./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/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 1ca069cb8d4103e8fb4700634948424bd87542bc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 09:33:23,812 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 09:33:23,813 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 09:33:23,822 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 09:33:23,823 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 09:33:23,823 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 09:33:23,824 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 09:33:23,826 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 09:33:23,827 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 09:33:23,827 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 09:33:23,828 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 09:33:23,828 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 09:33:23,829 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 09:33:23,830 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 09:33:23,831 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 09:33:23,832 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 09:33:23,832 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 09:33:23,834 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 09:33:23,836 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 09:33:23,837 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 09:33:23,838 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 09:33:23,839 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 09:33:23,841 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 09:33:23,841 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 09:33:23,841 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 09:33:23,842 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 09:33:23,842 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 09:33:23,844 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 09:33:23,844 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 09:33:23,845 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 09:33:23,845 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 09:33:23,846 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 09:33:23,846 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 09:33:23,846 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 09:33:23,848 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 09:33:23,849 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 09:33:23,849 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-23 09:33:23,860 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 09:33:23,861 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 09:33:23,861 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 09:33:23,862 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 09:33:23,862 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 09:33:23,862 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 09:33:23,862 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 09:33:23,862 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 09:33:23,862 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 09:33:23,863 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 09:33:23,864 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 09:33:23,864 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 09:33:23,864 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 09:33:23,864 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 09:33:23,864 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 09:33:23,864 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 09:33:23,864 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 09:33:23,865 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 09:33:23,865 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 09:33:23,865 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 09:33:23,865 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 09:33:23,865 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 09:33:23,865 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 09:33:23,865 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 09:33:23,866 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 09:33:23,866 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 09:33:23,866 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 09:33:23,866 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 09:33:23,866 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 09:33:23,866 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 09:33:23,866 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 09:33:23,869 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 09:33:23,869 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_a5c004b1-62b1-40de-81ce-549a97692aff/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 -> 1ca069cb8d4103e8fb4700634948424bd87542bc [2018-11-23 09:33:23,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 09:33:23,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 09:33:23,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 09:33:23,905 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 09:33:23,905 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 09:33:23,906 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10_false-unreach-call_true-termination.c [2018-11-23 09:33:23,946 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/data/8f5864365/b625cca66ae24f73a6f8f2de23305cc2/FLAG16f445b28 [2018-11-23 09:33:24,278 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 09:33:24,279 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/sv-benchmarks/c/recursive-simple/fibo_10_false-unreach-call_true-termination.c [2018-11-23 09:33:24,283 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/data/8f5864365/b625cca66ae24f73a6f8f2de23305cc2/FLAG16f445b28 [2018-11-23 09:33:24,709 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/data/8f5864365/b625cca66ae24f73a6f8f2de23305cc2 [2018-11-23 09:33:24,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 09:33:24,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 09:33:24,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 09:33:24,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 09:33:24,716 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 09:33:24,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3436f9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24, skipping insertion in model container [2018-11-23 09:33:24,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 09:33:24,736 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 09:33:24,838 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 09:33:24,840 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 09:33:24,849 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 09:33:24,857 INFO L195 MainTranslator]: Completed translation [2018-11-23 09:33:24,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24 WrapperNode [2018-11-23 09:33:24,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 09:33:24,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 09:33:24,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 09:33:24,859 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 09:33:24,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 09:33:24,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 09:33:24,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 09:33:24,879 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 09:33:24,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... [2018-11-23 09:33:24,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 09:33:24,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 09:33:24,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 09:33:24,892 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 09:33:24,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 09:33:24,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 09:33:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-23 09:33:24,979 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-23 09:33:25,089 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 09:33:25,089 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-23 09:33:25,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:33:25 BoogieIcfgContainer [2018-11-23 09:33:25,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 09:33:25,090 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 09:33:25,090 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 09:33:25,094 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 09:33:25,095 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 09:33:25,095 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 09:33:24" (1/3) ... [2018-11-23 09:33:25,096 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@15358cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 09:33:25, skipping insertion in model container [2018-11-23 09:33:25,096 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 09:33:25,097 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:33:24" (2/3) ... [2018-11-23 09:33:25,097 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@15358cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 09:33:25, skipping insertion in model container [2018-11-23 09:33:25,097 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 09:33:25,097 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:33:25" (3/3) ... [2018-11-23 09:33:25,099 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_10_false-unreach-call_true-termination.c [2018-11-23 09:33:25,154 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 09:33:25,155 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 09:33:25,155 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 09:33:25,155 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 09:33:25,156 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 09:33:25,156 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 09:33:25,156 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 09:33:25,156 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 09:33:25,156 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 09:33:25,170 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 09:33:25,195 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 09:33:25,196 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:25,196 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:25,204 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 09:33:25,204 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 09:33:25,204 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 09:33:25,204 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 09:33:25,206 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 09:33:25,206 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:25,206 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:25,206 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 09:33:25,207 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 09:33:25,215 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-11-23 09:33:25,215 INFO L796 eck$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 [2018-11-23 09:33:25,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:25,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-11-23 09:33:25,224 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:25,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:25,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:25,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:25,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:25,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-11-23 09:33:25,297 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:25,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:25,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:25,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:25,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:25,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:25,309 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-11-23 09:33:25,309 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:25,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:25,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:25,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:25,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:25,400 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:25,401 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:25,401 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:25,402 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:25,402 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 09:33:25,402 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:25,402 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:25,402 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:25,402 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 09:33:25,402 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:25,403 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:25,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,512 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:25,513 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:25,523 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:25,524 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:25,529 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 09:33:25,529 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_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:25,545 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:25,545 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:25,547 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 09:33:25,547 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_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:25,563 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:25,563 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:25,566 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 09:33:25,566 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_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:25,582 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:25,582 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:25,584 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 09:33:25,585 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_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:25,600 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:25,601 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:25,620 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 09:33:25,620 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:25,639 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 