./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 595c6555624af5bbcf79585a20acb2500e3eeee8 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 14:35:49,328 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 14:35:49,329 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 14:35:49,335 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 14:35:49,335 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 14:35:49,336 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 14:35:49,337 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 14:35:49,338 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 14:35:49,339 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 14:35:49,340 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 14:35:49,340 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 14:35:49,340 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 14:35:49,341 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 14:35:49,342 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 14:35:49,342 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 14:35:49,343 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 14:35:49,343 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 14:35:49,344 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 14:35:49,345 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 14:35:49,346 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 14:35:49,346 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 14:35:49,347 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 14:35:49,348 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 14:35:49,348 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 14:35:49,348 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 14:35:49,349 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 14:35:49,350 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 14:35:49,350 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 14:35:49,351 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 14:35:49,352 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 14:35:49,352 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 14:35:49,352 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 14:35:49,352 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 14:35:49,352 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 14:35:49,353 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 14:35:49,354 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 14:35:49,354 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-18 14:35:49,362 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 14:35:49,362 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 14:35:49,362 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 14:35:49,363 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 14:35:49,363 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 14:35:49,363 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-18 14:35:49,363 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-18 14:35:49,363 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-18 14:35:49,363 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-18 14:35:49,363 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-18 14:35:49,364 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-18 14:35:49,364 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 14:35:49,364 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 14:35:49,364 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 14:35:49,364 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 14:35:49,364 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 14:35:49,364 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 14:35:49,364 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-18 14:35:49,365 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-18 14:35:49,365 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-18 14:35:49,365 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 14:35:49,365 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 14:35:49,365 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-18 14:35:49,365 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 14:35:49,365 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-18 14:35:49,366 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 14:35:49,366 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 14:35:49,366 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-18 14:35:49,366 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 14:35:49,366 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 14:35:49,366 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-18 14:35:49,367 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-18 14:35:49,367 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_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-11-18 14:35:49,390 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 14:35:49,399 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 14:35:49,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 14:35:49,402 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 14:35:49,403 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 14:35:49,403 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-18 14:35:49,445 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/data/533f79ae8/98e2a872df8245169c85bcb00e1dd568/FLAGc752398a5 [2018-11-18 14:35:49,855 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 14:35:49,855 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-18 14:35:49,859 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/data/533f79ae8/98e2a872df8245169c85bcb00e1dd568/FLAGc752398a5 [2018-11-18 14:35:49,870 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/data/533f79ae8/98e2a872df8245169c85bcb00e1dd568 [2018-11-18 14:35:49,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 14:35:49,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 14:35:49,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 14:35:49,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 14:35:49,876 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 14:35:49,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:35:49" (1/1) ... [2018-11-18 14:35:49,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300c35c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:49, skipping insertion in model container [2018-11-18 14:35:49,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:35:49" (1/1) ... [2018-11-18 14:35:49,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 14:35:49,895 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 14:35:50,001 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 14:35:50,004 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 14:35:50,013 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 14:35:50,021 INFO L195 MainTranslator]: Completed translation [2018-11-18 14:35:50,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50 WrapperNode [2018-11-18 14:35:50,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 14:35:50,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 14:35:50,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 14:35:50,022 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 14:35:50,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... [2018-11-18 14:35:50,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... [2018-11-18 14:35:50,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 14:35:50,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 14:35:50,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 14:35:50,039 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 14:35:50,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... [2018-11-18 14:35:50,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... [2018-11-18 14:35:50,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... [2018-11-18 14:35:50,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... [2018-11-18 14:35:50,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... [2018-11-18 14:35:50,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... [2018-11-18 14:35:50,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... [2018-11-18 14:35:50,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 14:35:50,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 14:35:50,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 14:35:50,049 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 14:35:50,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 14:35:50,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 14:35:50,121 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-18 14:35:50,121 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-18 14:35:50,121 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-18 14:35:50,121 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-18 14:35:50,215 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 14:35:50,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:35:50 BoogieIcfgContainer [2018-11-18 14:35:50,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 14:35:50,216 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-18 14:35:50,216 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-18 14:35:50,219 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-18 14:35:50,220 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 14:35:50,220 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 02:35:49" (1/3) ... [2018-11-18 14:35:50,221 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@28bea495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 02:35:50, skipping insertion in model container [2018-11-18 14:35:50,221 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 14:35:50,221 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:35:50" (2/3) ... [2018-11-18 14:35:50,221 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@28bea495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 02:35:50, skipping insertion in model container [2018-11-18 14:35:50,221 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 14:35:50,221 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:35:50" (3/3) ... [2018-11-18 14:35:50,223 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-18 14:35:50,266 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 14:35:50,267 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-18 14:35:50,267 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-18 14:35:50,267 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-18 14:35:50,267 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 14:35:50,267 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 14:35:50,267 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-18 14:35:50,267 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 14:35:50,267 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-18 14:35:50,279 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states. [2018-11-18 14:35:50,299 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 14:35:50,300 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:50,300 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:50,306 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 14:35:50,306 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:50,306 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-18 14:35:50,307 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states. [2018-11-18 14:35:50,309 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 14:35:50,309 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:50,309 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:50,309 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 14:35:50,310 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:50,316 INFO L794 eck$LassoCheckResult]: Stem: 24#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 17#L37true call main_#t~ret4 := fibo1(main_~x~0);< 25#fibo1ENTRYtrue [2018-11-18 14:35:50,316 INFO L796 eck$LassoCheckResult]: Loop: 25#fibo1ENTRYtrue ~n := #in~n; 13#L8true assume !(~n < 1); 4#L10true assume !(1 == ~n); 19#L13true call #t~ret0 := fibo2(~n - 1);< 11#fibo2ENTRYtrue ~n := #in~n; 28#L18true assume !(~n < 1); 26#L20true assume !(1 == ~n); 3#L23true call #t~ret2 := fibo1(~n - 1);< 25#fibo1ENTRYtrue [2018-11-18 14:35:50,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:50,321 INFO L82 PathProgramCache]: Analyzing trace with hash 29896, now seen corresponding path program 1 times [2018-11-18 14:35:50,323 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:50,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:50,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:50,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:50,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:50,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash 181289832, now seen corresponding path program 1 times [2018-11-18 14:35:50,384 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:50,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:50,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:50,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:50,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:50,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1313669423, now seen corresponding path program 1 times [2018-11-18 14:35:50,398 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:50,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:50,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:50,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:50,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:50,555 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:50,556 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:50,556 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:50,556 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:50,556 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 14:35:50,556 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:50,557 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:50,557 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:50,557 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-18 14:35:50,557 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:50,557 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:50,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,578 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,582 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,585 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,685 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:50,686 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,689 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,689 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,701 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:50,701 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,716 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,717 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,719 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:50,719 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,739 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,739 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,742 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:50,742 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,757 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,757 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,758 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:50,759 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,773 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,773 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,775 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:50,775 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret3=0} Honda state: {fibo2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,790 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,790 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,792 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:50,793 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 8 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:50,807 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,808 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,810 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:50,810 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,826 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,826 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,830 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:50,830 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret1=0} Honda state: {fibo1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,845 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,845 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,847 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:50,847 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret0=0} Honda state: {fibo1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:50,872 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:50,872 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:50,889 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 14:35:50,889 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:50,928 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 14:35:50,929 