./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 14:26:58,950 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 14:26:58,952 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 14:26:58,959 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 14:26:58,959 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 14:26:58,960 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 14:26:58,961 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 14:26:58,962 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 14:26:58,963 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 14:26:58,964 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 14:26:58,964 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 14:26:58,964 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 14:26:58,965 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 14:26:58,966 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 14:26:58,966 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 14:26:58,967 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 14:26:58,968 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 14:26:58,969 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 14:26:58,970 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 14:26:58,971 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 14:26:58,972 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 14:26:58,973 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 14:26:58,974 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 14:26:58,974 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 14:26:58,975 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 14:26:58,975 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 14:26:58,976 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 14:26:58,976 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 14:26:58,977 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 14:26:58,978 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 14:26:58,978 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 14:26:58,978 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 14:26:58,978 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 14:26:58,979 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 14:26:58,979 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 14:26:58,980 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 14:26:58,980 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-23 14:26:58,991 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 14:26:58,991 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 14:26:58,992 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 14:26:58,992 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 14:26:58,992 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 14:26:58,993 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 14:26:58,993 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 14:26:58,993 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 14:26:58,993 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 14:26:58,993 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 14:26:58,993 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 14:26:58,993 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 14:26:58,993 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 14:26:58,994 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 14:26:58,994 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 14:26:58,994 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 14:26:58,994 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 14:26:58,994 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 14:26:58,994 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 14:26:58,994 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 14:26:58,994 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 14:26:58,995 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 14:26:58,995 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 14:26:58,995 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 14:26:58,995 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 14:26:58,995 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 14:26:58,995 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 14:26:58,995 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 14:26:58,995 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 14:26:58,995 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 14:26:58,996 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 14:26:58,996 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 14:26:58,996 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_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2018-11-23 14:26:59,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 14:26:59,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 14:26:59,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 14:26:59,032 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 14:26:59,033 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 14:26:59,033 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-11-23 14:26:59,078 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/data/25b441959/cb1d422187b54cf8b4ccf5d8409e8ad3/FLAG5ad5ae5a8 [2018-11-23 14:26:59,411 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 14:26:59,411 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-11-23 14:26:59,417 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/data/25b441959/cb1d422187b54cf8b4ccf5d8409e8ad3/FLAG5ad5ae5a8 [2018-11-23 14:26:59,836 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/bin-2019/uautomizer/data/25b441959/cb1d422187b54cf8b4ccf5d8409e8ad3 [2018-11-23 14:26:59,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 14:26:59,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 14:26:59,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 14:26:59,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 14:26:59,843 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 14:26:59,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:26:59,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12858536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59, skipping insertion in model container [2018-11-23 14:26:59,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:26:59,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 14:26:59,861 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 14:26:59,971 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 14:26:59,973 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 14:26:59,982 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 14:26:59,991 INFO L195 MainTranslator]: Completed translation [2018-11-23 14:26:59,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59 WrapperNode [2018-11-23 14:26:59,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 14:26:59,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 14:26:59,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 14:26:59,992 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 14:26:59,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:26:59,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:27:00,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 14:27:00,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 14:27:00,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 14:27:00,009 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 14:27:00,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:27:00,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:27:00,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:27:00,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:27:00,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:27:00,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:27:00,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... [2018-11-23 14:27:00,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 14:27:00,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 14:27:00,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 14:27:00,020 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 14:27:00,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 14:27:00,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 14:27:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-23 14:27:00,091 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-23 14:27:00,178 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 14:27:00,178 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-23 14:27:00,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:00 BoogieIcfgContainer [2018-11-23 14:27:00,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 14:27:00,179 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 14:27:00,179 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 14:27:00,181 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 14:27:00,182 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 14:27:00,182 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 02:26:59" (1/3) ... [2018-11-23 14:27:00,182 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1f20771a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 02:27:00, skipping insertion in model container [2018-11-23 14:27:00,182 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 14:27:00,182 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:26:59" (2/3) ... [2018-11-23 14:27:00,183 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1f20771a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 02:27:00, skipping insertion in model container [2018-11-23 14:27:00,183 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 14:27:00,183 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:00" (3/3) ... [2018-11-23 14:27:00,184 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_5_false-unreach-call_true-termination.c [2018-11-23 14:27:00,217 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 14:27:00,217 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 14:27:00,217 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 14:27:00,217 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 14:27:00,218 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 14:27:00,218 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 14:27:00,218 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 14:27:00,218 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 14:27:00,218 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 14:27:00,227 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 14:27:00,244 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 14:27:00,244 