09:33:25,640 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:25,641 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:25,641 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:25,641 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:25,641 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 09:33:25,641 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:25,641 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:25,641 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:25,641 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 09:33:25,641 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:25,641 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:25,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,644 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:25,746 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:25,753 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 09:33:25,755 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:25,756 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:25,757 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:25,757 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:25,757 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:25,757 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:25,759 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:25,760 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:25,763 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:25,764 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:25,764 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:25,764 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:25,765 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:25,765 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:25,765 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:25,765 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:25,765 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:25,766 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:25,767 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:25,767 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:25,767 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:25,767 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:25,768 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:25,768 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:25,768 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:25,768 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:25,769 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:25,770 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:25,770 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:25,770 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:25,770 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:25,770 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:25,770 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:25,771 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:25,771 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:25,772 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:25,772 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:25,773 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:25,773 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:25,773 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:25,773 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:25,773 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:25,774 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:25,774 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:25,779 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 09:33:25,783 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 09:33:25,783 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 09:33:25,785 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 09:33:25,785 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 09:33:25,786 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 09:33:25,786 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 09:33:25,787 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 09:33:25,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:25,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:25,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:25,891 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-23 09:33:25,892 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-11-23 09:33:25,984 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. [2018-11-23 09:33:25,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 09:33:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-23 09:33:25,989 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-11-23 09:33:25,990 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:25,990 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-11-23 09:33:25,991 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:25,991 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-23 09:33:25,991 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:25,992 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-11-23 09:33:25,996 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 09:33:26,001 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-11-23 09:33:26,002 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-23 09:33:26,002 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-23 09:33:26,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-11-23 09:33:26,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:26,004 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-11-23 09:33:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-11-23 09:33:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-11-23 09:33:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 09:33:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-11-23 09:33:26,024 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 09:33:26,024 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 09:33:26,024 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 09:33:26,024 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-11-23 09:33:26,025 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 09:33:26,025 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:26,025 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:26,026 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:33:26,026 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:33:26,026 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-11-23 09:33:26,026 INFO L796 eck$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 [2018-11-23 09:33:26,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:26,026 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-11-23 09:33:26,026 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:26,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:26,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:26,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:26,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 09:33:26,112 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 09:33:26,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 09:33:26,115 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 09:33:26,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:26,115 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-11-23 09:33:26,115 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:26,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:26,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:26,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:26,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 09:33:26,164 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 09:33:26,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 09:33:26,164 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 09:33:26,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 09:33:26,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 09:33:26,168 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-23 09:33:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:33:26,237 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-11-23 09:33:26,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 09:33:26,238 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-11-23 09:33:26,240 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 09:33:26,241 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-11-23 09:33:26,241 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-11-23 09:33:26,241 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-11-23 09:33:26,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-11-23 09:33:26,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:26,242 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 09:33:26,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-11-23 09:33:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-23 09:33:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 09:33:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-11-23 09:33:26,246 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 09:33:26,246 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 09:33:26,246 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 09:33:26,246 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-11-23 09:33:26,247 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 09:33:26,247 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:26,251 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:26,252 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:33:26,252 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 09:33:26,252 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-11-23 09:33:26,253 INFO L796 eck$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 [2018-11-23 09:33:26,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-11-23 09:33:26,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:26,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:26,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:26,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:26,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:26,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:33:26,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:33:26,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:26,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:26,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:33:26,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 09:33:26,332 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 09:33:26,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-11-23 09:33:26,333 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:26,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:26,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:26,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:26,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:26,436 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:26,437 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:26,437 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:26,437 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:26,437 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 09:33:26,437 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:26,437 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:26,437 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:26,438 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 09:33:26,438 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:26,438 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:26,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:26,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:26,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:26,454 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:26,497 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:26,497 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:26,503 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:26,503 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:26,522 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 09:33:26,522 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:27,047 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 09:33:27,049 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:27,049 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:27,049 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:27,049 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:27,049 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 09:33:27,049 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:27,049 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:27,049 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:27,049 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 09:33:27,049 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:27,049 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:27,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:27,052 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:27,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:27,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:27,098 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:27,099 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 09:33:27,099 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:27,100 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:27,100 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:27,100 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:27,100 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:27,100 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:27,100 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:27,101 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:27,103 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:27,103 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:27,104 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:27,104 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:27,104 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:27,104 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:27,104 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:27,105 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:27,105 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:27,110 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 09:33:27,114 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 09:33:27,114 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 09:33:27,115 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 09:33:27,115 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 09:33:27,115 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 