./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2c28e4a28eb31322d66c263b5716511ec5353f2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis No suitable file found in config dir /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config using search string *Termination*32bit*_Bitvector*.epf No suitable settings file found using Termination*32bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: ClassCastException: class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator cannot be cast to class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData (de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator and de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @560348e6) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-31 04:16:55,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-31 04:16:55,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-31 04:16:55,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-31 04:16:55,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-31 04:16:55,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-31 04:16:55,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-31 04:16:55,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-31 04:16:55,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-31 04:16:55,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-31 04:16:55,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-31 04:16:55,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-31 04:16:55,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-31 04:16:55,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-31 04:16:55,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-31 04:16:55,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-31 04:16:55,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-31 04:16:55,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-31 04:16:55,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-31 04:16:55,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-31 04:16:55,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-31 04:16:55,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-31 04:16:55,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-31 04:16:55,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-31 04:16:55,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-31 04:16:55,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-31 04:16:55,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-31 04:16:55,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-31 04:16:55,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-31 04:16:55,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-31 04:16:55,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-31 04:16:55,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-31 04:16:55,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-31 04:16:55,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-31 04:16:55,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-31 04:16:55,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-31 04:16:55,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-31 04:16:55,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-31 04:16:55,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-31 04:16:55,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-31 04:16:55,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-31 04:16:55,741 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-31 04:16:55,757 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-31 04:16:55,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-31 04:16:55,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-31 04:16:55,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-31 04:16:55,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-31 04:16:55,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-31 04:16:55,759 INFO L138 SettingsManager]: * Use SBE=true [2021-08-31 04:16:55,759 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-31 04:16:55,759 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-31 04:16:55,760 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-31 04:16:55,760 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-31 04:16:55,760 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-31 04:16:55,760 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-31 04:16:55,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-31 04:16:55,761 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-31 04:16:55,761 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-31 04:16:55,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-31 04:16:55,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-31 04:16:55,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-31 04:16:55,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-31 04:16:55,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-31 04:16:55,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-31 04:16:55,762 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-31 04:16:55,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-31 04:16:55,762 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-31 04:16:55,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-31 04:16:55,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-31 04:16:55,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-31 04:16:55,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-31 04:16:55,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-31 04:16:55,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-31 04:16:55,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-31 04:16:55,764 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-31 04:16:55,764 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2c28e4a28eb31322d66c263b5716511ec5353f2 [2021-08-31 04:16:56,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-31 04:16:56,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-31 04:16:56,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-31 04:16:56,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-31 04:16:56,108 INFO L275 PluginConnector]: CDTParser initialized [2021-08-31 04:16:56,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2021-08-31 04:16:56,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cc16ca65/257f1c34d08a4ac99da5db53962df4d7/FLAG36de87f10 [2021-08-31 04:16:56,513 INFO L306 CDTParser]: Found 1 translation units. [2021-08-31 04:16:56,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2021-08-31 04:16:56,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cc16ca65/257f1c34d08a4ac99da5db53962df4d7/FLAG36de87f10 [2021-08-31 04:16:56,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cc16ca65/257f1c34d08a4ac99da5db53962df4d7 [2021-08-31 04:16:56,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-31 04:16:56,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-31 04:16:56,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-31 04:16:56,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-31 04:16:56,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-31 04:16:56,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:16:56" (1/1) ... [2021-08-31 04:16:56,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b1b33a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:56, skipping insertion in model container [2021-08-31 04:16:56,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:16:56" (1/1) ... [2021-08-31 04:16:56,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-31 04:16:56,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-31 04:16:57,054 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2021-08-31 04:16:57,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-31 04:16:57,059 INFO L203 MainTranslator]: Completed pre-run [2021-08-31 04:16:57,067 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2021-08-31 04:16:57,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-31 04:16:57,074 INFO L208 MainTranslator]: Completed translation [2021-08-31 04:16:57,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57 WrapperNode [2021-08-31 04:16:57,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-31 04:16:57,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-31 04:16:57,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-31 04:16:57,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-31 04:16:57,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-31 04:16:57,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-31 04:16:57,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-31 04:16:57,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-31 04:16:57,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-31 04:16:57,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-31 04:16:57,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-31 04:16:57,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-31 04:16:57,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (1/1) ... [2021-08-31 04:16:57,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:57,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:57,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:57,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-31 04:16:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-31 04:16:57,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-31 04:16:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-31 04:16:57,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-31 04:16:57,192 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-08-31 04:16:57,192 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-08-31 04:16:57,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-31 04:16:57,274 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-31 04:16:57,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:16:57 BoogieIcfgContainer [2021-08-31 04:16:57,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-31 04:16:57,276 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-31 04:16:57,276 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-31 04:16:57,278 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-31 04:16:57,279 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-31 04:16:57,279 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 31.08 04:16:56" (1/3) ... [2021-08-31 