,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:27:37,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:27:37,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:27:37,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:27:37,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:27:37,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:27:37,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 23:27:38,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:27:38,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:27:38,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:27:38,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:27:38,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:27:38,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:27:38,057 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:27:38,058 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 23:27:38,058 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 23:27:38,058 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 23:27:38,060 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 23:27:38,060 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 23:27:38,060 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 23:27:38,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:27:38,061 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:27:38,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:27:38,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:27:38,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 23:27:38,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 23:27:38,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 23:27:38,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:27:38,063 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 23:27:38,063 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:27:38,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 23:27:38,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:27:38,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:27:38,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:27:38,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:27:38,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:27:38,068 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 23:27:38,069 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_91ebda65-8d6e-48da-8389-04be894e87ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac2fbc3b92c237eee672d002679ee7a51e4ecff20f91c05c8145e18adc82f593 [2021-10-28 23:27:38,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:27:38,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:27:38,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:27:38,452 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:27:38,452 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:27:38,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/termination-crafted/Piecewise.c [2021-10-28 23:27:38,557 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/data/9faa07001/63162f357ad64553ad0ffb774d38ff1b/FLAG78c839351 [2021-10-28 23:27:39,137 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:27:39,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/sv-benchmarks/c/termination-crafted/Piecewise.c [2021-10-28 23:27:39,151 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/data/9faa07001/63162f357ad64553ad0ffb774d38ff1b/FLAG78c839351 [2021-10-28 23:27:39,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/data/9faa07001/63162f357ad64553ad0ffb774d38ff1b [2021-10-28 23:27:39,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:27:39,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:27:39,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:27:39,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:27:39,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:27:39,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ead789a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39, skipping insertion in model container [2021-10-28 23:27:39,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:27:39,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:27:39,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:27:39,774 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:27:39,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:27:39,804 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:27:39,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39 WrapperNode [2021-10-28 23:27:39,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:27:39,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:27:39,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:27:39,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:27:39,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:27:39,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:27:39,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:27:39,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:27:39,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:27:39,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:27:39,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:27:39,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:27:39,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (1/1) ... [2021-10-28 23:27:39,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:39,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:39,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:39,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 23:27:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:27:39,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:27:40,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:27:40,171 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-28 23:27:40,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:27:40 BoogieIcfgContainer [2021-10-28 23:27:40,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:27:40,176 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 23:27:40,177 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 23:27:40,181 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 23:27:40,182 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:27:40,182 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 11:27:39" (1/3) ... [2021-10-28 23:27:40,184 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7dcd2482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:27:40, skipping insertion in model container [2021-10-28 23:27:40,184 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:27:40,185 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:27:39" (2/3) ... [2021-10-28 23:27:40,185 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7dcd2482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:27:40, skipping insertion in model container [2021-10-28 23:27:40,185 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:27:40,186 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:27:40" (3/3) ... [2021-10-28 23:27:40,187 INFO L389 chiAutomizerObserver]: Analyzing ICFG Piecewise.c [2021-10-28 23:27:40,267 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 23:27:40,268 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 23:27:40,268 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 23:27:40,268 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 23:27:40,268 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 23:27:40,269 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 23:27:40,269 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 23:27:40,269 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 23:27:40,286 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 23:27:40,312 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:27:40,313 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:27:40,313 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:27:40,323 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:27:40,324 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 23:27:40,324 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 23:27:40,325 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 23:27:40,326 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:27:40,327 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:27:40,327 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:27:40,327 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:27:40,328 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 23:27:40,336 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 5#L26-2true [2021-10-28 23:27:40,336 INFO L793 eck$LassoCheckResult]: Loop: 5#L26-2true assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 6#L23true assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 5#L26-2true [2021-10-28 23:27:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-28 23:27:40,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:40,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973258846] [2021-10-28 23:27:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:40,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:40,468 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:40,503 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:40,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:40,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-10-28 23:27:40,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:40,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316904707] [2021-10-28 23:27:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:40,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:40,536 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:40,555 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-10-28 23:27:40,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:40,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564960553] [2021-10-28 23:27:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:40,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:40,581 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:40,601 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:40,734 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:40,735 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:40,735 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:40,735 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:40,736 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:27:40,736 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:40,736 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:40,736 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:40,737 