./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 21:05:02,480 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 21:05:02,481 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 21:05:02,487 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 21:05:02,487 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 21:05:02,487 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 21:05:02,488 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 21:05:02,489 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 21:05:02,490 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 21:05:02,490 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 21:05:02,491 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 21:05:02,491 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 21:05:02,491 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 21:05:02,492 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 21:05:02,492 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 21:05:02,493 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 21:05:02,493 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 21:05:02,494 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 21:05:02,495 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 21:05:02,496 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 21:05:02,496 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 21:05:02,497 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 21:05:02,498 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 21:05:02,498 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 21:05:02,498 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 21:05:02,499 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 21:05:02,499 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 21:05:02,500 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 21:05:02,500 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 21:05:02,501 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 21:05:02,501 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 21:05:02,501 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 21:05:02,501 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 21:05:02,502 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 21:05:02,502 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 21:05:02,502 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 21:05:02,503 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-12-02 21:05:02,510 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 21:05:02,510 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 21:05:02,511 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 21:05:02,511 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 21:05:02,511 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 21:05:02,512 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-02 21:05:02,512 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-02 21:05:02,512 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-02 21:05:02,512 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-02 21:05:02,512 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-02 21:05:02,512 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-02 21:05:02,512 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 21:05:02,512 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 21:05:02,513 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 21:05:02,513 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 21:05:02,513 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 21:05:02,513 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 21:05:02,513 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-02 21:05:02,513 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-02 21:05:02,513 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-02 21:05:02,513 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 21:05:02,514 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 21:05:02,514 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-02 21:05:02,514 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 21:05:02,514 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-02 21:05:02,514 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 21:05:02,514 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 21:05:02,514 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-02 21:05:02,514 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 21:05:02,515 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 21:05:02,515 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-02 21:05:02,515 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-02 21:05:02,515 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_4eab6828-c318-44ff-aa80-da6207a5ec94/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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2018-12-02 21:05:02,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 21:05:02,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 21:05:02,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 21:05:02,546 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 21:05:02,546 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 21:05:02,547 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-12-02 21:05:02,585 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/data/f86a02c58/2bf1c1951e754e0cb8d87d75eb836ad4/FLAG038b19c1b [2018-12-02 21:05:02,867 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 21:05:02,867 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-12-02 21:05:02,871 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/data/f86a02c58/2bf1c1951e754e0cb8d87d75eb836ad4/FLAG038b19c1b [2018-12-02 21:05:02,879 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/data/f86a02c58/2bf1c1951e754e0cb8d87d75eb836ad4 [2018-12-02 21:05:02,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 21:05:02,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 21:05:02,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 21:05:02,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 21:05:02,884 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 21:05:02,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:02,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3163dfbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02, skipping insertion in model container [2018-12-02 21:05:02,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:02,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 21:05:02,898 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 21:05:02,979 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 21:05:02,981 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 21:05:02,991 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 21:05:02,998 INFO L195 MainTranslator]: Completed translation [2018-12-02 21:05:02,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02 WrapperNode [2018-12-02 21:05:02,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 21:05:02,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 21:05:02,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 21:05:02,999 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 21:05:03,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:03,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:03,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 21:05:03,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 21:05:03,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 21:05:03,017 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 21:05:03,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:03,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:03,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:03,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:03,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:03,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:03,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... [2018-12-02 21:05:03,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 21:05:03,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 21:05:03,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 21:05:03,026 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 21:05:03,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 21:05:03,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 21:05:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-12-02 21:05:03,086 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-12-02 21:05:03,160 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 21:05:03,161 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-02 21:05:03,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:05:03 BoogieIcfgContainer [2018-12-02 21:05:03,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 21:05:03,161 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-02 21:05:03,161 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-02 21:05:03,163 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-02 