./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer --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 7e40a98558d0111ea95f3ee60a44cc14c7768182 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 13:23:54,188 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 13:23:54,189 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 13:23:54,197 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 13:23:54,197 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 13:23:54,198 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 13:23:54,198 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 13:23:54,200 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 13:23:54,201 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 13:23:54,201 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 13:23:54,202 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 13:23:54,202 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 13:23:54,203 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 13:23:54,204 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 13:23:54,205 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 13:23:54,205 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 13:23:54,206 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 13:23:54,207 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 13:23:54,208 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 13:23:54,210 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 13:23:54,210 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 13:23:54,211 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 13:23:54,213 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 13:23:54,213 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 13:23:54,213 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 13:23:54,214 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 13:23:54,215 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 13:23:54,215 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 13:23:54,216 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 13:23:54,217 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 13:23:54,217 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 13:23:54,217 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 13:23:54,218 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 13:23:54,218 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 13:23:54,218 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 13:23:54,219 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 13:23:54,219 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-23 13:23:54,231 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 13:23:54,231 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 13:23:54,232 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 13:23:54,232 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 13:23:54,232 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 13:23:54,232 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 13:23:54,232 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 13:23:54,232 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 13:23:54,233 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 13:23:54,233 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 13:23:54,233 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 13:23:54,233 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 13:23:54,233 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 13:23:54,233 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 13:23:54,233 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 13:23:54,233 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 13:23:54,233 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 13:23:54,233 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 13:23:54,234 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 13:23:54,234 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 13:23:54,234 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 13:23:54,235 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 13:23:54,235 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 13:23:54,235 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 13:23:54,236 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 13:23:54,236 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 13:23:54,236 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 13:23:54,236 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 13:23:54,236 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 13:23:54,236 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 13:23:54,236 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 13:23:54,237 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 13:23:54,237 INFO L133 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer 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 -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-11-23 13:23:54,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 13:23:54,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 13:23:54,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 13:23:54,275 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 13:23:54,275 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 13:23:54,276 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 13:23:54,318 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/data/770b55aaf/cca7f17f5a954732b86c24eeaa3dcc8b/FLAG91c1b1d00 [2018-11-23 13:23:54,655 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 13:23:54,655 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 13:23:54,659 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/data/770b55aaf/cca7f17f5a954732b86c24eeaa3dcc8b/FLAG91c1b1d00 [2018-11-23 13:23:55,078 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/data/770b55aaf/cca7f17f5a954732b86c24eeaa3dcc8b [2018-11-23 13:23:55,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 13:23:55,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 13:23:55,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 13:23:55,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 13:23:55,085 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 13:23:55,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b5c9f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55, skipping insertion in model container [2018-11-23 13:23:55,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 13:23:55,105 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 13:23:55,214 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 13:23:55,216 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 13:23:55,226 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 13:23:55,235 INFO L195 MainTranslator]: Completed translation [2018-11-23 13:23:55,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55 WrapperNode [2018-11-23 13:23:55,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 13:23:55,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 13:23:55,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 13:23:55,236 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 13:23:55,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 13:23:55,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 13:23:55,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 13:23:55,261 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 13:23:55,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... [2018-11-23 13:23:55,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 13:23:55,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 13:23:55,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 13:23:55,273 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 13:23:55,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:55,364 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-23 13:23:55,364 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-23 13:23:55,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 13:23:55,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 13:23:55,469 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 13:23:55,469 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-23 13:23:55,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:23:55 BoogieIcfgContainer [2018-11-23 13:23:55,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 13:23:55,470 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 13:23:55,470 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 13:23:55,473 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 13:23:55,474 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 13:23:55,474 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 01:23:55" (1/3) ... [2018-11-23 13:23:55,475 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4f3dd673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 01:23:55, skipping insertion in model container [2018-11-23 13:23:55,475 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 13:23:55,476 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:23:55" (2/3) ... [2018-11-23 13:23:55,476 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4f3dd673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 01:23:55, skipping insertion in model container [2018-11-23 13:23:55,476 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 13:23:55,476 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:23:55" (3/3) ... [2018-11-23 13:23:55,478 INFO L375 chiAutomizerObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 13:23:55,529 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 13:23:55,530 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 13:23:55,530 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 13:23:55,530 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 13:23:55,530 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 13:23:55,530 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 13:23:55,530 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 13:23:55,531 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 13:23:55,531 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 13:23:55,543 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2018-11-23 13:23:55,560 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 13:23:55,560 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:23:55,560 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:23:55,566 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 13:23:55,566 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 13:23:55,566 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 13:23:55,566 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2018-11-23 13:23:55,567 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 13:23:55,568 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:23:55,568 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:23:55,568 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 13:23:55,568 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 13:23:55,572 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 6#L27true call main_#t~ret2 := fibonacci(main_~x~0);< 16#fibonacciENTRYtrue [2018-11-23 13:23:55,573 INFO L796 eck$LassoCheckResult]: Loop: 16#fibonacciENTRYtrue ~n := #in~n; 14#L15true assume !(~n < 1); 8#L17true assume !