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2021-10-28 23:27:40,737 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:40,737 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:40,758 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 23:27:40,768 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 23:27:40,772 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 23:27:40,854 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:40,855 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:27:40,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:40,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:40,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:40,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:40,892 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:40,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 23:27:40,923 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:27:40,923 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 23:27:40,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:40,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:40,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:40,976 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:40,985 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:40,985 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:40,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 23:27:41,020 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:27:41,021 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 23:27:41,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:41,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:41,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:41,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:41,075 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:41,075 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:41,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 23:27:41,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:41,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:41,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:41,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:41,173 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:27:41,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:41,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 23:27:41,255 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:27:41,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:41,260 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:41,261 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:41,261 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:41,261 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:41,261 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:27:41,261 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:41,262 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:41,262 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:41,262 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2021-10-28 23:27:41,262 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:41,262 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:41,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:27:41,270 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 23:27:41,274 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 23:27:41,335 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:41,341 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:27:41,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:41,344 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:41,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 23:27:41,354 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 23:27:41,365 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:41,365 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:41,365 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:41,365 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:41,375 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:27:41,376 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:27:41,389 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:27:41,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:41,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:41,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:41,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:41,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 23:27:41,426 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 23:27:41,435 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:41,436 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:41,436 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:41,436 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:41,440 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:27:41,440 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:27:41,473 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:27:41,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:41,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:41,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:41,498 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:41,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 23:27:41,505 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 23:27:41,513 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:41,513 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:27:41,514 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:41,514 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:41,514 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:41,516 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:27:41,517 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:27:41,534 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:27:41,538 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 23:27:41,539 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 23:27:41,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:41,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:41,542 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:41,548 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:27:41,549 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:27:41,549 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:27:41,549 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-10-28 23:27:41,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 23:27:41,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:41,578 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:27:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:41,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:27:41,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:41,659 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 23:27:41,697 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 23:27:41,698 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 3 states, 3 states have (on average 1.0) 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 23:27:41,768 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 3 states, 3 states have (on average 1.0) 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) Result 37 states and 48 transitions. Complement of second has 8 states. [2021-10-28 23:27:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) 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 23:27:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2021-10-28 23:27:41,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 2 letters. [2021-10-28 23:27:41,774 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:41,775 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 3 letters. Loop has 2 letters. [2021-10-28 23:27:41,775 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:41,775 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 4 letters. [2021-10-28 23:27:41,776 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:41,777 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 48 transitions. [2021-10-28 23:27:41,781 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 23:27:41,785 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 13 states and 19 transitions. [2021-10-28 23:27:41,787 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-10-28 23:27:41,787 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-10-28 23:27:41,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2021-10-28 23:27:41,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:27:41,789 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-10-28 23:27:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2021-10-28 23:27:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-28 23:27:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 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 23:27:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2021-10-28 23:27:41,818 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-10-28 23:27:41,818 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-10-28 23:27:41,818 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 23:27:41,818 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2021-10-28 23:27:41,819 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-10-28 23:27:41,819 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:27:41,819 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:27:41,820 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-28 23:27:41,820 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 23:27:41,820 INFO L791 eck$LassoCheckResult]: Stem: 82#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 83#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 85#L23 [2021-10-28 23:27:41,821 INFO L793 eck$LassoCheckResult]: Loop: 85#L23 assume !(main_~q~0 < main_~p~0); 88#L26 assume !