./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7_false-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_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:57:23,721 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 08:57:23,723 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 08:57:23,733 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 08:57:23,734 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 08:57:23,734 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 08:57:23,735 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 08:57:23,737 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 08:57:23,738 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 08:57:23,739 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 08:57:23,740 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 08:57:23,740 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 08:57:23,741 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 08:57:23,742 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 08:57:23,742 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 08:57:23,743 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 08:57:23,744 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 08:57:23,745 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 08:57:23,747 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 08:57:23,748 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 08:57:23,749 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 08:57:23,750 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 08:57:23,752 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 08:57:23,752 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 08:57:23,752 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 08:57:23,753 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 08:57:23,754 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 08:57:23,754 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 08:57:23,755 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 08:57:23,756 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 08:57:23,756 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 08:57:23,757 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 08:57:23,757 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 08:57:23,757 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 08:57:23,758 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 08:57:23,758 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 08:57:23,759 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-18 08:57:23,771 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 08:57:23,771 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 08:57:23,772 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 08:57:23,772 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 08:57:23,772 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 08:57:23,772 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-18 08:57:23,773 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-18 08:57:23,773 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-18 08:57:23,773 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-18 08:57:23,773 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-18 08:57:23,773 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-18 08:57:23,773 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 08:57:23,774 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 08:57:23,774 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 08:57:23,774 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 08:57:23,774 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 08:57:23,774 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 08:57:23,774 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-18 08:57:23,774 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-18 08:57:23,775 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-18 08:57:23,775 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 08:57:23,775 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 08:57:23,775 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-18 08:57:23,775 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 08:57:23,775 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-18 08:57:23,776 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 08:57:23,776 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 08:57:23,776 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-18 08:57:23,776 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 08:57:23,776 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 08:57:23,776 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-18 08:57:23,777 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-18 08:57:23,777 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_18e4ad64-34ed-496d-92fd-17132c0ce670/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 -> 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 [2018-11-18 08:57:23,804 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 08:57:23,816 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 08:57:23,820 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 08:57:23,821 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 08:57:23,822 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 08:57:23,822 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c [2018-11-18 08:57:23,878 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/data/ac17b1d83/8ce5b3804a904c799cfe41eab37b0a75/FLAG4a90e9dd2 [2018-11-18 08:57:24,246 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 08:57:24,247 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/sv-benchmarks/c/recursive-simple/fibo_7_false-unreach-call_true-termination.c [2018-11-18 08:57:24,252 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/data/ac17b1d83/8ce5b3804a904c799cfe41eab37b0a75/FLAG4a90e9dd2 [2018-11-18 08:57:24,262 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/data/ac17b1d83/8ce5b3804a904c799cfe41eab37b0a75 [2018-11-18 08:57:24,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 08:57:24,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 08:57:24,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 08:57:24,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 08:57:24,271 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 08:57:24,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f35898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24, skipping insertion in model container [2018-11-18 08:57:24,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 08:57:24,295 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 08:57:24,414 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 08:57:24,416 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 08:57:24,427 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 08:57:24,438 INFO L195 MainTranslator]: Completed translation [2018-11-18 08:57:24,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24 WrapperNode [2018-11-18 08:57:24,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 08:57:24,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 08:57:24,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 08:57:24,439 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 08:57:24,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 08:57:24,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 08:57:24,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 08:57:24,471 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 08:57:24,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... [2018-11-18 08:57:24,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 08:57:24,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 08:57:24,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 08:57:24,489 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 08:57:24,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 08:57:24,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 08:57:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-18 08:57:24,591 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-18 08:57:24,701 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 08:57:24,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:57:24 BoogieIcfgContainer [2018-11-18 08:57:24,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 08:57:24,702 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-18 08:57:24,702 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-18 08:57:24,706 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-18 08:57:24,707 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 08:57:24,707 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 08:57:24" (1/3) ... [2018-11-18 08:57:24,708 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@730ee6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 08:57:24, skipping insertion in model container [2018-11-18 08:57:24,708 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 08:57:24,708 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:24" (2/3) ... [2018-11-18 08:57:24,709 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@730ee6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 08:57:24, skipping insertion in model container [2018-11-18 08:57:24,709 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 08:57:24,709 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:57:24" (3/3) ... [2018-11-18 08:57:24,711 