09:33:27,115 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 09:33:27,115 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 09:33:27,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:27,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:27,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:27,221 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-23 09:33:27,221 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-23 09:33:27,331 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2018-11-23 09:33:27,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 09:33:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 09:33:27,333 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-11-23 09:33:27,333 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:27,333 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-11-23 09:33:27,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:27,334 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-11-23 09:33:27,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:27,334 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-11-23 09:33:27,339 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 09:33:27,342 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-11-23 09:33:27,342 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-11-23 09:33:27,343 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 09:33:27,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-11-23 09:33:27,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:27,343 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-11-23 09:33:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-11-23 09:33:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-11-23 09:33:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 09:33:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-11-23 09:33:27,351 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-11-23 09:33:27,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 09:33:27,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 09:33:27,352 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-11-23 09:33:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:33:27,400 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-11-23 09:33:27,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 09:33:27,401 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-11-23 09:33:27,404 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 09:33:27,407 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-11-23 09:33:27,407 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-11-23 09:33:27,407 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 09:33:27,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-11-23 09:33:27,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:27,408 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-11-23 09:33:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-11-23 09:33:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-11-23 09:33:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 09:33:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-11-23 09:33:27,417 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 09:33:27,417 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 09:33:27,417 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 09:33:27,417 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-11-23 09:33:27,418 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 09:33:27,419 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:27,419 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:27,419 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 09:33:27,419 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 09:33:27,420 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 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 [2018-11-23 09:33:27,420 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 [2018-11-23 09:33:27,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-11-23 09:33:27,420 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:27,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:27,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:27,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:27,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 09:33:27,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:33:27,481 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/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 [2018-11-23 09:33:27,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:27,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 09:33:27,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:33:27,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 09:33:27,521 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 09:33:27,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-11-23 09:33:27,521 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:27,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:27,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:27,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:27,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:27,589 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:27,590 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:27,590 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:27,590 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:27,590 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 09:33:27,590 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:27,590 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:27,590 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:27,590 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 09:33:27,590 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:27,590 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:27,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:27,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:27,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:27,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:27,624 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:27,624 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/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 [2018-11-23 09:33:27,626 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:27,626 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:27,647 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 09:33:27,647 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:28,190 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 09:33:28,192 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:28,192 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:28,192 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:28,192 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:28,192 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 09:33:28,192 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:28,192 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:28,192 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:28,192 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 09:33:28,192 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:28,193 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:28,193 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:28,195 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:28,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:28,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:28,240 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:28,240 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 09:33:28,241 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:28,241 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:28,241 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:28,242 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:28,242 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:28,242 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:28,242 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:28,242 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:28,243 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:28,243 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:28,244 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:28,244 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:28,244 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:28,244 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:28,244 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:28,245 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:28,245 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:28,246 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:28,246 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:28,246 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:28,247 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:28,247 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:28,247 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:28,247 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:28,247 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:28,247 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:28,249 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:28,249 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:28,250 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:28,250 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:28,250 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:28,250 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:28,250 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:28,250 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:28,250 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:28,253 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 09:33:28,255 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 09:33:28,255 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 09:33:28,256 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 09:33:28,256 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 09:33:28,256 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 09:33:28,256 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 09:33:28,256 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 09:33:28,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:28,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:28,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:28,345 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-23 09:33:28,345 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 09:33:28,437 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 162 states and 216 transitions. Complement of second has 25 states. [2018-11-23 09:33:28,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 09:33:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 09:33:28,443 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 09:33:28,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:28,444 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:28,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:28,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:28,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:28,553 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-23 09:33:28,553 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 09:33:28,649 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 287 states and 386 transitions. Complement of second has 25 states. [2018-11-23 09:33:28,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 09:33:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-11-23 09:33:28,652 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 09:33:28,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:28,652 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:28,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:28,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:28,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:28,741 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-23 09:33:28,741 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 09:33:28,877 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 825 states and 1090 transitions. Complement of second has 112 states. [2018-11-23 09:33:28,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 09:33:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-11-23 09:33:28,880 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 09:33:28,880 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:28,880 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-11-23 09:33:28,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:28,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-11-23 09:33:28,882 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:28,882 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-11-23 09:33:28,894 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 09:33:28,904 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-11-23 09:33:28,904 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-23 09:33:28,905 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-11-23 09:33:28,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-11-23 09:33:28,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:28,906 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-11-23 09:33:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-11-23 09:33:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-11-23 09:33:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-23 09:33:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-11-23 09:33:28,933 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-11-23 09:33:28,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 09:33:28,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 09:33:28,934 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-11-23 09:33:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:33:29,090 INFO L93 Difference]: Finished difference Result 497 states and 785 transitions. [2018-11-23 09:33:29,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 09:33:29,093 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 785 transitions. [2018-11-23 09:33:29,101 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 09:33:29,109 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 782 transitions. [2018-11-23 09:33:29,110 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-11-23 09:33:29,110 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-23 09:33:29,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 782 transitions. [2018-11-23 09:33:29,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:29,111 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 782 transitions. [2018-11-23 09:33:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 782 transitions. [2018-11-23 09:33:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 369. [2018-11-23 09:33:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-11-23 09:33:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 522 transitions. [2018-11-23 09:33:29,135 INFO L728 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-23 09:33:29,135 INFO L608 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-23 09:33:29,135 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 09:33:29,136 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 522 transitions. [2018-11-23 09:33:29,138 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 09:33:29,138 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:29,138 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:29,139 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-23 09:33:29,139 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 09:33:29,139 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3588#fiboENTRY ~n := #in~n; 3605#L6 assume !