04:16:57,279 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4b45c36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 31.08 04:16:57, skipping insertion in model container [2021-08-31 04:16:57,279 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-31 04:16:57,280 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:16:57" (2/3) ... [2021-08-31 04:16:57,280 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4b45c36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 31.08 04:16:57, skipping insertion in model container [2021-08-31 04:16:57,280 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-31 04:16:57,280 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:16:57" (3/3) ... [2021-08-31 04:16:57,281 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_7-2.c [2021-08-31 04:16:57,306 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-31 04:16:57,306 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-31 04:16:57,306 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-31 04:16:57,307 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-31 04:16:57,307 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-31 04:16:57,307 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-31 04:16:57,307 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-31 04:16:57,307 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-31 04:16:57,315 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-31 04:16:57,327 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-31 04:16:57,327 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 04:16:57,328 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 04:16:57,332 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-31 04:16:57,332 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-31 04:16:57,332 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-31 04:16:57,332 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-31 04:16:57,334 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-31 04:16:57,334 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 04:16:57,334 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 04:16:57,334 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-31 04:16:57,334 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-31 04:16:57,340 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 6#L27true call main_#t~ret9 := fibo(main_~x~0);< 7#fiboENTRYtrue [2021-08-31 04:16:57,340 INFO L793 eck$LassoCheckResult]: Loop: 7#fiboENTRYtrue ~n := #in~n; 8#L8true assume !(~n < 1); 10#L10true assume !(1 == ~n); 15#L13true call #t~ret7 := fibo(~n - 1);< 7#fiboENTRYtrue [2021-08-31 04:16:57,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:16:57,343 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-08-31 04:16:57,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:16:57,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295356672] [2021-08-31 04:16:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:16:57,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:16:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:16:57,413 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 04:16:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:16:57,434 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 04:16:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:16:57,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-08-31 04:16:57,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:16:57,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557763154] [2021-08-31 04:16:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:16:57,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:16:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:16:57,441 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 04:16:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:16:57,444 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 04:16:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:16:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-08-31 04:16:57,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:16:57,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814487358] [2021-08-31 04:16:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:16:57,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:16:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:16:57,456 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 04:16:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:16:57,467 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 04:16:57,576 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 04:16:57,577 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 04:16:57,577 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 04:16:57,577 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 04:16:57,577 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 04:16:57,577 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:57,577 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 04:16:57,577 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 04:16:57,578 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2021-08-31 04:16:57,578 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 04:16:57,578 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 04:16:57,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:57,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:57,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:57,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:57,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:57,645 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 04:16:57,646 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 04:16:57,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:57,649 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:57,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-31 04:16:57,653 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:16:57,653 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:57,687 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 04:16:57,687 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 04:16:57,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:57,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:57,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:57,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:57,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-31 04:16:57,709 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:16:57,709 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:57,730 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 04:16:57,731 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 04:16:57,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:57,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:57,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:57,750 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:57,767 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:16:57,767 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:57,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-31 04:16:57,785 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 04:16:57,786 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 04:16:57,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:57,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:57,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:57,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:57,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-31 04:16:57,809 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:16:57,809 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:57,830 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 04:16:57,830 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 04:16:57,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:57,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:57,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:57,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:57,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-31 04:16:57,853 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:16:57,854 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:57,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:57,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:57,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:57,895 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:57,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-31 04:16:57,897 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 04:16:57,897 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:57,961 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 04:16:57,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:57,967 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 04:16:57,967 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 04:16:57,968 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 04:16:57,968 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 04:16:57,968 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 04:16:57,968 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:57,968 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 04:16:57,968 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 04:16:57,968 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2021-08-31 04:16:57,968 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 04:16:57,968 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 04:16:57,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:57,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:57,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:57,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:57,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:58,027 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 04:16:58,031 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 04:16:58,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:58,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:58,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:58,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-31 04:16:58,035 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 [2021-08-31 04:16:58,042 