(1 == ~n); 5#L20true call #t~ret0 := fibonacci(~n - 1);< 16#fibonacciENTRYtrue [2018-11-23 13:23:55,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1426, now seen corresponding path program 1 times [2018-11-23 13:23:55,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:55,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:55,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:55,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:55,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:55,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:55,650 INFO L82 PathProgramCache]: Analyzing trace with hash 927640, now seen corresponding path program 1 times [2018-11-23 13:23:55,650 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:55,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:55,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:55,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:55,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:55,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:55,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1316945065, now seen corresponding path program 1 times [2018-11-23 13:23:55,659 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:55,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:55,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:55,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:55,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:55,731 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:23:55,732 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:23:55,732 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:23:55,732 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:23:55,733 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:23:55,733 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:55,733 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:23:55,733 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:23:55,733 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration1_Loop [2018-11-23 13:23:55,733 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:23:55,733 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:23:55,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:55,752 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:55,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:55,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:55,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:55,835 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:23:55,835 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:55,851 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:55,852 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:55,857 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:23:55,857 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:55,873 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:55,873 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:55,875 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:23:55,875 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:55,890 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:55,890 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:55,892 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:23:55,892 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:55,907 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:55,908 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:55,910 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:23:55,910 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:55,926 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:55,926 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:55,945 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:23:55,945 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:55,963 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 13:23:55,964 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:23:55,965 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:23:55,965 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:23:55,965 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:23:55,965 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 13:23:55,965 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:55,965 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:23:55,965 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:23:55,965 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration1_Loop [2018-11-23 13:23:55,965 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:23:55,965 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:23:55,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:55,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:55,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:55,971 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:55,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:56,031 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:23:56,036 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 13:23:56,038 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:56,039 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:56,039 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:56,040 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:56,040 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:56,040 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:56,042 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:56,042 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:56,046 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:23:56,046 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:56,047 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:56,047 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:56,047 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:56,047 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:56,048 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:56,048 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:56,048 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:56,049 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:23:56,050 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:56,051 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:56,051 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:56,051 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:56,051 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:56,051 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:56,052 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:56,052 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:56,053 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:23:56,053 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:56,054 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:56,054 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:56,054 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:56,054 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:56,055 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:56,055 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:56,055 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:56,056 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:23:56,057 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:56,057 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:56,057 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:56,057 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:56,058 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:56,058 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:56,060 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:56,061 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:56,066 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 13:23:56,069 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 13:23:56,069 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 13:23:56,071 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 13:23:56,071 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 13:23:56,071 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 13:23:56,072 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2018-11-23 13:23:56,073 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 13:23:56,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:56,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:56,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:23:56,190 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 [2018-11-23 13:23:56,191 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states. Second operand 4 states. [2018-11-23 13:23:56,281 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states.. Second operand 4 states. Result 46 states and 58 transitions. Complement of second has 12 states. [2018-11-23 13:23:56,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 13:23:56,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 13:23:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-23 13:23:56,285 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-11-23 13:23:56,287 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:56,287 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-11-23 13:23:56,287 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:56,287 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-23 13:23:56,287 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:56,288 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 46 states and 58 transitions. [2018-11-23 13:23:56,292 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 13:23:56,296 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 46 states to 24 states and 33 transitions. [2018-11-23 13:23:56,297 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-23 13:23:56,297 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-23 13:23:56,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-11-23 13:23:56,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:23:56,299 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-11-23 13:23:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-11-23 13:23:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-11-23 13:23:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 13:23:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-11-23 13:23:56,320 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 13:23:56,321 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 13:23:56,321 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 13:23:56,321 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-11-23 13:23:56,322 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 13:23:56,322 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:23:56,322 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:23:56,323 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:23:56,323 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:23:56,323 INFO L794 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 120#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 128#fibonacciENTRY ~n := #in~n; 125#L15 assume !(~n < 1); 126#L17 assume !(1 == ~n); 118#L20 call #t~ret0 := fibonacci(~n - 1);< 119#fibonacciENTRY ~n := #in~n; 122#L15 assume ~n < 1;#res := 0; 123#fibonacciFINAL assume true; 121#fibonacciEXIT >#28#return; 116#L20-1 [2018-11-23 13:23:56,323 INFO L796 eck$LassoCheckResult]: Loop: 116#L20-1 call #t~ret1 := fibonacci(~n - 2);< 117#fibonacciENTRY ~n := #in~n; 133#L15 assume !(~n < 1); 131#L17 assume !