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_7_false-unreach-call_true-termination.c [2018-11-18 08:57:24,772 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 08:57:24,773 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-18 08:57:24,773 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-18 08:57:24,773 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-18 08:57:24,773 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 08:57:24,774 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 08:57:24,774 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-18 08:57:24,774 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 08:57:24,774 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-18 08:57:24,790 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-11-18 08:57:24,816 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:57:24,817 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:57:24,817 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:57:24,825 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 08:57:24,825 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-18 08:57:24,825 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-18 08:57:24,825 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-11-18 08:57:24,827 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:57:24,827 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:57:24,828 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:57:24,828 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 08:57:24,828 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-18 08:57:24,838 INFO L794 eck$LassoCheckResult]: Stem: 9#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 20#L25true call main_#t~ret2 := fibo(main_~x~0);< 12#fiboENTRYtrue [2018-11-18 08:57:24,838 INFO L796 eck$LassoCheckResult]: Loop: 12#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 11#L8true assume !(1 == ~n); 19#L11true call #t~ret0 := fibo(~n - 1);< 12#fiboENTRYtrue [2018-11-18 08:57:24,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:24,844 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2018-11-18 08:57:24,846 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:24,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:24,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:24,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:24,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:24,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:24,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2018-11-18 08:57:24,932 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:24,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:24,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:24,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:24,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:24,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:24,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2018-11-18 08:57:24,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:24,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:24,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:24,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:24,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:25,032 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:25,033 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:25,034 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:25,034 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:25,034 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 08:57:25,034 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:25,034 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:25,034 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:25,034 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-18 08:57:25,035 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:25,035 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:25,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 08:57:25,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 08:57:25,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 08:57:25,063 INFO 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 08:57:25,067 INFO 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 08:57:25,145 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:25,146 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:25,155 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:25,155 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:25,162 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:57:25,162 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:25,192 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:25,192 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:25,195 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:57:25,195 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:25,216 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:25,216 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:25,219 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:57:25,219 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:25,247 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:25,248 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:25,250 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:57:25,250 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:25,270 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:25,270 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:25,292 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 08:57:25,292 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:25,314 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 08:57:25,315 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:25,315 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:25,315 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:25,315 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:25,315 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 08:57:25,316 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:25,316 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:25,316 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:25,316 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-18 08:57:25,316 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:25,316 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:25,317 INFO 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 08:57:25,324 INFO 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 08:57:25,326 INFO 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 08:57:25,328 INFO 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 08:57:25,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 08:57:25,378 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:25,384 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 08:57:25,386 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 08:57:25,387 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:25,387 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:25,388 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:25,388 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:25,388 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:25,390 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:25,391 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:25,395 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:57:25,396 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 08:57:25,397 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:25,397 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:25,397 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:25,397 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:25,397 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:25,398 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:25,398 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:25,399 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:57:25,400 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 08:57:25,400 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:25,400 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:25,400 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:25,401 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:25,401 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:25,401 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:25,401 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:25,403 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:57:25,403 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 08:57:25,404 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:25,404 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:25,404 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:25,404 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:25,404 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:25,405 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:25,405 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:25,409 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:57:25,409 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 08:57:25,410 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:25,410 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:25,410 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:25,410 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:25,411 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:25,411 