(main_~p~0 < main_~q~0); 84#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 85#L23 [2021-10-28 23:27:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-10-28 23:27:41,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:41,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89205607] [2021-10-28 23:27:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:41,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:41,828 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:41,834 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:41,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:41,835 INFO L85 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2021-10-28 23:27:41,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:41,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066106673] [2021-10-28 23:27:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:41,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:41,880 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 23:27:41,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:27:41,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066106673] [2021-10-28 23:27:41,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066106673] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:27:41,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:27:41,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:27:41,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769693906] [2021-10-28 23:27:41,885 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:27:41,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:27:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:27:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:27:41,890 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 23:27:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:27:41,969 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2021-10-28 23:27:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:27:41,970 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2021-10-28 23:27:41,971 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:27:41,972 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 12 transitions. [2021-10-28 23:27:41,972 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-10-28 23:27:41,972 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-28 23:27:41,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2021-10-28 23:27:41,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:27:41,973 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-10-28 23:27:41,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2021-10-28 23:27:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-10-28 23:27:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 23:27:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-10-28 23:27:41,988 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-10-28 23:27:41,988 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-10-28 23:27:41,989 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 23:27:41,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-10-28 23:27:41,989 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:27:41,990 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:27:41,990 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:27:41,990 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 23:27:41,990 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 23:27:41,991 INFO L791 eck$LassoCheckResult]: Stem: 114#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 115#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 119#L23 assume !(main_~q~0 < main_~p~0); 121#L26 [2021-10-28 23:27:41,991 INFO L793 eck$LassoCheckResult]: Loop: 121#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 116#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 117#L23 assume !(main_~q~0 < main_~p~0); 121#L26 [2021-10-28 23:27:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:41,993 INFO L85 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-10-28 23:27:41,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:41,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789430755] [2021-10-28 23:27:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:41,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:42,007 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:42,016 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:42,018 INFO L85 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2021-10-28 23:27:42,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:42,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245613177] [2021-10-28 23:27:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:42,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:42,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:42,039 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:42,048 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2021-10-28 23:27:42,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:42,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898975294] [2021-10-28 23:27:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:42,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:42,061 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:42,085 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:42,176 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:42,177 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:42,177 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:42,177 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:42,177 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:27:42,177 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:42,178 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:42,178 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:42,178 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2021-10-28 23:27:42,178 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:42,178 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:42,183 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 23:27:42,187 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 23:27:42,209 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 23:27:42,321 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:42,322 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:27:42,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:42,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:42,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:42,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:42,327 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:42,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 23:27:42,360 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:27:42,360 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:27:42,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:42,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:42,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:42,400 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:42,410 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:42,410 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:42,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 23:27:42,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:42,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:42,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:42,490 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:42,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:27:42,498 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:42,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 23:27:42,748 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:27:42,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:42,756 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:42,756 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:42,756 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:42,756 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:42,756 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:27:42,756 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:42,756 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:42,757 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:42,757 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2021-10-28 23:27:42,757 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:42,757 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:42,758 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 23:27:42,765 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 23:27:42,780 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 23:27:42,894 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:42,894 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:27:42,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:42,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:42,896 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:42,900 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 23:27:42,909 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:42,910 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:42,910 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:42,910 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:42,915 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:27:42,915 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:27:42,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 23:27:42,929 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:27:42,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:42,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:42,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:42,962 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:42,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 23:27:42,968 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 23:27:42,979 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:42,979 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:27:42,979 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:42,979 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:42,979 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:42,982 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:27:42,982 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:27:42,999 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:27:43,004 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:27:43,004 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:27:43,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:43,011 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:43,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 23:27:43,015 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:27:43,016 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:27:43,016 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:27:43,016 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-10-28 23:27:43,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:43,052 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:27:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:43,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:43,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:43,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:27:43,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:43,171 