(1 == ~n); 115#L20 call #t~ret0 := fibonacci(~n - 1);< 117#fibonacciENTRY ~n := #in~n; 133#L15 assume ~n < 1;#res := 0; 130#fibonacciFINAL assume true; 132#fibonacciEXIT >#28#return; 116#L20-1 [2018-11-23 13:23:56,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:56,324 INFO L82 PathProgramCache]: Analyzing trace with hash -940667652, now seen corresponding path program 1 times [2018-11-23 13:23:56,324 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:56,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:56,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:56,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:56,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 13:23:56,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 13:23:56,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 13:23:56,389 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 13:23:56,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:56,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1564066394, now seen corresponding path program 1 times [2018-11-23 13:23:56,389 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:56,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:56,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:56,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:56,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 13:23:56,444 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 13:23:56,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 13:23:56,444 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 13:23:56,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 13:23:56,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 13:23:56,447 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-23 13:23:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:23:56,539 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-11-23 13:23:56,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 13:23:56,540 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-11-23 13:23:56,542 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 13:23:56,544 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-11-23 13:23:56,544 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-11-23 13:23:56,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-11-23 13:23:56,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-11-23 13:23:56,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:23:56,545 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 13:23:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-11-23 13:23:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-23 13:23:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 13:23:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-11-23 13:23:56,551 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 13:23:56,551 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 13:23:56,551 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 13:23:56,551 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-11-23 13:23:56,553 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 13:23:56,553 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:23:56,553 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:23:56,553 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:23:56,554 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 13:23:56,554 INFO L794 eck$LassoCheckResult]: Stem: 190#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 184#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 191#fibonacciENTRY ~n := #in~n; 188#L15 assume !(~n < 1); 189#L17 assume !(1 == ~n); 183#L20 call #t~ret0 := fibonacci(~n - 1);< 185#fibonacciENTRY ~n := #in~n; 186#L15 assume !(~n < 1); 187#L17 assume 1 == ~n;#res := 1; 192#fibonacciFINAL assume true; 199#fibonacciEXIT >#28#return; 180#L20-1 [2018-11-23 13:23:56,554 INFO L796 eck$LassoCheckResult]: Loop: 180#L20-1 call #t~ret1 := fibonacci(~n - 2);< 182#fibonacciENTRY ~n := #in~n; 200#L15 assume !(~n < 1); 195#L17 assume !(1 == ~n); 179#L20 call #t~ret0 := fibonacci(~n - 1);< 182#fibonacciENTRY ~n := #in~n; 200#L15 assume !(~n < 1); 195#L17 assume 1 == ~n;#res := 1; 196#fibonacciFINAL assume true; 197#fibonacciEXIT >#28#return; 180#L20-1 [2018-11-23 13:23:56,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash 904098378, now seen corresponding path program 1 times [2018-11-23 13:23:56,554 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:56,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:56,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:56,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:56,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:23:56,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:23:56,590 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:23:56,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:56,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:23:56,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:23:56,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 13:23:56,628 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 13:23:56,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1241393440, now seen corresponding path program 1 times [2018-11-23 13:23:56,629 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:56,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:56,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:56,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:56,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:56,738 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:23:56,739 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:23:56,739 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:23:56,739 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:23:56,739 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:23:56,739 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:56,739 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:23:56,739 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:23:56,739 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration3_Loop [2018-11-23 13:23:56,739 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:23:56,739 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:23:56,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:56,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:56,749 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:56,751 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:56,785 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:23:56,785 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:56,787 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:56,787 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:56,790 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:23:56,790 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:56,806 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:56,806 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:56,825 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:23:56,825 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:57,478 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 13:23:57,480 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:23:57,480 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:23:57,480 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:23:57,480 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:23:57,481 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 13:23:57,481 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:57,481 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:23:57,481 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:23:57,481 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration3_Loop [2018-11-23 13:23:57,481 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:23:57,481 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:23:57,482 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:57,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:57,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:57,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:57,528 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:23:57,528 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 13:23:57,528 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:57,529 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:57,529 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:57,529 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:57,529 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:57,530 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:57,530 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:57,531 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:57,538 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 13:23:57,541 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 13:23:57,541 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 13:23:57,541 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 13:23:57,542 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 13:23:57,542 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 13:23:57,542 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2018-11-23 13:23:57,542 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 13:23:57,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:57,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:57,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:23:57,643 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-23 13:23:57,643 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-23 13:23:57,761 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2018-11-23 13:23:57,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 13:23:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 13:23:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 13:23:57,764 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-11-23 13:23:57,764 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:57,765 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-11-23 13:23:57,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:57,765 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-11-23 13:23:57,766 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:57,766 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-11-23 13:23:57,771 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 13:23:57,775 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-11-23 13:23:57,775 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-11-23 13:23:57,776 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 13:23:57,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-11-23 13:23:57,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:23:57,776 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-11-23 13:23:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-11-23 13:23:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-11-23 13:23:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 13:23:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-11-23 13:23:57,785 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-11-23 13:23:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 13:23:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 13:23:57,786 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-11-23 13:23:57,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:23:57,835 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-11-23 13:23:57,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 13:23:57,836 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-11-23 13:23:57,838 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 13:23:57,840 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-11-23 13:23:57,840 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-11-23 13:23:57,841 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 13:23:57,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-11-23 13:23:57,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:23:57,841 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-11-23 13:23:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-11-23 13:23:57,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-11-23 13:23:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 13:23:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-11-23 13:23:57,848 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 13:23:57,848 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 13:23:57,848 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 13:23:57,848 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-11-23 13:23:57,850 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 13:23:57,850 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:23:57,850 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:23:57,851 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 13:23:57,851 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 13:23:57,851 INFO L794 eck$LassoCheckResult]: Stem: 706#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 696#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 711#fibonacciENTRY ~n := #in~n; 709#L15 assume !