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:50,929 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:50,929 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:50,929 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:50,929 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 14:35:50,929 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:50,929 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:50,930 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:50,930 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-18 14:35:50,930 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:50,930 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:50,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,935 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:50,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,013 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:51,017 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 14:35:51,018 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 [2018-11-18 14:35:51,019 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:51,020 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:51,020 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:51,020 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:51,020 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:51,022 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:51,022 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:51,025 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:51,026 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 [2018-11-18 14:35:51,026 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:51,027 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:51,027 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:51,027 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:51,027 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:51,027 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:51,027 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:51,028 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:51,029 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 14:35:51,029 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:51,029 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:51,030 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:51,030 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:51,030 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:51,030 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:51,030 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:51,032 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:51,032 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 [2018-11-18 14:35:51,032 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:51,032 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:51,033 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:51,033 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:51,033 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:51,033 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:51,033 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:51,034 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:51,035 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 [2018-11-18 14:35:51,035 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:51,035 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:51,036 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:51,036 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:51,036 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:51,036 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:51,036 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:51,037 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:51,038 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 14:35:51,038 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:51,038 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:51,039 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:51,039 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:51,039 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:51,039 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:51,039 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:51,040 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:51,041 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 [2018-11-18 14:35:51,041 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:51,041 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:51,041 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:51,042 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:51,042 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:51,042 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:51,042 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:51,043 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:51,044 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 [2018-11-18 14:35:51,044 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:51,044 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:51,044 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:51,045 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:51,045 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:51,045 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:51,045 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:51,046 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:51,047 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 [2018-11-18 14:35:51,047 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:51,047 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:51,048 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:51,048 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:51,048 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:51,048 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:51,048 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:51,053 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 14:35:51,057 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 14:35:51,057 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 14:35:51,058 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 14:35:51,059 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 14:35:51,059 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 14:35:51,059 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2018-11-18 14:35:51,060 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 14:35:51,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:51,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:51,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:51,241 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2018-11-18 14:35:51,242 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 26 states. Second operand 6 states. [2018-11-18 14:35:51,392 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 26 states.. Second operand 6 states. Result 84 states and 116 transitions. Complement of second has 24 states. [2018-11-18 14:35:51,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-18 14:35:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2018-11-18 14:35:51,396 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2018-11-18 14:35:51,397 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:51,397 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2018-11-18 14:35:51,397 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:51,397 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2018-11-18 14:35:51,398 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:51,398 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 84 states and 116 transitions. [2018-11-18 14:35:51,402 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 14:35:51,407 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 84 states to 61 states and 82 transitions. [2018-11-18 14:35:51,408 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2018-11-18 14:35:51,409 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2018-11-18 14:35:51,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2018-11-18 14:35:51,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:51,410 INFO L705 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2018-11-18 14:35:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2018-11-18 14:35:51,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2018-11-18 14:35:51,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 14:35:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2018-11-18 14:35:51,433 INFO L728 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2018-11-18 14:35:51,433 INFO L608 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2018-11-18 14:35:51,434 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-18 14:35:51,434 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2018-11-18 14:35:51,435 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 14:35:51,435 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:51,435 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:51,435 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:51,436 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:51,436 INFO L794 eck$LassoCheckResult]: Stem: 231#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 227#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 214#L37 call main_#t~ret4 := fibo1(main_~x~0);< 216#fibo1ENTRY ~n := #in~n; 228#L8 assume !(~n < 1); 213#L10 assume !(1 == ~n); 205#L13 call #t~ret0 := fibo2(~n - 1);< 221#fibo2ENTRY ~n := #in~n; 248#L18 assume !(~n < 1); 249#L20 assume !(1 == ~n); 200#L23 call #t~ret2 := fibo1(~n - 1);< 203#fibo1ENTRY ~n := #in~n; 229#L8 assume ~n < 1;#res := 0; 212#fibo1FINAL assume true; 219#fibo1EXIT >#46#return; 215#L23-1 [2018-11-18 14:35:51,436 INFO L796 eck$LassoCheckResult]: Loop: 215#L23-1 call #t~ret3 := fibo1(~n - 2);< 199#fibo1ENTRY ~n := #in~n; 244#L8 assume !(~n < 1); 242#L10 assume !(1 == ~n); 198#L13 call #t~ret0 := fibo2(~n - 1);< 222#fibo2ENTRY ~n := #in~n; 241#L18 assume !(~n < 1); 237#L20 assume !(1 == ~n); 196#L23 call #t~ret2 := fibo1(~n - 1);< 199#fibo1ENTRY ~n := #in~n; 244#L8 assume ~n < 1;#res := 0; 224#fibo1FINAL assume true; 225#fibo1EXIT >#46#return; 215#L23-1 [2018-11-18 14:35:51,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1888024054, now seen corresponding path program 1 times [2018-11-18 14:35:51,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:51,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:51,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:51,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:51,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 14:35:51,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 14:35:51,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 14:35:51,502 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 14:35:51,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1730504828, now seen corresponding path program 1 times [2018-11-18 14:35:51,503 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:51,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:51,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:51,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:51,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 14:35:51,534 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 14:35:51,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 14:35:51,535 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 14:35:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 14:35:51,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 14:35:51,537 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2018-11-18 14:35:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:35:51,603 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2018-11-18 14:35:51,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 14:35:51,604 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2018-11-18 14:35:51,606 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 14:35:51,608 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2018-11-18 14:35:51,608 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2018-11-18 14:35:51,608 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2018-11-18 14:35:51,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2018-11-18 14:35:51,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:51,609 INFO L705 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2018-11-18 14:35:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2018-11-18 14:35:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2018-11-18 14:35:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-18 14:35:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2018-11-18 14:35:51,614 INFO L728 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2018-11-18 14:35:51,615 INFO L608 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2018-11-18 14:35:51,615 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-18 14:35:51,615 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2018-11-18 14:35:51,616 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 14:35:51,616 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:51,616 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:51,617 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:51,617 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:51,617 INFO L794 eck$LassoCheckResult]: Stem: 365#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 364#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 343#L37 call main_#t~ret4 := fibo1(main_~x~0);< 344#fibo1ENTRY ~n := #in~n; 372#L8 assume !(~n < 1); 348#L10 assume !(1 == ~n); 339#L13 call #t~ret0 := fibo2(~n - 1);< 358#fibo2ENTRY ~n := #in~n; 388#L18 assume !(~n < 1); 389#L20 assume !(1 == ~n); 337#L23 call #t~ret2 := fibo1(~n - 1);< 342#fibo1ENTRY ~n := #in~n; 367#L8 assume !(~n < 1); 383#L10 assume 1 == ~n;#res := 1; 382#fibo1FINAL assume true; 378#fibo1EXIT >#46#return; 346#L23-1 [2018-11-18 14:35:51,617 INFO L796 eck$LassoCheckResult]: Loop: 346#L23-1 call #t~ret3 := fibo1(~n - 2);< 336#fibo1ENTRY ~n := #in~n; 366#L8 assume !(~n < 1); 345#L10 assume !(1 == ~n); 335#L13 call #t~ret0 := fibo2(~n - 1);< 381#fibo2ENTRY ~n := #in~n; 386#L18 assume !(~n < 1); 376#L20 assume !(1 == ~n); 333#L23 call #t~ret2 := fibo1(~n - 1);< 336#fibo1ENTRY ~n := #in~n; 366#L8 assume !(~n < 1); 345#L10 assume 1 == ~n;#res := 1; 347#fibo1FINAL assume true; 362#fibo1EXIT >#46#return; 346#L23-1 [2018-11-18 14:35:51,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:51,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1600771562, now seen corresponding path program 1 times [2018-11-18 14:35:51,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:51,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:51,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:51,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:51,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:51,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:51,665 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:51,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:51,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:51,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 14:35:51,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 14:35:51,700 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 14:35:51,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:51,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2106067024, now seen corresponding path program 1 times [2018-11-18 14:35:51,701 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:51,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:51,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:51,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:51,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:51,811 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:51,811 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:51,811 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:51,812 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:51,812 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 14:35:51,812 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:51,812 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:51,812 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:51,812 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-18 14:35:51,812 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:51,812 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:51,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,819 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,822 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,825 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:51,851 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:51,851 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:51,853 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:51,853 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:51,856 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:51,856 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:51,884 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:51,884 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:51,886 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:51,886 