21:05:03,164 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 21:05:03,164 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 02.12 09:05:02" (1/3) ... [2018-12-02 21:05:03,164 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@50681cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.12 09:05:03, skipping insertion in model container [2018-12-02 21:05:03,165 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 21:05:03,165 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:05:02" (2/3) ... [2018-12-02 21:05:03,165 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@50681cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.12 09:05:03, skipping insertion in model container [2018-12-02 21:05:03,165 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 21:05:03,165 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:05:03" (3/3) ... [2018-12-02 21:05:03,166 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_5_false-unreach-call_true-termination.c [2018-12-02 21:05:03,198 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 21:05:03,198 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-02 21:05:03,198 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-02 21:05:03,198 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-02 21:05:03,198 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 21:05:03,198 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 21:05:03,198 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-02 21:05:03,199 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 21:05:03,199 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-02 21:05:03,207 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-12-02 21:05:03,221 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 21:05:03,221 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 21:05:03,221 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 21:05:03,226 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-02 21:05:03,226 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 21:05:03,226 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-02 21:05:03,226 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-12-02 21:05:03,227 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 21:05:03,228 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 21:05:03,228 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 21:05:03,228 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-02 21:05:03,228 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 21:05:03,232 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-12-02 21:05:03,233 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2018-12-02 21:05:03,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-12-02 21:05:03,237 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:03,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:03,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:03,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:03,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-12-02 21:05:03,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:03,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:03,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:03,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:03,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:03,300 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-12-02 21:05:03,300 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:03,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:03,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:03,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:03,361 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 21:05:03,362 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 21:05:03,362 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 21:05:03,362 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 21:05:03,362 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 21:05:03,362 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:03,362 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 21:05:03,362 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 21:05:03,362 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration1_Loop [2018-12-02 21:05:03,362 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 21:05:03,363 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 21:05:03,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,432 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 21:05:03,432 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:03,435 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 21:05:03,436 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 21:05:03,442 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 21:05:03,442 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:03,458 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 21:05:03,458 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 21:05:03,460 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 21:05:03,460 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:03,474 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 21:05:03,475 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 21:05:03,477 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 21:05:03,477 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:03,491 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 21:05:03,491 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 21:05:03,493 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 21:05:03,494 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:03,508 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 21:05:03,508 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:03,524 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 21:05:03,524 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 21:05:03,544 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 21:05:03,545 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 21:05:03,545 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 21:05:03,545 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 21:05:03,545 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 21:05:03,546 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 21:05:03,546 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:03,546 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 21:05:03,546 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 21:05:03,546 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration1_Loop [2018-12-02 21:05:03,546 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 21:05:03,546 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 21:05:03,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,552 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:03,581 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 21:05:03,584 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 21:05:03,585 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 [2018-12-02 21:05:03,586 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:03,586 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:03,586 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:03,586 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:03,587 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:03,588 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:03,588 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:03,590 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 21:05:03,591 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 [2018-12-02 21:05:03,591 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:03,591 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:03,591 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:03,591 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:03,591 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:03,592 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:03,592 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:03,593 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 21:05:03,593 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 [2018-12-02 21:05:03,593 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:03,593 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:03,594 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:03,594 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:03,594 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:03,594 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:03,594 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:03,595 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 21:05:03,595 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 [2018-12-02 21:05:03,596 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:03,596 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:03,596 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:03,596 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:03,596 