(~n < 1); 710#L17 assume !(1 == ~n); 695#L20 call #t~ret0 := fibonacci(~n - 1);< 697#fibonacciENTRY ~n := #in~n; 714#L15 assume !(~n < 1); 718#L17 assume !(1 == ~n); 713#L20 call #t~ret0 := fibonacci(~n - 1);< 697#fibonacciENTRY ~n := #in~n; 714#L15 assume !(~n < 1); 718#L17 assume !(1 == ~n); 713#L20 call #t~ret0 := fibonacci(~n - 1);< 697#fibonacciENTRY ~n := #in~n; 715#L15 assume !(~n < 1); 754#L17 assume 1 == ~n;#res := 1; 753#fibonacciFINAL assume true; 752#fibonacciEXIT >#28#return; 728#L20-1 call #t~ret1 := fibonacci(~n - 2);< 751#fibonacciENTRY ~n := #in~n; 781#L15 assume ~n < 1;#res := 0; 780#fibonacciFINAL assume true; 777#fibonacciEXIT >#30#return; 776#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 774#fibonacciFINAL assume true; 772#fibonacciEXIT >#28#return; 692#L20-1 [2018-11-23 13:23:57,851 INFO L796 eck$LassoCheckResult]: Loop: 692#L20-1 call #t~ret1 := fibonacci(~n - 2);< 694#fibonacciENTRY ~n := #in~n; 758#L15 assume !(~n < 1); 716#L17 assume !(1 == ~n); 691#L20 call #t~ret0 := fibonacci(~n - 1);< 694#fibonacciENTRY ~n := #in~n; 758#L15 assume !(~n < 1); 716#L17 assume 1 == ~n;#res := 1; 717#fibonacciFINAL assume true; 770#fibonacciEXIT >#28#return; 692#L20-1 [2018-11-23 13:23:57,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:57,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1397716613, now seen corresponding path program 1 times [2018-11-23 13:23:57,852 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:57,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:57,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:57,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:57,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 13:23:57,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:23:57,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:23:57,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:57,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 13:23:57,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:23:57,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 13:23:57,963 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 13:23:57,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:57,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1241393440, now seen corresponding path program 2 times [2018-11-23 13:23:57,963 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:57,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:57,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:57,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:57,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:58,030 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:23:58,030 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:23:58,031 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:23:58,031 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:23:58,031 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:23:58,031 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:58,031 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:23:58,031 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:23:58,031 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration4_Loop [2018-11-23 13:23:58,031 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:23:58,032 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:23:58,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:58,040 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:58,042 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:58,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:58,068 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:23:58,068 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:58,070 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:58,070 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:58,089 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:23:58,089 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:58,415 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 13:23:58,417 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:23:58,417 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:23:58,417 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:23:58,417 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:23:58,417 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 13:23:58,417 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:58,417 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:23:58,417 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:23:58,418 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration4_Loop [2018-11-23 13:23:58,418 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:23:58,418 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:23:58,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:58,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:58,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:58,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:58,450 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:23:58,450 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 13:23:58,451 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:58,451 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:58,452 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:58,452 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:58,452 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:58,452 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:58,452 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:58,452 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:58,453 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:23:58,454 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:58,454 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:58,454 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:58,454 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:58,454 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:58,454 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:58,455 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:58,455 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:58,455 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:23:58,456 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:58,456 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:58,456 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:58,456 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:58,456 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:58,456 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:58,456 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:58,457 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:58,457 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:23:58,457 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:58,458 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:58,458 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:58,458 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:58,458 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:58,458 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:58,459 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:58,459 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:58,462 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 13:23:58,465 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 13:23:58,465 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 13:23:58,466 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 13:23:58,466 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 13:23:58,466 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 13:23:58,466 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2018-11-23 13:23:58,467 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 13:23:58,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:58,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:58,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:23:58,580 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-23 13:23:58,580 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 13:23:58,681 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 162 states and 216 transitions. Complement of second has 25 states. [2018-11-23 13:23:58,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 13:23:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 13:23:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 13:23:58,682 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 13:23:58,683 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:58,683 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:23:58,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:58,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:58,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:23:58,770 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-23 13:23:58,770 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 13:23:58,868 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 287 states and 386 transitions. Complement of second has 25 states. [2018-11-23 13:23:58,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 13:23:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 13:23:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-11-23 13:23:58,870 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 13:23:58,870 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:58,870 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:23:58,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:58,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:58,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:23:58,986 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 5 loop predicates [2018-11-23 13:23:58,986 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 13:23:59,147 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 825 states and 1090 transitions. Complement of second has 112 states. [2018-11-23 13:23:59,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 13:23:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 13:23:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-11-23 13:23:59,150 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 