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:16:58,042 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:16:58,043 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:16:58,043 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:16:58,043 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:16:58,044 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:16:58,044 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:16:58,060 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 04:16:58,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:58,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:58,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:58,078 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:58,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-31 04:16:58,081 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 [2021-08-31 04:16:58,087 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:16:58,087 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:16:58,088 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:16:58,088 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:16:58,088 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:16:58,089 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:16:58,089 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:16:58,105 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 04:16:58,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:58,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:58,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:58,124 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:58,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-31 04:16:58,126 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 [2021-08-31 04:16:58,133 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:16:58,133 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:16:58,133 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:16:58,134 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:16:58,134 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:16:58,134 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:16:58,134 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:16:58,149 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 04:16:58,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:58,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:58,167 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:58,185 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 [2021-08-31 04:16:58,192 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:16:58,192 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:16:58,192 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:16:58,192 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:16:58,192 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:16:58,194 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:16:58,194 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:16:58,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-31 04:16:58,205 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 04:16:58,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:58,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:58,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:58,225 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:58,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-31 04:16:58,227 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 [2021-08-31 04:16:58,235 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:16:58,236 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:16:58,236 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:16:58,236 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:16:58,236 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:16:58,239 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:16:58,239 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:16:58,252 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 04:16:58,258 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-31 04:16:58,258 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-31 04:16:58,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:58,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:58,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:58,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-31 04:16:58,319 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 04:16:58,320 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 04:16:58,320 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 04:16:58,320 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-08-31 04:16:58,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:58,338 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 04:16:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:16:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:16:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-31 04:16:58,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:16:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:16:58,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-31 04:16:58,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:16:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 04:16:58,446 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 [2021-08-31 04:16:58,448 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 04:16:58,524 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 48 states and 60 transitions. Complement of second has 12 states. [2021-08-31 04:16:58,526 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 [2021-08-31 04:16:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-31 04:16:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-08-31 04:16:58,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-08-31 04:16:58,537 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:16:58,537 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-08-31 04:16:58,538 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:16:58,538 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-08-31 04:16:58,538 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:16:58,539 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-08-31 04:16:58,546 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-31 04:16:58,557 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-08-31 04:16:58,559 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-08-31 04:16:58,560 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-08-31 04:16:58,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-08-31 04:16:58,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 04:16:58,561 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-08-31 04:16:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-08-31 04:16:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-08-31 04:16:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-31 04:16:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-08-31 04:16:58,583 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-08-31 04:16:58,583 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-08-31 04:16:58,583 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-31 04:16:58,583 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-08-31 04:16:58,584 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-31 04:16:58,584 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 04:16:58,584 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 04:16:58,585 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-31 04:16:58,586 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-08-31 04:16:58,586 INFO L791 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 123#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 134#L8 assume ~n < 1;#res := 0; 135#fiboFINAL assume true; 136#fiboEXIT >#33#return; 125#L13-1 [2021-08-31 04:16:58,586 INFO L793 eck$LassoCheckResult]: Loop: 125#L13-1 call #t~ret8 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 141#L8 assume !(~n < 1); 140#L10 assume !(1 == ~n); 124#L13 call #t~ret7 := fibo(~n - 1);< 126#fiboENTRY ~n := #in~n; 141#L8 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 139#fiboEXIT >#33#return; 125#L13-1 [2021-08-31 04:16:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:16:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-08-31 04:16:58,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:16:58,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840705026] [2021-08-31 04:16:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:16:58,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:16:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:16:58,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-31 04:16:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:16:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-31 04:16:58,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 04:16:58,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840705026] [2021-08-31 04:16:58,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840705026] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-31 04:16:58,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-31 04:16:58,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-31 04:16:58,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486098622] [2021-08-31 04:16:58,654 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-31 04:16:58,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:16:58,654 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-08-31 04:16:58,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:16:58,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145495662] [2021-08-31 04:16:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:16:58,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:16:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:16:58,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-31 04:16:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:16:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-31 04:16:58,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 04:16:58,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145495662] [2021-08-31 04:16:58,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145495662] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-31 