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:25,412 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:25,420 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 08:57:25,424 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 08:57:25,426 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 08:57:25,428 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 08:57:25,428 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 08:57:25,428 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 08:57:25,429 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-18 08:57:25,430 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 08:57:25,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:25,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:25,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:25,538 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 08:57:25,556 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-18 08:57:25,557 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states. Second operand 4 states. [2018-11-18 08:57:25,668 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states.. Second operand 4 states. Result 48 states and 60 transitions. Complement of second has 12 states. [2018-11-18 08:57:25,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-18 08:57:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2018-11-18 08:57:25,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2018-11-18 08:57:25,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:25,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2018-11-18 08:57:25,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:25,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2018-11-18 08:57:25,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:25,675 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2018-11-18 08:57:25,680 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:57:25,687 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2018-11-18 08:57:25,688 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-11-18 08:57:25,689 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2018-11-18 08:57:25,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2018-11-18 08:57:25,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:25,690 INFO L705 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2018-11-18 08:57:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2018-11-18 08:57:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-11-18 08:57:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 08:57:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2018-11-18 08:57:25,721 INFO L728 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-11-18 08:57:25,721 INFO L608 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-11-18 08:57:25,721 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-18 08:57:25,721 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2018-11-18 08:57:25,722 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:57:25,722 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:57:25,722 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:57:25,723 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:57:25,723 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:57:25,723 INFO L794 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 125#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 126#L25 call main_#t~ret2 := fibo(main_~x~0);< 131#fiboENTRY ~n := #in~n; 132#L6 assume !(~n < 1); 130#L8 assume !(1 == ~n); 123#L11 call #t~ret0 := fibo(~n - 1);< 133#fiboENTRY ~n := #in~n; 134#L6 assume ~n < 1;#res := 0; 129#fiboFINAL assume true; 122#fiboEXIT >#33#return; 124#L11-1 [2018-11-18 08:57:25,723 INFO L796 eck$LassoCheckResult]: Loop: 124#L11-1 call #t~ret1 := fibo(~n - 2);< 138#fiboENTRY ~n := #in~n; 141#L6 assume !(~n < 1); 140#L8 assume !(1 == ~n); 136#L11 call #t~ret0 := fibo(~n - 1);< 138#fiboENTRY ~n := #in~n; 141#L6 assume ~n < 1;#res := 0; 137#fiboFINAL assume true; 139#fiboEXIT >#33#return; 124#L11-1 [2018-11-18 08:57:25,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2018-11-18 08:57:25,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:25,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:25,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:25,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:25,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:25,792 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 08:57:25,794 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 08:57:25,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 08:57:25,796 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 08:57:25,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2018-11-18 08:57:25,797 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:25,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:25,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:25,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:25,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 08:57:25,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 08:57:25,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 08:57:25,840 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 08:57:25,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 08:57:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 08:57:25,844 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-18 08:57:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:57:25,932 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-11-18 08:57:25,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 08:57:25,933 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2018-11-18 08:57:25,935 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:57:25,936 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2018-11-18 08:57:25,936 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2018-11-18 08:57:25,936 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2018-11-18 08:57:25,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2018-11-18 08:57:25,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:25,937 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-11-18 08:57:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2018-11-18 08:57:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 08:57:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 08:57:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2018-11-18 08:57:25,941 INFO L728 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-11-18 08:57:25,941 INFO L608 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-11-18 08:57:25,941 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-18 08:57:25,941 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2018-11-18 08:57:25,942 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:57:25,942 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:57:25,943 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:57:25,943 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:57:25,943 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-18 08:57:25,944 INFO L794 eck$LassoCheckResult]: Stem: 192#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 190#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 191#L25 call main_#t~ret2 := fibo(main_~x~0);< 196#fiboENTRY ~n := #in~n; 197#L6 assume !(~n < 1); 195#L8 assume !(1 == ~n); 188#L11 call #t~ret0 := fibo(~n - 1);< 198#fiboENTRY ~n := #in~n; 199#L6 assume !(~n < 1); 193#L8 assume 1 == ~n;#res := 1; 194#fiboFINAL assume true; 187#fiboEXIT >#33#return; 189#L11-1 [2018-11-18 08:57:25,944 INFO L796 eck$LassoCheckResult]: Loop: 189#L11-1 call #t~ret1 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume !(1 == ~n); 201#L11 call #t~ret0 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume 1 == ~n;#res := 1; 207#fiboFINAL assume true; 205#fiboEXIT >#33#return; 189#L11-1 [2018-11-18 08:57:25,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2018-11-18 08:57:25,944 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:25,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:25,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:25,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:25,987 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 08:57:25,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:57:25,988 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:57:26,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:26,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:26,013 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 08:57:26,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 08:57:26,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 08:57:26,034 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 08:57:26,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2018-11-18 08:57:26,034 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:26,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:26,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:26,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:26,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:26,142 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:26,142 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:26,142 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:26,142 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:26,142 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 08:57:26,143 