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:03,596 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:03,596 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:03,597 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 21:05:03,597 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 [2018-12-02 21:05:03,598 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:03,598 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:03,598 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:03,598 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:03,598 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:03,599 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:03,599 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:03,602 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 21:05:03,604 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 21:05:03,604 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 21:05:03,605 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 21:05:03,605 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 21:05:03,605 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 21:05:03,606 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-12-02 21:05:03,606 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 21:05:03,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:03,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:03,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:03,674 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 [2018-12-02 21:05:03,674 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-12-02 21:05:03,736 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2018-12-02 21:05:03,736 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 [2018-12-02 21:05:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-02 21:05:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-12-02 21:05:03,739 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-12-02 21:05:03,740 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:03,740 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-12-02 21:05:03,741 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:03,741 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-12-02 21:05:03,741 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:03,741 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-12-02 21:05:03,744 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 21:05:03,748 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-12-02 21:05:03,748 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-12-02 21:05:03,748 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-12-02 21:05:03,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-12-02 21:05:03,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 21:05:03,750 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-12-02 21:05:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-12-02 21:05:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-12-02 21:05:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-02 21:05:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-12-02 21:05:03,769 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-02 21:05:03,769 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-02 21:05:03,769 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-02 21:05:03,769 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-12-02 21:05:03,769 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 21:05:03,769 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 21:05:03,769 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 21:05:03,770 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 21:05:03,770 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 21:05:03,770 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-12-02 21:05:03,770 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2018-12-02 21:05:03,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:03,770 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-12-02 21:05:03,771 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:03,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:03,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:03,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 21:05:03,809 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 21:05:03,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 21:05:03,811 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 21:05:03,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:03,811 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-12-02 21:05:03,811 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:03,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:03,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:03,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 21:05:03,843 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 21:05:03,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 21:05:03,843 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-12-02 21:05:03,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 21:05:03,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 21:05:03,846 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-12-02 21:05:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 21:05:03,899 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-12-02 21:05:03,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 21:05:03,900 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-12-02 21:05:03,901 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 21:05:03,902 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-12-02 21:05:03,902 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-12-02 21:05:03,902 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-12-02 21:05:03,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-12-02 21:05:03,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 21:05:03,902 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-12-02 21:05:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-12-02 21:05:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-02 21:05:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-02 21:05:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-12-02 21:05:03,905 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-12-02 21:05:03,905 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-12-02 21:05:03,905 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-02 21:05:03,905 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-12-02 21:05:03,905 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 21:05:03,906 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 21:05:03,906 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 21:05:03,906 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 21:05:03,906 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-12-02 21:05:03,906 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-12-02 21:05:03,906 INFO L796 eck$LassoCheckResult]: Loop: 182#L11-1 call #t~ret1 := fibo(~n - 2);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume !(1 == ~n); 193#L11 call #t~ret0 := fibo(~n - 1);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume 1 == ~n;#res := 1; 199#fiboFINAL assume true; 197#fiboEXIT >#32#return; 182#L11-1 [2018-12-02 21:05:03,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-12-02 21:05:03,907 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:03,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:03,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:03,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:03,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 21:05:03,937 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:03,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:03,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:03,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 21:05:03,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-02 21:05:03,968 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 21:05:03,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-12-02 21:05:03,968 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:03,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:03,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:03,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:04,047 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 21:05:04,047 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 21:05:04,047 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 21:05:04,047 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 21:05:04,047 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 21:05:04,048 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:04,048 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 21:05:04,048 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 21:05:04,048 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration3_Loop [2018-12-02 21:05:04,048 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 21:05:04,048 