13:23:59,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:59,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-11-23 13:23:59,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:59,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-11-23 13:23:59,153 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:59,153 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-11-23 13:23:59,167 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 13:23:59,177 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-11-23 13:23:59,178 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-23 13:23:59,179 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-11-23 13:23:59,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-11-23 13:23:59,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:23:59,180 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-11-23 13:23:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-11-23 13:23:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-11-23 13:23:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-23 13:23:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-11-23 13:23:59,213 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-11-23 13:23:59,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 13:23:59,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 13:23:59,215 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-11-23 13:23:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:23:59,357 INFO L93 Difference]: Finished difference Result 497 states and 785 transitions. [2018-11-23 13:23:59,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 13:23:59,358 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 785 transitions. [2018-11-23 13:23:59,367 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 13:23:59,376 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 782 transitions. [2018-11-23 13:23:59,376 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-11-23 13:23:59,377 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-23 13:23:59,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 782 transitions. [2018-11-23 13:23:59,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:23:59,377 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 782 transitions. [2018-11-23 13:23:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 782 transitions. [2018-11-23 13:23:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 369. [2018-11-23 13:23:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-11-23 13:23:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 522 transitions. [2018-11-23 13:23:59,403 INFO L728 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-23 13:23:59,403 INFO L608 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-23 13:23:59,404 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 13:23:59,404 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 522 transitions. [2018-11-23 13:23:59,407 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 13:23:59,407 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:23:59,407 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:23:59,408 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-23 13:23:59,408 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 13:23:59,408 INFO L794 eck$LassoCheckResult]: Stem: 3550#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 3551#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 3552#fibonacciENTRY ~n := #in~n; 3592#L15 assume !(~n < 1); 3591#L17 assume !(1 == ~n); 3587#L20 call #t~ret0 := fibonacci(~n - 1);< 3589#fibonacciENTRY ~n := #in~n; 3590#L15 assume !(~n < 1); 3586#L17 assume !(1 == ~n); 3554#L20 call #t~ret0 := fibonacci(~n - 1);< 3583#fibonacciENTRY ~n := #in~n; 3584#L15 assume !(~n < 1); 3588#L17 assume !(1 == ~n); 3555#L20 call #t~ret0 := fibonacci(~n - 1);< 3583#fibonacciENTRY ~n := #in~n; 3585#L15 assume !(~n < 1); 3553#L17 assume 1 == ~n;#res := 1; 3556#fibonacciFINAL assume true; 3627#fibonacciEXIT >#28#return; 3609#L20-1 call #t~ret1 := fibonacci(~n - 2);< 3617#fibonacciENTRY ~n := #in~n; 3726#L15 assume !(~n < 1); 3657#L17 assume !(1 == ~n); 3659#L20 call #t~ret0 := fibonacci(~n - 1);< 3880#fibonacciENTRY ~n := #in~n; 3884#L15 assume !(~n < 1); 3882#L17 assume !(1 == ~n); 3579#L20 call #t~ret0 := fibonacci(~n - 1);< 3582#fibonacciENTRY [2018-11-23 13:23:59,409 INFO L796 eck$LassoCheckResult]: Loop: 3582#fibonacciENTRY ~n := #in~n; 3577#L15 assume !(~n < 1); 3581#L17 assume !(1 == ~n); 3578#L20 call #t~ret0 := fibonacci(~n - 1);< 3582#fibonacciENTRY [2018-11-23 13:23:59,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1149422575, now seen corresponding path program 1 times [2018-11-23 13:23:59,409 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:59,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:59,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:59,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:23:59,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-23 13:23:59,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:23:59,460 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:23:59,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:59,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 13:23:59,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:23:59,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-23 13:23:59,600 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 13:23:59,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:59,600 INFO L82 PathProgramCache]: Analyzing trace with hash 927640, now seen corresponding path program 2 times [2018-11-23 13:23:59,600 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:23:59,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:23:59,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:59,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 13:23:59,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:23:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:23:59,629 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:23:59,629 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:23:59,629 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:23:59,629 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:23:59,630 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:23:59,630 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:59,630 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:23:59,630 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:23:59,630 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration5_Loop [2018-11-23 13:23:59,630 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:23:59,630 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:23:59,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,633 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,639 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,641 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,667 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:23:59,668 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:59,670 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:59,670 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:59,672 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:23:59,672 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:59,691 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:59,691 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:59,693 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:23:59,693 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:59,711 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:23:59,711 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:59,732 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:23:59,732 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:23:59,753 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 13:23:59,754 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:23:59,754 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:23:59,754 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:23:59,754 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:23:59,754 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 13:23:59,755 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:23:59,755 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:23:59,755 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:23:59,755 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration5_Loop [2018-11-23 13:23:59,755 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:23:59,755 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:23:59,756 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,762 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,769 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:23:59,794 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:23:59,794 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 13:23:59,794 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:23:59,795 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:23:59,795 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:23:59,795 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:23:59,795 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:23:59,795 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:23:59,796 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:23:59,796 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:23:59,798 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 13:23:59,799 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 13:23:59,799 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 13:23:59,800 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 13:23:59,800 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 13:23:59,800 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 13:23:59,800 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2018-11-23 13:23:59,800 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 13:23:59,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:59,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:59,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:23:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:23:59,878 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 13:23:59,878 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 13:23:59,935 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-11-23 13:23:59,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 13:23:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 13:23:59,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 13:23:59,937 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 13:23:59,937 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:23:59,937 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:23:59,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:23:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:23:59,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:00,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:00,025 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 13:24:00,026 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 13:24:00,074 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-11-23 13:24:00,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 13:24:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 13:24:00,075 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 13:24:00,076 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:00,076 