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 23:27:43,174 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:27:43,174 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 23:27:43,201 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) Result 16 states and 20 transitions. Complement of second has 7 states. [2021-10-28 23:27:43,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:43,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 23:27:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-10-28 23:27:43,205 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2021-10-28 23:27:43,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:43,207 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2021-10-28 23:27:43,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:43,207 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2021-10-28 23:27:43,208 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:43,208 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 20 transitions. [2021-10-28 23:27:43,210 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:27:43,211 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 13 states and 17 transitions. [2021-10-28 23:27:43,212 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-10-28 23:27:43,212 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-10-28 23:27:43,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2021-10-28 23:27:43,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:27:43,212 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-10-28 23:27:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2021-10-28 23:27:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-28 23:27:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 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 23:27:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-10-28 23:27:43,217 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-10-28 23:27:43,217 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-10-28 23:27:43,217 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 23:27:43,217 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2021-10-28 23:27:43,220 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:27:43,220 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:27:43,220 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:27:43,222 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-10-28 23:27:43,222 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 23:27:43,223 INFO L791 eck$LassoCheckResult]: Stem: 181#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 182#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 186#L23 assume !(main_~q~0 < main_~p~0); 192#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 190#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 191#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 183#L26-2 [2021-10-28 23:27:43,223 INFO L793 eck$LassoCheckResult]: Loop: 183#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 184#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 183#L26-2 [2021-10-28 23:27:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2021-10-28 23:27:43,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:43,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047800537] [2021-10-28 23:27:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:43,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,236 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,244 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-10-28 23:27:43,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:43,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239023463] [2021-10-28 23:27:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:43,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,249 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,253 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:43,254 INFO L85 PathProgramCache]: Analyzing trace with hash 666829459, now seen corresponding path program 2 times [2021-10-28 23:27:43,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:43,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167823003] [2021-10-28 23:27:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:43,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,263 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,273 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:43,328 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:43,328 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:43,328 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:43,328 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:43,329 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:27:43,329 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:43,329 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:43,329 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:43,329 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2021-10-28 23:27:43,329 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:43,330 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:43,331 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 23:27:43,349 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 23:27:43,352 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 23:27:43,425 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:43,426 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:27:43,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:43,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:43,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:43,435 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:43,435 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:43,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 23:27:43,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:43,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:43,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:43,509 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:43,517 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:27:43,517 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:43,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 23:27:43,595 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:27:43,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:43,604 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:43,604 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:43,604 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:43,604 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:43,604 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:27:43,604 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:43,604 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:43,604 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:43,604 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2021-10-28 23:27:43,604 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:43,605 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:43,606 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 23:27:43,618 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 23:27:43,621 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 23:27:43,675 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:43,675 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:27:43,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:43,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:43,677 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:43,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 23:27:43,683 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 23:27:43,694 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:43,694 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:27:43,694 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:43,694 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:43,694 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:43,696 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:27:43,696 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:27:43,719 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:27:43,724 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:27:43,724 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:27:43,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:43,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:43,753 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:43,759 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:27:43,759 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:27:43,759 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:27:43,759 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-10-28 23:27:43,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-28 23:27:43,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:43,808 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:27:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:43,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:43,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:27:43,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:43,886 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 23:27:43,887 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 23:27:43,887 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 23:27:43,903 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 27 states and 34 transitions. Complement of second has 5 states. [2021-10-28 23:27:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 23:27:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-10-28 23:27:43,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2021-10-28 23:27:43,904 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:43,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-10-28 23:27:43,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:43,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2021-10-28 23:27:43,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:43,905 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 34 transitions. [2021-10-28 23:27:43,907 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:27:43,908 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 23 states and 30 transitions. [2021-10-28 23:27:43,908 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-10-28 23:27:43,908 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-10-28 23:27:43,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2021-10-28 23:27:43,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:27:43,909 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-10-28 23:27:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2021-10-28 23:27:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-10-28 23:27:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 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 23:27:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-10-28 23:27:43,912 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-10-28 23:27:43,912 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-10-28 23:27:43,912 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 23:27:43,912 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 28 transitions. [2021-10-28 23:27:43,913 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-10-28 23:27:43,913 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:27:43,913 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:27:43,914 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2021-10-28 23:27:43,914 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-28 23:27:43,914 INFO L791 eck$LassoCheckResult]: Stem: 265#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 266#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 283#L23 assume !