(~n < 1); 3604#L8 assume !(1 == ~n); 3599#L11 call #t~ret0 := fibo(~n - 1);< 3603#fiboENTRY ~n := #in~n; 3601#L6 assume !(~n < 1); 3602#L8 assume !(1 == ~n); 3557#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3600#L8 assume !(1 == ~n); 3556#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3597#L6 assume !(~n < 1); 3555#L8 assume 1 == ~n;#res := 1; 3558#fiboFINAL assume true; 3677#fiboEXIT >#32#return; 3622#L11-1 call #t~ret1 := fibo(~n - 2);< 3623#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3660#L8 assume !(1 == ~n); 3662#L11 call #t~ret0 := fibo(~n - 1);< 3873#fiboENTRY ~n := #in~n; 3888#L6 assume !(~n < 1); 3886#L8 assume !(1 == ~n); 3594#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-11-23 09:33:29,139 INFO L796 eck$LassoCheckResult]: Loop: 3591#fiboENTRY ~n := #in~n; 3595#L6 assume !(~n < 1); 3615#L8 assume !(1 == ~n); 3592#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-11-23 09:33:29,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:29,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-11-23 09:33:29,140 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:29,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:29,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:29,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:33:29,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-23 09:33:29,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:33:29,203 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/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 [2018-11-23 09:33:29,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:29,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 09:33:29,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:33:29,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-23 09:33:29,328 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 09:33:29,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:29,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-11-23 09:33:29,328 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:29,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:29,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:29,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 09:33:29,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:29,353 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:29,354 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:29,354 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:29,354 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:29,354 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 09:33:29,354 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:29,354 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:29,354 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:29,354 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 09:33:29,354 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:29,354 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:29,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,357 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,361 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,380 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:29,380 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/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 [2018-11-23 09:33:29,382 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:29,382 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:29,387 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 09:33:29,388 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_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:29,403 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:29,403 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:29,421 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 09:33:29,421 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:29,437 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 09:33:29,439 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:29,439 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:29,439 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:29,439 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:29,439 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 09:33:29,439 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:29,439 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:29,439 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:29,440 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 09:33:29,440 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:29,440 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:29,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,454 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:29,491 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:29,491 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 09:33:29,491 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:29,492 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:29,492 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:29,492 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:29,492 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:29,492 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:29,492 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:29,492 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:29,494 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 09:33:29,500 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 09:33:29,500 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 09:33:29,500 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 09:33:29,500 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 09:33:29,500 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 09:33:29,500 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 09:33:29,501 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 09:33:29,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:29,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:29,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:29,564 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 09:33:29,564 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 09:33:29,606 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-11-23 09:33:29,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 09:33:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 09:33:29,608 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 09:33:29,608 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:29,608 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:29,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:29,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:29,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:29,688 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 09:33:29,688 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 09:33:29,729 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-11-23 09:33:29,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 09:33:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 09:33:29,731 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 09:33:29,731 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:29,731 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:29,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:29,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:29,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:29,810 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 09:33:29,810 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 09:33:29,871 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 494 states and 656 transitions. Complement of second has 14 states. [2018-11-23 09:33:29,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 09:33:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-11-23 09:33:29,873 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 09:33:29,874 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:29,874 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-11-23 09:33:29,874 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:29,874 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-11-23 09:33:29,874 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:29,875 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 494 states and 656 transitions. [2018-11-23 09:33:29,878 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 09:33:29,882 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 494 states to 407 states and 567 transitions. [2018-11-23 09:33:29,882 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-11-23 09:33:29,882 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 162 [2018-11-23 09:33:29,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 567 transitions. [2018-11-23 09:33:29,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:29,883 INFO L705 BuchiCegarLoop]: Abstraction has 407 states and 567 transitions. [2018-11-23 09:33:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states and 567 transitions. [2018-11-23 09:33:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2018-11-23 09:33:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-11-23 09:33:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 546 transitions. [2018-11-23 09:33:29,895 INFO L728 BuchiCegarLoop]: Abstraction has 393 states and 546 transitions. [2018-11-23 09:33:29,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 09:33:29,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-11-23 09:33:29,896 INFO L87 Difference]: Start difference. First operand 393 states and 546 transitions. Second operand 14 states. [2018-11-23 09:33:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:33:30,088 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2018-11-23 09:33:30,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 09:33:30,089 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 274 states and 348 transitions. [2018-11-23 09:33:30,091 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:30,092 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 274 states to 244 states and 313 transitions. [2018-11-23 09:33:30,093 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 119 [2018-11-23 09:33:30,093 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-11-23 09:33:30,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 244 states and 313 transitions. [2018-11-23 09:33:30,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:30,093 INFO L705 BuchiCegarLoop]: Abstraction has 244 states and 313 transitions. [2018-11-23 09:33:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states and 313 transitions. [2018-11-23 09:33:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 203. [2018-11-23 09:33:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-23 09:33:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-23 09:33:30,098 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 09:33:30,099 INFO L608 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 09:33:30,099 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 09:33:30,099 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 203 states and 260 transitions. [2018-11-23 09:33:30,100 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:30,100 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:30,100 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:30,101 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 09:33:30,101 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 09:33:30,101 INFO L794 eck$LassoCheckResult]: Stem: 6303#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 6304#L25 call main_#t~ret2 := fibo(main_~x~0);< 6333#fiboENTRY ~n := #in~n; 6400#L6 assume !(~n < 1); 6399#L8 assume !(1 == ~n); 6395#L11 call #t~ret0 := fibo(~n - 1);< 6398#fiboENTRY ~n := #in~n; 6397#L6 assume !(~n < 1); 6396#L8 assume !(1 == ~n); 6390#L11 call #t~ret0 := fibo(~n - 1);< 6394#fiboENTRY ~n := #in~n; 6392#L6 assume !(~n < 1); 6393#L8 assume !(1 == ~n); 6323#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6384#L6 assume !(~n < 1); 6385#L8 assume 1 == ~n;#res := 1; 6497#fiboFINAL assume true; 6496#fiboEXIT >#32#return; 6298#L11-1 call #t~ret1 := fibo(~n - 2);< 6318#fiboENTRY ~n := #in~n; 6319#L6 assume ~n < 1;#res := 0; 6499#fiboFINAL assume true; 6297#fiboEXIT >#34#return; 6299#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 6471#fiboFINAL assume true; 6470#fiboEXIT >#32#return; 6330#L11-1 call #t~ret1 := fibo(~n - 2);< 6401#fiboENTRY ~n := #in~n; 6404#L6 assume !(~n < 1); 6484#L8 assume !(1 == ~n); 6306#L11 call #t~ret0 := fibo(~n - 1);< 6327#fiboENTRY ~n := #in~n; 6380#L6 assume !(~n < 1); 6370#L8 assume !