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:24:00,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:00,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:00,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:00,150 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 3 loop predicates [2018-11-23 13:24:00,150 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 13:24:00,221 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 494 states and 656 transitions. Complement of second has 14 states. [2018-11-23 13:24:00,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 13:24:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-11-23 13:24:00,223 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 13:24:00,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:00,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-11-23 13:24:00,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:00,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-11-23 13:24:00,225 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:00,225 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 494 states and 656 transitions. [2018-11-23 13:24:00,232 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 13:24:00,237 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 494 states to 407 states and 567 transitions. [2018-11-23 13:24:00,238 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-11-23 13:24:00,238 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 162 [2018-11-23 13:24:00,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 567 transitions. [2018-11-23 13:24:00,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:00,239 INFO L705 BuchiCegarLoop]: Abstraction has 407 states and 567 transitions. [2018-11-23 13:24:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states and 567 transitions. [2018-11-23 13:24:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2018-11-23 13:24:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-11-23 13:24:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 546 transitions. [2018-11-23 13:24:00,258 INFO L728 BuchiCegarLoop]: Abstraction has 393 states and 546 transitions. [2018-11-23 13:24:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 13:24:00,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-11-23 13:24:00,259 INFO L87 Difference]: Start difference. First operand 393 states and 546 transitions. Second operand 14 states. [2018-11-23 13:24:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:24:00,501 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2018-11-23 13:24:00,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 13:24:00,502 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 274 states and 348 transitions. [2018-11-23 13:24:00,505 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 13:24:00,508 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 274 states to 244 states and 313 transitions. [2018-11-23 13:24:00,508 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 119 [2018-11-23 13:24:00,508 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-11-23 13:24:00,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 244 states and 313 transitions. [2018-11-23 13:24:00,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:00,509 INFO L705 BuchiCegarLoop]: Abstraction has 244 states and 313 transitions. [2018-11-23 13:24:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states and 313 transitions. [2018-11-23 13:24:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 203. [2018-11-23 13:24:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-23 13:24:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-23 13:24:00,516 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 13:24:00,516 INFO L608 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 13:24:00,516 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 13:24:00,516 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 203 states and 260 transitions. [2018-11-23 13:24:00,517 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 13:24:00,518 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:24:00,518 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:24:00,519 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 13:24:00,519 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 13:24:00,520 INFO L794 eck$LassoCheckResult]: Stem: 6312#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 6313#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 6314#fibonacciENTRY ~n := #in~n; 6403#L15 assume !(~n < 1); 6402#L17 assume !(1 == ~n); 6398#L20 call #t~ret0 := fibonacci(~n - 1);< 6401#fibonacciENTRY ~n := #in~n; 6400#L15 assume !(~n < 1); 6399#L17 assume !(1 == ~n); 6393#L20 call #t~ret0 := fibonacci(~n - 1);< 6397#fibonacciENTRY ~n := #in~n; 6395#L15 assume !(~n < 1); 6396#L17 assume !(1 == ~n); 6334#L20 call #t~ret0 := fibonacci(~n - 1);< 6391#fibonacciENTRY ~n := #in~n; 6392#L15 assume !(~n < 1); 6394#L17 assume !(1 == ~n); 6333#L20 call #t~ret0 := fibonacci(~n - 1);< 6391#fibonacciENTRY ~n := #in~n; 6392#L15 assume !(~n < 1); 6394#L17 assume !(1 == ~n); 6333#L20 call #t~ret0 := fibonacci(~n - 1);< 6391#fibonacciENTRY ~n := #in~n; 6387#L15 assume !(~n < 1); 6388#L17 assume 1 == ~n;#res := 1; 6493#fibonacciFINAL assume true; 6492#fibonacciEXIT >#28#return; 6308#L20-1 call #t~ret1 := fibonacci(~n - 2);< 6315#fibonacciENTRY ~n := #in~n; 6307#L15 assume ~n < 1;#res := 0; 6309#fibonacciFINAL assume true; 6495#fibonacciEXIT >#30#return; 6297#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 6482#fibonacciFINAL assume true; 6468#fibonacciEXIT >#28#return; 6296#L20-1 call #t~ret1 := fibonacci(~n - 2);< 6466#fibonacciENTRY ~n := #in~n; 6485#L15 assume !(~n < 1); 6336#L17 assume !(1 == ~n); 6320#L20 call #t~ret0 := fibonacci(~n - 1);< 6303#fibonacciENTRY ~n := #in~n; 6382#L15 assume !(~n < 1); 6373#L17 assume !(1 == ~n); 6352#L20 call #t~ret0 := fibonacci(~n - 1);< 6355#fibonacciENTRY ~n := #in~n; 6371#L15 assume !(~n < 1); 6369#L17 assume !(1 == ~n); 6354#L20 [2018-11-23 13:24:00,520 INFO L796 eck$LassoCheckResult]: Loop: 6354#L20 call #t~ret0 := fibonacci(~n - 1);< 6355#fibonacciENTRY ~n := #in~n; 6371#L15 assume !(~n < 1); 6369#L17 assume !(1 == ~n); 6354#L20 [2018-11-23 13:24:00,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:00,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1438652912, now seen corresponding path program 2 times [2018-11-23 13:24:00,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:00,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:00,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:00,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:24:00,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-23 13:24:00,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:24:00,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:24:00,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 13:24:00,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 13:24:00,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 13:24:00,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-23 13:24:00,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:24:00,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-11-23 13:24:00,768 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 13:24:00,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:00,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1728010, now seen corresponding path program 3 times [2018-11-23 13:24:00,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:00,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:00,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:00,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:24:00,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:00,798 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:00,798 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:00,798 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:00,798 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:00,798 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:24:00,799 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:00,799 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:00,799 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:00,799 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration6_Loop [2018-11-23 13:24:00,799 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:00,799 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:00,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:00,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:00,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:00,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:00,826 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:00,827 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:00,830 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:00,830 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:00,851 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:24:00,851 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:01,745 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 13:24:01,747 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:01,747 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:01,747 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:01,747 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:01,747 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 13:24:01,747 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:01,747 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:01,747 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:01,747 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration6_Loop [2018-11-23 13:24:01,747 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:01,747 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:01,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:01,758 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:01,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:01,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:01,780 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:01,780 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 13:24:01,781 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:24:01,781 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:01,781 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:01,781 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:01,781 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:01,781 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:01,782 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:01,782 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:01,784 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 13:24:01,785 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 13:24:01,786 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 13:24:01,786 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 13:24:01,786 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 13:24:01,786 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 13:24:01,786 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2018-11-23 13:24:01,786 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 13:24:01,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:01,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:01,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:01,862 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 13:24:01,862 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 13:24:01,892 