04:16:58,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-31 04:16:58,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-31 04:16:58,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226056951] [2021-08-31 04:16:58,682 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-31 04:16:58,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 04:16:58,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-31 04:16:58,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-31 04:16:58,685 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-31 04:16:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 04:16:58,736 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-08-31 04:16:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-31 04:16:58,737 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-08-31 04:16:58,738 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-31 04:16:58,739 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-08-31 04:16:58,739 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-08-31 04:16:58,739 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-08-31 04:16:58,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-08-31 04:16:58,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 04:16:58,740 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-08-31 04:16:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-08-31 04:16:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-31 04:16:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-31 04:16:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-08-31 04:16:58,771 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-08-31 04:16:58,771 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-08-31 04:16:58,771 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-31 04:16:58,771 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-08-31 04:16:58,772 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-31 04:16:58,772 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 04:16:58,772 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 04:16:58,772 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-31 04:16:58,772 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-08-31 04:16:58,773 INFO L791 eck$LassoCheckResult]: Stem: 195#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 196#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret7 := fibo(~n - 1);< 202#fiboENTRY ~n := #in~n; 208#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 212#fiboFINAL assume true; 214#fiboEXIT >#33#return; 198#L13-1 [2021-08-31 04:16:58,773 INFO L793 eck$LassoCheckResult]: Loop: 198#L13-1 call #t~ret8 := fibo(~n - 2);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume !(1 == ~n); 197#L13 call #t~ret7 := fibo(~n - 1);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume 1 == ~n;#res := 1; 216#fiboFINAL assume true; 213#fiboEXIT >#33#return; 198#L13-1 [2021-08-31 04:16:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:16:58,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-08-31 04:16:58,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:16:58,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640830486] [2021-08-31 04:16:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:16:58,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:16:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:16:58,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-08-31 04:16:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-31 04:16:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:16:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 04:16:58,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 04:16:58,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640830486] [2021-08-31 04:16:58,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640830486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-31 04:16:58,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046426852] [2021-08-31 04:16:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:16:58,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-31 04:16:58,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:58,833 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-31 04:16:58,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-31 04:16:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:16:58,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-31 04:16:58,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:16:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 04:16:58,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-31 04:16:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 04:16:59,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046426852] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-31 04:16:59,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-31 04:16:59,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-08-31 04:16:59,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020957347] [2021-08-31 04:16:59,021 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-31 04:16:59,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:16:59,022 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-08-31 04:16:59,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:16:59,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287600473] [2021-08-31 04:16:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:16:59,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:16:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:16:59,025 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 04:16:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:16:59,029 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 04:16:59,144 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 04:16:59,144 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 04:16:59,144 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 04:16:59,144 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 04:16:59,144 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 04:16:59,144 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:59,144 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 04:16:59,145 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 04:16:59,145 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2021-08-31 04:16:59,145 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 04:16:59,145 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 04:16:59,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:59,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:59,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:59,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:16:59,198 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 04:16:59,198 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 04:16:59,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:59,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:59,200 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:59,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-31 04:16:59,204 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:16:59,204 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:59,225 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 04:16:59,225 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 04:16:59,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:59,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:59,243 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:59,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-31 04:16:59,245 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:16:59,245 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:59,279 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 04:16:59,279 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 04:16:59,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:59,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:59,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:59,296 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:59,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-31 04:16:59,299 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:16:59,299 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:59,306 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 04:16:59,307 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 04:16:59,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:59,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:59,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:59,325 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:59,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-31 04:16:59,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:16:59,327 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:16:59,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-08-31 04:16:59,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:16:59,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:16:59,365 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:16:59,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-31 04:16:59,367 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 04:16:59,367 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:17:00,190 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 04:17:00,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:00,195 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 04:17:00,195 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 04:17:00,195 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 04:17:00,195 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 04:17:00,195 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 04:17:00,195 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:00,195 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 04:17:00,195 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 04:17:00,195 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2021-08-31 04:17:00,195 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 04:17:00,195 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 04:17:00,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:00,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:00,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:00,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:00,238 