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:51,901 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:51,901 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/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 [2018-11-18 14:35:51,918 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 14:35:51,918 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:52,587 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 14:35:52,589 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:52,589 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:52,589 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:52,589 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:52,589 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 14:35:52,589 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:52,589 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:52,589 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:52,589 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-18 14:35:52,589 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:52,589 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:52,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:52,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:52,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:52,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:52,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:52,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:52,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:52,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:52,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:52,628 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:52,628 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 14:35:52,628 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 [2018-11-18 14:35:52,629 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:52,629 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:52,629 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:52,629 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:52,629 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:52,630 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:52,630 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:52,632 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:52,632 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 [2018-11-18 14:35:52,633 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:52,633 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:52,633 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:52,633 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:52,633 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:52,634 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:52,634 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:52,635 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:52,635 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 [2018-11-18 14:35:52,635 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:52,635 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:52,635 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:52,636 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:52,636 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:52,636 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:52,636 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:52,640 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 14:35:52,643 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 14:35:52,643 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 14:35:52,643 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 14:35:52,643 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 14:35:52,643 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 14:35:52,643 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2018-11-18 14:35:52,644 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 14:35:52,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:52,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:52,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:52,753 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2018-11-18 14:35:52,753 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 9 states. [2018-11-18 14:35:52,923 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 9 states. Result 191 states and 263 transitions. Complement of second has 26 states. [2018-11-18 14:35:52,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-18 14:35:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2018-11-18 14:35:52,924 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 68 transitions. Stem has 16 letters. Loop has 14 letters. [2018-11-18 14:35:52,924 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:52,924 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 68 transitions. Stem has 30 letters. Loop has 14 letters. [2018-11-18 14:35:52,925 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:52,925 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 68 transitions. Stem has 16 letters. Loop has 28 letters. [2018-11-18 14:35:52,925 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:52,925 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2018-11-18 14:35:52,929 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 14:35:52,933 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2018-11-18 14:35:52,933 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2018-11-18 14:35:52,934 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2018-11-18 14:35:52,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2018-11-18 14:35:52,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:52,934 INFO L705 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2018-11-18 14:35:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2018-11-18 14:35:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2018-11-18 14:35:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-11-18 14:35:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2018-11-18 14:35:52,946 INFO L728 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2018-11-18 14:35:52,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 14:35:52,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-18 14:35:52,947 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 9 states. [2018-11-18 14:35:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:35:53,024 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2018-11-18 14:35:53,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 14:35:53,025 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2018-11-18 14:35:53,028 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 14:35:53,031 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2018-11-18 14:35:53,031 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2018-11-18 14:35:53,032 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2018-11-18 14:35:53,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2018-11-18 14:35:53,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:53,033 INFO L705 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2018-11-18 14:35:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2018-11-18 14:35:53,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2018-11-18 14:35:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-11-18 14:35:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2018-11-18 14:35:53,042 INFO L728 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2018-11-18 14:35:53,042 INFO L608 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2018-11-18 14:35:53,042 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-18 14:35:53,042 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2018-11-18 14:35:53,044 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 14:35:53,044 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:53,044 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:53,048 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-11-18 14:35:53,048 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-11-18 14:35:53,048 INFO L794 eck$LassoCheckResult]: Stem: 1176#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1171#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 1154#L37 call main_#t~ret4 := fibo1(main_~x~0);< 1155#fibo1ENTRY ~n := #in~n; 1219#L8 assume !(~n < 1); 1218#L10 assume !(1 == ~n); 1132#L13 call #t~ret0 := fibo2(~n - 1);< 1164#fibo2ENTRY ~n := #in~n; 1281#L18 assume !(~n < 1); 1280#L20 assume !(1 == ~n); 1167#L23 call #t~ret2 := fibo1(~n - 1);< 1130#fibo1ENTRY ~n := #in~n; 1216#L8 assume !(~n < 1); 1215#L10 assume !(1 == ~n); 1128#L13 call #t~ret0 := fibo2(~n - 1);< 1208#fibo2ENTRY ~n := #in~n; 1212#L18 assume !(~n < 1); 1213#L20 assume !(1 == ~n); 1127#L23 call #t~ret2 := fibo1(~n - 1);< 1130#fibo1ENTRY ~n := #in~n; 1216#L8 assume !(~n < 1); 1215#L10 assume !(1 == ~n); 1128#L13 call #t~ret0 := fibo2(~n - 1);< 1208#fibo2ENTRY ~n := #in~n; 1212#L18 assume ~n < 1;#res := 0; 1211#fibo2FINAL assume true; 1207#fibo2EXIT >#50#return; 1129#L13-1 call #t~ret1 := fibo2(~n - 2);< 1168#fibo2ENTRY ~n := #in~n; 1178#L18 assume !(~n < 1); 1185#L20 assume !(1 == ~n); 1127#L23 call #t~ret2 := fibo1(~n - 1);< 1130#fibo1ENTRY ~n := #in~n; 1217#L8 assume !(~n < 1); 1223#L10 assume 1 == ~n;#res := 1; 1222#fibo1FINAL assume true; 1220#fibo1EXIT >#46#return; 1204#L23-1 call #t~ret3 := fibo1(~n - 2);< 1136#fibo1ENTRY ~n := #in~n; 1210#L8 assume !(~n < 1); 1206#L10 assume !(1 == ~n); 1134#L13 call #t~ret0 := fibo2(~n - 1);< 1203#fibo2ENTRY ~n := #in~n; 1200#L18 assume ~n < 1;#res := 0; 1201#fibo2FINAL assume true; 1209#fibo2EXIT >#50#return; 1135#L13-1 call #t~ret1 := fibo2(~n - 2);< 1203#fibo2ENTRY ~n := #in~n; 1200#L18 assume !(~n < 1); 1196#L20 assume 1 == ~n;#res := 1; 1137#fibo2FINAL assume true; 1138#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#48#return; 1274#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 1271#fibo2FINAL assume true; 1268#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#46#return; 1162#L23-1 call #t~ret3 := fibo1(~n - 2);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(1 == ~n); 1123#L13 call #t~ret0 := fibo2(~n - 1);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#50#return; 1125#L13-1 call #t~ret1 := fibo2(~n - 2);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#48#return; 1274#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 1271#fibo2FINAL assume true; 1268#fibo2EXIT >#50#return; 1125#L13-1 [2018-11-18 14:35:53,048 INFO L796 eck$LassoCheckResult]: Loop: 1125#L13-1 call #t~ret1 := fibo2(~n - 2);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume !(~n < 1); 1183#L20 assume !(1 == ~n); 1122#L23 call #t~ret2 := fibo1(~n - 1);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(1 == ~n); 1123#L13 call #t~ret0 := fibo2(~n - 1);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume !(~n < 1); 1183#L20 assume !(1 == ~n); 1122#L23 call #t~ret2 := fibo1(~n - 1);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(1 == ~n); 1123#L13 call #t~ret0 := fibo2(~n - 1);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#50#return; 1125#L13-1 call #t~ret1 := fibo2(~n - 2);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#46#return; 1162#L23-1 call #t~ret3 := fibo1(~n - 2);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(1 == ~n); 1123#L13 call #t~ret0 := fibo2(~n - 1);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#50#return; 1125#L13-1 call #t~ret1 := fibo2(~n - 2);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#48#return; 1274#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 1271#fibo2FINAL assume true; 1268#fibo2EXIT >#50#return; 1125#L13-1 [2018-11-18 14:35:53,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash 376035563, now seen corresponding path program 1 times [2018-11-18 14:35:53,049 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:53,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:53,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:53,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-11-18 14:35:53,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:53,105 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:53,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:53,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-11-18 14:35:53,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 14:35:53,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-18 14:35:53,163 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 14:35:53,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash 36254641, now seen corresponding path program 1 times [2018-11-18 14:35:53,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:53,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:53,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:53,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-18 14:35:53,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:53,236 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:53,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:53,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-18 14:35:53,299 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 14:35:53,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-18 14:35:53,299 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 14:35:53,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 14:35:53,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 14:35:53,300 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 6 states. [2018-11-18 14:35:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:35:53,325 INFO L93 Difference]: Finished difference Result 184 states and 236 transitions. [2018-11-18 14:35:53,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 14:35:53,326 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 184 states and 236 transitions. [2018-11-18 14:35:53,327 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 14:35:53,329 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 184 states to 172 states and 222 transitions. [2018-11-18 14:35:53,329 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 110 [2018-11-18 14:35:53,329 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2018-11-18 14:35:53,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 172 states and 222 transitions. [2018-11-18 14:35:53,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:53,330 INFO L705 BuchiCegarLoop]: Abstraction has 172 states and 222 transitions. [2018-11-18 14:35:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states and 222 transitions. [2018-11-18 14:35:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2018-11-18 14:35:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-11-18 14:35:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 206 transitions. [2018-11-18 14:35:53,341 INFO L728 BuchiCegarLoop]: Abstraction has 158 states and 206 transitions. [2018-11-18 14:35:53,341 INFO L608 BuchiCegarLoop]: Abstraction has 158 states and 206 transitions. [2018-11-18 14:35:53,341 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-18 14:35:53,341 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 158 states and 206 transitions. [2018-11-18 14:35:53,343 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 14:35:53,344 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:53,344 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:53,346 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-11-18 14:35:53,346 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-11-18 14:35:53,346 INFO L794 eck$LassoCheckResult]: Stem: 1925#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1919#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 1894#L37 call main_#t~ret4 := fibo1(main_~x~0);< 1900#fibo1ENTRY ~n := #in~n; 1932#L8 assume !(~n < 1); 1893#L10 assume !(1 == ~n); 1895#L13 call #t~ret0 := fibo2(~n - 1);< 1909#fibo2ENTRY ~n := #in~n; 1927#L18 assume !(~n < 1); 1934#L20 assume !(1 == ~n); 1915#L23 call #t~ret2 := fibo1(~n - 1);< 1881#fibo1ENTRY ~n := #in~n; 1923#L8 assume !(~n < 1); 1968#L10 assume !(1 == ~n); 1879#L13 call #t~ret0 := fibo2(~n - 1);< 1963#fibo2ENTRY ~n := #in~n; 1967#L18 assume !(~n < 1); 1965#L20 assume !(1 == ~n); 1878#L23 call #t~ret2 := fibo1(~n - 1);< 1881#fibo1ENTRY ~n := #in~n; 1923#L8 assume !(~n < 1); 1968#L10 assume !(1 == ~n); 1879#L13 call #t~ret0 := fibo2(~n - 1);< 1963#fibo2ENTRY ~n := #in~n; 1967#L18 assume !(~n < 1); 1965#L20 assume 1 == ~n;#res := 1; 1962#fibo2FINAL assume true; 1930#fibo2EXIT >#50#return; 1880#L13-1 call #t~ret1 := fibo2(~n - 2);< 1916#fibo2ENTRY ~n := #in~n; 2012#L18 assume !(~n < 1); 2011#L20 assume !(1 == ~n); 1878#L23 call #t~ret2 := fibo1(~n - 1);< 1881#fibo1ENTRY ~n := #in~n; 1924#L8 assume !(~n < 1); 1971#L10 assume 1 == ~n;#res := 1; 1970#fibo1FINAL assume true; 1969#fibo1EXIT >#46#return; 1891#L23-1 call #t~ret3 := fibo1(~n - 2);< 1899#fibo1ENTRY ~n := #in~n; 1959#L8 assume !(~n < 1); 1957#L10 assume !(1 == ~n); 1898#L13 call #t~ret0 := fibo2(~n - 1);< 1955#fibo2ENTRY ~n := #in~n; 1953#L18 assume !