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 21:05:04,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:04,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:04,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:04,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:04,093 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 21:05:04,093 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:04,095 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 21:05:04,095 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:04,112 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 21:05:04,112 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 21:05:04,597 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 21:05:04,598 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 21:05:04,598 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 21:05:04,598 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 21:05:04,598 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 21:05:04,598 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 21:05:04,598 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:04,599 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 21:05:04,599 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 21:05:04,599 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration3_Loop [2018-12-02 21:05:04,599 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 21:05:04,599 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 21:05:04,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:04,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:04,613 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:04,614 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:04,642 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 21:05:04,643 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 21:05:04,643 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 [2018-12-02 21:05:04,643 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:04,643 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:04,644 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:04,644 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:04,644 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:04,644 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:04,644 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:04,646 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 21:05:04,646 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 [2018-12-02 21:05:04,646 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:04,646 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:04,646 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:04,647 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:04,647 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:04,647 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:04,647 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:04,650 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 21:05:04,652 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 21:05:04,652 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 21:05:04,653 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 21:05:04,653 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 21:05:04,653 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 21:05:04,653 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-02 21:05:04,653 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 21:05:04,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:04,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:04,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:04,721 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 [2018-12-02 21:05:04,721 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-12-02 21:05:04,812 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. [2018-12-02 21:05:04,812 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 [2018-12-02 21:05:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-02 21:05:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-12-02 21:05:04,813 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-12-02 21:05:04,813 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:04,813 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-12-02 21:05:04,814 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:04,814 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-12-02 21:05:04,814 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:04,814 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-12-02 21:05:04,818 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-02 21:05:04,820 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-12-02 21:05:04,820 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-12-02 21:05:04,820 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-12-02 21:05:04,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-12-02 21:05:04,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 21:05:04,821 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-12-02 21:05:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-12-02 21:05:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-12-02 21:05:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-02 21:05:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-12-02 21:05:04,828 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-12-02 21:05:04,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 21:05:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 21:05:04,828 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-12-02 21:05:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 21:05:04,878 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-12-02 21:05:04,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 21:05:04,879 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-12-02 21:05:04,881 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-02 21:05:04,882 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-12-02 21:05:04,882 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-12-02 21:05:04,883 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-12-02 21:05:04,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-12-02 21:05:04,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 21:05:04,883 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-12-02 21:05:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-12-02 21:05:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-12-02 21:05:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-02 21:05:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-12-02 21:05:04,888 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-12-02 21:05:04,888 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-12-02 21:05:04,889 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-02 21:05:04,889 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-12-02 21:05:04,890 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-02 21:05:04,890 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 21:05:04,890 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 21:05:04,891 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 21:05:04,891 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-12-02 21:05:04,891 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 704#L25 call main_#t~ret2 := fibo(main_~x~0);< 726#fiboENTRY ~n := #in~n; 748#L6 assume !(~n < 1); 707#L8 assume !(1 == ~n); 708#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 720#L6 assume !(~n < 1); 752#L8 assume 1 == ~n;#res := 1; 751#fiboFINAL assume true; 750#fiboEXIT >#32#return; 710#L11-1 call #t~ret1 := fibo(~n - 2);< 749#fiboENTRY ~n := #in~n; 777#L6 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 773#fiboEXIT >#34#return; 772#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 771#fiboFINAL assume true; 759#fiboEXIT >#32#return; 760#L11-1 [2018-12-02 21:05:04,891 INFO L796 eck$LassoCheckResult]: Loop: 760#L11-1 call #t~ret1 := fibo(~n - 2);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume !(1 == ~n); 763#L11 call #t~ret0 := fibo(~n - 1);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume 1 == ~n;#res := 1; 769#fiboFINAL assume true; 770#fiboEXIT >#32#return; 760#L11-1 [2018-12-02 21:05:04,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-12-02 21:05:04,891 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:04,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:04,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:04,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:04,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-02 21:05:04,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 21:05:04,945 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 21:05:04,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:04,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-02 21:05:04,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 21:05:04,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-02 21:05:04,979 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 21:05:04,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:04,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-12-02 21:05:04,980 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:04,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:04,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:04,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:04,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:05,039 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 21:05:05,040 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 21:05:05,040 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 21:05:05,040 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 21:05:05,040 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 21:05:05,040 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:05,040 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 21:05:05,040 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 21:05:05,040 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration4_Loop [2018-12-02 21:05:05,040 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 21:05:05,040 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 21:05:05,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:05,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:05,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:05,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:05,071 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 21:05:05,072 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/z3 Starting monitored process 12 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:05,073 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 21:05:05,073 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:05,089 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 21:05:05,090 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 21:05:05,574 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 21:05:05,575 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 21:05:05,576 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 21:05:05,576 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 21:05:05,576 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 21:05:05,576 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 21:05:05,576 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:05,576 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 21:05:05,576 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 21:05:05,576 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration4_Loop [2018-12-02 21:05:05,576 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 21:05:05,576 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 21:05:05,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:05,578 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:05,579 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:05,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:05,612 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 21:05:05,612 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 21:05:05,613 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 [2018-12-02 21:05:05,613 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:05,614 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:05,614 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:05,614 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:05,614 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:05,614 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:05,614 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:05,615 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 21:05:05,615 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 [2018-12-02 21:05:05,616 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:05,616 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:05,616 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:05,616 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:05,616 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:05,617 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:05,617 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:05,618 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 21:05:05,618 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 [2018-12-02 21:05:05,618 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:05,618 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:05,619 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:05,619 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:05,619 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:05,619 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:05,619 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:05,621 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 21:05:05,621 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 [2018-12-02 21:05:05,621 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:05,622 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:05,622 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:05,622 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:05,622 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:05,623 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:05,623 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:05,626 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 21:05:05,628 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 21:05:05,628 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 21:05:05,628 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 21:05:05,628 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 21:05:05,629 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 21:05:05,629 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-02 21:05:05,629 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 21:05:05,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:05,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:05,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:05,713 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 [2018-12-02 21:05:05,713 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-12-02 21:05:05,803 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. [2018-12-02 21:05:05,804 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 [2018-12-02 21:05:05,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-02 21:05:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-12-02 21:05:05,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-12-02 21:05:05,804 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:05,804 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 21:05:05,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:05,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:05,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:05,879 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 [2018-12-02 21:05:05,880 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-12-02 21:05:05,956 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. [2018-12-02 21:05:05,956 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 [2018-12-02 21:05:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-02 21:05:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-12-02 21:05:05,957 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-12-02 21:05:05,957 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:05,957 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 21:05:05,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:05,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:06,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:06,029 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 [2018-12-02 21:05:06,029 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-12-02 21:05:06,153 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. [2018-12-02 21:05:06,153 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 [2018-12-02 21:05:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-02 21:05:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-12-02 21:05:06,154 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-12-02 21:05:06,155 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:06,155 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-12-02 21:05:06,155 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:06,155 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-12-02 21:05:06,156 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:06,156 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-12-02 21:05:06,163 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-12-02 21:05:06,168 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-12-02 21:05:06,168 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-12-02 21:05:06,168 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-12-02 21:05:06,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-12-02 21:05:06,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 