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 14:27:00,244 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 14:27:00,249 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 14:27:00,250 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 14:27:00,250 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 14:27:00,250 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 14:27:00,251 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 14:27:00,251 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 14:27:00,251 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 14:27:00,252 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 14:27:00,252 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 14:27:00,257 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-11-23 14:27:00,257 INFO L796 eck$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 14:27:00,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:00,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-11-23 14:27:00,262 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:00,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:00,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:00,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:00,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:00,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-11-23 14:27:00,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:00,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:00,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:00,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:00,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:00,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-11-23 14:27:00,331 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:00,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:00,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:00,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:00,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:00,419 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 14:27:00,419 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 14:27:00,420 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 14:27:00,420 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 14:27:00,420 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 14:27:00,420 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 14:27:00,420 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 14:27:00,420 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 14:27:00,420 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 14:27:00,421 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 14:27:00,421 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 14:27:00,436 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 14:27:00,440 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 14:27:00,443 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 14:27:00,446 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 14:27:00,454 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 14:27:00,524 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 14:27:00,524 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:00,534 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 14:27:00,535 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 14:27:00,541 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 14:27:00,542 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_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:00,571 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 14:27:00,571 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 14:27:00,578 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 14:27:00,578 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_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:00,600 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 14:27:00,601 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 14:27:00,603 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 14:27:00,603 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_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:00,617 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 14:27:00,617 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 14:27:00,619 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 14:27:00,619 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_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:00,633 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 14:27:00,633 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:00,649 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 14:27:00,649 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 14:27:00,667 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 14:27:00,667 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 14:27:00,668 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 14:27:00,668 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 14:27:00,668 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 14:27:00,668 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 14:27:00,668 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 14:27:00,668 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 14:27:00,668 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 14:27:00,668 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 14:27:00,668 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 14:27:00,668 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 14:27:00,670 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 14:27:00,674 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 14:27:00,678 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 14:27:00,679 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 14:27:00,680 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 14:27:00,722 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 14:27:00,727 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 14:27:00,728 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 14:27:00,729 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:00,730 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:00,730 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:00,730 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:00,730 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:00,732 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:00,732 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:00,736 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 14:27:00,737 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 14:27:00,737 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:00,737 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:00,738 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:00,738 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:00,738 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:00,738 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:00,738 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:00,739 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 14:27:00,740 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 14:27:00,740 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:00,740 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:00,740 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:00,740 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:00,740 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:00,741 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:00,741 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:00,741 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 14:27:00,742 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 14:27:00,742 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:00,742 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:00,742 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:00,742 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:00,742 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:00,742 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:00,743 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:00,743 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 14:27:00,743 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 14:27:00,744 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:00,744 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:00,744 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:00,744 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:00,744 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:00,744 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:00,745 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:00,749 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 14:27:00,752 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 14:27:00,752 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 14:27:00,753 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 14:27:00,753 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 14:27:00,753 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 14:27:00,754 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 14:27:00,754 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 14:27:00,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:00,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:00,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:00,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:00,829 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 14:27:00,843 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 14:27:00,845 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-11-23 14:27:00,949 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 14:27:00,950 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 14:27:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 14:27:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-23 14:27:00,953 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-11-23 14:27:00,954 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:00,954 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-11-23 14:27:00,954 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:00,954 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-23 14:27:00,954 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:00,955 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-11-23 14:27:00,957 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 14:27:00,963 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-11-23 14:27:00,964 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-23 