(main_~q~0 < main_~p~0); 281#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 280#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 275#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 267#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 269#L23 assume !(main_~q~0 < main_~p~0); 271#L26 [2021-10-28 23:27:43,914 INFO L793 eck$LassoCheckResult]: Loop: 271#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 278#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 279#L23 assume !(main_~q~0 < main_~p~0); 271#L26 [2021-10-28 23:27:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:43,915 INFO L85 PathProgramCache]: Analyzing trace with hash 666829461, now seen corresponding path program 3 times [2021-10-28 23:27:43,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:43,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287057827] [2021-10-28 23:27:43,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:43,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,924 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,933 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:43,934 INFO L85 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 2 times [2021-10-28 23:27:43,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:43,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259563930] [2021-10-28 23:27:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:43,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,939 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,943 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:43,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1292746274, now seen corresponding path program 4 times [2021-10-28 23:27:43,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:43,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208005995] [2021-10-28 23:27:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:43,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,953 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:43,963 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:44,006 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:44,006 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:44,006 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:44,006 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:44,006 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:27:44,006 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:44,006 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:44,007 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:44,007 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2021-10-28 23:27:44,007 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:44,007 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:44,008 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 23:27:44,016 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 23:27:44,034 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 23:27:44,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:44,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:44,233 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:44,234 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:27:44,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:44,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:44,250 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:44,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-28 23:27:44,292 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:44,292 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:44,322 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:27:44,322 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:27:44,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:44,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:44,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:44,368 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:44,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:44,378 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:44,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-28 23:27:44,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2021-10-28 23:27:44,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:44,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:44,420 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:44,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:27:44,436 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:44,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-28 23:27:44,645 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:27:44,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2021-10-28 23:27:44,648 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:44,648 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:44,649 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:44,649 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:44,649 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:27:44,649 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:44,649 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:44,649 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:44,649 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2021-10-28 23:27:44,649 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:44,649 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:44,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:27:44,681 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 23:27:44,683 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 23:27:44,751 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:44,752 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:27:44,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:44,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:44,753 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:44,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-28 23:27:44,757 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 23:27:44,767 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:44,768 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:27:44,768 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:44,768 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:44,768 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:44,770 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:27:44,770 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:27:44,791 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:27:44,808 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 23:27:44,808 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 23:27:44,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:44,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:44,809 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:44,816 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:27:44,816 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:27:44,816 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:27:44,816 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-10-28 23:27:44,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-28 23:27:44,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:44,857 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:27:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:44,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:44,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:27:44,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:44,960 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 23:27:44,961 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:27:44,961 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 23:27:44,979 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 28 states and 35 transitions. Complement of second has 7 states. [2021-10-28 23:27:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 23:27:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-10-28 23:27:44,981 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 3 letters. [2021-10-28 23:27:44,981 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:44,981 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:27:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:45,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:45,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:45,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:27:45,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:45,073 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 23:27:45,075 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:27:45,075 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 23:27:45,109 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 25 states and 34 transitions. Complement of second has 7 states. [2021-10-28 23:27:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 23:27:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2021-10-28 23:27:45,115 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 8 letters. Loop has 3 letters. [2021-10-28 23:27:45,115 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:45,115 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:27:45,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:45,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:45,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:27:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:45,224 