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:26,143 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:26,143 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:26,143 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-18 08:57:26,143 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:26,143 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:26,144 INFO 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 08:57:26,153 INFO 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 08:57:26,156 INFO 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 08:57:26,160 INFO 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 08:57:26,198 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:26,199 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:26,201 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:26,202 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:26,226 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 08:57:26,226 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:26,862 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 08:57:26,865 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:26,865 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:26,865 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:26,865 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:26,865 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 08:57:26,865 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:26,866 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:26,866 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:26,866 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-18 08:57:26,866 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:26,866 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:26,867 INFO 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 08:57:26,870 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 08:57:26,879 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 08:57:26,881 INFO 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 08:57:26,922 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:26,922 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 08:57:26,923 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 08:57:26,924 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:26,924 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:26,924 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:26,924 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:26,924 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:26,925 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:26,925 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:26,927 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:57:26,928 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 08:57:26,928 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:26,928 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:26,929 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:26,929 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:26,929 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:26,929 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:26,929 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:26,935 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 08:57:26,939 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 08:57:26,939 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 08:57:26,940 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 08:57:26,940 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 08:57:26,940 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 08:57:26,940 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-18 08:57:26,940 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 08:57:26,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:26,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:27,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:27,047 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 08:57:27,047 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 08:57:27,047 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-18 08:57:27,178 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 135 states and 183 transitions. Complement of second has 28 states. [2018-11-18 08:57:27,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 08:57:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-11-18 08:57:27,182 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 10 letters. [2018-11-18 08:57:27,183 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:27,183 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 22 letters. Loop has 10 letters. [2018-11-18 08:57:27,183 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:27,183 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 20 letters. [2018-11-18 08:57:27,184 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:27,184 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2018-11-18 08:57:27,192 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-18 08:57:27,196 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2018-11-18 08:57:27,197 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2018-11-18 08:57:27,197 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-11-18 08:57:27,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2018-11-18 08:57:27,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:27,197 INFO L705 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2018-11-18 08:57:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2018-11-18 08:57:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2018-11-18 08:57:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-18 08:57:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2018-11-18 08:57:27,207 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2018-11-18 08:57:27,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 08:57:27,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 08:57:27,207 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 7 states. [2018-11-18 08:57:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:57:27,271 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2018-11-18 08:57:27,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 08:57:27,271 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2018-11-18 08:57:27,275 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-18 08:57:27,278 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2018-11-18 08:57:27,278 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2018-11-18 08:57:27,279 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-11-18 08:57:27,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2018-11-18 08:57:27,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:27,279 INFO L705 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2018-11-18 08:57:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2018-11-18 08:57:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2018-11-18 08:57:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-18 08:57:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2018-11-18 08:57:27,289 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-11-18 08:57:27,289 INFO L608 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-11-18 08:57:27,289 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-18 08:57:27,289 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2018-11-18 08:57:27,291 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-18 08:57:27,291 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:57:27,291 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:57:27,292 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:57:27,292 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-18 08:57:27,292 INFO L794 eck$LassoCheckResult]: Stem: 720#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 710#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 711#L25 call main_#t~ret2 := fibo(main_~x~0);< 752#fiboENTRY ~n := #in~n; 755#L6 assume !(~n < 1); 726#L8 assume !(1 == ~n); 727#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(1 == ~n); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(1 == ~n); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 740#L6 assume !(~n < 1); 775#L8 assume 1 == ~n;#res := 1; 773#fiboFINAL assume true; 772#fiboEXIT >#33#return; 729#L11-1 call #t~ret1 := fibo(~n - 2);< 771#fiboENTRY ~n := #in~n; 801#L6 assume ~n < 1;#res := 0; 800#fiboFINAL assume true; 799#fiboEXIT >#35#return; 798#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 797#fiboFINAL assume true; 790#fiboEXIT >#33#return; 723#L11-1 [2018-11-18 08:57:27,292 INFO L796 eck$LassoCheckResult]: Loop: 723#L11-1 call #t~ret1 := fibo(~n - 2);< 750#fiboENTRY ~n := #in~n; 776#L6 assume !(~n < 1); 721#L8 assume !(1 == ~n); 724#L11 call #t~ret0 := fibo(~n - 1);< 750#fiboENTRY ~n := #in~n; 776#L6 assume !