14:27:00,964 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-23 14:27:00,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-11-23 14:27:00,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 14:27:00,966 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-11-23 14:27:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-11-23 14:27:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-11-23 14:27:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 14:27:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-11-23 14:27:00,986 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 14:27:00,986 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 14:27:00,986 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 14:27:00,986 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-11-23 14:27:00,987 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 14:27:00,987 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 14:27:00,987 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 14:27:00,987 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:27:00,987 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:27:00,988 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-11-23 14:27:00,988 INFO L796 eck$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 14:27:00,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:00,988 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-11-23 14:27:00,988 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:00,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:00,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:00,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:00,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:01,039 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 14:27:01,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 14:27:01,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 14:27:01,042 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 14:27:01,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:01,043 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-11-23 14:27:01,043 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:01,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:01,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:01,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:01,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 14:27:01,081 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 14:27:01,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 14:27:01,081 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 14:27:01,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 14:27:01,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 14:27:01,085 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-23 14:27:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:27:01,153 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-11-23 14:27:01,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 14:27:01,154 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-11-23 14:27:01,156 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 14:27:01,157 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-11-23 14:27:01,157 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-11-23 14:27:01,157 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-11-23 14:27:01,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-11-23 14:27:01,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 14:27:01,158 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 14:27:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-11-23 14:27:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-23 14:27:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 14:27:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-11-23 14:27:01,161 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 14:27:01,161 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 14:27:01,161 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 14:27:01,161 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-11-23 14:27:01,162 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 14:27:01,162 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 14:27:01,162 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 14:27:01,163 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:27:01,163 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 14:27:01,163 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-11-23 14:27:01,163 INFO L796 eck$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 14:27:01,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-11-23 14:27:01,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:01,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:01,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:01,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:01,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:01,205 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 14:27:01,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:27:01,206 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:01,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:01,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:01,221 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 14:27:01,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 14:27:01,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 14:27:01,236 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 14:27:01,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:01,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-11-23 14:27:01,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:01,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:01,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:01,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:01,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:01,353 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 14:27:01,353 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 14:27:01,353 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 14:27:01,353 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 14:27:01,353 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 14:27:01,353 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 14:27:01,354 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 14:27:01,354 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 14:27:01,354 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 14:27:01,354 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 14:27:01,354 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 14:27:01,355 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 14:27:01,359 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 14:27:01,361 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 14:27:01,363 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 14:27:01,395 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 14:27:01,395 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:01,400 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 14:27:01,400 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:01,416 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 14:27:01,416 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 14:27:01,905 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 14:27:01,906 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 14:27:01,906 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 14:27:01,907 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 14:27:01,907 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 14:27:01,907 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 14:27:01,907 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 14:27:01,907 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 14:27:01,907 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 14:27:01,907 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 14:27:01,907 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 14:27:01,907 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 14:27:01,908 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 14:27:01,910 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 14:27:01,915 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 14:27:01,916 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 14:27:01,952 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 14:27:01,953 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 14:27:01,953 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 14:27:01,954 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:01,954 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:01,954 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:01,954 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:01,954 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:01,954 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:01,955 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:01,957 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 14:27:01,957 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 14:27:01,957 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:01,958 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:01,958 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:01,958 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:01,958 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:01,959 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:01,959 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:01,963 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 14:27:01,967 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 14:27:01,967 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 14:27:01,967 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 14:27:01,967 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 14:27:01,968 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 14:27:01,968 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 14:27:01,968 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 14:27:01,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:01,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:02,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:02,046 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 14:27:02,047 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 14:27:02,047 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-23 14:27:02,151 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 14:27:02,152 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 