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 23:27:45,226 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:27:45,226 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 23:27:45,251 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 34 states and 42 transitions. Complement of second has 6 states. [2021-10-28 23:27:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 23:27:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2021-10-28 23:27:45,254 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 3 letters. [2021-10-28 23:27:45,254 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:45,254 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 11 letters. Loop has 3 letters. [2021-10-28 23:27:45,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:45,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 6 letters. [2021-10-28 23:27:45,259 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:45,260 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 42 transitions. [2021-10-28 23:27:45,264 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-10-28 23:27:45,265 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 25 states and 33 transitions. [2021-10-28 23:27:45,265 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-10-28 23:27:45,265 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-10-28 23:27:45,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 33 transitions. [2021-10-28 23:27:45,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:27:45,266 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-10-28 23:27:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 33 transitions. [2021-10-28 23:27:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-10-28 23:27:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 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 23:27:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-10-28 23:27:45,270 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-10-28 23:27:45,270 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-10-28 23:27:45,270 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 23:27:45,271 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 21 transitions. [2021-10-28 23:27:45,273 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-28 23:27:45,273 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:27:45,273 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:27:45,274 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2021-10-28 23:27:45,274 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2021-10-28 23:27:45,274 INFO L791 eck$LassoCheckResult]: Stem: 516#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 517#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 519#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 524#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 522#L23 assume !(main_~q~0 < main_~p~0); 523#L26 [2021-10-28 23:27:45,274 INFO L793 eck$LassoCheckResult]: Loop: 523#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 520#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 521#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 528#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 529#L23 assume !(main_~q~0 < main_~p~0); 523#L26 [2021-10-28 23:27:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash 29863400, now seen corresponding path program 1 times [2021-10-28 23:27:45,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:45,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140010346] [2021-10-28 23:27:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:45,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:45,307 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:45,313 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash 45563257, now seen corresponding path program 1 times [2021-10-28 23:27:45,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:45,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163580190] [2021-10-28 23:27:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:45,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:45,325 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:45,334 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:45,337 INFO L85 PathProgramCache]: Analyzing trace with hash -974968846, now seen corresponding path program 5 times [2021-10-28 23:27:45,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:45,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187508214] [2021-10-28 23:27:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:45,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:45,349 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:45,370 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:45,466 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:45,466 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:45,466 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:45,466 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:45,467 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:27:45,467 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:45,467 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:45,467 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:45,467 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2021-10-28 23:27:45,467 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:45,468 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:45,471 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 23:27:45,474 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 23:27:45,478 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 23:27:45,572 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:45,572 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:27:45,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:45,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:45,576 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:45,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-28 23:27:45,579 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:45,579 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:45,608 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:27:45,608 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:27:45,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-10-28 23:27:45,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:45,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:45,632 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:45,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-28 23:27:45,635 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:45,635 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:45,650 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:27:45,650 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:27:45,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:45,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:45,698 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:45,704 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:45,704 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:45,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-28 23:27:45,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:45,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:45,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:45,772 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:45,775 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:27:45,775 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:45,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-28 23:27:46,042 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:27:46,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:46,048 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:46,048 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:46,048 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:46,048 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:46,048 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:27:46,048 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,048 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:46,048 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:46,048 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2021-10-28 23:27:46,049 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:46,049 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:46,050 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 23:27:46,055 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 23:27:46,071 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 23:27:46,143 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:46,143 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:27:46,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:46,145 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:46,148 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 23:27:46,158 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:46,158 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:46,158 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:46,158 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:46,163 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:27:46,163 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:27:46,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-28 23:27:46,167 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:27:46,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-10-28 23:27:46,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:46,189 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:46,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-28 23:27:46,191 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 23:27:46,200 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:46,200 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:27:46,200 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:46,200 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:46,200 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:46,203 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:27:46,203 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:27:46,213 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:27:46,222 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:27:46,223 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:27:46,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:46,231 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:46,236 