(1 == ~n); 6352#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-11-23 09:33:30,101 INFO L796 eck$LassoCheckResult]: Loop: 6350#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-11-23 09:33:30,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:30,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1642551253, now seen corresponding path program 2 times [2018-11-23 09:33:30,102 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:30,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:30,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:30,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:33:30,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-23 09:33:30,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:33:30,176 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:33:30,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 09:33:30,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 09:33:30,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:33:30,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-23 09:33:30,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:33:30,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-11-23 09:33:30,324 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 09:33:30,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2018-11-23 09:33:30,324 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:30,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:30,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:30,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:33:30,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:30,358 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:30,358 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:30,358 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:30,358 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:30,358 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 09:33:30,358 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:30,358 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:30,358 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:30,358 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration6_Loop [2018-11-23 09:33:30,358 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:30,358 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:30,359 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:30,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:30,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:30,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:30,389 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:30,389 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:30,391 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:30,391 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:30,395 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 09:33:30,395 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_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 20 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:30,411 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:30,411 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:30,430 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 09:33:30,430 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:36,432 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 09:33:36,435 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:36,435 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:36,435 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:36,435 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:36,435 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 09:33:36,435 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:36,435 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:36,435 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:36,435 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration6_Loop [2018-11-23 09:33:36,435 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:36,436 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:36,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:36,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:36,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:36,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:36,478 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:36,478 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 09:33:36,479 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:36,479 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:36,479 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:36,479 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:36,480 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:36,480 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:36,485 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:36,485 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:36,487 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 09:33:36,489 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 09:33:36,489 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 09:33:36,490 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 09:33:36,490 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 09:33:36,490 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 09:33:36,490 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 09:33:36,490 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 09:33:36,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:36,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:36,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:36,584 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:36,585 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 09:33:36,617 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 215 states and 273 transitions. Complement of second has 18 states. [2018-11-23 09:33:36,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 09:33:36,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 09:33:36,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:36,618 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:36,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:36,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:36,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:36,690 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:36,690 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 09:33:36,742 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 221 states and 279 transitions. Complement of second has 17 states. [2018-11-23 09:33:36,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 09:33:36,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 09:33:36,744 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:36,744 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:36,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:36,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:36,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:36,826 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:36,826 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 09:33:36,864 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 271 states and 343 transitions. Complement of second has 27 states. [2018-11-23 09:33:36,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 09:33:36,866 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 09:33:36,866 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:36,866 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2018-11-23 09:33:36,866 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:36,867 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 8 letters. [2018-11-23 09:33:36,867 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:36,867 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 271 states and 343 transitions. [2018-11-23 09:33:36,870 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:36,872 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 271 states to 207 states and 265 transitions. [2018-11-23 09:33:36,872 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 79 [2018-11-23 09:33:36,872 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2018-11-23 09:33:36,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 265 transitions. [2018-11-23 09:33:36,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:36,872 INFO L705 BuchiCegarLoop]: Abstraction has 207 states and 265 transitions. [2018-11-23 09:33:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states and 265 transitions. [2018-11-23 09:33:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-11-23 09:33:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-23 09:33:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-23 09:33:36,878 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 09:33:36,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 09:33:36,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-11-23 09:33:36,879 INFO L87 Difference]: Start difference. First operand 203 states and 260 transitions. Second operand 20 states. [2018-11-23 09:33:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:33:37,100 INFO L93 Difference]: Finished difference Result 341 states and 458 transitions. [2018-11-23 09:33:37,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 09:33:37,101 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 341 states and 458 transitions. [2018-11-23 09:33:37,103 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:37,105 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 341 states to 315 states and 426 transitions. [2018-11-23 09:33:37,106 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2018-11-23 09:33:37,106 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-11-23 09:33:37,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 315 states and 426 transitions. [2018-11-23 09:33:37,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:37,106 INFO L705 BuchiCegarLoop]: Abstraction has 315 states and 426 transitions. [2018-11-23 09:33:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states and 426 transitions. [2018-11-23 09:33:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 282. [2018-11-23 09:33:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-11-23 09:33:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 383 transitions. [2018-11-23 09:33:37,113 INFO L728 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-11-23 09:33:37,113 INFO L608 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-11-23 09:33:37,113 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-23 09:33:37,113 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 282 states and 383 transitions. [2018-11-23 09:33:37,114 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:37,114 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:37,115 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:37,116 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2018-11-23 09:33:37,116 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 09:33:37,116 INFO L794 eck$LassoCheckResult]: Stem: 8505#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 8506#L25 call main_#t~ret2 := fibo(main_~x~0);< 8545#fiboENTRY ~n := #in~n; 8605#L6 assume !(~n < 1); 8603#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8601#fiboENTRY ~n := #in~n; 8616#L6 assume !(~n < 1); 8614#L8 assume !(1 == ~n); 8610#L11 call #t~ret0 := fibo(~n - 1);< 8613#fiboENTRY ~n := #in~n; 8668#L6 assume !(~n < 1); 8665#L8 assume !(1 == ~n); 8607#L11 call #t~ret0 := fibo(~n - 1);< 8611#fiboENTRY ~n := #in~n; 8629#L6 assume !(~n < 1); 8626#L8 assume !(1 == ~n); 8532#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8725#L6 assume !(~n < 1); 8723#L8 assume !(1 == ~n); 8533#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8725#L6 assume !(~n < 1); 8723#L8 assume !(1 == ~n); 8533#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8725#L6 assume !(~n < 1); 8723#L8 assume !(1 == ~n); 8533#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8727#L6 assume !(~n < 1); 8772#L8 assume 1 == ~n;#res := 1; 8771#fiboFINAL assume true; 8770#fiboEXIT >#32#return; 8531#L11-1 call #t~ret1 := fibo(~n - 2);< 8534#fiboENTRY ~n := #in~n; 8766#L6 assume ~n < 1;#res := 0; 8765#fiboFINAL assume true; 8760#fiboEXIT >#34#return; 8758#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 8756#fiboFINAL assume true; 8750#fiboEXIT >#32#return; 8740#L11-1 call #t~ret1 := fibo(~n - 2);< 8743#fiboENTRY ~n := #in~n; 8769#L6 assume !(~n < 1); 8768#L8 assume 1 == ~n;#res := 1; 8550#fiboFINAL assume true; 8739#fiboEXIT >#34#return; 8737#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 8735#fiboFINAL assume true; 8733#fiboEXIT >#32#return; 8549#L11-1 call #t~ret1 := fibo(~n - 2);< 8621#fiboENTRY ~n := #in~n; 8557#L6 assume !(~n < 1); 8546#L8 assume !(1 == ~n); 8496#L11 call #t~ret0 := fibo(~n - 1);< 8528#fiboENTRY ~n := #in~n; 8529#L6 assume !(~n < 1); 8513#L8 assume !(1 == ~n); 8514#L11 call #t~ret0 := fibo(~n - 1);< 8562#fiboENTRY ~n := #in~n; 8580#L6 assume !(~n < 1); 8579#L8 assume !(1 == ~n); 8560#L11 [2018-11-23 09:33:37,116 INFO L796 eck$LassoCheckResult]: Loop: 8560#L11 call #t~ret0 := fibo(~n - 1);< 8562#fiboENTRY ~n := #in~n; 8580#L6 assume !(~n < 1); 8579#L8 assume !(1 == ~n); 8560#L11 [2018-11-23 09:33:37,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash 973756610, now seen corresponding path program 3 times [2018-11-23 09:33:37,116 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:37,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:37,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:33:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-11-23 09:33:37,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:33:37,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:33:37,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 09:33:37,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-23 09:33:37,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:33:37,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-11-23 09:33:37,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:33:37,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-23 09:33:37,242 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 09:33:37,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:37,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2018-11-23 09:33:37,242 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:37,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:37,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:37,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:33:37,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:37,272 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:37,272 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:37,273 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:37,273 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:37,273 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 09:33:37,273 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:37,273 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:37,273 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:37,273 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-23 09:33:37,273 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:37,273 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:37,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:37,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:37,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:37,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:37,310 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:37,310 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 23 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:37,312 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:37,312 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:37,315 