14:27:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 14:27:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 14:27:02,153 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-11-23 14:27:02,153 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:02,153 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-11-23 14:27:02,154 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:02,154 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-11-23 14:27:02,154 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:02,154 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-11-23 14:27:02,158 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 14:27:02,161 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-11-23 14:27:02,161 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-11-23 14:27:02,162 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 14:27:02,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-11-23 14:27:02,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 14:27:02,162 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-11-23 14:27:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-11-23 14:27:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-11-23 14:27:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 14:27:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-11-23 14:27:02,170 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-11-23 14:27:02,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 14:27:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 14:27:02,171 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-11-23 14:27:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:27:02,222 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-11-23 14:27:02,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 14:27:02,223 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-11-23 14:27:02,225 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 14:27:02,227 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-11-23 14:27:02,227 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-11-23 14:27:02,228 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 14:27:02,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-11-23 14:27:02,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 14:27:02,228 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-11-23 14:27:02,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-11-23 14:27:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-11-23 14:27:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 14:27:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-11-23 14:27:02,235 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 14:27:02,235 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 14:27:02,235 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 14:27:02,235 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-11-23 14:27:02,237 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 14:27:02,237 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 14:27:02,237 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 14:27:02,238 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 14:27:02,238 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 14:27:02,238 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 704#L25 call main_#t~ret2 := fibo(main_~x~0);< 726#fiboENTRY ~n := #in~n; 748#L6 assume !(~n < 1); 707#L8 assume !(1 == ~n); 708#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 720#L6 assume !(~n < 1); 752#L8 assume 1 == ~n;#res := 1; 751#fiboFINAL assume true; 750#fiboEXIT >#32#return; 710#L11-1 call #t~ret1 := fibo(~n - 2);< 749#fiboENTRY ~n := #in~n; 777#L6 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 773#fiboEXIT >#34#return; 772#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 771#fiboFINAL assume true; 759#fiboEXIT >#32#return; 760#L11-1 [2018-11-23 14:27:02,238 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 14:27:02,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:02,238 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-11-23 14:27:02,239 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:02,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:02,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:02,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:02,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:02,291 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 14:27:02,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:27:02,292 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:02,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:02,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:02,311 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 14:27:02,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 14:27:02,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 14:27:02,327 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 14:27:02,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:02,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-11-23 14:27:02,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:02,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:02,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:02,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:02,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:02,384 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 14:27:02,384 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 14:27:02,384 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 14:27:02,384 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 14:27:02,384 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 14:27:02,384 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 14:27:02,384 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 14:27:02,384 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 14:27:02,384 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 14:27:02,384 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 14:27:02,384 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 14:27:02,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 14:27:02,392 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 14:27:02,394 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 14:27:02,396 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 14:27:02,416 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 14:27:02,416 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:02,418 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 14:27:02,418 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:02,435 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 14:27:02,435 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 14:27:02,925 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 14:27:02,927 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 14:27:02,927 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 14:27:02,927 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 14:27:02,927 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 14:27:02,927 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 14:27:02,927 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 14:27:02,927 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 14:27:02,927 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 14:27:02,927 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 14:27:02,928 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 14:27:02,928 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 14:27:02,928 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 14:27:02,930 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 14:27:02,931 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 14:27:02,933 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 14:27:02,963 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 14:27:02,964 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 14:27:02,964 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 14:27:02,964 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:02,964 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:02,965 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:02,965 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:02,965 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:02,965 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:02,965 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:02,966 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 14:27:02,966 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 14:27:02,967 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:02,967 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:02,967 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:02,967 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:02,967 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:02,968 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:02,968 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:02,968 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 14:27:02,969 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 14:27:02,969 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:02,969 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:02,969 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:02,969 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:02,970 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:02,970 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:02,970 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:02,971 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 14:27:02,972 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 14:27:02,972 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:02,972 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:02,972 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:02,973 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:02,973 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:02,973 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:02,973 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:02,977 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 14:27:02,979 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 14:27:02,979 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 14:27:02,979 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 14:27:02,979 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 14:27:02,980 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 14:27:02,980 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 14:27:02,980 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 