(~n < 1); 721#L8 assume 1 == ~n;#res := 1; 725#fiboFINAL assume true; 791#fiboEXIT >#33#return; 723#L11-1 [2018-11-18 08:57:27,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2018-11-18 08:57:27,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:27,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:27,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:27,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:27,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 08:57:27,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:57:27,357 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:57:27,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:27,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 08:57:27,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 08:57:27,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 08:57:27,416 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 08:57:27,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:27,416 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 2 times [2018-11-18 08:57:27,416 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:27,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:27,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:27,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:27,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:27,490 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:27,490 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:27,490 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:27,490 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:27,490 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 08:57:27,490 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:27,490 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:27,490 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:27,491 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-18 08:57:27,491 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:27,491 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:27,491 INFO 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 08:57:27,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 08:57:27,499 INFO 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 08:57:27,500 INFO 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 08:57:27,527 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:27,527 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:27,529 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:27,529 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:27,552 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 08:57:27,552 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:28,187 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 08:57:28,189 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:28,189 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:28,189 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:28,190 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:28,190 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 08:57:28,190 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:28,190 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:28,190 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:28,190 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-18 08:57:28,190 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:28,190 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:28,191 INFO 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 08:57:28,193 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 08:57:28,194 INFO 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 08:57:28,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 08:57:28,227 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:28,227 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 08:57:28,228 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 08:57:28,228 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:28,228 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:28,228 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:28,229 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:28,241 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:28,243 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:28,243 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:28,244 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:57:28,245 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 08:57:28,246 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:28,247 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:28,247 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:28,247 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:28,247 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:28,247 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:28,248 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:28,249 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:57:28,249 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 08:57:28,249 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:28,250 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:28,250 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:28,250 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:28,250 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:28,250 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:28,251 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:28,253 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:57:28,253 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 08:57:28,254 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:28,254 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:28,254 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:28,254 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:28,254 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:28,256 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:28,256 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:28,260 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 08:57:28,263 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 08:57:28,263 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 08:57:28,263 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 08:57:28,263 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 08:57:28,264 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 08:57:28,264 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-18 08:57:28,265 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 08:57:28,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:28,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:28,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:28,358 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 08:57:28,359 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 08:57:28,359 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-18 08:57:28,474 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 163 states and 217 transitions. Complement of second has 25 states. [2018-11-18 08:57:28,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 08:57:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-11-18 08:57:28,477 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 28 letters. Loop has 10 letters. [2018-11-18 08:57:28,477 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:28,477 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 08:57:28,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:28,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:28,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:28,598 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 08:57:28,599 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 08:57:28,599 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-18 08:57:28,719 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 288 states and 387 transitions. Complement of second has 25 states. [2018-11-18 08:57:28,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 08:57:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2018-11-18 08:57:28,723 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2018-11-18 08:57:28,723 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:28,723 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 08:57:28,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:28,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:28,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:28,821 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 08:57:28,822 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 08:57:28,822 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-18 08:57:28,972 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 826 states and 1091 transitions. Complement of second has 112 states. [2018-11-18 08:57:28,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 08:57:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 40 transitions. [2018-11-18 08:57:28,975 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 10 letters. [2018-11-18 08:57:28,975 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:28,976 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 38 letters. Loop has 10 letters. [2018-11-18 08:57:28,976 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:28,976 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 20 letters. [2018-11-18 08:57:28,978 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:28,978 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 826 states and 1091 transitions. [2018-11-18 08:57:28,992 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-18 08:57:29,001 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 826 states to 413 states and 595 transitions. [2018-11-18 08:57:29,002 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-11-18 08:57:29,003 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 180 [2018-11-18 08:57:29,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 413 states and 595 transitions. [2018-11-18 08:57:29,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:29,004 