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 09:33:37,315 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_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:37,331 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:37,332 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:37,351 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 09:33:37,351 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:38,189 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 09:33:38,191 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:38,191 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:38,191 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:38,191 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:38,191 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 09:33:38,191 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:38,191 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:38,191 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:38,191 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-23 09:33:38,191 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:38,191 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:38,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:38,193 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:38,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:38,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:38,226 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:38,226 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 09:33:38,226 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:38,227 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:38,227 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:38,227 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:38,227 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:38,227 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:38,228 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:38,228 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:38,228 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:38,229 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:38,229 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:38,229 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:38,229 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:38,230 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:38,230 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:38,230 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:38,230 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:38,232 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 09:33:38,233 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 09:33:38,234 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 09:33:38,234 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 09:33:38,234 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 09:33:38,234 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 09:33:38,234 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 09:33:38,235 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 09:33:38,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:38,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:38,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:38,352 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:38,352 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-11-23 09:33:38,386 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 297 states and 399 transitions. Complement of second has 18 states. [2018-11-23 09:33:38,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 09:33:38,387 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 09:33:38,388 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:38,388 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:38,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:38,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:38,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:38,499 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:38,499 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-11-23 09:33:38,552 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 303 states and 405 transitions. Complement of second has 17 states. [2018-11-23 09:33:38,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 09:33:38,553 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 09:33:38,553 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:38,553 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:38,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:38,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:38,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:38,670 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:38,670 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-11-23 09:33:38,704 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 361 states and 481 transitions. Complement of second has 27 states. [2018-11-23 09:33:38,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 09:33:38,706 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 09:33:38,706 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:38,706 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 4 letters. [2018-11-23 09:33:38,707 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:38,707 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 8 letters. [2018-11-23 09:33:38,707 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:38,708 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 361 states and 481 transitions. [2018-11-23 09:33:38,710 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:38,717 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 361 states to 286 states and 388 transitions. [2018-11-23 09:33:38,717 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2018-11-23 09:33:38,717 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 128 [2018-11-23 09:33:38,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 286 states and 388 transitions. [2018-11-23 09:33:38,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:38,718 INFO L705 BuchiCegarLoop]: Abstraction has 286 states and 388 transitions. [2018-11-23 09:33:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states and 388 transitions. [2018-11-23 09:33:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2018-11-23 09:33:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-11-23 09:33:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 383 transitions. [2018-11-23 09:33:38,725 INFO L728 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-11-23 09:33:38,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 09:33:38,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-23 09:33:38,726 INFO L87 Difference]: Start difference. First operand 282 states and 383 transitions. Second operand 11 states. [2018-11-23 09:33:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:33:38,892 INFO L93 Difference]: Finished difference Result 399 states and 573 transitions. [2018-11-23 09:33:38,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 09:33:38,893 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 399 states and 573 transitions. [2018-11-23 09:33:38,897 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:38,902 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 399 states to 377 states and 547 transitions. [2018-11-23 09:33:38,902 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 180 [2018-11-23 09:33:38,902 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 192 [2018-11-23 09:33:38,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 377 states and 547 transitions. [2018-11-23 09:33:38,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:38,902 INFO L705 BuchiCegarLoop]: Abstraction has 377 states and 547 transitions. [2018-11-23 09:33:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states and 547 transitions. [2018-11-23 09:33:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 320. [2018-11-23 09:33:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-11-23 09:33:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 462 transitions. [2018-11-23 09:33:38,912 INFO L728 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-11-23 09:33:38,913 INFO L608 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-11-23 09:33:38,913 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-23 09:33:38,913 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 320 states and 462 transitions. [2018-11-23 09:33:38,914 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:38,915 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:38,915 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:38,916 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [17, 15, 12, 11, 9, 5, 5, 4, 4, 3, 2, 1, 1] [2018-11-23 09:33:38,916 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 09:33:38,916 INFO L794 eck$LassoCheckResult]: Stem: 11350#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 11351#L25 call main_#t~ret2 := fibo(main_~x~0);< 11382#fiboENTRY ~n := #in~n; 11469#L6 assume !(~n < 1); 11467#L8 assume !(1 == ~n); 11464#L11 call #t~ret0 := fibo(~n - 1);< 11465#fiboENTRY ~n := #in~n; 11479#L6 assume !(~n < 1); 11477#L8 assume !(1 == ~n); 11474#L11 call #t~ret0 := fibo(~n - 1);< 11475#fiboENTRY ~n := #in~n; 11485#L6 assume !(~n < 1); 11484#L8 assume !(1 == ~n); 11471#L11 call #t~ret0 := fibo(~n - 1);< 11483#fiboENTRY ~n := #in~n; 11492#L6 assume !(~n < 1); 11489#L8 assume !(1 == ~n); 11411#L11 call #t~ret0 := fibo(~n - 1);< 11487#fiboENTRY ~n := #in~n; 11493#L6 assume !(~n < 1); 11490#L8 assume !(1 == ~n); 11410#L11 call #t~ret0 := fibo(~n - 1);< 11487#fiboENTRY ~n := #in~n; 11493#L6 assume !(~n < 1); 11490#L8 assume !(1 == ~n); 11410#L11 call #t~ret0 := fibo(~n - 1);< 11487#fiboENTRY ~n := #in~n; 11493#L6 assume !(~n < 1); 11490#L8 assume !(1 == ~n); 11410#L11 call #t~ret0 := fibo(~n - 1);< 11487#fiboENTRY ~n := #in~n; 11493#L6 assume !(~n < 1); 11490#L8 assume !(1 == ~n); 11410#L11 call #t~ret0 := fibo(~n - 1);< 11487#fiboENTRY ~n := #in~n; 11496#L6 assume !(~n < 1); 11602#L8 assume 1 == ~n;#res := 1; 11601#fiboFINAL assume true; 11600#fiboEXIT >#32#return; 11598#L11-1 call #t~ret1 := fibo(~n - 2);< 11599#fiboENTRY ~n := #in~n; 11604#L6 assume ~n < 1;#res := 0; 11603#fiboFINAL assume true; 11597#fiboEXIT >#34#return; 11594#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 11593#fiboFINAL assume true; 11592#fiboEXIT >#32#return; 11580#L11-1 call #t~ret1 := fibo(~n - 2);< 11583#fiboENTRY ~n := #in~n; 11610#L6 assume !(~n < 1); 11609#L8 assume 1 == ~n;#res := 1; 11495#fiboFINAL assume true; 11579#fiboEXIT >#34#return; 11573#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 11569#fiboFINAL assume true; 11563#fiboEXIT >#32#return; 11564#L11-1 call #t~ret1 := fibo(~n - 2);< 11567#fiboENTRY ~n := #in~n; 11611#L6 assume !(~n < 1); 11608#L8 assume !(1 == ~n); 11357#L11 call #t~ret0 := fibo(~n - 1);< 11364#fiboENTRY ~n := #in~n; 11365#L6 assume !(~n < 1); 11352#L8 assume 1 == ~n;#res := 1; 11356#fiboFINAL assume true; 11661#fiboEXIT >#32#return; 11575#L11-1 call #t~ret1 := fibo(~n - 2);< 11578#fiboENTRY ~n := #in~n; 11588#L6 assume ~n < 1;#res := 0; 11586#fiboFINAL assume true; 11574#fiboEXIT >#34#return; 11577#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 11570#fiboFINAL assume true; 11565#fiboEXIT >#34#return; 11481#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 11488#fiboFINAL assume true; 11480#fiboEXIT >#32#return; 11399#L11-1 call #t~ret1 := fibo(~n - 2);< 11412#fiboENTRY ~n := #in~n; 11397#L6 assume !(~n < 1); 11401#L8 assume !(1 == ~n); 11355#L11 call #t~ret0 := fibo(~n - 1);< 11366#fiboENTRY ~n := #in~n; 11367#L6 assume !(~n < 1); 11359#L8 assume !(1 == ~n); 11360#L11 call #t~ret0 := fibo(~n - 1);< 11379#fiboENTRY ~n := #in~n; 11628#L6 assume !(~n < 1); 11625#L8 assume !(1 == ~n); 11616#L11 [2018-11-23 09:33:38,916 INFO L796 eck$LassoCheckResult]: Loop: 11616#L11 call #t~ret0 := fibo(~n - 1);< 11379#fiboENTRY ~n := #in~n; 11628#L6 assume !(~n < 1); 11625#L8 assume !(1 == ~n); 11616#L11 [2018-11-23 09:33:38,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:38,917 INFO L82 PathProgramCache]: Analyzing trace with hash -789040214, now seen corresponding path program 4 times [2018-11-23 09:33:38,917 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:38,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:38,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:38,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:33:38,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 202 proven. 76 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-11-23 09:33:39,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:33:39,018 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:33:39,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 09:33:39,052 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 09:33:39,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:33:39,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 159 proven. 