(~n < 1); 1947#L20 assume 1 == ~n;#res := 1; 1948#fibo2FINAL assume true; 1928#fibo2EXIT >#50#return; 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume ~n < 1;#res := 0; 1937#fibo2FINAL assume true; 2018#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#48#return; 2006#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 1993#fibo2FINAL assume true; 1987#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#46#return; 1991#L23-1 call #t~ret3 := fibo1(~n - 2);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(1 == ~n); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume 1 == ~n;#res := 1; 2005#fibo2FINAL assume true; 2004#fibo2EXIT >#50#return; 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume ~n < 1;#res := 0; 1937#fibo2FINAL assume true; 2018#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#48#return; 2006#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 1993#fibo2FINAL assume true; 1987#fibo2EXIT >#50#return; 1929#L13-1 [2018-11-18 14:35:53,346 INFO L796 eck$LassoCheckResult]: Loop: 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume !(1 == ~n); 1990#L23 call #t~ret2 := fibo1(~n - 1);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(1 == ~n); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume !(1 == ~n); 1990#L23 call #t~ret2 := fibo1(~n - 1);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(1 == ~n); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume 1 == ~n;#res := 1; 2005#fibo2FINAL assume true; 2004#fibo2EXIT >#50#return; 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume ~n < 1;#res := 0; 1937#fibo2FINAL assume true; 2018#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#46#return; 1991#L23-1 call #t~ret3 := fibo1(~n - 2);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(1 == ~n); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume 1 == ~n;#res := 1; 2005#fibo2FINAL assume true; 2004#fibo2EXIT >#50#return; 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume ~n < 1;#res := 0; 1937#fibo2FINAL assume true; 2018#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#48#return; 2006#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 1993#fibo2FINAL assume true; 1987#fibo2EXIT >#50#return; 1929#L13-1 [2018-11-18 14:35:53,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:53,347 INFO L82 PathProgramCache]: Analyzing trace with hash 821073247, now seen corresponding path program 2 times [2018-11-18 14:35:53,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:53,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:53,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:53,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 31 proven. 84 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-18 14:35:53,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:53,475 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:53,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 14:35:53,495 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 14:35:53,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:35:53,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 31 proven. 84 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-18 14:35:53,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 14:35:53,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 14:35:53,526 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 14:35:53,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:53,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1445694181, now seen corresponding path program 1 times [2018-11-18 14:35:53,526 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:53,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:53,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:35:53,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-18 14:35:53,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:53,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:53,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:53,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-18 14:35:53,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 14:35:53,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2018-11-18 14:35:53,696 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 14:35:53,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 14:35:53,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-11-18 14:35:53,696 INFO L87 Difference]: Start difference. First operand 158 states and 206 transitions. cyclomatic complexity: 53 Second operand 13 states. [2018-11-18 14:35:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:35:53,918 INFO L93 Difference]: Finished difference Result 209 states and 285 transitions. [2018-11-18 14:35:53,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 14:35:53,919 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 209 states and 285 transitions. [2018-11-18 14:35:53,921 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 30 [2018-11-18 14:35:53,924 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 209 states to 209 states and 285 transitions. [2018-11-18 14:35:53,924 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 139 [2018-11-18 14:35:53,925 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2018-11-18 14:35:53,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 209 states and 285 transitions. [2018-11-18 14:35:53,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:53,927 INFO L705 BuchiCegarLoop]: Abstraction has 209 states and 285 transitions. [2018-11-18 14:35:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states and 285 transitions. [2018-11-18 14:35:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2018-11-18 14:35:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-18 14:35:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 263 transitions. [2018-11-18 14:35:53,938 INFO L728 BuchiCegarLoop]: Abstraction has 192 states and 263 transitions. [2018-11-18 14:35:53,938 INFO L608 BuchiCegarLoop]: Abstraction has 192 states and 263 transitions. [2018-11-18 14:35:53,938 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-18 14:35:53,938 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 192 states and 263 transitions. [2018-11-18 14:35:53,941 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 30 [2018-11-18 14:35:53,941 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:53,941 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:53,942 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:53,942 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:53,942 INFO L794 eck$LassoCheckResult]: Stem: 2745#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 2738#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 2708#L37 call main_#t~ret4 := fibo1(main_~x~0);< 2709#fibo1ENTRY ~n := #in~n; 2785#L8 assume !(~n < 1); 2784#L10 assume !(1 == ~n); 2727#L13 call #t~ret0 := fibo2(~n - 1);< 2728#fibo2ENTRY ~n := #in~n; 2747#L18 assume !(~n < 1); 2753#L20 assume !(1 == ~n); 2732#L23 call #t~ret2 := fibo1(~n - 1);< 2840#fibo1ENTRY ~n := #in~n; 2841#L8 assume !(~n < 1); 2838#L10 assume !(1 == ~n); 2698#L13 call #t~ret0 := fibo2(~n - 1);< 2781#fibo2ENTRY ~n := #in~n; 2845#L18 assume !(~n < 1); 2844#L20 assume 1 == ~n;#res := 1; 2697#fibo2FINAL assume true; 2699#fibo2EXIT >#50#return; 2693#L13-1 call #t~ret1 := fibo2(~n - 2);< 2734#fibo2ENTRY ~n := #in~n; 2846#L18 assume !(~n < 1); 2752#L20 assume !(1 == ~n); 2691#L23 call #t~ret2 := fibo1(~n - 1);< 2694#fibo1ENTRY ~n := #in~n; 2743#L8 assume !(~n < 1); 2707#L10 assume !(1 == ~n); 2692#L13 call #t~ret0 := fibo2(~n - 1);< 2787#fibo2ENTRY ~n := #in~n; 2786#L18 assume !(~n < 1); 2783#L20 assume !(1 == ~n); 2691#L23 call #t~ret2 := fibo1(~n - 1);< 2694#fibo1ENTRY ~n := #in~n; 2744#L8 assume !(~n < 1); 2790#L10 assume 1 == ~n;#res := 1; 2789#fibo1FINAL assume true; 2788#fibo1EXIT >#46#return; 2741#L23-1 call #t~ret3 := fibo1(~n - 2);< 2739#fibo1ENTRY ~n := #in~n; 2742#L8 assume ~n < 1;#res := 0; 2875#fibo1FINAL assume true; 2825#fibo1EXIT >#48#return; 2821#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 2820#fibo2FINAL assume true; 2810#fibo2EXIT >#50#return; 2807#L13-1 [2018-11-18 14:35:53,943 INFO L796 eck$LassoCheckResult]: Loop: 2807#L13-1 call #t~ret1 := fibo2(~n - 2);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume !(~n < 1); 2862#L20 assume !(1 == ~n); 2813#L23 call #t~ret2 := fibo1(~n - 1);< 2834#fibo1ENTRY ~n := #in~n; 2831#L8 assume !(~n < 1); 2829#L10 assume !(1 == ~n); 2808#L13 call #t~ret0 := fibo2(~n - 1);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume !(~n < 1); 2862#L20 assume !(1 == ~n); 2813#L23 call #t~ret2 := fibo1(~n - 1);< 2834#fibo1ENTRY ~n := #in~n; 2831#L8 assume !(~n < 1); 2829#L10 assume !(1 == ~n); 2808#L13 call #t~ret0 := fibo2(~n - 1);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume !(~n < 1); 2862#L20 assume 1 == ~n;#res := 1; 2848#fibo2FINAL assume true; 2823#fibo2EXIT >#50#return; 2807#L13-1 call #t~ret1 := fibo2(~n - 2);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume ~n < 1;#res := 0; 2851#fibo2FINAL assume true; 2849#fibo2EXIT >#52#return; 2809#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 2860#fibo1FINAL assume true; 2836#fibo1EXIT >#46#return; 2815#L23-1 call #t~ret3 := fibo1(~n - 2);< 2834#fibo1ENTRY ~n := #in~n; 2831#L8 assume ~n < 1;#res := 0; 2832#fibo1FINAL assume true; 2861#fibo1EXIT >#48#return; 2827#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 2819#fibo2FINAL assume true; 2806#fibo2EXIT >#50#return; 2807#L13-1 [2018-11-18 14:35:53,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:53,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1519288695, now seen corresponding path program 1 times [2018-11-18 14:35:53,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:53,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:53,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:53,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 14:35:53,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:53,983 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:53,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:53,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-18 14:35:54,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 14:35:54,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-18 14:35:54,080 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 14:35:54,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:54,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1513837346, now seen corresponding path program 1 times [2018-11-18 14:35:54,080 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:54,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:54,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:54,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:54,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 14:35:54,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:54,137 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:54,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:54,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 14:35:54,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 14:35:54,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-11-18 14:35:54,221 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 14:35:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 14:35:54,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-18 14:35:54,222 INFO L87 Difference]: Start difference. First operand 192 states and 263 transitions. cyclomatic complexity: 78 Second operand 11 states. [2018-11-18 14:35:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:35:54,306 INFO L93 Difference]: Finished difference Result 229 states and 318 transitions. [2018-11-18 14:35:54,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 14:35:54,306 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 229 states and 318 transitions. [2018-11-18 14:35:54,309 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 32 [2018-11-18 14:35:54,312 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 229 states to 229 states and 318 transitions. [2018-11-18 14:35:54,312 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2018-11-18 14:35:54,312 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-11-18 14:35:54,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 229 states and 318 transitions. [2018-11-18 14:35:54,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:54,313 INFO L705 BuchiCegarLoop]: Abstraction has 229 states and 318 transitions. [2018-11-18 14:35:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states and 318 transitions. [2018-11-18 14:35:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 211. [2018-11-18 14:35:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-11-18 14:35:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 293 transitions. [2018-11-18 14:35:54,327 INFO L728 BuchiCegarLoop]: Abstraction has 211 states and 293 transitions. [2018-11-18 14:35:54,327 INFO L608 BuchiCegarLoop]: Abstraction has 211 states and 293 transitions. [2018-11-18 14:35:54,327 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-18 14:35:54,328 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 211 states and 293 transitions. [2018-11-18 14:35:54,329 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 32 [2018-11-18 14:35:54,329 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:54,329 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:54,333 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:54,333 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:54,333 INFO L794 eck$LassoCheckResult]: Stem: 3439#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3438#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 3395#L37 call main_#t~ret4 := fibo1(main_~x~0);< 3396#fibo1ENTRY ~n := #in~n; 3496#L8 assume !(~n < 1); 3497#L10 assume !(1 == ~n); 3427#L13 call #t~ret0 := fibo2(~n - 1);< 3428#fibo2ENTRY ~n := #in~n; 3464#L18 assume !(~n < 1); 3465#L20 assume !(1 == ~n); 3403#L23 call #t~ret2 := fibo1(~n - 1);< 3441#fibo1ENTRY ~n := #in~n; 3443#L8 assume !(~n < 1); 3401#L10 assume !(1 == ~n); 3404#L13 call #t~ret0 := fibo2(~n - 1);< 3447#fibo2ENTRY ~n := #in~n; 3448#L18 assume !(~n < 1); 3540#L20 assume 1 == ~n;#res := 1; 3407#fibo2FINAL assume true; 3408#fibo2EXIT >#50#return; 3392#L13-1 call #t~ret1 := fibo2(~n - 2);< 3434#fibo2ENTRY ~n := #in~n; 3514#L18 assume !(~n < 1); 3460#L20 assume !(1 == ~n); 3391#L23 call #t~ret2 := fibo1(~n - 1);< 3394#fibo1ENTRY ~n := #in~n; 3455#L8 assume !(~n < 1); 3456#L10 assume !(1 == ~n); 3393#L13 call #t~ret0 := fibo2(~n - 1);< 3486#fibo2ENTRY ~n := #in~n; 3503#L18 assume !(~n < 1); 3502#L20 assume !(1 == ~n); 3391#L23 call #t~ret2 := fibo1(~n - 1);< 3394#fibo1ENTRY ~n := #in~n; 3442#L8 assume !(~n < 1); 3510#L10 assume 1 == ~n;#res := 1; 3511#fibo1FINAL assume true; 3578#fibo1EXIT >#46#return; 3494#L23-1 call #t~ret3 := fibo1(~n - 2);< 3576#fibo1ENTRY ~n := #in~n; 3593#L8 assume ~n < 1;#res := 0; 3582#fibo1FINAL assume true; 3574#fibo1EXIT >#48#return; 3572#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 3569#fibo2FINAL assume true; 3549#fibo2EXIT >#50#return; 3516#L13-1 [2018-11-18 14:35:54,333 INFO L796 eck$LassoCheckResult]: Loop: 3516#L13-1 call #t~ret1 := fibo2(~n - 2);< 3546#fibo2ENTRY ~n := #in~n; 3544#L18 assume !(~n < 1); 3541#L20 assume !(1 == ~n); 3530#L23 call #t~ret2 := fibo1(~n - 1);< 3538#fibo1ENTRY ~n := #in~n; 3555#L8 assume !(~n < 1); 3547#L10 assume !(1 == ~n); 3537#L13 call #t~ret0 := fibo2(~n - 1);< 3546#fibo2ENTRY ~n := #in~n; 3544#L18 assume !(~n < 1); 3541#L20 assume !(1 == ~n); 3530#L23 call #t~ret2 := fibo1(~n - 1);< 3538#fibo1ENTRY ~n := #in~n; 3555#L8 assume !