14:27:03,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:03,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:03,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:03,071 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 14:27:03,071 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 14:27:03,071 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 14:27:03,152 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 14:27:03,152 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 14:27:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 14:27:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 14:27:03,153 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 14:27:03,153 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:03,153 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 14:27:03,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:03,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:03,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:03,235 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 14:27:03,235 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 14:27:03,235 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 14:27:03,323 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 14:27:03,325 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 14:27:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 14:27:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-11-23 14:27:03,326 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 14:27:03,326 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:03,326 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 14:27:03,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:03,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:03,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:03,423 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 14:27:03,424 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 14:27:03,424 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 14:27:03,576 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 14:27:03,577 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 14:27:03,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 14:27:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-11-23 14:27:03,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 14:27:03,578 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:03,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-11-23 14:27:03,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:03,579 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-11-23 14:27:03,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:03,580 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-11-23 14:27:03,591 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 14:27:03,599 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-11-23 14:27:03,599 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-23 14:27:03,600 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-11-23 14:27:03,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-11-23 14:27:03,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 14:27:03,600 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-11-23 14:27:03,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-11-23 14:27:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-11-23 14:27:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-23 14:27:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-11-23 14:27:03,626 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-11-23 14:27:03,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 14:27:03,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 14:27:03,626 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-11-23 14:27:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:27:03,751 INFO L93 Difference]: Finished difference Result 497 states and 787 transitions. [2018-11-23 14:27:03,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 14:27:03,753 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 787 transitions. [2018-11-23 14:27:03,760 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 14:27:03,767 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 784 transitions. [2018-11-23 14:27:03,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-11-23 14:27:03,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-23 14:27:03,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 784 transitions. [2018-11-23 14:27:03,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 14:27:03,768 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 784 transitions. [2018-11-23 14:27:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 784 transitions. [2018-11-23 14:27:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 365. [2018-11-23 14:27:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2018-11-23 14:27:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 517 transitions. [2018-11-23 14:27:03,787 INFO L728 BuchiCegarLoop]: Abstraction has 365 states and 517 transitions. [2018-11-23 14:27:03,787 INFO L608 BuchiCegarLoop]: Abstraction has 365 states and 517 transitions. [2018-11-23 14:27:03,788 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 14:27:03,788 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 365 states and 517 transitions. [2018-11-23 14:27:03,790 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 14:27:03,790 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 14:27:03,790 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 14:27:03,791 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-23 14:27:03,791 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 14:27:03,791 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3586#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3597#L8 assume !(1 == ~n); 3592#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3594#L6 assume !(~n < 1); 3595#L8 assume !(1 == ~n); 3555#L11 call #t~ret0 := fibo(~n - 1);< 3589#fiboENTRY ~n := #in~n; 3591#L6 assume !(~n < 1); 3593#L8 assume !(1 == ~n); 3554#L11 call #t~ret0 := fibo(~n - 1);< 3589#fiboENTRY ~n := #in~n; 3590#L6 assume !(~n < 1); 3553#L8 assume 1 == ~n;#res := 1; 3556#fiboFINAL assume true; 3672#fiboEXIT >#32#return; 3617#L11-1 call #t~ret1 := fibo(~n - 2);< 3618#fiboENTRY ~n := #in~n; 3739#L6 assume !(~n < 1); 3736#L8 assume !(1 == ~n); 3737#L11 call #t~ret0 := fibo(~n - 1);< 3749#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3863#L8 assume !(1 == ~n); 3666#L11 call #t~ret0 := fibo(~n - 1);< 3872#fiboENTRY [2018-11-23 14:27:03,791 INFO L796 eck$LassoCheckResult]: Loop: 3872#fiboENTRY ~n := #in~n; 3879#L6 assume !(~n < 1); 3878#L8 assume !(1 == ~n); 3667#L11 call #t~ret0 := fibo(~n - 1);< 3872#fiboENTRY [2018-11-23 14:27:03,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:03,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-11-23 14:27:03,792 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:03,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:03,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:03,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 14:27:03,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 14:27:03,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 14:27:03,888 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:03,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:03,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:04,010 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 14:27:04,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 14:27:04,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-11-23 14:27:04,025 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 14:27:04,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-11-23 14:27:04,025 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 14:27:04,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 14:27:04,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:04,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 14:27:04,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 14:27:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 14:27:04,043 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 14:27:04,043 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 14:27:04,043 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 14:27:04,043 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 14:27:04,043 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 14:27:04,043 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 14:27:04,043 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 14:27:04,043 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 14:27:04,044 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 14:27:04,044 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 14:27:04,044 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 14:27:04,044 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 14:27:04,045 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 14:27:04,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 14:27:04,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 14:27:04,054 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 14:27:04,069 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 14:27:04,069 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:04,075 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 14:27:04,075 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 14:27:04,077 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 14:27:04,077 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_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:04,092 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 14:27:04,092 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4dd88faf-7f60-44b8-84fd-6419051564ad/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 14:27:04,109 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 14:27:04,109 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 14:27:04,125 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 14:27:04,126 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 14:27:04,126 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 14:27:04,126 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 14:27:04,126 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 14:27:04,126 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 14:27:04,126 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 14:27:04,126 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 14:27:04,126 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 14:27:04,127 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 