267 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-11-23 09:33:39,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:33:39,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 23 [2018-11-23 09:33:39,149 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 09:33:39,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:39,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 5 times [2018-11-23 09:33:39,149 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:39,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:39,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:39,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:33:39,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:39,173 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:39,173 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:39,173 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:39,173 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:39,173 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 09:33:39,173 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:39,173 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:39,173 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:39,173 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration8_Loop [2018-11-23 09:33:39,173 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:39,173 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:39,174 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:39,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:39,176 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:39,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:39,209 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:39,209 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:39,212 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:39,212 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:39,214 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 09:33:39,214 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_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 28 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:39,231 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:39,231 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:39,234 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 09:33:39,234 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_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 29 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:39,250 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:39,250 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:39,269 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 09:33:39,269 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:39,997 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 09:33:39,999 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:39,999 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:39,999 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:39,999 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:39,999 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 09:33:39,999 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:39,999 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:39,999 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:39,999 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration8_Loop [2018-11-23 09:33:39,999 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:39,999 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:40,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:40,001 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:40,002 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:40,003 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:40,025 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:40,025 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 09:33:40,025 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:40,026 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:40,026 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:40,026 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:40,026 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:40,026 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:40,026 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:40,026 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:40,026 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:40,027 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:40,027 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:40,027 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:40,027 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:40,027 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:40,027 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:40,027 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:40,027 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:40,027 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:40,028 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:40,028 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:40,028 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:40,028 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:40,028 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:40,028 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:40,028 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:40,028 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:40,029 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 09:33:40,029 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:40,029 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:40,029 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:40,029 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:40,029 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:40,029 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:40,030 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:40,030 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:40,032 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 09:33:40,033 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 09:33:40,033 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 09:33:40,033 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 09:33:40,033 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 09:33:40,033 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 09:33:40,033 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 09:33:40,034 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 09:33:40,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:40,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:40,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:40,166 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:40,166 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146 Second operand 6 states. [2018-11-23 09:33:40,196 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146. Second operand 6 states. Result 335 states and 478 transitions. Complement of second has 18 states. [2018-11-23 09:33:40,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 09:33:40,200 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 89 letters. Loop has 4 letters. [2018-11-23 09:33:40,200 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:40,200 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:40,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:40,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:40,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:40,305 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:40,305 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146 Second operand 6 states. [2018-11-23 09:33:40,349 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146. Second operand 6 states. Result 341 states and 484 transitions. Complement of second has 17 states. [2018-11-23 09:33:40,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:40,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 09:33:40,350 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 89 letters. Loop has 4 letters. [2018-11-23 09:33:40,350 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:40,350 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:40,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:40,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:40,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:40,457 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:40,457 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146 Second operand 6 states. [2018-11-23 09:33:40,510 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146. Second operand 6 states. Result 398 states and 562 transitions. Complement of second has 27 states. [2018-11-23 09:33:40,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 09:33:40,512 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 89 letters. Loop has 4 letters. [2018-11-23 09:33:40,512 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:40,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 93 letters. Loop has 4 letters. [2018-11-23 09:33:40,513 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:40,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 89 letters. Loop has 8 letters. [2018-11-23 09:33:40,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:40,514 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 398 states and 562 transitions. [2018-11-23 09:33:40,519 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:40,522 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 398 states to 320 states and 462 transitions. [2018-11-23 09:33:40,522 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 137 [2018-11-23 09:33:40,522 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 150 [2018-11-23 09:33:40,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 320 states and 462 transitions. [2018-11-23 09:33:40,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:40,523 INFO L705 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-11-23 09:33:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states and 462 transitions. [2018-11-23 09:33:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2018-11-23 09:33:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-11-23 09:33:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 462 transitions. [2018-11-23 09:33:40,532 INFO L728 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-11-23 09:33:40,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 09:33:40,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2018-11-23 09:33:40,532 INFO L87 Difference]: Start difference. First operand 320 states and 462 transitions. Second operand 23 states. [2018-11-23 09:33:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:33:40,916 INFO L93 Difference]: Finished difference Result 561 states and 861 transitions. [2018-11-23 09:33:40,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-23 09:33:40,917 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 561 states and 861 transitions. [2018-11-23 09:33:40,922 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:40,928 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 561 states to 547 states and 842 transitions. [2018-11-23 09:33:40,928 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 260 [2018-11-23 09:33:40,928 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2018-11-23 09:33:40,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 547 states and 842 transitions. [2018-11-23 09:33:40,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:40,929 INFO L705 BuchiCegarLoop]: Abstraction has 547 states and 842 transitions. [2018-11-23 09:33:40,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states and 842 transitions. [2018-11-23 09:33:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 442. [2018-11-23 09:33:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2018-11-23 09:33:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 678 transitions. [2018-11-23 09:33:40,941 INFO L728 BuchiCegarLoop]: Abstraction has 442 states and 678 transitions. [2018-11-23 09:33:40,941 INFO L608 BuchiCegarLoop]: Abstraction has 442 states and 678 transitions. [2018-11-23 09:33:40,941 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-23 09:33:40,942 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 442 states and 678 transitions. [2018-11-23 09:33:40,945 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:40,945 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 09:33:40,945 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 09:33:40,951 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [24, 21, 16, 15, 15, 8, 8, 7, 7, 5, 3, 1, 1] [2018-11-23 09:33:40,951 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 09:33:40,951 INFO L794 eck$LassoCheckResult]: Stem: 14872#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 14873#L25 call main_#t~ret2 := fibo(main_~x~0);< 14934#fiboENTRY ~n := #in~n; 15105#L6 assume !(~n < 1); 15101#L8 assume !(1 == ~n); 15086#L11 call #t~ret0 := fibo(~n - 1);< 15091#fiboENTRY ~n := #in~n; 15089#L6 assume !(~n < 1); 15088#L8 assume !(1 == ~n); 15074#L11 call #t~ret0 := fibo(~n - 1);< 15084#fiboENTRY ~n := #in~n; 15082#L6 assume !(~n < 1); 15078#L8 assume !(1 == ~n); 15069#L11 call #t~ret0 := fibo(~n - 1);< 15073#fiboENTRY ~n := #in~n; 15071#L6 assume !(~n < 1); 15070#L8 assume !(1 == ~n); 14977#L11 call #t~ret0 := fibo(~n - 1);< 15002#fiboENTRY ~n := #in~n; 14997#L6 assume !(~n < 1); 14994#L8 assume !(1 == ~n); 14955#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14983#L6 assume !(~n < 1); 15241#L8 assume 1 == ~n;#res := 1; 15240#fiboFINAL assume true; 15237#fiboEXIT >#32#return; 15233#L11-1 call #t~ret1 := fibo(~n - 2);< 15234#fiboENTRY ~n := #in~n; 15239#L6 assume ~n < 1;#res := 0; 15236#fiboFINAL assume true; 15232#fiboEXIT >#34#return; 15230#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15228#fiboFINAL assume true; 15226#fiboEXIT >#32#return; 15059#L11-1 call #t~ret1 := fibo(~n - 2);< 15061#fiboENTRY ~n := #in~n; 15200#L6 assume !(~n < 1); 15068#L8 assume 1 == ~n;#res := 1; 14947#fiboFINAL assume true; 15058#fiboEXIT >#34#return; 15043#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15042#fiboFINAL assume true; 15027#fiboEXIT >#32#return; 15006#L11-1 call #t~ret1 := fibo(~n - 2);< 15008#fiboENTRY ~n := #in~n; 15077#L6 assume !(~n < 1); 15067#L8 assume !(1 == ~n); 15036#L11 call #t~ret0 := fibo(~n - 1);< 15220#fiboENTRY ~n := #in~n; 15219#L6 assume !(~n < 1); 15054#L8 assume 1 == ~n;#res := 1; 15050#fiboFINAL assume true; 15034#fiboEXIT >#32#return; 14903#L11-1 call #t~ret1 := fibo(~n - 2);< 14900#fiboENTRY ~n := #in~n; 14905#L6 assume ~n < 1;#res := 0; 15033#fiboFINAL assume true; 15013#fiboEXIT >#34#return; 15012#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15010#fiboFINAL assume true; 15005#fiboEXIT >#34#return; 14998#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 14974#fiboFINAL assume true; 14966#fiboEXIT >#32#return; 14946#L11-1 call #t~ret1 := fibo(~n - 2);< 14954#fiboENTRY ~n := #in~n; 14953#L6 assume !(~n < 1); 14945#L8 assume !(1 == ~n); 14948#L11 call #t~ret0 := fibo(~n - 1);< 15216#fiboENTRY ~n := #in~n; 15215#L6 assume !(~n < 1); 15212#L8 assume !(1 == ~n); 15194#L11 call #t~ret0 := fibo(~n - 1);< 15198#fiboENTRY ~n := #in~n; 15165#L6 assume !(~n < 1); 15199#L8 assume 1 == ~n;#res := 1; 15197#fiboFINAL assume true; 15193#fiboEXIT >#32#return; 15186#L11-1 call #t~ret1 := fibo(~n - 2);< 15192#fiboENTRY ~n := #in~n; 15196#L6 assume ~n < 1;#res := 0; 15150#fiboFINAL assume true; 15184#fiboEXIT >#34#return; 15189#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15225#fiboFINAL assume true; 15224#fiboEXIT >#32#return; 15057#L11-1 call #t~ret1 := fibo(~n - 2);< 15060#fiboENTRY ~n := #in~n; 15175#L6 assume !(~n < 1); 15063#L8 assume 1 == ~n;#res := 1; 15052#fiboFINAL assume true; 15056#fiboEXIT >#34#return; 15043#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15042#fiboFINAL assume true; 15027#fiboEXIT >#34#return; 14968#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15177#fiboFINAL assume true; 15028#fiboEXIT >#32#return; 14961#L11-1 call #t~ret1 := fibo(~n - 2);< 14978#fiboENTRY ~n := #in~n; 15151#L6 assume !(~n < 1); 14995#L8 assume !(1 == ~n); 14996#L11 call #t~ret0 := fibo(~n - 1);< 15039#fiboENTRY ~n := #in~n; 15221#L6 assume !(~n < 1); 15288#L8 assume !(1 == ~n); 14893#L11 call #t~ret0 := fibo(~n - 1);< 15249#fiboENTRY ~n := #in~n; 15261#L6 assume !(~n < 1); 15256#L8 assume !(1 == ~n); 14890#L11 [2018-11-23 09:33:40,951 INFO L796 eck$LassoCheckResult]: Loop: 14890#L11 call #t~ret0 := fibo(~n - 1);< 15249#fiboENTRY ~n := #in~n; 15261#L6 assume !