(~n < 1); 3547#L10 assume 1 == ~n;#res := 1; 3548#fibo1FINAL assume true; 3561#fibo1EXIT >#46#return; 3531#L23-1 call #t~ret3 := fibo1(~n - 2);< 3538#fibo1ENTRY ~n := #in~n; 3555#L8 assume ~n < 1;#res := 0; 3556#fibo1FINAL assume true; 3559#fibo1EXIT >#48#return; 3560#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 3564#fibo2FINAL assume true; 3552#fibo2EXIT >#50#return; 3516#L13-1 [2018-11-18 14:35:54,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:54,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1519288695, now seen corresponding path program 2 times [2018-11-18 14:35:54,334 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:54,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:54,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:54,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:54,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 14:35:54,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:54,367 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:54,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 14:35:54,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 14:35:54,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:35:54,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-18 14:35:54,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 14:35:54,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-18 14:35:54,479 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 14:35:54,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:54,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1626884941, now seen corresponding path program 1 times [2018-11-18 14:35:54,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:54,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:54,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:54,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:35:54,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:54,670 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:54,670 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:54,670 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:54,670 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:54,670 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 14:35:54,671 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:54,671 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:54,671 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:54,671 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration7_Loop [2018-11-18 14:35:54,671 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:54,671 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:54,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:54,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:54,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:54,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:54,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:54,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:54,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:54,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:54,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:54,710 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:54,710 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:54,715 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:54,715 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:54,722 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:54,722 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret0=1} Honda state: {fibo1_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:54,747 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:54,747 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:54,749 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:54,749 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:54,765 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:54,765 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:54,767 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:54,767 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:54,783 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:54,783 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:54,785 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:54,785 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:54,800 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:54,800 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:54,818 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 14:35:54,818 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:55,237 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 14:35:55,239 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:55,239 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:55,239 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:55,239 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:55,239 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 14:35:55,239 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:55,239 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:55,239 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:55,239 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration7_Loop [2018-11-18 14:35:55,239 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:55,239 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:55,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:55,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:55,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:55,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:55,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:55,253 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:55,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:55,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:55,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:55,280 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:55,280 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 14:35:55,280 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 [2018-11-18 14:35:55,281 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:55,283 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:55,283 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:55,283 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:55,283 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:55,283 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:55,283 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:55,284 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:55,284 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 [2018-11-18 14:35:55,285 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:55,285 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:55,285 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:55,285 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:55,285 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:55,285 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:55,285 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:55,286 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:55,286 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 [2018-11-18 14:35:55,286 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:55,286 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:55,286 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:55,287 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:55,287 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:55,287 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:55,287 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:55,288 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:55,288 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 [2018-11-18 14:35:55,289 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:55,289 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:55,289 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:55,289 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:55,289 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:55,289 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:55,289 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:55,290 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:55,291 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 [2018-11-18 14:35:55,291 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:55,291 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:55,291 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:55,291 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:55,291 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:55,292 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:55,292 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:55,294 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 14:35:55,295 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 14:35:55,295 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 14:35:55,296 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 14:35:55,296 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 14:35:55,296 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 14:35:55,296 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2018-11-18 14:35:55,296 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 14:35:55,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:55,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:55,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 14:35:55,519 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2018-11-18 14:35:55,520 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 211 states and 293 transitions. cyclomatic complexity: 89 Second operand 10 states. [2018-11-18 14:35:55,733 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 211 states and 293 transitions. cyclomatic complexity: 89. Second operand 10 states. Result 1106 states and 1518 transitions. Complement of second has 40 states. [2018-11-18 14:35:55,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-11-18 14:35:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 70 transitions. [2018-11-18 14:35:55,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 70 transitions. Stem has 46 letters. Loop has 26 letters. [2018-11-18 14:35:55,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:55,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 70 transitions. Stem has 72 letters. Loop has 26 letters. [2018-11-18 14:35:55,736 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:55,736 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 70 transitions. Stem has 46 letters. Loop has 52 letters. [2018-11-18 14:35:55,737 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:55,737 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1106 states and 1518 transitions. [2018-11-18 14:35:55,749 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 73 [2018-11-18 14:35:55,758 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1106 states to 890 states and 1248 transitions. [2018-11-18 14:35:55,758 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 431 [2018-11-18 14:35:55,759 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 442 [2018-11-18 14:35:55,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 890 states and 1248 transitions. [2018-11-18 14:35:55,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:55,759 INFO L705 BuchiCegarLoop]: Abstraction has 890 states and 1248 transitions. [2018-11-18 14:35:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states and 1248 transitions. [2018-11-18 14:35:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 830. [2018-11-18 14:35:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-11-18 14:35:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1162 transitions. [2018-11-18 14:35:55,786 INFO L728 BuchiCegarLoop]: Abstraction has 830 states and 1162 transitions. [2018-11-18 14:35:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 14:35:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-18 14:35:55,786 INFO L87 Difference]: Start difference. First operand 830 states and 1162 transitions. Second operand 14 states. [2018-11-18 14:35:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:35:55,954 INFO L93 Difference]: Finished difference Result 823 states and 1146 transitions. [2018-11-18 14:35:55,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 14:35:55,955 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 823 states and 1146 transitions. [2018-11-18 14:35:55,960 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 73 [2018-11-18 14:35:55,964 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 823 states to 793 states and 1106 transitions. [2018-11-18 14:35:55,965 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 409 [2018-11-18 14:35:55,965 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 409 [2018-11-18 14:35:55,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 793 states and 1106 transitions. [2018-11-18 14:35:55,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:55,966 INFO L705 BuchiCegarLoop]: Abstraction has 793 states and 1106 transitions. [2018-11-18 14:35:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states and 1106 transitions. [2018-11-18 14:35:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 728. [2018-11-18 14:35:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 728 states. [2018-11-18 14:35:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1025 transitions. [2018-11-18 14:35:55,981 INFO L728 BuchiCegarLoop]: Abstraction has 728 states and 1025 transitions. [2018-11-18 14:35:55,981 INFO L608 BuchiCegarLoop]: Abstraction has 728 states and 1025 transitions. [2018-11-18 14:35:55,981 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-18 14:35:55,981 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 728 states and 1025 transitions. [2018-11-18 14:35:55,984 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 73 [2018-11-18 14:35:55,984 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:55,984 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:55,985 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:55,985 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:55,985 INFO L794 eck$LassoCheckResult]: Stem: 6892#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6886#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 6850#L37 call main_#t~ret4 := fibo1(main_~x~0);< 6851#fibo1ENTRY ~n := #in~n; 6970#L8 assume !(~n < 1); 6969#L10 assume !(1 == ~n); 6965#L13 call #t~ret0 := fibo2(~n - 1);< 6968#fibo2ENTRY ~n := #in~n; 6967#L18 assume !(~n < 1); 6966#L20 assume !(1 == ~n); 6939#L23 call #t~ret2 := fibo1(~n - 1);< 6964#fibo1ENTRY ~n := #in~n; 6962#L8 assume !(~n < 1); 6963#L10 assume !(1 == ~n); 6931#L13 call #t~ret0 := fibo2(~n - 1);< 6938#fibo2ENTRY ~n := #in~n; 6937#L18 assume !(~n < 1); 6936#L20 assume !(1 == ~n); 6883#L23 call #t~ret2 := fibo1(~n - 1);< 6935#fibo1ENTRY ~n := #in~n; 6950#L8 assume !(~n < 1); 6946#L10 assume 1 == ~n;#res := 1; 6943#fibo1FINAL assume true; 6944#fibo1EXIT >#46#return; 6921#L23-1 call #t~ret3 := fibo1(~n - 2);< 6932#fibo1ENTRY ~n := #in~n; 6926#L8 assume !(~n < 1); 6927#L10 assume !(1 == ~n); 6917#L13 call #t~ret0 := fibo2(~n - 1);< 6923#fibo2ENTRY ~n := #in~n; 6916#L18 assume !(~n < 1); 6918#L20 assume !(1 == ~n); 7006#L23 call #t~ret2 := fibo1(~n - 1);< 7187#fibo1ENTRY ~n := #in~n; 7188#L8 assume !(~n < 1); 7176#L10 assume !(1 == ~n); 7178#L13 call #t~ret0 := fibo2(~n - 1);< 7197#fibo2ENTRY [2018-11-18 14:35:55,985 INFO L796 eck$LassoCheckResult]: Loop: 7197#fibo2ENTRY ~n := #in~n; 7196#L18 assume !(~n < 1); 7194#L20 assume !(1 == ~n); 7183#L23 call #t~ret2 := fibo1(~n - 1);< 7190#fibo1ENTRY ~n := #in~n; 7182#L8 assume !(~n < 1); 7186#L10 assume !(1 == ~n); 7189#L13 call #t~ret0 := fibo2(~n - 1);< 7197#fibo2ENTRY [2018-11-18 14:35:55,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash 11031926, now seen corresponding path program 1 times [2018-11-18 14:35:55,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:55,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:55,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:55,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:55,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 14:35:56,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:56,064 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:56,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:56,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 14:35:56,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 14:35:56,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-11-18 14:35:56,208 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 14:35:56,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 2 times [2018-11-18 14:35:56,209 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:56,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:56,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:56,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:56,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:56,261 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:56,261 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:56,261 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:56,261 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:56,261 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 14:35:56,261 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,261 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:56,261 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:56,261 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration8_Loop [2018-11-18 14:35:56,261 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:56,261 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:56,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,300 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:56,300 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,301 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,301 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,303 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:56,303 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret1=0} Honda state: {fibo1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,318 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,318 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,320 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:56,320 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 34 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,335 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,335 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,337 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:56,337 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 35 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,352 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,352 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,354 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:56,354 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 36 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,370 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,370 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,374 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:56,374 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 37 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,389 