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 215 states and 273 transitions. Complement of second has 18 states. [2018-11-23 13:24:01,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 13:24:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 13:24:01,893 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 13:24:01,893 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:01,894 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:24:01,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:01,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:01,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:01,975 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 13:24:01,975 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 13:24:02,023 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 221 states and 279 transitions. Complement of second has 17 states. [2018-11-23 13:24:02,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 13:24:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 13:24:02,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 13:24:02,025 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:02,025 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:24:02,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:02,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:02,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:02,130 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 4 loop predicates [2018-11-23 13:24:02,130 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 13:24:02,184 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 271 states and 343 transitions. Complement of second has 27 states. [2018-11-23 13:24:02,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 13:24:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 13:24:02,187 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 13:24:02,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:02,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2018-11-23 13:24:02,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:02,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 8 letters. [2018-11-23 13:24:02,189 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:02,189 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 271 states and 343 transitions. [2018-11-23 13:24:02,191 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 13:24:02,193 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 271 states to 207 states and 265 transitions. [2018-11-23 13:24:02,193 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 79 [2018-11-23 13:24:02,194 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2018-11-23 13:24:02,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 265 transitions. [2018-11-23 13:24:02,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:02,198 INFO L705 BuchiCegarLoop]: Abstraction has 207 states and 265 transitions. [2018-11-23 13:24:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states and 265 transitions. [2018-11-23 13:24:02,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-11-23 13:24:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-23 13:24:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-23 13:24:02,204 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 13:24:02,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 13:24:02,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-11-23 13:24:02,204 INFO L87 Difference]: Start difference. First operand 203 states and 260 transitions. Second operand 20 states. [2018-11-23 13:24:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:24:02,470 INFO L93 Difference]: Finished difference Result 341 states and 458 transitions. [2018-11-23 13:24:02,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 13:24:02,471 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 341 states and 458 transitions. [2018-11-23 13:24:02,473 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 13:24:02,476 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 341 states to 315 states and 426 transitions. [2018-11-23 13:24:02,476 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2018-11-23 13:24:02,476 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-11-23 13:24:02,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 315 states and 426 transitions. [2018-11-23 13:24:02,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:02,477 INFO L705 BuchiCegarLoop]: Abstraction has 315 states and 426 transitions. [2018-11-23 13:24:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states and 426 transitions. [2018-11-23 13:24:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 282. [2018-11-23 13:24:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-11-23 13:24:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 383 transitions. [2018-11-23 13:24:02,483 INFO L728 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-11-23 13:24:02,483 INFO L608 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-11-23 13:24:02,483 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-23 13:24:02,483 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 282 states and 383 transitions. [2018-11-23 13:24:02,484 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 13:24:02,484 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 13:24:02,484 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 13:24:02,487 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2018-11-23 13:24:02,487 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 13:24:02,487 INFO L794 eck$LassoCheckResult]: Stem: 8511#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 8512#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 8513#fibonacciENTRY ~n := #in~n; 8603#L15 assume !(~n < 1); 8601#L17 assume !(1 == ~n); 8598#L20 call #t~ret0 := fibonacci(~n - 1);< 8599#fibonacciENTRY ~n := #in~n; 8615#L15 assume !(~n < 1); 8613#L17 assume !(1 == ~n); 8609#L20 call #t~ret0 := fibonacci(~n - 1);< 8612#fibonacciENTRY ~n := #in~n; 8669#L15 assume !(~n < 1); 8666#L17 assume !(1 == ~n); 8605#L20 call #t~ret0 := fibonacci(~n - 1);< 8610#fibonacciENTRY ~n := #in~n; 8630#L15 assume !(~n < 1); 8627#L17 assume !(1 == ~n); 8503#L20 call #t~ret0 := fibonacci(~n - 1);< 8504#fibonacciENTRY ~n := #in~n; 8720#L15 assume !(~n < 1); 8702#L17 assume !(1 == ~n); 8502#L20 call #t~ret0 := fibonacci(~n - 1);< 8504#fibonacciENTRY ~n := #in~n; 8720#L15 assume !(~n < 1); 8702#L17 assume !(1 == ~n); 8502#L20 call #t~ret0 := fibonacci(~n - 1);< 8504#fibonacciENTRY ~n := #in~n; 8720#L15 assume !(~n < 1); 8702#L17 assume !(1 == ~n); 8502#L20 call #t~ret0 := fibonacci(~n - 1);< 8504#fibonacciENTRY ~n := #in~n; 8722#L15 assume !(~n < 1); 8772#L17 assume 1 == ~n;#res := 1; 8771#fibonacciFINAL assume true; 8769#fibonacciEXIT >#28#return; 8531#L20-1 call #t~ret1 := fibonacci(~n - 2);< 8532#fibonacciENTRY ~n := #in~n; 8764#L15 assume ~n < 1;#res := 0; 8762#fibonacciFINAL assume true; 8760#fibonacciEXIT >#30#return; 8759#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 8756#fibonacciFINAL assume true; 8752#fibonacciEXIT >#28#return; 8747#L20-1 call #t~ret1 := fibonacci(~n - 2);< 8749#fibonacciENTRY ~n := #in~n; 8758#L15 assume !(~n < 1); 8754#L17 assume 1 == ~n;#res := 1; 8750#fibonacciFINAL assume true; 8746#fibonacciEXIT >#30#return; 8742#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 8740#fibonacciFINAL assume true; 8735#fibonacciEXIT >#28#return; 8618#L20-1 call #t~ret1 := fibonacci(~n - 2);< 8621#fibonacciENTRY ~n := #in~n; 8757#L15 assume !(~n < 1); 8753#L17 assume !(1 == ~n); 8507#L20 call #t~ret0 := fibonacci(~n - 1);< 8501#fibonacciENTRY ~n := #in~n; 8509#L15 assume !(~n < 1); 8510#L17 assume !(1 == ~n); 8551#L20 call #t~ret0 := fibonacci(~n - 1);< 8554#fibonacciENTRY ~n := #in~n; 8570#L15 assume !(~n < 1); 8569#L17 assume !(1 == ~n); 8552#L20 [2018-11-23 13:24:02,487 INFO L796 eck$LassoCheckResult]: Loop: 8552#L20 call #t~ret0 := fibonacci(~n - 1);< 8554#fibonacciENTRY ~n := #in~n; 8570#L15 assume !(~n < 1); 8569#L17 assume !(1 == ~n); 8552#L20 [2018-11-23 13:24:02,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:02,488 INFO L82 PathProgramCache]: Analyzing trace with hash -570292781, now seen corresponding path program 3 times [2018-11-23 13:24:02,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:02,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:02,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:02,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:24:02,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 153 proven. 80 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-23 13:24:02,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 13:24:02,614 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 13:24:02,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 13:24:02,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-23 13:24:02,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 13:24:02,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-11-23 13:24:02,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 13:24:02,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 24 [2018-11-23 13:24:02,696 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 13:24:02,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1728010, now seen corresponding path program 4 times [2018-11-23 13:24:02,697 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 13:24:02,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 13:24:02,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:02,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 13:24:02,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 13:24:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 13:24:02,717 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:02,718 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:02,718 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:02,718 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:02,718 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 13:24:02,718 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:02,718 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:02,718 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:02,718 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration7_Loop [2018-11-23 13:24:02,718 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:02,718 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:02,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:02,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:02,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:02,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:02,744 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:02,744 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:02,746 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:02,746 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:02,749 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 13:24:02,749 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:02,764 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 13:24:02,764 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_57603062-aeb2-40f0-bd01-204dd695b656/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:02,782 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 13:24:02,782 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 13:24:04,001 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 13:24:04,003 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 13:24:04,003 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 