21:05:06,169 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-12-02 21:05:06,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-12-02 21:05:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-12-02 21:05:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-12-02 21:05:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-12-02 21:05:06,185 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-12-02 21:05:06,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 21:05:06,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-12-02 21:05:06,185 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-12-02 21:05:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 21:05:06,307 INFO L93 Difference]: Finished difference Result 497 states and 787 transitions. [2018-12-02 21:05:06,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 21:05:06,308 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 787 transitions. [2018-12-02 21:05:06,313 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-12-02 21:05:06,319 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 784 transitions. [2018-12-02 21:05:06,319 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-12-02 21:05:06,320 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-12-02 21:05:06,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 784 transitions. [2018-12-02 21:05:06,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 21:05:06,320 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 784 transitions. [2018-12-02 21:05:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 784 transitions. [2018-12-02 21:05:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 365. [2018-12-02 21:05:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2018-12-02 21:05:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 517 transitions. [2018-12-02 21:05:06,338 INFO L728 BuchiCegarLoop]: Abstraction has 365 states and 517 transitions. [2018-12-02 21:05:06,339 INFO L608 BuchiCegarLoop]: Abstraction has 365 states and 517 transitions. [2018-12-02 21:05:06,339 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-02 21:05:06,339 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 365 states and 517 transitions. [2018-12-02 21:05:06,340 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-12-02 21:05:06,340 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 21:05:06,341 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 21:05:06,341 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-12-02 21:05:06,341 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 21:05:06,341 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3586#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3597#L8 assume !(1 == ~n); 3592#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3594#L6 assume !(~n < 1); 3595#L8 assume !(1 == ~n); 3555#L11 call #t~ret0 := fibo(~n - 1);< 3589#fiboENTRY ~n := #in~n; 3591#L6 assume !(~n < 1); 3593#L8 assume !(1 == ~n); 3554#L11 call #t~ret0 := fibo(~n - 1);< 3589#fiboENTRY ~n := #in~n; 3590#L6 assume !(~n < 1); 3553#L8 assume 1 == ~n;#res := 1; 3556#fiboFINAL assume true; 3672#fiboEXIT >#32#return; 3617#L11-1 call #t~ret1 := fibo(~n - 2);< 3618#fiboENTRY ~n := #in~n; 3739#L6 assume !(~n < 1); 3736#L8 assume !(1 == ~n); 3737#L11 call #t~ret0 := fibo(~n - 1);< 3749#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3863#L8 assume !(1 == ~n); 3666#L11 call #t~ret0 := fibo(~n - 1);< 3872#fiboENTRY [2018-12-02 21:05:06,341 INFO L796 eck$LassoCheckResult]: Loop: 3872#fiboENTRY ~n := #in~n; 3879#L6 assume !(~n < 1); 3878#L8 assume !(1 == ~n); 3667#L11 call #t~ret0 := fibo(~n - 1);< 3872#fiboENTRY [2018-12-02 21:05:06,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:06,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-12-02 21:05:06,342 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:06,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:06,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:06,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 21:05:06,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 21:05:06,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 21:05:06,416 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 21:05:06,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:06,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 21:05:06,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 21:05:06,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-12-02 21:05:06,514 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 21:05:06,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-12-02 21:05:06,514 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 21:05:06,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 21:05:06,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:06,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:05:06,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:05:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 21:05:06,542 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 21:05:06,543 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 21:05:06,543 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 21:05:06,543 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 21:05:06,543 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 21:05:06,543 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:06,543 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 21:05:06,543 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 21:05:06,543 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration5_Loop [2018-12-02 21:05:06,543 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 21:05:06,543 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 21:05:06,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,563 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 21:05:06,564 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/bin-2019/uautomizer/z3 Starting monitored process 15 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:06,565 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 21:05:06,566 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 21:05:06,568 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 21:05:06,568 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:06,584 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 21:05:06,584 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4eab6828-c318-44ff-aa80-da6207a5ec94/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 [2018-12-02 21:05:06,601 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 21:05:06,601 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 21:05:06,616 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 21:05:06,617 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 21:05:06,617 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 21:05:06,617 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 21:05:06,617 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 21:05:06,617 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 21:05:06,617 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 21:05:06,617 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 21:05:06,617 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 21:05:06,618 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration5_Loop [2018-12-02 21:05:06,618 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 21:05:06,618 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 21:05:06,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 21:05:06,644 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 21:05:06,644 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 21:05:06,645 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 [2018-12-02 21:05:06,645 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 21:05:06,645 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 21:05:06,645 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 21:05:06,645 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 21:05:06,645 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 21:05:06,645 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 21:05:06,646 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 21:05:06,647 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 21:05:06,648 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 21:05:06,648 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 21:05:06,648 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 21:05:06,648 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 21:05:06,648 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 21:05:06,648 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-12-02 21:05:06,648 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 21:05:06,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:06,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:06,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:06,708 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 [2018-12-02 21:05:06,708 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-12-02 21:05:06,755 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 375 states and 527 transitions. Complement of second has 13 states. [2018-12-02 21:05:06,756 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 [2018-12-02 21:05:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 21:05:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-12-02 21:05:06,756 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-12-02 21:05:06,757 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:06,757 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 21:05:06,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:06,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:06,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:06,817 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 [2018-12-02 21:05:06,817 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-12-02 21:05:06,856 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 375 states and 527 transitions. Complement of second has 13 states. [2018-12-02 21:05:06,857 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 [2018-12-02 21:05:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 21:05:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-12-02 21:05:06,857 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-12-02 21:05:06,857 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:06,857 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 21:05:06,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:05:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:06,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:05:06,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:05:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 21:05:06,911 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 [2018-12-02 21:05:06,911 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-12-02 21:05:06,958 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 492 states and 654 transitions. Complement of second has 14 states. [2018-12-02 21:05:06,959 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 [2018-12-02 21:05:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 21:05:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-12-02 21:05:06,960 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-12-02 21:05:06,960 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:06,960 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-12-02 21:05:06,960 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:06,961 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-12-02 21:05:06,961 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 21:05:06,961 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 492 states and 654 transitions. [2018-12-02 21:05:06,966 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-12-02 21:05:06,970 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 492 states to 405 states and 565 transitions. [2018-12-02 21:05:06,970 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2018-12-02 21:05:06,971 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 160 [2018-12-02 21:05:06,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 405 states and 565 transitions. [2018-12-02 21:05:06,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 21:05:06,971 INFO L705 BuchiCegarLoop]: Abstraction has 405 states and 565 transitions. [2018-12-02 21:05:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states and 565 transitions. [2018-12-02 21:05:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 389. [2018-12-02 21:05:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-12-02 21:05:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 541 transitions. [2018-12-02 21:05:06,984 INFO L728 BuchiCegarLoop]: Abstraction has 389 states and 541 transitions. [2018-12-02 21:05:06,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-02 21:05:06,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-12-02 21:05:06,985 INFO L87 Difference]: Start difference. First operand 389 states and 541 transitions. Second operand 20 states. [2018-12-02 21:05:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 21:05:07,218 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2018-12-02 21:05:07,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 21:05:07,218 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 169 states and 208 transitions. [2018-12-02 21:05:07,219 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-02 21:05:07,219 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 169 states to 0 states and 0 transitions. [2018-12-02 21:05:07,219 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-02 21:05:07,219 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-02 21:05:07,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-02 21:05:07,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-02 21:05:07,220 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 21:05:07,220 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 21:05:07,220 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 21:05:07,220 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-02 21:05:07,220 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-02 21:05:07,220 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-02 21:05:07,220 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-02 21:05:07,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 02.12 09:05:07 BoogieIcfgContainer [2018-12-02 21:05:07,224 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-02 21:05:07,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 21:05:07,224 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 21:05:07,225 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 21:05:07,225 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:05:03" (3/4) ... [2018-12-02 21:05:07,227 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 21:05:07,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 21:05:07,228 INFO L168 Benchmark]: Toolchain (without parser) took 4347.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 211.8 MB). Free memory was 957.1 MB in the beginning and 776.5 MB in the end (delta: 180.6 MB). Peak memory consumption was 392.4 MB. Max. memory is 11.5 GB. [2018-12-02 21:05:07,229 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 21:05:07,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.08 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 21:05:07,229 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.68 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 21:05:07,230 INFO L168 Benchmark]: Boogie Preprocessor took 8.90 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 21:05:07,230 INFO L168 Benchmark]: RCFGBuilder took 135.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -162.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2018-12-02 21:05:07,230 INFO L168 Benchmark]: BuchiAutomizer took 4062.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 86.0 MB). Free memory was 1.1 GB in the beginning and 776.5 MB in the end (delta: 327.0 MB). Peak memory consumption was 413.0 MB. Max. memory is 11.5 GB. [2018-12-02 21:05:07,231 INFO L168 Benchmark]: Witness Printer took 3.13 ms. Allocated memory is still 1.2 GB. Free memory is still 776.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 21:05:07,233 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 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 117.08 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 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 17.68 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 8.90 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 135.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -162.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4062.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 86.0 MB). Free memory was 1.1 GB in the beginning and 776.5 MB in the end (delta: 327.0 MB). Peak memory consumption was 413.0 MB. Max. memory is 11.5 GB. * Witness Printer took 3.13 ms. Allocated memory is still 1.2 GB. Free memory is still 776.5 MB. 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 8 terminating modules (4 trivial, 2 deterministic, 2 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. 4 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.0s and 6 iterations. TraceHistogramMax:6. Analysis of lassos took 2.2s. Construction of modules took 0.3s. Büchi inclusion checks took 1.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 254 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 365 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 149 SDtfs, 379 SDslu, 185 SDs, 0 SdLazy, 716 SolverSat, 197 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp90 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq189 hnf92 smp84 dnf100 smp100 tf110 neg97 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 5ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...