INFO L705 BuchiCegarLoop]: Abstraction has 413 states and 595 transitions. [2018-11-18 08:57:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states and 595 transitions. [2018-11-18 08:57:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 336. [2018-11-18 08:57:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2018-11-18 08:57:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 463 transitions. [2018-11-18 08:57:29,036 INFO L728 BuchiCegarLoop]: Abstraction has 336 states and 463 transitions. [2018-11-18 08:57:29,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 08:57:29,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-18 08:57:29,037 INFO L87 Difference]: Start difference. First operand 336 states and 463 transitions. Second operand 10 states. [2018-11-18 08:57:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:57:29,204 INFO L93 Difference]: Finished difference Result 498 states and 786 transitions. [2018-11-18 08:57:29,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 08:57:29,206 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 498 states and 786 transitions. [2018-11-18 08:57:29,212 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-18 08:57:29,220 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 498 states to 496 states and 783 transitions. [2018-11-18 08:57:29,220 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 243 [2018-11-18 08:57:29,221 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 243 [2018-11-18 08:57:29,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 496 states and 783 transitions. [2018-11-18 08:57:29,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:29,221 INFO L705 BuchiCegarLoop]: Abstraction has 496 states and 783 transitions. [2018-11-18 08:57:29,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states and 783 transitions. [2018-11-18 08:57:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 370. [2018-11-18 08:57:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2018-11-18 08:57:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 523 transitions. [2018-11-18 08:57:29,245 INFO L728 BuchiCegarLoop]: Abstraction has 370 states and 523 transitions. [2018-11-18 08:57:29,245 INFO L608 BuchiCegarLoop]: Abstraction has 370 states and 523 transitions. [2018-11-18 08:57:29,245 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-18 08:57:29,245 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 370 states and 523 transitions. [2018-11-18 08:57:29,248 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-18 08:57:29,248 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:57:29,248 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:57:29,249 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:57:29,249 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-18 08:57:29,250 INFO L794 eck$LassoCheckResult]: Stem: 3582#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3580#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 3581#L25 call main_#t~ret2 := fibo(main_~x~0);< 3622#fiboENTRY ~n := #in~n; 3634#L6 assume !(~n < 1); 3633#L8 assume !(1 == ~n); 3629#L11 call #t~ret0 := fibo(~n - 1);< 3631#fiboENTRY ~n := #in~n; 3632#L6 assume !(~n < 1); 3628#L8 assume !(1 == ~n); 3584#L11 call #t~ret0 := fibo(~n - 1);< 3625#fiboENTRY ~n := #in~n; 3627#L6 assume !(~n < 1); 3630#L8 assume !(1 == ~n); 3585#L11 call #t~ret0 := fibo(~n - 1);< 3625#fiboENTRY ~n := #in~n; 3626#L6 assume !(~n < 1); 3583#L8 assume 1 == ~n;#res := 1; 3586#fiboFINAL assume true; 3676#fiboEXIT >#33#return; 3652#L11-1 call #t~ret1 := fibo(~n - 2);< 3661#fiboENTRY ~n := #in~n; 3720#L6 assume !(~n < 1); 3712#L8 assume !(1 == ~n); 3714#L11 call #t~ret0 := fibo(~n - 1);< 3913#fiboENTRY ~n := #in~n; 3918#L6 assume !(~n < 1); 3915#L8 assume !(1 == ~n); 3916#L11 call #t~ret0 := fibo(~n - 1);< 3925#fiboENTRY [2018-11-18 08:57:29,250 INFO L796 eck$LassoCheckResult]: Loop: 3925#fiboENTRY ~n := #in~n; 3932#L6 assume !(~n < 1); 3931#L8 assume !(1 == ~n); 3922#L11 call #t~ret0 := fibo(~n - 1);< 3925#fiboENTRY [2018-11-18 08:57:29,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:29,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1816361660, now seen corresponding path program 1 times [2018-11-18 08:57:29,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:29,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:29,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:29,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:57:29,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-18 08:57:29,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:57:29,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 08:57:29,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:29,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 08:57:29,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 08:57:29,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-18 08:57:29,432 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 08:57:29,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2018-11-18 08:57:29,433 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:29,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:29,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:29,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:57:29,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:29,459 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:29,459 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:29,459 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:29,459 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:29,459 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 08:57:29,459 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:29,459 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:29,459 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:29,460 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-18 08:57:29,460 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:29,460 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:29,461 INFO 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 08:57:29,462 INFO 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 08:57:29,466 INFO 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 08:57:29,467 INFO 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 08:57:29,468 INFO 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 08:57:29,487 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:29,487 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:29,490 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:29,490 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:29,493 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:57:29,493 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:29,513 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:29,513 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:29,536 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 08:57:29,536 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:29,556 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 08:57:29,558 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:29,558 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:29,558 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:29,558 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:29,558 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 08:57:29,558 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:29,559 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:29,559 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:29,559 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-18 08:57:29,559 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:29,559 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:29,560 INFO 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 08:57:29,570 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 08:57:29,572 INFO 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 08:57:29,574 INFO 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 08:57:29,578 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 08:57:29,602 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:29,602 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 08:57:29,603 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 08:57:29,603 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:29,603 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:29,604 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:29,604 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:29,604 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:29,604 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:29,604 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:29,607 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 08:57:29,609 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 08:57:29,609 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 08:57:29,609 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 08:57:29,610 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 08:57:29,610 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 08:57:29,610 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-18 08:57:29,610 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 08:57:29,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:29,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:29,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:29,698 