13:24:04,003 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 13:24:04,003 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 13:24:04,003 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 13:24:04,004 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 13:24:04,004 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 13:24:04,004 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 13:24:04,004 INFO L131 ssoRankerPreferences]: Filename of dumped script: Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c_Iteration7_Loop [2018-11-23 13:24:04,004 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 13:24:04,004 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 13:24:04,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:04,006 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:04,010 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:04,011 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 13:24:04,029 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 13:24:04,029 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 13:24:04,029 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:24:04,029 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:04,030 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:04,030 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:04,030 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:04,030 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:04,030 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:04,030 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:04,031 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 13:24:04,031 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 13:24:04,032 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 13:24:04,032 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 13:24:04,032 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 13:24:04,032 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 13:24:04,032 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 13:24:04,033 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 13:24:04,033 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 13:24:04,035 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 13:24:04,036 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 13:24:04,036 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 13:24:04,037 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 13:24:04,037 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 13:24:04,037 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 13:24:04,037 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2018-11-23 13:24:04,037 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 13:24:04,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:04,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:04,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:04,131 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 13:24:04,131 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-11-23 13:24:04,170 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 297 states and 399 transitions. Complement of second has 18 states. [2018-11-23 13:24:04,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 13:24:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 13:24:04,171 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 13:24:04,171 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:04,171 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:24:04,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:04,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:04,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:04,275 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 13:24:04,275 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-11-23 13:24:04,323 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 303 states and 405 transitions. Complement of second has 17 states. [2018-11-23 13:24:04,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 13:24:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 13:24:04,324 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 13:24:04,324 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:04,324 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 13:24:04,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 13:24:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:04,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 13:24:04,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 13:24:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 13:24:04,416 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 4 loop predicates [2018-11-23 13:24:04,416 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-11-23 13:24:04,456 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 361 states and 481 transitions. Complement of second has 27 states. [2018-11-23 13:24:04,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 13:24:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 13:24:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 13:24:04,458 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 13:24:04,458 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:04,458 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 4 letters. [2018-11-23 13:24:04,458 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:04,458 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 8 letters. [2018-11-23 13:24:04,459 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 13:24:04,459 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 361 states and 481 transitions. [2018-11-23 13:24:04,462 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 13:24:04,465 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 361 states to 286 states and 388 transitions. [2018-11-23 13:24:04,465 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2018-11-23 13:24:04,465 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 128 [2018-11-23 13:24:04,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 286 states and 388 transitions. [2018-11-23 13:24:04,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 13:24:04,465 INFO L705 BuchiCegarLoop]: Abstraction has 286 states and 388 transitions. [2018-11-23 13:24:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states and 388 transitions. [2018-11-23 13:24:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2018-11-23 13:24:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-11-23 13:24:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 383 transitions. [2018-11-23 13:24:04,472 INFO L728 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-11-23 13:24:04,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-23 13:24:04,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2018-11-23 13:24:04,473 INFO L87 Difference]: Start difference. First operand 282 states and 383 transitions. Second operand 24 states. [2018-11-23 13:24:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 13:24:04,824 INFO L93 Difference]: Finished difference Result 433 states and 595 transitions. [2018-11-23 13:24:04,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-23 13:24:04,825 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 433 states and 595 transitions. [2018-11-23 13:24:04,827 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 13:24:04,828 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 433 states to 0 states and 0 transitions. [2018-11-23 13:24:04,828 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 13:24:04,828 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 13:24:04,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 13:24:04,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 13:24:04,828 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 13:24:04,828 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 13:24:04,828 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 13:24:04,828 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-23 13:24:04,828 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 13:24:04,828 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 13:24:04,828 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 13:24:04,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 01:24:04 BoogieIcfgContainer [2018-11-23 13:24:04,834 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 13:24:04,834 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 13:24:04,834 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 13:24:04,835 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 13:24:04,835 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:23:55" (3/4) ... [2018-11-23 13:24:04,837 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 13:24:04,837 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 13:24:04,838 INFO L168 Benchmark]: Toolchain (without parser) took 9756.29 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 320.3 MB). Free memory was 953.8 MB in the beginning and 1.2 GB in the end (delta: -212.3 MB). Peak memory consumption was 108.0 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:04,839 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 13:24:04,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.09 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:04,839 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.06 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:04,840 INFO L168 Benchmark]: Boogie Preprocessor took 11.55 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 13:24:04,840 INFO L168 Benchmark]: RCFGBuilder took 196.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -194.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:04,841 INFO L168 Benchmark]: BuchiAutomizer took 9364.11 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 170.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -31.0 MB). Peak memory consumption was 139.4 MB. Max. memory is 11.5 GB. [2018-11-23 13:24:04,841 INFO L168 Benchmark]: Witness Printer took 2.82 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 13:24:04,844 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 153.09 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.06 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.55 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 196.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -194.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 9364.11 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 170.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -31.0 MB). Peak memory consumption was 139.4 MB. Max. memory is 11.5 GB. * Witness Printer took 2.82 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (6 trivial, 2 deterministic, 4 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 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 6 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 9.3s and 8 iterations. TraceHistogramMax:13. Analysis of lassos took 5.4s. Construction of modules took 0.9s. Büchi inclusion checks took 2.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 330 StatesRemovedByMinimization, 10 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 369 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 238 SDtfs, 740 SDslu, 328 SDs, 0 SdLazy, 1266 SolverSat, 569 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf98 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq187 hnf92 smp81 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 9ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...