(~n < 1); 15256#L8 assume !(1 == ~n); 14890#L11 [2018-11-23 09:33:40,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:40,952 INFO L82 PathProgramCache]: Analyzing trace with hash -235209217, now seen corresponding path program 5 times [2018-11-23 09:33:40,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:40,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:40,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:40,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:33:40,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 346 proven. 454 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-11-23 09:33:41,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 09:33:41,153 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 09:33:41,165 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 09:33:41,202 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-11-23 09:33:41,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 09:33:41,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 346 proven. 478 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-11-23 09:33:41,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 09:33:41,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2018-11-23 09:33:41,258 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 09:33:41,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:41,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 6 times [2018-11-23 09:33:41,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 09:33:41,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 09:33:41,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:41,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 09:33:41,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 09:33:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 09:33:41,290 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:41,290 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:41,290 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:41,290 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:41,290 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 09:33:41,290 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:41,290 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:41,290 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:41,290 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration9_Loop [2018-11-23 09:33:41,290 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:41,290 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:41,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:41,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:41,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:41,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:41,328 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:41,328 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 32 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:41,330 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 09:33:41,330 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5c004b1-62b1-40de-81ce-549a97692aff/bin-2019/uautomizer/z3 Starting monitored process 33 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:41,349 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 09:33:41,349 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 09:33:47,328 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 09:33:47,330 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 09:33:47,330 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 09:33:47,330 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 09:33:47,330 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 09:33:47,330 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 09:33:47,330 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 09:33:47,330 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 09:33:47,330 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 09:33:47,330 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration9_Loop [2018-11-23 09:33:47,331 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 09:33:47,331 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 09:33:47,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:47,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:47,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:47,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 09:33:47,357 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 09:33:47,357 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 09:33:47,358 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 09:33:47,358 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 09:33:47,358 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 09:33:47,358 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 09:33:47,358 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 09:33:47,358 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 09:33:47,359 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 09:33:47,359 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 09:33:47,360 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 09:33:47,361 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 09:33:47,362 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 09:33:47,362 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 09:33:47,362 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 09:33:47,362 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 09:33:47,362 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 09:33:47,362 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 09:33:47,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:47,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:47,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:47,480 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:47,481 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240 Second operand 6 states. [2018-11-23 09:33:47,508 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240. Second operand 6 states. Result 460 states and 697 transitions. Complement of second has 18 states. [2018-11-23 09:33:47,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 09:33:47,509 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 131 letters. Loop has 4 letters. [2018-11-23 09:33:47,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:47,509 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:47,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:47,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:47,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:47,633 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:47,633 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240 Second operand 6 states. [2018-11-23 09:33:47,682 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240. Second operand 6 states. Result 466 states and 703 transitions. Complement of second has 17 states. [2018-11-23 09:33:47,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 09:33:47,683 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 131 letters. Loop has 4 letters. [2018-11-23 09:33:47,683 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:47,683 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 09:33:47,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 09:33:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:47,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 09:33:47,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 09:33:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 09:33:47,804 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-23 09:33:47,805 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240 Second operand 6 states. [2018-11-23 09:33:47,845 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240. Second operand 6 states. Result 563 states and 838 transitions. Complement of second has 27 states. [2018-11-23 09:33:47,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-23 09:33:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 09:33:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 09:33:47,847 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 131 letters. Loop has 4 letters. [2018-11-23 09:33:47,847 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:47,847 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 135 letters. Loop has 4 letters. [2018-11-23 09:33:47,848 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:47,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 131 letters. Loop has 8 letters. [2018-11-23 09:33:47,848 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 09:33:47,848 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 563 states and 838 transitions. [2018-11-23 09:33:47,853 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 09:33:47,856 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 563 states to 446 states and 683 transitions. [2018-11-23 09:33:47,856 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 179 [2018-11-23 09:33:47,856 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 201 [2018-11-23 09:33:47,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 446 states and 683 transitions. [2018-11-23 09:33:47,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 09:33:47,857 INFO L705 BuchiCegarLoop]: Abstraction has 446 states and 683 transitions. [2018-11-23 09:33:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states and 683 transitions. [2018-11-23 09:33:47,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 442. [2018-11-23 09:33:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2018-11-23 09:33:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 678 transitions. [2018-11-23 09:33:47,864 INFO L728 BuchiCegarLoop]: Abstraction has 442 states and 678 transitions. [2018-11-23 09:33:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-23 09:33:47,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2018-11-23 09:33:47,865 INFO L87 Difference]: Start difference. First operand 442 states and 678 transitions. Second operand 24 states. [2018-11-23 09:33:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 09:33:48,419 INFO L93 Difference]: Finished difference Result 575 states and 804 transitions. [2018-11-23 09:33:48,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-23 09:33:48,419 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 575 states and 804 transitions. [2018-11-23 09:33:48,422 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 09:33:48,422 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 575 states to 0 states and 0 transitions. [2018-11-23 09:33:48,423 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 09:33:48,423 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 09:33:48,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 09:33:48,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 09:33:48,423 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 09:33:48,423 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 09:33:48,423 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 09:33:48,423 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-11-23 09:33:48,423 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 09:33:48,423 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 09:33:48,423 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 09:33:48,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 09:33:48 BoogieIcfgContainer [2018-11-23 09:33:48,429 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 09:33:48,429 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 09:33:48,429 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 09:33:48,430 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 09:33:48,430 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:33:25" (3/4) ... [2018-11-23 09:33:48,433 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 09:33:48,433 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 09:33:48,434 INFO L168 Benchmark]: Toolchain (without parser) took 23721.33 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 356.0 MB). Free memory was 959.1 MB in the beginning and 1.3 GB in the end (delta: -358.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 09:33:48,436 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 09:33:48,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.71 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 09:33:48,436 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.45 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 09:33:48,437 INFO L168 Benchmark]: Boogie Preprocessor took 12.20 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 09:33:48,437 INFO L168 Benchmark]: RCFGBuilder took 198.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -172.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-23 09:33:48,437 INFO L168 Benchmark]: BuchiAutomizer took 23338.77 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 221.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -200.0 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. [2018-11-23 09:33:48,438 INFO L168 Benchmark]: Witness Printer took 3.78 ms. Allocated memory is still 1.4 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 09:33:48,444 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.71 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 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 20.45 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.20 ms. Allocated memory is still 1.0 GB. Free memory is still 945.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 198.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -172.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 23338.77 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 221.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -200.0 MB). Peak memory consumption was 21.3 MB. Max. memory is 11.5 GB. * Witness Printer took 3.78 ms. Allocated memory is still 1.4 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 16 terminating modules (8 trivial, 2 deterministic, 6 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 23.2s and 10 iterations. TraceHistogramMax:24. Analysis of lassos took 17.8s. Construction of modules took 1.2s. Büchi inclusion checks took 3.8s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 496 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 442 states and ocurred in iteration 8. Nontrivial modules had stage [2, 0, 6, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 338 SDtfs, 934 SDslu, 469 SDs, 0 SdLazy, 1848 SolverSat, 717 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf97 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 9 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 14.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...