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,389 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,391 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:56,391 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 38 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,406 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,407 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,408 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:56,408 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret0=0} Honda state: {fibo1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,424 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,424 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,426 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:56,426 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,441 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,441 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,443 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:56,443 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret3=0} Honda state: {fibo2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,458 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:56,458 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 42 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,475 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 14:35:56,475 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:56,516 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 14:35:56,517 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:56,517 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:56,517 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:56,517 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:56,517 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 14:35:56,517 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:56,517 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:56,517 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:56,517 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration8_Loop [2018-11-18 14:35:56,517 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:56,517 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:56,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,520 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,522 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,525 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:56,553 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:56,553 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 14:35:56,553 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 [2018-11-18 14:35:56,554 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:56,554 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:56,554 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:56,554 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:56,554 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:56,554 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:56,555 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:56,555 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:56,557 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 [2018-11-18 14:35:56,558 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:56,558 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:56,558 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:56,558 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:56,558 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:56,558 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:56,558 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:56,559 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:56,559 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 [2018-11-18 14:35:56,559 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:56,559 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:56,559 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:56,559 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:56,560 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:56,560 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:56,560 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:56,560 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:56,560 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 [2018-11-18 14:35:56,561 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:56,561 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:56,561 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:56,561 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:56,561 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:56,561 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:56,561 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:56,562 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:56,562 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 [2018-11-18 14:35:56,562 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:56,562 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:56,562 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:56,562 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:56,563 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:56,563 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:56,563 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:56,563 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:56,563 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 [2018-11-18 14:35:56,564 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:56,564 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:56,564 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:56,564 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:56,564 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:56,564 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:56,564 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:56,565 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:56,565 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 [2018-11-18 14:35:56,565 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:56,565 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:56,565 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:56,566 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:56,566 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:56,566 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:56,566 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:56,566 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:56,567 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 [2018-11-18 14:35:56,567 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:56,567 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:56,567 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:56,567 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:56,567 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:56,567 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:56,568 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:56,568 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:56,568 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 [2018-11-18 14:35:56,568 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:56,569 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:56,569 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:56,569 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:56,569 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:56,569 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:56,569 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:56,570 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 14:35:56,571 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 14:35:56,571 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 14:35:56,571 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 14:35:56,572 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 14:35:56,572 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 14:35:56,572 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2018-11-18 14:35:56,572 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 14:35:56,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:56,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:56,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:56,651 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 [2018-11-18 14:35:56,651 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 728 states and 1025 transitions. cyclomatic complexity: 318 Second operand 7 states. [2018-11-18 14:35:56,732 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 728 states and 1025 transitions. cyclomatic complexity: 318. Second operand 7 states. Result 852 states and 1156 transitions. Complement of second has 23 states. [2018-11-18 14:35:56,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 14:35:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2018-11-18 14:35:56,734 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 37 letters. Loop has 8 letters. [2018-11-18 14:35:56,734 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:56,734 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 45 letters. Loop has 8 letters. [2018-11-18 14:35:56,734 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:56,734 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 37 letters. Loop has 16 letters. [2018-11-18 14:35:56,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:56,735 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 852 states and 1156 transitions. [2018-11-18 14:35:56,742 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 64 [2018-11-18 14:35:56,749 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 852 states to 776 states and 1074 transitions. [2018-11-18 14:35:56,749 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 377 [2018-11-18 14:35:56,750 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 387 [2018-11-18 14:35:56,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 776 states and 1074 transitions. [2018-11-18 14:35:56,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:56,750 INFO L705 BuchiCegarLoop]: Abstraction has 776 states and 1074 transitions. [2018-11-18 14:35:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states and 1074 transitions. [2018-11-18 14:35:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 767. [2018-11-18 14:35:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-11-18 14:35:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1065 transitions. [2018-11-18 14:35:56,772 INFO L728 BuchiCegarLoop]: Abstraction has 767 states and 1065 transitions. [2018-11-18 14:35:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 14:35:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2018-11-18 14:35:56,773 INFO L87 Difference]: Start difference. First operand 767 states and 1065 transitions. Second operand 24 states. [2018-11-18 14:35:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:35:57,233 INFO L93 Difference]: Finished difference Result 309 states and 410 transitions. [2018-11-18 14:35:57,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 14:35:57,235 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 309 states and 410 transitions. [2018-11-18 14:35:57,238 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 27 [2018-11-18 14:35:57,241 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 309 states to 291 states and 387 transitions. [2018-11-18 14:35:57,241 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 210 [2018-11-18 14:35:57,241 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 211 [2018-11-18 14:35:57,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 291 states and 387 transitions. [2018-11-18 14:35:57,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:57,243 INFO L705 BuchiCegarLoop]: Abstraction has 291 states and 387 transitions. [2018-11-18 14:35:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states and 387 transitions. [2018-11-18 14:35:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 263. [2018-11-18 14:35:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-11-18 14:35:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 349 transitions. [2018-11-18 14:35:57,249 INFO L728 BuchiCegarLoop]: Abstraction has 263 states and 349 transitions. [2018-11-18 14:35:57,250 INFO L608 BuchiCegarLoop]: Abstraction has 263 states and 349 transitions. [2018-11-18 14:35:57,250 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-18 14:35:57,250 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 263 states and 349 transitions. [2018-11-18 14:35:57,251 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 27 [2018-11-18 14:35:57,251 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:57,251 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:57,252 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:57,252 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:57,252 INFO L794 eck$LassoCheckResult]: Stem: 9869#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 9864#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 9843#L37 call main_#t~ret4 := fibo1(main_~x~0);< 9844#fibo1ENTRY ~n := #in~n; 9873#L8 assume !(~n < 1); 9842#L10 assume !(1 == ~n); 9823#L13 call #t~ret0 := fibo2(~n - 1);< 9856#fibo2ENTRY ~n := #in~n; 9871#L18 assume !(~n < 1); 9877#L20 assume !(1 == ~n); 9822#L23 call #t~ret2 := fibo1(~n - 1);< 9824#fibo1ENTRY ~n := #in~n; 9929#L8 assume !(~n < 1); 9927#L10 assume !(1 == ~n); 9914#L13 call #t~ret0 := fibo2(~n - 1);< 9925#fibo2ENTRY ~n := #in~n; 9923#L18 assume !(~n < 1); 9921#L20 assume !(1 == ~n); 9896#L23 call #t~ret2 := fibo1(~n - 1);< 9909#fibo1ENTRY ~n := #in~n; 9910#L8 assume !(~n < 1); 10042#L10 assume !(1 == ~n); 10040#L13 call #t~ret0 := fibo2(~n - 1);< 10041#fibo2ENTRY ~n := #in~n; 10049#L18 assume !(~n < 1); 10048#L20 assume 1 == ~n;#res := 1; 10045#fibo2FINAL assume true; 10039#fibo2EXIT >#50#return; 10036#L13-1 call #t~ret1 := fibo2(~n - 2);< 10037#fibo2ENTRY ~n := #in~n; 10051#L18 assume ~n < 1;#res := 0; 10050#fibo2FINAL assume true; 10035#fibo2EXIT >#52#return; 10032#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 10028#fibo1FINAL assume true; 10026#fibo1EXIT >#46#return; 10023#L23-1 call #t~ret3 := fibo1(~n - 2);< 10025#fibo1ENTRY ~n := #in~n; 10038#L8 assume !(~n < 1); 10033#L10 assume 1 == ~n;#res := 1; 10029#fibo1FINAL assume true; 10022#fibo1EXIT >#48#return; 9992#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 10058#fibo2FINAL assume true; 9970#fibo2EXIT >#50#return; 9964#L13-1 call #t~ret1 := fibo2(~n - 2);< 9968#fibo2ENTRY [2018-11-18 14:35:57,252 INFO L796 eck$LassoCheckResult]: Loop: 9968#fibo2ENTRY ~n := #in~n; 9996#L18 assume !(~n < 1); 9994#L20 assume !(1 == ~n); 9951#L23 call #t~ret2 := fibo1(~n - 1);< 9958#fibo1ENTRY ~n := #in~n; 9978#L8 assume !(~n < 1); 9975#L10 assume !