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 08:57:29,699 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 08:57:29,699 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-18 08:57:29,761 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 380 states and 533 transitions. Complement of second has 13 states. [2018-11-18 08:57:29,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 08:57:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-11-18 08:57:29,767 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-11-18 08:57:29,767 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:29,767 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 08:57:29,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:29,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:29,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:29,887 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 08:57:29,887 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 08:57:29,887 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-18 08:57:29,941 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 380 states and 533 transitions. Complement of second has 13 states. [2018-11-18 08:57:29,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 08:57:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-11-18 08:57:29,942 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-11-18 08:57:29,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:29,943 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 08:57:29,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:29,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:30,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:30,018 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 08:57:30,018 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 08:57:30,018 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-18 08:57:30,076 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 495 states and 657 transitions. Complement of second has 14 states. [2018-11-18 08:57:30,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 08:57:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2018-11-18 08:57:30,079 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2018-11-18 08:57:30,079 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:30,079 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2018-11-18 08:57:30,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:30,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2018-11-18 08:57:30,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:30,081 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 657 transitions. [2018-11-18 08:57:30,085 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-18 08:57:30,091 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 408 states and 568 transitions. [2018-11-18 08:57:30,091 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 157 [2018-11-18 08:57:30,092 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 163 [2018-11-18 08:57:30,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 408 states and 568 transitions. [2018-11-18 08:57:30,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:30,092 INFO L705 BuchiCegarLoop]: Abstraction has 408 states and 568 transitions. [2018-11-18 08:57:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states and 568 transitions. [2018-11-18 08:57:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 394. [2018-11-18 08:57:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-11-18 08:57:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 547 transitions. [2018-11-18 08:57:30,109 INFO L728 BuchiCegarLoop]: Abstraction has 394 states and 547 transitions. [2018-11-18 08:57:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 08:57:30,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-11-18 08:57:30,110 INFO L87 Difference]: Start difference. First operand 394 states and 547 transitions. Second operand 14 states. [2018-11-18 08:57:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:57:30,339 INFO L93 Difference]: Finished difference Result 275 states and 349 transitions. [2018-11-18 08:57:30,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 08:57:30,340 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 275 states and 349 transitions. [2018-11-18 08:57:30,364 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-18 08:57:30,367 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 275 states to 245 states and 314 transitions. [2018-11-18 08:57:30,367 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 120 [2018-11-18 08:57:30,367 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 123 [2018-11-18 08:57:30,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 245 states and 314 transitions. [2018-11-18 08:57:30,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:30,367 INFO L705 BuchiCegarLoop]: Abstraction has 245 states and 314 transitions. [2018-11-18 08:57:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states and 314 transitions. [2018-11-18 08:57:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 204. [2018-11-18 08:57:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-11-18 08:57:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2018-11-18 08:57:30,379 INFO L728 BuchiCegarLoop]: Abstraction has 204 states and 261 transitions. [2018-11-18 08:57:30,380 INFO L608 BuchiCegarLoop]: Abstraction has 204 states and 261 transitions. [2018-11-18 08:57:30,380 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-18 08:57:30,380 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 204 states and 261 transitions. [2018-11-18 08:57:30,381 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-18 08:57:30,381 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:57:30,381 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:57:30,385 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:57:30,385 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-18 08:57:30,385 INFO L794 eck$LassoCheckResult]: Stem: 6358#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6356#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 6357#L25 call main_#t~ret2 := fibo(main_~x~0);< 6395#fiboENTRY ~n := #in~n; 6465#L6 assume !(~n < 1); 6464#L8 assume !(1 == ~n); 6460#L11 call #t~ret0 := fibo(~n - 1);< 6463#fiboENTRY ~n := #in~n; 6462#L6 assume !(~n < 1); 6461#L8 assume !(1 == ~n); 6455#L11 call #t~ret0 := fibo(~n - 1);< 6459#fiboENTRY ~n := #in~n; 6457#L6 assume !(~n < 1); 6458#L8 assume !(1 == ~n); 6383#L11 call #t~ret0 := fibo(~n - 1);< 6453#fiboENTRY ~n := #in~n; 6454#L6 assume !(~n < 1); 6456#L8 assume !(1 == ~n); 6384#L11 call #t~ret0 := fibo(~n - 1);< 6453#fiboENTRY ~n := #in~n; 6454#L6 assume !(~n < 1); 6456#L8 assume !(1 == ~n); 6384#L11 call #t~ret0 := fibo(~n - 1);< 6453#fiboENTRY ~n := #in~n; 6449#L6 assume !(~n < 1); 6450#L8 assume 1 == ~n;#res := 1; 6550#fiboFINAL assume true; 6549#fiboEXIT >#33#return; 6351#L11-1 call #t~ret1 := fibo(~n - 2);< 6385#fiboENTRY ~n := #in~n; 6553#L6 assume ~n < 1;#res := 0; 6552#fiboFINAL assume true; 6350#fiboEXIT >#35#return; 6352#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 6538#fiboFINAL assume true; 6523#fiboEXIT >#33#return; 6374#L11-1 call #t~ret1 := fibo(~n - 2);< 6522#fiboENTRY ~n := #in~n; 6541#L6 assume !(~n < 1); 6396#L8 assume !(1 == ~n); 6360#L11 call #t~ret0 := fibo(~n - 1);< 6389#fiboENTRY ~n := #in~n; 6445#L6 assume !(~n < 1); 6435#L8 assume !(1 == ~n); 6417#L11 call #t~ret0 := fibo(~n - 1);< 6418#fiboENTRY ~n := #in~n; 6432#L6 assume !(~n < 1); 6430#L8 assume !(1 == ~n); 6416#L11 [2018-11-18 08:57:30,385 INFO L796 eck$LassoCheckResult]: Loop: 6416#L11 call #t~ret0 := fibo(~n - 1);< 6418#fiboENTRY ~n := #in~n; 6432#L6 assume !(~n < 1); 6430#L8 assume !(1 == ~n); 6416#L11 [2018-11-18 08:57:30,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:30,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1127026968, now seen corresponding path program 2 times [2018-11-18 08:57:30,388 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:30,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:30,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:30,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:57:30,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-18 08:57:30,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:57:30,466 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:30,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 08:57:30,495 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 08:57:30,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:57:30,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 08:57:30,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 08:57:30,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-11-18 08:57:30,643 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 08:57:30,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:30,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 3 times [2018-11-18 08:57:30,643 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:30,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:30,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:30,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:57:30,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:30,678 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:30,679 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:30,679 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:30,679 