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 04:17:00,238 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 04:17:00,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:00,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:00,239 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:00,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-08-31 04:17:00,246 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 [2021-08-31 04:17:00,252 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:17:00,253 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:17:00,253 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:17:00,253 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:17:00,253 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:17:00,253 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:17:00,254 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:17:00,257 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 04:17:00,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:00,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:00,274 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:00,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-08-31 04:17:00,276 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 [2021-08-31 04:17:00,283 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:17:00,283 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:17:00,283 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:17:00,283 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:17:00,283 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:17:00,284 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:17:00,284 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:17:00,297 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 04:17:00,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:00,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:00,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:00,315 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:00,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-08-31 04:17:00,329 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 [2021-08-31 04:17:00,337 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:17:00,337 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:17:00,337 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:17:00,337 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:17:00,337 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:17:00,338 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:17:00,338 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:17:00,340 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-31 04:17:00,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:00,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:00,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:00,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:00,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-08-31 04:17:00,361 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 [2021-08-31 04:17:00,369 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:17:00,369 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:17:00,369 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:17:00,369 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:17:00,369 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:17:00,374 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:17:00,374 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:17:00,389 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 04:17:00,400 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-31 04:17:00,400 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-31 04:17:00,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:00,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:00,401 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:00,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-08-31 04:17:00,406 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 04:17:00,406 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 04:17:00,406 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 04:17:00,406 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-08-31 04:17:00,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:00,433 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 04:17:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:17:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:00,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-31 04:17:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:00,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-31 04:17:00,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-31 04:17:00,609 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-08-31 04:17:00,609 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-31 04:17:00,748 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2021-08-31 04:17:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-08-31 04:17:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-31 04:17:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-08-31 04:17:00,750 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-08-31 04:17:00,751 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:17:00,751 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-08-31 04:17:00,751 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:17:00,751 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-08-31 04:17:00,752 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:17:00,752 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-08-31 04:17:00,755 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-08-31 04:17:00,758 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-08-31 04:17:00,758 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-08-31 04:17:00,758 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-08-31 04:17:00,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-08-31 04:17:00,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 04:17:00,759 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-08-31 04:17:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-08-31 04:17:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-08-31 04:17:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2021-08-31 04:17:00,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-08-31 04:17:00,766 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-08-31 04:17:00,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 04:17:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-31 04:17:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-31 04:17:00,767 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-31 04:17:00,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:00,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 04:17:00,904 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2021-08-31 04:17:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-31 04:17:00,905 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2021-08-31 04:17:00,907 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-08-31 04:17:00,909 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2021-08-31 04:17:00,909 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-08-31 04:17:00,909 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-08-31 04:17:00,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2021-08-31 04:17:00,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 04:17:00,910 INFO L681 BuchiCegarLoop]: Abstraction has 118 states and 160 transitions. [2021-08-31 04:17:00,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2021-08-31 04:17:00,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-08-31 04:17:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2021-08-31 04:17:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2021-08-31 04:17:00,918 INFO L704 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-08-31 04:17:00,918 INFO L587 BuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2021-08-31 04:17:00,918 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-31 04:17:00,918 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2021-08-31 04:17:00,919 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-08-31 04:17:00,919 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 04:17:00,919 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 04:17:00,921 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-31 04:17:00,921 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-08-31 04:17:00,921 INFO L791 eck$LassoCheckResult]: Stem: 789#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 790#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 804#L27 call main_#t~ret9 := fibo(main_~x~0);< 806#fiboENTRY ~n := #in~n; 854#L8 assume !(~n < 1); 853#L10 assume !(1 == ~n); 803#L13 call #t~ret7 := fibo(~n - 1);< 805#fiboENTRY ~n := #in~n; 815#L8 assume !(~n < 1); 820#L10 assume !(1 == ~n); 826#L13 call #t~ret7 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret7 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret7 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 852#L8 assume !