(1 == ~n); 9965#L13 call #t~ret0 := fibo2(~n - 1);< 9968#fibo2ENTRY [2018-11-18 14:35:57,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash -177678082, now seen corresponding path program 3 times [2018-11-18 14:35:57,252 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:57,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:57,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:57,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:35:57,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:57,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:57,261 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 3 times [2018-11-18 14:35:57,261 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:57,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:57,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:57,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:35:57,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:57,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:57,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1358906085, now seen corresponding path program 4 times [2018-11-18 14:35:57,265 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:57,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:57,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:57,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:35:57,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 14:35:57,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 14:35:57,360 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 14:35:57,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 14:35:57,382 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 14:35:57,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 14:35:57,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 14:35:57,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 14:35:57,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-18 14:35:57,474 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:57,474 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:57,474 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:57,474 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:57,474 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 14:35:57,474 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:57,474 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:57,474 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:57,474 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration9_Loop [2018-11-18 14:35:57,474 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:57,474 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:57,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,479 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,487 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,516 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:57,517 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 44 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:57,522 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:57,522 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:57,524 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:57,524 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret3=0} Honda state: {fibo2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:57,540 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:57,540 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:57,542 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:57,542 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:57,557 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:57,557 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:57,559 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:57,559 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 47 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:57,574 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:57,574 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:57,576 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:57,576 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret0=0} Honda state: {fibo1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 48 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:57,591 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:57,591 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:57,593 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:57,593 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:57,608 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:57,608 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 50 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:57,624 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 14:35:57,624 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:57,665 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 14:35:57,666 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:57,666 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:57,666 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:57,666 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:57,666 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 14:35:57,666 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:57,666 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:57,666 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:57,666 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration9_Loop [2018-11-18 14:35:57,666 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:57,666 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:57,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:57,703 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:57,703 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 14:35:57,703 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 [2018-11-18 14:35:57,703 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:57,703 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:57,704 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:57,704 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:57,704 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:57,704 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:57,704 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:57,704 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:57,705 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 [2018-11-18 14:35:57,705 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:57,705 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:57,705 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:57,705 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:57,705 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:57,705 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:57,706 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:57,706 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:57,706 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 [2018-11-18 14:35:57,706 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:57,706 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:57,707 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:57,707 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:57,707 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:57,707 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:57,707 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:57,707 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:57,707 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 [2018-11-18 14:35:57,708 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:57,708 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:57,708 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:57,708 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:57,708 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:57,708 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:57,708 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:57,709 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:57,709 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 [2018-11-18 14:35:57,709 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:57,709 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:57,709 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:57,709 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:57,710 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:57,710 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:57,710 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:57,710 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:57,710 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 [2018-11-18 14:35:57,711 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:57,711 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:57,711 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:57,711 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:57,711 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:57,711 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:57,711 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:57,712 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:57,712 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 [2018-11-18 14:35:57,712 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:57,712 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:57,712 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:57,712 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:57,712 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:57,713 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:57,713 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:57,713 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:57,713 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 [2018-11-18 14:35:57,714 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:57,714 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:57,714 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:57,714 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:57,714 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:57,714 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:57,714 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:57,715 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 14:35:57,716 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 14:35:57,716 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 14:35:57,717 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 14:35:57,717 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 14:35:57,717 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 14:35:57,717 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2018-11-18 14:35:57,717 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 14:35:57,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:57,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:57,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:57,827 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 [2018-11-18 14:35:57,827 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92 Second operand 7 states. [2018-11-18 14:35:57,924 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92. Second operand 7 states. Result 423 states and 540 transitions. Complement of second has 26 states. [2018-11-18 14:35:57,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 14:35:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2018-11-18 14:35:57,925 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 46 letters. Loop has 8 letters. [2018-11-18 14:35:57,925 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:57,926 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 14:35:57,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:57,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:57,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:58,023 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 [2018-11-18 14:35:58,023 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92 Second operand 7 states. [2018-11-18 14:35:58,169 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92. Second operand 7 states. Result 423 states and 540 transitions. Complement of second has 26 states. [2018-11-18 14:35:58,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 14:35:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2018-11-18 14:35:58,170 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 46 letters. Loop has 8 letters. [2018-11-18 14:35:58,170 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:58,170 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 14:35:58,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:58,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:58,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:58,258 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 [2018-11-18 14:35:58,258 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92 Second operand 7 states. [2018-11-18 14:35:58,364 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92. Second operand 7 states. Result 495 states and 641 transitions. Complement of second has 25 states. [2018-11-18 14:35:58,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 14:35:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2018-11-18 14:35:58,365 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 46 letters. Loop has 8 letters. [2018-11-18 14:35:58,365 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:58,366 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 54 letters. Loop has 8 letters. [2018-11-18 14:35:58,366 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:58,366 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 46 letters. Loop has 16 letters. [2018-11-18 14:35:58,366 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:58,366 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 641 transitions. [2018-11-18 14:35:58,370 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 55 [2018-11-18 14:35:58,373 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 380 states and 503 transitions. [2018-11-18 14:35:58,373 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 223 [2018-11-18 14:35:58,373 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-18 14:35:58,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 380 states and 503 transitions. [2018-11-18 14:35:58,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:58,373 INFO L705 BuchiCegarLoop]: Abstraction has 380 states and 503 transitions. [2018-11-18 14:35:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states and 503 transitions. [2018-11-18 14:35:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 353. [2018-11-18 14:35:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2018-11-18 14:35:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 455 transitions. [2018-11-18 14:35:58,382 INFO L728 BuchiCegarLoop]: Abstraction has 353 states and 455 transitions. [2018-11-18 14:35:58,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 14:35:58,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-11-18 14:35:58,382 INFO L87 Difference]: Start difference. First operand 353 states and 455 transitions. Second operand 14 states. [2018-11-18 14:35:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 14:35:58,541 INFO L93 Difference]: Finished difference Result 243 states and 301 transitions. [2018-11-18 14:35:58,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 14:35:58,543 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 243 states and 301 transitions. [2018-11-18 14:35:58,545 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-11-18 14:35:58,546 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 243 states to 208 states and 253 transitions. [2018-11-18 14:35:58,546 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2018-11-18 14:35:58,546 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 174 [2018-11-18 14:35:58,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 208 states and 253 transitions. [2018-11-18 14:35:58,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 14:35:58,546 INFO L705 BuchiCegarLoop]: Abstraction has 208 states and 253 transitions. [2018-11-18 14:35:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states and 253 transitions. [2018-11-18 14:35:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2018-11-18 14:35:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-18 14:35:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2018-11-18 14:35:58,550 INFO L728 BuchiCegarLoop]: Abstraction has 192 states and 230 transitions. [2018-11-18 14:35:58,550 INFO L608 BuchiCegarLoop]: Abstraction has 192 states and 230 transitions. [2018-11-18 14:35:58,550 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-11-18 14:35:58,550 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 192 states and 230 transitions. [2018-11-18 14:35:58,550 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-11-18 14:35:58,550 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 14:35:58,550 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 14:35:58,551 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:58,551 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 14:35:58,552 INFO L794 eck$LassoCheckResult]: Stem: 12868#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 12867#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 12842#L37 call main_#t~ret4 := fibo1(main_~x~0);< 12843#fibo1ENTRY ~n := #in~n; 12909#L8 assume !(~n < 1); 12910#L10 assume !(1 == ~n); 12856#L13 call #t~ret0 := fibo2(~n - 1);< 12857#fibo2ENTRY ~n := #in~n; 12913#L18 assume !(~n < 1); 12912#L20 assume !(1 == ~n); 12847#L23 call #t~ret2 := fibo1(~n - 1);< 12870#fibo1ENTRY ~n := #in~n; 12871#L8 assume !(~n < 1); 12846#L10 assume !(1 == ~n); 12848#L13 call #t~ret0 := fibo2(~n - 1);< 12902#fibo2ENTRY ~n := #in~n; 12899#L18 assume !(~n < 1); 12900#L20 assume !(1 == ~n); 12854#L23 call #t~ret2 := fibo1(~n - 1);< 12887#fibo1ENTRY ~n := #in~n; 12889#L8 assume !(~n < 1); 12907#L10 assume !(1 == ~n); 12852#L13 call #t~ret0 := fibo2(~n - 1);< 12855#fibo2ENTRY ~n := #in~n; 12993#L18 assume !(~n < 1); 12991#L20 assume 1 == ~n;#res := 1; 12990#fibo2FINAL assume true; 12989#fibo2EXIT >#50#return; 12858#L13-1 call #t~ret1 := fibo2(~n - 2);< 12859#fibo2ENTRY ~n := #in~n; 13003#L18 assume ~n < 1;#res := 0; 13001#fibo2FINAL assume true; 13000#fibo2EXIT >#52#return; 12998#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 12997#fibo1FINAL assume true; 12996#fibo1EXIT >#46#return; 12931#L23-1 call #t~ret3 := fibo1(~n - 2);< 12934#fibo1ENTRY ~n := #in~n; 13007#L8 assume !(~n < 1); 13006#L10 assume 1 == ~n;#res := 1; 12994#fibo1FINAL assume true; 12930#fibo1EXIT >#48#return; 12929#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 12927#fibo2FINAL assume true; 12926#fibo2EXIT >#50#return; 12831#L13-1 call #t~ret1 := fibo2(~n - 2);< 12925#fibo2ENTRY ~n := #in~n; 13004#L18 assume !(~n < 1); 13002#L20 assume !(1 == ~n); 12830#L23 call #t~ret2 := fibo1(~n - 1);< 12833#fibo1ENTRY ~n := #in~n; 12869#L8 assume !(~n < 1); 12844#L10 assume 1 == ~n;#res := 1; 12845#fibo1FINAL assume true; 12860#fibo1EXIT >#46#return; 12838#L23-1 call #t~ret3 := fibo1(~n - 2);< 12839#fibo1ENTRY ~n := #in~n; 13020#L8 assume ~n < 1;#res := 0; 13017#fibo1FINAL assume true; 12851#fibo1EXIT >#48#return; 12849#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret3;havoc #t~ret2; 12850#fibo2FINAL assume true; 12924#fibo2EXIT >#52#return; 12923#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 12922#fibo1FINAL assume true; 12921#fibo1EXIT >#46#return; 12865#L23-1 call #t~ret3 := fibo1(~n - 2);< 12890#fibo1ENTRY [2018-11-18 14:35:58,552 INFO L796 eck$LassoCheckResult]: Loop: 12890#fibo1ENTRY ~n := #in~n; 12891#L8 assume !(~n < 1); 12879#L10 assume !(1 == ~n); 12881#L13 call #t~ret0 := fibo2(~n - 1);< 12903#fibo2ENTRY ~n := #in~n; 12904#L18 assume !(~n < 1); 12959#L20 assume !