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:27:46,236 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:27:46,236 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:27:46,236 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-10-28 23:27:46,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-28 23:27:46,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:46,268 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:27:46,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:46,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:46,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:27:46,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:27:46,363 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2021-10-28 23:27:46,363 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8 Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 23:27:46,426 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 39 transitions. Complement of second has 7 states. [2021-10-28 23:27:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 23:27:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-10-28 23:27:46,428 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 5 letters. [2021-10-28 23:27:46,428 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:46,428 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:27:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:46,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:46,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:46,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:46,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:27:46,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:46,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:27:46,552 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 4 loop predicates [2021-10-28 23:27:46,552 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8 Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 23:27:46,589 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 33 states and 44 transitions. Complement of second has 8 states. [2021-10-28 23:27:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 23:27:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-10-28 23:27:46,590 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 5 letters. Loop has 5 letters. [2021-10-28 23:27:46,590 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:46,590 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 10 letters. Loop has 5 letters. [2021-10-28 23:27:46,590 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:46,590 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 5 letters. Loop has 10 letters. [2021-10-28 23:27:46,591 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:46,591 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 44 transitions. [2021-10-28 23:27:46,592 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-28 23:27:46,592 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 26 states and 35 transitions. [2021-10-28 23:27:46,593 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-10-28 23:27:46,593 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-10-28 23:27:46,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2021-10-28 23:27:46,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:27:46,593 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-10-28 23:27:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2021-10-28 23:27:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-10-28 23:27:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 23:27:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-10-28 23:27:46,596 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-28 23:27:46,596 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-28 23:27:46,597 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 23:27:46,597 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 34 transitions. [2021-10-28 23:27:46,598 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-28 23:27:46,598 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:27:46,598 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:27:46,598 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2021-10-28 23:27:46,599 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-28 23:27:46,599 INFO L791 eck$LassoCheckResult]: Stem: 695#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 696#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 698#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 713#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 701#L23 assume !(main_~q~0 < main_~p~0); 702#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 712#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 710#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 709#L26-2 [2021-10-28 23:27:46,599 INFO L793 eck$LassoCheckResult]: Loop: 709#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 708#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 709#L26-2 [2021-10-28 23:27:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash 602336749, now seen corresponding path program 6 times [2021-10-28 23:27:46,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:46,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887416597] [2021-10-28 23:27:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:46,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:46,607 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:46,614 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:46,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 3 times [2021-10-28 23:27:46,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:46,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351417931] [2021-10-28 23:27:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:46,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:46,619 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:46,622 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:46,623 INFO L85 PathProgramCache]: Analyzing trace with hash -974968848, now seen corresponding path program 7 times [2021-10-28 23:27:46,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:27:46,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439367816] [2021-10-28 23:27:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:27:46,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:27:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:46,632 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:27:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:27:46,640 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:27:46,671 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:46,671 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:46,671 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:46,671 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:46,672 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:27:46,672 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,672 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:46,672 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:46,672 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2021-10-28 23:27:46,672 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:46,672 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:46,676 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 23:27:46,678 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 23:27:46,681 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 23:27:46,727 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:46,727 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:27:46,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:46,729 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:46,736 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:46,736 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:46,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-28 23:27:46,772 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:27:46,772 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_11=1} Honda state: {v_rep~unnamed0~0~true_11=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:27:46,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:46,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:46,814 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:46,821 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:46,821 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:46,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-28 23:27:46,847 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:27:46,848 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_11=0} Honda state: {v_rep~unnamed0~0~false_11=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:27:46,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:46,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:46,889 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:46,891 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:27:46,891 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:46,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-28 23:27:46,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-10-28 23:27:46,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:46,947 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:46,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-28 23:27:46,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:27:46,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:27:46,990 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:27:46,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-10-28 23:27:46,993 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:27:46,993 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:27:46,993 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:27:46,993 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:27:46,993 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:27:46,993 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:46,993 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:27:46,993 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:27:46,993 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2021-10-28 23:27:46,993 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:27:46,993 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:27:46,994 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 23:27:47,008 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 23:27:47,012 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 23:27:47,058 