(~n < 1); 850#L10 assume 1 == ~n;#res := 1; 848#fiboFINAL assume true; 846#fiboEXIT >#33#return; 792#L13-1 call #t~ret8 := fibo(~n - 2);< 844#fiboENTRY ~n := #in~n; 892#L8 assume ~n < 1;#res := 0; 891#fiboFINAL assume true; 890#fiboEXIT >#35#return; 889#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 887#fiboFINAL assume true; 879#fiboEXIT >#33#return; 824#L13-1 [2021-08-31 04:17:00,921 INFO L793 eck$LassoCheckResult]: Loop: 824#L13-1 call #t~ret8 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret7 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret7 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret8 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret7 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret8 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume ~n < 1;#res := 0; 885#fiboFINAL assume true; 883#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 886#fiboFINAL assume true; 880#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 886#fiboFINAL assume true; 880#fiboEXIT >#33#return; 824#L13-1 [2021-08-31 04:17:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:17:00,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 1 times [2021-08-31 04:17:00,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:17:00,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887931016] [2021-08-31 04:17:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:17:00,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:17:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:00,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-31 04:17:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-31 04:17:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-31 04:17:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-31 04:17:01,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 04:17:01,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887931016] [2021-08-31 04:17:01,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887931016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-31 04:17:01,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902079168] [2021-08-31 04:17:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:17:01,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-31 04:17:01,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:01,016 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-31 04:17:01,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-31 04:17:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-31 04:17:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-31 04:17:01,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-31 04:17:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-31 04:17:01,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902079168] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-31 04:17:01,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-31 04:17:01,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 18 [2021-08-31 04:17:01,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783371186] [2021-08-31 04:17:01,274 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-31 04:17:01,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:17:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-08-31 04:17:01,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:17:01,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393011945] [2021-08-31 04:17:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:17:01,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:17:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-31 04:17:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-31 04:17:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-31 04:17:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-31 04:17:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-31 04:17:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-31 04:17:01,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 04:17:01,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393011945] [2021-08-31 04:17:01,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393011945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-31 04:17:01,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446255177] [2021-08-31 04:17:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:17:01,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-31 04:17:01,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:01,385 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-31 04:17:01,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-31 04:17:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-31 04:17:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-31 04:17:01,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-31 04:17:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-31 04:17:01,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446255177] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-31 04:17:01,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-31 04:17:01,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-08-31 04:17:01,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214297459] [2021-08-31 04:17:01,599 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-31 04:17:01,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 04:17:01,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-31 04:17:01,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-31 04:17:01,600 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 11 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-31 04:17:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 04:17:01,858 INFO L93 Difference]: Finished difference Result 146 states and 193 transitions. [2021-08-31 04:17:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-31 04:17:01,859 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 146 states and 193 transitions. [2021-08-31 04:17:01,861 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-08-31 04:17:01,862 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 146 states to 139 states and 186 transitions. [2021-08-31 04:17:01,862 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 94 [2021-08-31 04:17:01,863 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 94 [2021-08-31 04:17:01,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 186 transitions. [2021-08-31 04:17:01,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 04:17:01,863 INFO L681 BuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-08-31 04:17:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 186 transitions. [2021-08-31 04:17:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-08-31 04:17:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 92 states have internal predecessors, (101), 33 states have call successors, (34), 17 states have call predecessors, (34), 20 states have return successors, (51), 29 states have call predecessors, (51), 30 states have call successors, (51) [2021-08-31 04:17:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 186 transitions. [2021-08-31 04:17:01,870 INFO L704 BuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-08-31 04:17:01,870 INFO L587 BuchiCegarLoop]: Abstraction has 139 states and 186 transitions. [2021-08-31 04:17:01,870 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-31 04:17:01,870 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 139 states and 186 transitions. [2021-08-31 04:17:01,872 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-08-31 04:17:01,872 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-31 04:17:01,872 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-31 04:17:01,873 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-31 04:17:01,873 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-31 04:17:01,873 INFO L791 eck$LassoCheckResult]: Stem: 1564#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1565#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 1579#L27 call main_#t~ret9 := fibo(main_~x~0);< 1580#fiboENTRY ~n := #in~n; 1640#L8 assume !(~n < 1); 1600#L10 assume !(1 == ~n); 1577#L13 call #t~ret7 := fibo(~n - 1);< 1589#fiboENTRY ~n := #in~n; 1590#L8 assume !(~n < 1); 1597#L10 assume !(1 == ~n); 1576#L13 call #t~ret7 := fibo(~n - 1);< 1578#fiboENTRY ~n := #in~n; 1639#L8 assume !(~n < 1); 1638#L10 assume !(1 == ~n); 1634#L13 call #t~ret7 := fibo(~n - 1);< 1637#fiboENTRY ~n := #in~n; 1636#L8 assume !(~n < 1); 1635#L10 assume !(1 == ~n); 1621#L13 call #t~ret7 := fibo(~n - 1);< 1627#fiboENTRY ~n := #in~n; 1633#L8 assume !(~n < 1); 1632#L10 assume !(1 == ~n); 1622#L13 call #t~ret7 := fibo(~n - 1);< 1627#fiboENTRY ~n := #in~n; 1633#L8 assume !(~n < 1); 1632#L10 assume !(1 == ~n); 1622#L13 call #t~ret7 := fibo(~n - 1);< 1627#fiboENTRY ~n := #in~n; 1631#L8 assume !(~n < 1); 1630#L10 assume 1 == ~n;#res := 1; 1628#fiboFINAL assume true; 1626#fiboEXIT >#33#return; 1567#L13-1 call #t~ret8 := fibo(~n - 2);< 1623#fiboENTRY ~n := #in~n; 1642#L8 assume ~n < 1;#res := 0; 1688#fiboFINAL assume true; 1686#fiboEXIT >#35#return; 1682#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1680#fiboFINAL assume true; 1663#fiboEXIT >#33#return; 1583#L13-1 [2021-08-31 04:17:01,873 INFO L793 eck$LassoCheckResult]: Loop: 1583#L13-1 call #t~ret8 := fibo(~n - 2);< 1575#fiboENTRY ~n := #in~n; 1588#L8 assume !(~n < 1); 1598#L10 assume !(1 == ~n); 1587#L13 call #t~ret7 := fibo(~n - 1);< 1575#fiboENTRY ~n := #in~n; 1588#L8 assume !(~n < 1); 1598#L10 assume !(1 == ~n); 1587#L13 call #t~ret7 := fibo(~n - 1);< 1575#fiboENTRY ~n := #in~n; 1588#L8 assume !(~n < 1); 1598#L10 assume 1 == ~n;#res := 1; 1599#fiboFINAL assume true; 1693#fiboEXIT >#33#return; 1668#L13-1 call #t~ret8 := fibo(~n - 2);< 1678#fiboENTRY ~n := #in~n; 1702#L8 assume ~n < 1;#res := 0; 1641#fiboFINAL assume true; 1694#fiboEXIT >#35#return; 1591#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1699#fiboFINAL assume true; 1664#fiboEXIT >#33#return; 1583#L13-1 [2021-08-31 04:17:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:17:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1856310800, now seen corresponding path program 2 times [2021-08-31 04:17:01,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:17:01,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638568035] [2021-08-31 04:17:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:17:01,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:17:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:17:01,881 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 04:17:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:17:01,901 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 04:17:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:17:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 2 times [2021-08-31 04:17:01,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:17:01,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552186148] [2021-08-31 04:17:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:17:01,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:17:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:17:01,905 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-31 04:17:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-31 04:17:01,908 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-31 04:17:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:17:01,909 INFO L82 PathProgramCache]: Analyzing trace with hash -705851003, now seen corresponding path program 3 times [2021-08-31 04:17:01,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-31 04:17:01,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907167907] [2021-08-31 04:17:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-31 04:17:01,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-31 04:17:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:01,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-31 04:17:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:02,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-31 04:17:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:02,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-31 04:17:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:02,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-08-31 04:17:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:02,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-31 04:17:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:02,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-31 04:17:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 70 proven. 