14:27:04,127 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 14:27:04,127 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 14:27:04,127 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 14:27:04,131 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 14:27:04,132 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 14:27:04,133 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 14:27:04,135 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 14:27:04,159 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 14:27:04,159 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 14:27:04,159 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 14:27:04,160 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 14:27:04,160 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 14:27:04,160 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 14:27:04,160 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 14:27:04,160 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 14:27:04,160 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 14:27:04,160 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 14:27:04,162 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 14:27:04,163 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 14:27:04,164 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 14:27:04,164 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 14:27:04,164 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 14:27:04,164 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 14:27:04,164 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 14:27:04,164 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 14:27:04,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:04,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:04,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:04,231 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 14:27:04,231 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 14:27:04,231 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-11-23 14:27:04,272 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 375 states and 527 transitions. Complement of second has 13 states. [2018-11-23 14:27:04,274 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 14:27:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 14:27:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 14:27:04,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 14:27:04,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:04,275 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 14:27:04,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:04,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:04,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:04,350 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 14:27:04,350 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 14:27:04,350 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-11-23 14:27:04,392 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 375 states and 527 transitions. Complement of second has 13 states. [2018-11-23 14:27:04,394 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 14:27:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 14:27:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 14:27:04,394 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 14:27:04,394 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:04,394 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 14:27:04,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 14:27:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:04,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 14:27:04,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 14:27:04,479 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 14:27:04,479 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 14:27:04,480 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-11-23 14:27:04,551 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 492 states and 654 transitions. Complement of second has 14 states. [2018-11-23 14:27:04,554 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 14:27:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 14:27:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-11-23 14:27:04,555 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 14:27:04,555 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:04,555 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-11-23 14:27:04,555 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:04,555 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-11-23 14:27:04,556 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 14:27:04,556 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 492 states and 654 transitions. [2018-11-23 14:27:04,562 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 14:27:04,567 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 492 states to 405 states and 565 transitions. [2018-11-23 14:27:04,567 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2018-11-23 14:27:04,568 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 160 [2018-11-23 14:27:04,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 405 states and 565 transitions. [2018-11-23 14:27:04,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 14:27:04,568 INFO L705 BuchiCegarLoop]: Abstraction has 405 states and 565 transitions. [2018-11-23 14:27:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states and 565 transitions. [2018-11-23 14:27:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 389. [2018-11-23 14:27:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-11-23 14:27:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 541 transitions. [2018-11-23 14:27:04,583 INFO L728 BuchiCegarLoop]: Abstraction has 389 states and 541 transitions. [2018-11-23 14:27:04,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 14:27:04,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-11-23 14:27:04,583 INFO L87 Difference]: Start difference. First operand 389 states and 541 transitions. Second operand 20 states. [2018-11-23 14:27:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 14:27:04,862 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2018-11-23 14:27:04,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 14:27:04,862 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 169 states and 208 transitions. [2018-11-23 14:27:04,863 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 14:27:04,864 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 169 states to 0 states and 0 transitions. [2018-11-23 14:27:04,864 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 14:27:04,864 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 14:27:04,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 14:27:04,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 14:27:04,864 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 14:27:04,864 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 14:27:04,864 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 14:27:04,864 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 14:27:04,864 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 14:27:04,864 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 14:27:04,864 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 14:27:04,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 02:27:04 BoogieIcfgContainer [2018-11-23 14:27:04,869 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 14:27:04,869 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 14:27:04,869 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 14:27:04,870 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 14:27:04,870 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:00" (3/4) ... [2018-11-23 14:27:04,872 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 14:27:04,873 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 14:27:04,873 INFO L168 Benchmark]: Toolchain (without parser) took 5034.04 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 319.8 MB). Free memory was 959.2 MB in the beginning and 1.3 GB in the end (delta: -332.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 14:27:04,874 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 14:27:04,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.10 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 14:27:04,875 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.15 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 14:27:04,875 INFO L168 Benchmark]: Boogie Preprocessor took 10.89 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 14:27:04,875 INFO L168 Benchmark]: RCFGBuilder took 158.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -176.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-23 14:27:04,876 INFO L168 Benchmark]: BuchiAutomizer took 4690.05 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 177.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -169.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. [2018-11-23 14:27:04,876 INFO L168 Benchmark]: Witness Printer took 3.27 ms. Allocated memory is still 1.3 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 14:27:04,879 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 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 151.10 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.15 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.89 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 158.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -176.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4690.05 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 177.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -169.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. * Witness Printer took 3.27 ms. Allocated memory is still 1.3 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 8 terminating modules (4 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 4 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.6s and 6 iterations. TraceHistogramMax:6. Analysis of lassos took 2.5s. Construction of modules took 0.4s. Büchi inclusion checks took 1.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 254 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 365 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 149 SDtfs, 379 SDslu, 185 SDs, 0 SdLazy, 716 SolverSat, 197 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp90 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq189 hnf92 smp84 dnf100 smp100 tf110 neg97 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...