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:27:47,058 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:27:47,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:47,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:47,060 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:47,064 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 23:27:47,074 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:27:47,074 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:27:47,075 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:27:47,075 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:27:47,075 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:27:47,076 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:27:47,077 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:27:47,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-28 23:27:47,087 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:27:47,100 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 23:27:47,100 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 23:27:47,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:27:47,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:27:47,101 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:27:47,104 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:27:47,104 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:27:47,104 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:27:47,104 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-10-28 23:27:47,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-28 23:27:47,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:47,146 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:27:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:27:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:47,235 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 23:27:47,235 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 23:27:47,236 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:27:47,254 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 33 states and 43 transitions. Complement of second has 5 states. [2021-10-28 23:27:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:27:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-10-28 23:27:47,256 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-10-28 23:27:47,256 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:47,256 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:27:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:47,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:47,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:27:47,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:47,328 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 23:27:47,328 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-28 23:27:47,329 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:27:47,349 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 33 states and 43 transitions. Complement of second has 5 states. [2021-10-28 23:27:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:27:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-10-28 23:27:47,351 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-10-28 23:27:47,351 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:47,351 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:27:47,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:27:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:47,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:27:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:27:47,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:27:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:27:47,429 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 23:27:47,431 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-28 23:27:47,431 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:27:47,449 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 35 states and 46 transitions. Complement of second has 4 states. [2021-10-28 23:27:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-28 23:27:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 23:27:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-10-28 23:27:47,450 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 2 letters. [2021-10-28 23:27:47,451 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:47,451 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 10 letters. Loop has 2 letters. [2021-10-28 23:27:47,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:47,453 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 4 letters. [2021-10-28 23:27:47,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:27:47,453 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 46 transitions. [2021-10-28 23:27:47,456 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 23:27:47,456 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2021-10-28 23:27:47,456 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-28 23:27:47,456 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-28 23:27:47,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-28 23:27:47,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:27:47,457 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:27:47,457 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:27:47,457 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:27:47,457 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 23:27:47,457 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:27:47,457 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 23:27:47,458 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-28 23:27:47,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 11:27:47 BoogieIcfgContainer [2021-10-28 23:27:47,464 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 23:27:47,465 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:27:47,465 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:27:47,465 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:27:47,465 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:27:40" (3/4) ... [2021-10-28 23:27:47,469 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 23:27:47,469 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:27:47,471 INFO L168 Benchmark]: Toolchain (without parser) took 7970.64 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 61.9 MB in the beginning and 58.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 35.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:27:47,471 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory was 65.8 MB in the beginning and 65.8 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:27:47,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.63 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 61.6 MB in the beginning and 105.9 MB in the end (delta: -44.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:27:47,473 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.12 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 104.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:27:47,477 INFO L168 Benchmark]: Boogie Preprocessor took 22.30 ms. Allocated memory is still 130.0 MB. Free memory was 104.6 MB in the beginning and 103.8 MB in the end (delta: 787.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:27:47,478 INFO L168 Benchmark]: RCFGBuilder took 308.92 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 95.2 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:27:47,478 INFO L168 Benchmark]: BuchiAutomizer took 7287.85 ms. Allocated memory is still 130.0 MB. Free memory was 95.2 MB in the beginning and 58.9 MB in the end (delta: 36.4 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:27:47,478 INFO L168 Benchmark]: Witness Printer took 4.43 ms. Allocated memory is still 130.0 MB. Free memory is still 58.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:27:47,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory was 65.8 MB in the beginning and 65.8 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.63 ms. Allocated memory was 96.5 MB in the beginning and 130.0 MB in the end (delta: 33.6 MB). Free memory was 61.6 MB in the beginning and 105.9 MB in the end (delta: -44.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.12 ms. Allocated memory is still 130.0 MB. Free memory was 105.9 MB in the beginning and 104.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.30 ms. Allocated memory is still 130.0 MB. Free memory was 104.6 MB in the beginning and 103.8 MB in the end (delta: 787.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 308.92 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 95.2 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 7287.85 ms. Allocated memory is still 130.0 MB. Free memory was 95.2 MB in the beginning and 58.9 MB in the end (delta: 36.4 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.43 ms. Allocated memory is still 130.0 MB. Free memory is still 58.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (1 trivial, 4 deterministic, 2 nondeterministic). One deterministic module has affine ranking function q and consists of 5 locations. One deterministic module has affine ranking function p and consists of 4 locations. One deterministic module has affine ranking function q and consists of 3 locations. One deterministic module has affine ranking function p and consists of 5 locations. One nondeterministic module has affine ranking function p and consists of 4 locations. One nondeterministic module has affine ranking function q and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 7.2s and 8 iterations. TraceHistogramMax:3. Analysis of lassos took 5.4s. Construction of modules took 0.1s. Büchi inclusion checks took 1.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 15 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 6. Nontrivial modules had stage [3, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 56 SDtfs, 69 SDslu, 9 SDs, 0 SdLazy, 123 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT6 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax162 hnf100 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq159 hnf93 smp90 dnf100 smp100 tf107 neg98 sie118 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 47ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-28 23:27:47,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-28 23:27:47,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91ebda65-8d6e-48da-8389-04be894e87ca/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...