100 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-08-31 04:17:02,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-31 04:17:02,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907167907] [2021-08-31 04:17:02,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907167907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-31 04:17:02,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535693126] [2021-08-31 04:17:02,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-31 04:17:02,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-31 04:17:02,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:02,017 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-31 04:17:02,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-31 04:17:02,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-31 04:17:02,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-31 04:17:02,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-31 04:17:02,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-08-31 04:17:02,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-31 04:17:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 87 proven. 49 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-08-31 04:17:02,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535693126] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-31 04:17:02,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-31 04:17:02,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 12] total 27 [2021-08-31 04:17:02,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213440325] [2021-08-31 04:17:02,686 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 04:17:02,686 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 04:17:02,686 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 04:17:02,686 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 04:17:02,686 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-31 04:17:02,686 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:02,686 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 04:17:02,686 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 04:17:02,686 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2021-08-31 04:17:02,686 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 04:17:02,687 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 04:17:02,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:02,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:02,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:02,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:02,740 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 04:17:02,741 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-31 04:17:02,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:02,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:02,770 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:02,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-08-31 04:17:02,802 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:17:02,802 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:17:02,833 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-31 04:17:02,833 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-31 04:17:02,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:02,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:02,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:02,849 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:02,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-08-31 04:17:02,851 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-31 04:17:02,851 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:17:02,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-08-31 04:17:02,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:02,879 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:02,881 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-31 04:17:02,881 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-31 04:17:02,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-08-31 04:17:03,875 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-31 04:17:03,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:03,880 INFO L210 LassoAnalysis]: Preferences: [2021-08-31 04:17:03,880 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-31 04:17:03,880 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-31 04:17:03,880 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-31 04:17:03,880 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-31 04:17:03,880 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:03,880 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-31 04:17:03,880 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-31 04:17:03,880 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2021-08-31 04:17:03,880 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-31 04:17:03,880 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-31 04:17:03,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:03,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:03,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:03,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-31 04:17:03,934 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-31 04:17:03,934 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-31 04:17:03,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:03,949 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:03,951 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 [2021-08-31 04:17:03,957 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-31 04:17:03,957 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-31 04:17:03,957 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-31 04:17:03,957 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-31 04:17:03,957 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-31 04:17:03,966 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-31 04:17:03,966 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-31 04:17:03,980 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-31 04:17:03,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-08-31 04:17:03,982 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-31 04:17:03,983 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-31 04:17:03,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-31 04:17:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-31 04:17:03,992 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-31 04:17:04,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-08-31 04:17:04,021 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-31 04:17:04,021 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-31 04:17:04,021 INFO L513 LassoAnalysis]: Proved termination. [2021-08-31 04:17:04,021 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-08-31 04:17:04,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:04,047 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-31 04:17:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:17:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:04,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-31 04:17:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:04,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:04,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-31 04:17:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-31 04:17:04,481 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-08-31 04:17:04,481 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-31 04:17:04,651 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 272 states and 374 transitions. Complement of second has 45 states. [2021-08-31 04:17:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-08-31 04:17:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-31 04:17:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-08-31 04:17:04,655 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 40 letters. Loop has 22 letters. [2021-08-31 04:17:04,655 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:17:04,655 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-31 04:17:04,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:17:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-31 04:17:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:04,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-31 04:17:04,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-31 04:17:05,043 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2021-08-31 04:17:05,043 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-31 04:17:05,160 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 333 states and 447 transitions. Complement of second has 25 states. [2021-08-31 04:17:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-08-31 04:17:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-31 04:17:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-08-31 04:17:05,164 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 40 letters. Loop has 22 letters. [2021-08-31 04:17:05,164 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:17:05,164 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-31 04:17:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-31 04:17:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-31 04:17:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-31 04:17:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-31 04:17:05,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-31 04:17:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-31 04:17:05,566 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-08-31 04:17:05,566 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-31 04:17:05,751 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 139 states and 186 transitions. cyclomatic complexity: 53. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1179 states and 1649 transitions. Complement of second has 138 states. [2021-08-31 04:17:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-08-31 04:17:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-31 04:17:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-08-31 04:17:05,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 40 letters. Loop has 22 letters. [2021-08-31 04:17:05,754 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:17:05,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 62 letters. Loop has 22 letters. [2021-08-31 04:17:05,756 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:17:05,756 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 40 letters. Loop has 44 letters. [2021-08-31 04:17:05,757 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-31 04:17:05,757 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1179 states and 1649 transitions. [2021-08-31 04:17:05,787 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-08-31 04:17:05,798 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1179 states to 679 states and 1031 transitions. [2021-08-31 04:17:05,798 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 271 [2021-08-31 04:17:05,798 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 302 [2021-08-31 04:17:05,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 679 states and 1031 transitions. [2021-08-31 04:17:05,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-31 04:17:05,799 INFO L681 BuchiCegarLoop]: Abstraction has 679 states and 1031 transitions. [2021-08-31 04:17:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states and 1031 transitions. [2021-08-31 04:17:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 521. [2021-08-31 04:17:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 317 states have (on average 1.1892744479495267) internal successors, (377), 340 states have internal predecessors, (377), 121 states have call successors, (135), 62 states have call predecessors, (135), 83 states have return successors, (236), 118 states have call predecessors, (236), 115 states have call successors, (236) [2021-08-31 04:17:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 748 transitions. [2021-08-31 04:17:05,820 INFO L704 BuchiCegarLoop]: Abstraction has 521 states and 748 transitions. [2021-08-31 04:17:05,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-31 04:17:05,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-31 04:17:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-31 04:17:05,821 INFO L87 Difference]: Start difference. First operand 521 states and 748 transitions. Second operand has 27 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 15 states have call successors, (21), 8 states have call predecessors, (21), 6 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2021-08-31 04:17:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-31 04:17:06,363 INFO L93 Difference]: Finished difference Result 319 states and 372 transitions. [2021-08-31 04:17:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-31 04:17:06,364 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 319 states and 372 transitions. [2021-08-31 04:17:06,366 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-31 04:17:06,366 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 319 states to 0 states and 0 transitions. [2021-08-31 04:17:06,366 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-31 04:17:06,366 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-31 04:17:06,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-31 04:17:06,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-31 04:17:06,366 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 04:17:06,366 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 04:17:06,366 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-31 04:17:06,366 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-08-31 04:17:06,366 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-31 04:17:06,366 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-31 04:17:06,366 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-31 04:17:06,369 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer has thrown an exception: java.lang.ClassCastException: class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator cannot be cast to class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData (de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator and de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @560348e6) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoopBenchmark.prettyprintBenchmarkData(BuchiCegarLoopBenchmark.java:178) at de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData.toString(StatisticsData.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerTimingBenchmark.toString(BuchiAutomizerTimingBenchmark.java:44) at de.uni_freiburg.informatik.ultimate.core.lib.results.StatisticsResult.getLongDescription(StatisticsResult.java:58) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.reportResult(BuchiAutomizerObserver.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.doTerminationAnalysis(BuchiAutomizerObserver.java:161) at de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver.finish(BuchiAutomizerObserver.java:398) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-31 04:17:06,371 INFO L158 Benchmark]: Toolchain (without parser) took 9408.68ms. Allocated memory was 60.8MB in the beginning and 121.6MB in the end (delta: 60.8MB). Free memory was 40.0MB in the beginning and 46.3MB in the end (delta: -6.3MB). Peak memory consumption was 52.8MB. Max. memory is 16.1GB. [2021-08-31 04:17:06,372 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 60.8MB. Free memory was 43.4MB in the beginning and 43.4MB in the end (delta: 43.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-31 04:17:06,372 INFO L158 Benchmark]: CACSL2BoogieTranslator took 111.95ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 30.6MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-31 04:17:06,372 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.15ms. Allocated memory is still 60.8MB. Free memory was 30.6MB in the beginning and 29.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-31 04:17:06,372 INFO L158 Benchmark]: Boogie Preprocessor took 9.33ms. Allocated memory is still 60.8MB. Free memory was 29.3MB in the beginning and 28.4MB in the end (delta: 878.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-31 04:17:06,372 INFO L158 Benchmark]: RCFGBuilder took 174.06ms. Allocated memory is still 60.8MB. Free memory was 28.3MB in the beginning and 37.6MB in the end (delta: -9.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-31 04:17:06,373 INFO L158 Benchmark]: BuchiAutomizer took 9094.26ms. Allocated memory was 60.8MB in the beginning and 121.6MB in the end (delta: 60.8MB). Free memory was 37.4MB in the beginning and 46.3MB in the end (delta: -8.9MB). Peak memory consumption was 53.9MB. Max. memory is 16.1GB. [2021-08-31 04:17:06,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 60.8MB. Free memory was 43.4MB in the beginning and 43.4MB in the end (delta: 43.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 111.95ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 30.6MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.15ms. Allocated memory is still 60.8MB. Free memory was 30.6MB in the beginning and 29.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 9.33ms. Allocated memory is still 60.8MB. Free memory was 29.3MB in the beginning and 28.4MB in the end (delta: 878.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 174.06ms. Allocated memory is still 60.8MB. Free memory was 28.3MB in the beginning and 37.6MB in the end (delta: -9.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * BuchiAutomizer took 9094.26ms. Allocated memory was 60.8MB in the beginning and 121.6MB in the end (delta: 60.8MB). Free memory was 37.4MB in the beginning and 46.3MB in the end (delta: -8.9MB). Peak memory consumption was 53.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (4 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. 4 modules have a trivial ranking function, the largest among these consists of 27 locations. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - ExceptionOrErrorResult: ClassCastException: class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator cannot be cast to class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData (de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator and de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @560348e6) de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: ClassCastException: class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator cannot be cast to class de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData (de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsAggregator and de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @560348e6): de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiCegarLoopBenchmark.prettyprintBenchmarkData(BuchiCegarLoopBenchmark.java:178) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-31 04:17:06,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:06,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:06,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-31 04:17:07,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-31 04:17:07,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...