(1 == ~n); 12864#L23 call #t~ret2 := fibo1(~n - 1);< 12890#fibo1ENTRY [2018-11-18 14:35:58,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:58,552 INFO L82 PathProgramCache]: Analyzing trace with hash 944778444, now seen corresponding path program 1 times [2018-11-18 14:35:58,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:58,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:58,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:58,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:35:58,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:58,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:58,564 INFO L82 PathProgramCache]: Analyzing trace with hash 181289832, now seen corresponding path program 4 times [2018-11-18 14:35:58,564 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:58,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:58,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:58,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 14:35:58,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:58,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:58,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1215722803, now seen corresponding path program 2 times [2018-11-18 14:35:58,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 14:35:58,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 14:35:58,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:58,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 14:35:58,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 14:35:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 14:35:58,649 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:58,649 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:58,650 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:58,650 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:58,650 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 14:35:58,650 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:58,650 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:58,650 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:58,650 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration10_Loop [2018-11-18 14:35:58,650 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:58,650 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:58,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,718 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:58,718 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 51 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:58,724 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:58,724 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:58,726 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:58,726 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret1=0} Honda state: {fibo1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 52 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:58,740 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:58,740 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:58,742 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:58,742 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 53 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:58,757 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:58,757 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:58,762 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:58,762 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 54 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:58,777 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:58,777 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:58,779 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:58,779 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:58,793 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:58,794 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:58,795 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 14:35:58,795 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 56 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:58,812 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 14:35:58,812 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d88d6a48-264c-4a4a-89e9-cf4675a5c620/bin-2019/uautomizer/z3 Starting monitored process 57 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:58,828 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 14:35:58,829 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 14:35:58,867 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 14:35:58,868 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 14:35:58,868 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 14:35:58,868 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 14:35:58,868 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 14:35:58,868 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 14:35:58,868 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 14:35:58,868 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 14:35:58,868 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 14:35:58,868 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_true-unreach-call_true-termination.c_Iteration10_Loop [2018-11-18 14:35:58,868 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 14:35:58,868 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 14:35:58,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,871 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 14:35:58,903 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 14:35:58,903 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 14:35:58,903 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 [2018-11-18 14:35:58,903 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:58,904 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:58,904 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:58,904 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:58,904 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:58,904 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:58,904 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:58,905 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:58,905 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 [2018-11-18 14:35:58,905 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:58,905 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:58,905 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:58,905 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:58,905 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:58,906 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:58,906 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:58,906 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:58,906 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 [2018-11-18 14:35:58,907 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:58,907 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:58,907 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:58,907 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:58,907 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:58,907 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:58,907 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:58,908 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:58,908 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 [2018-11-18 14:35:58,908 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:58,908 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:58,908 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:58,908 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:58,908 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:58,908 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:58,909 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:58,909 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:58,909 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 [2018-11-18 14:35:58,909 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:58,909 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:58,910 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:58,910 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:58,910 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:58,910 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:58,910 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:58,911 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 14:35:58,911 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 [2018-11-18 14:35:58,911 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 14:35:58,911 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 14:35:58,911 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 14:35:58,911 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 14:35:58,911 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 14:35:58,912 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 14:35:58,912 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 14:35:58,913 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 14:35:58,914 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 14:35:58,914 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 14:35:58,914 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 14:35:58,914 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 14:35:58,914 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 14:35:58,914 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2018-11-18 14:35:58,915 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 14:35:58,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:58,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:59,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:59,039 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 [2018-11-18 14:35:59,039 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42 Second operand 7 states. [2018-11-18 14:35:59,082 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42. Second operand 7 states. Result 200 states and 239 transitions. Complement of second has 7 states. [2018-11-18 14:35:59,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 14:35:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2018-11-18 14:35:59,085 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 67 letters. Loop has 8 letters. [2018-11-18 14:35:59,085 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:59,085 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 14:35:59,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:59,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:59,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:59,169 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 [2018-11-18 14:35:59,169 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42 Second operand 7 states. [2018-11-18 14:35:59,205 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42. Second operand 7 states. Result 200 states and 239 transitions. Complement of second has 7 states. [2018-11-18 14:35:59,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 14:35:59,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2018-11-18 14:35:59,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 67 letters. Loop has 8 letters. [2018-11-18 14:35:59,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:59,206 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 14:35:59,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 14:35:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:59,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 14:35:59,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 14:35:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 14:35:59,300 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 [2018-11-18 14:35:59,300 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42 Second operand 7 states. [2018-11-18 14:35:59,392 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42. Second operand 7 states. Result 266 states and 322 transitions. Complement of second has 23 states. [2018-11-18 14:35:59,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-11-18 14:35:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 14:35:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2018-11-18 14:35:59,393 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 67 letters. Loop has 8 letters. [2018-11-18 14:35:59,393 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:59,394 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 75 letters. Loop has 8 letters. [2018-11-18 14:35:59,394 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:59,394 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 67 letters. Loop has 16 letters. [2018-11-18 14:35:59,394 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 14:35:59,394 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 266 states and 322 transitions. [2018-11-18 14:35:59,396 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 14:35:59,396 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 266 states to 0 states and 0 transitions. [2018-11-18 14:35:59,396 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-18 14:35:59,396 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-18 14:35:59,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-18 14:35:59,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-18 14:35:59,397 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 14:35:59,397 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 14:35:59,397 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 14:35:59,397 INFO L442 BuchiCegarLoop]: ======== Iteration 11============ [2018-11-18 14:35:59,397 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-18 14:35:59,397 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 14:35:59,397 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-18 14:35:59,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 02:35:59 BoogieIcfgContainer [2018-11-18 14:35:59,403 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-18 14:35:59,403 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 14:35:59,403 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 14:35:59,403 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 14:35:59,404 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:35:50" (3/4) ... [2018-11-18 14:35:59,407 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 14:35:59,407 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 14:35:59,407 INFO L168 Benchmark]: Toolchain (without parser) took 9534.80 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 262.1 MB). Free memory was 961.9 MB in the beginning and 1.2 GB in the end (delta: -266.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 14:35:59,408 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 14:35:59,408 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.96 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 14:35:59,409 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.83 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 14:35:59,409 INFO L168 Benchmark]: Boogie Preprocessor took 9.76 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. [2018-11-18 14:35:59,409 INFO L168 Benchmark]: RCFGBuilder took 167.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -176.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2018-11-18 14:35:59,410 INFO L168 Benchmark]: BuchiAutomizer took 9186.76 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 125.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -105.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2018-11-18 14:35:59,410 INFO L168 Benchmark]: Witness Printer took 3.63 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 14:35:59,412 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 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 147.96 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 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 16.83 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.76 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 167.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -176.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 9186.76 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 125.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -105.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * Witness Printer took 3.63 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 14 terminating modules (8 trivial, 4 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 9 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 9.1s and 11 iterations. TraceHistogramMax:8. Analysis of lassos took 5.2s. Construction of modules took 1.1s. Büchi inclusion checks took 2.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 13. Automata minimization 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 299 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 728 states and ocurred in iteration 7. Nontrivial modules had stage [4, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 4/16 HoareTripleCheckerStatistics: 398 SDtfs, 870 SDslu, 1056 SDs, 0 SdLazy, 2173 SolverSat, 436 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT1 SILN0 SILU0 SILI4 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq184 hnf93 smp76 dnf100 smp100 tf111 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 7ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 34 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...