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:30,679 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 08:57:30,679 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:30,679 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:30,679 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:30,679 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration6_Loop [2018-11-18 08:57:30,679 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:30,679 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:30,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 08:57:30,684 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 08:57:30,692 INFO 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 08:57:30,694 INFO 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 08:57:30,721 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:30,721 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:30,731 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:30,731 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:30,742 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:57:30,742 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:30,764 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:30,764 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:30,798 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 08:57:30,799 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:37,068 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 08:57:37,070 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:37,070 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:37,071 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:37,071 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:37,071 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 08:57:37,071 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:37,071 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:37,071 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:37,071 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration6_Loop [2018-11-18 08:57:37,071 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:37,071 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:37,072 INFO 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 08:57:37,080 INFO 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 08:57:37,086 INFO 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 08:57:37,088 INFO 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 08:57:37,112 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:37,112 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 08:57:37,113 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 08:57:37,113 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:37,113 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:37,113 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:37,113 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:37,113 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:37,114 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:37,114 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:37,116 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 08:57:37,118 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 08:57:37,118 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 08:57:37,118 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 08:57:37,118 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 08:57:37,118 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 08:57:37,118 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-18 08:57:37,119 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 08:57:37,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:37,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:37,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:37,205 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 08:57:37,206 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-18 08:57:37,206 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-18 08:57:37,240 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 216 states and 274 transitions. Complement of second has 18 states. [2018-11-18 08:57:37,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-18 08:57:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2018-11-18 08:57:37,241 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2018-11-18 08:57:37,241 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:37,241 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 08:57:37,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:37,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:37,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:37,346 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 08:57:37,347 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-18 08:57:37,347 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-18 08:57:37,529 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 222 states and 280 transitions. Complement of second has 17 states. [2018-11-18 08:57:37,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-18 08:57:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2018-11-18 08:57:37,530 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2018-11-18 08:57:37,530 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:37,530 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 08:57:37,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:37,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:37,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:37,624 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 08:57:37,624 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-18 08:57:37,624 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-18 08:57:37,672 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 272 states and 344 transitions. Complement of second has 27 states. [2018-11-18 08:57:37,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-18 08:57:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2018-11-18 08:57:37,673 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2018-11-18 08:57:37,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:37,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2018-11-18 08:57:37,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:37,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2018-11-18 08:57:37,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:37,675 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 272 states and 344 transitions. [2018-11-18 08:57:37,677 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-18 08:57:37,680 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 272 states to 208 states and 266 transitions. [2018-11-18 08:57:37,680 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 80 [2018-11-18 08:57:37,680 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 91 [2018-11-18 08:57:37,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 208 states and 266 transitions. [2018-11-18 08:57:37,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:37,681 INFO L705 BuchiCegarLoop]: Abstraction has 208 states and 266 transitions. [2018-11-18 08:57:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states and 266 transitions. [2018-11-18 08:57:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-11-18 08:57:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-11-18 08:57:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2018-11-18 08:57:37,686 INFO L728 BuchiCegarLoop]: Abstraction has 204 states and 261 transitions. [2018-11-18 08:57:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 08:57:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-11-18 08:57:37,687 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 20 states. [2018-11-18 08:57:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:57:37,949 INFO L93 Difference]: Finished difference Result 345 states and 474 transitions. [2018-11-18 08:57:37,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 08:57:37,949 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 474 transitions. [2018-11-18 08:57:37,951 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-18 08:57:37,955 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 316 states and 438 transitions. [2018-11-18 08:57:37,955 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 145 [2018-11-18 08:57:37,955 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 155 [2018-11-18 08:57:37,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 316 states and 438 transitions. [2018-11-18 08:57:37,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:37,956 INFO L705 BuchiCegarLoop]: Abstraction has 316 states and 438 transitions. [2018-11-18 08:57:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states and 438 transitions. [2018-11-18 08:57:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 271. [2018-11-18 08:57:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-11-18 08:57:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 365 transitions. [2018-11-18 08:57:37,964 INFO L728 BuchiCegarLoop]: Abstraction has 271 states and 365 transitions. [2018-11-18 08:57:37,964 INFO L608 BuchiCegarLoop]: Abstraction has 271 states and 365 transitions. [2018-11-18 08:57:37,964 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-18 08:57:37,964 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 271 states and 365 transitions. [2018-11-18 08:57:37,966 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-18 08:57:37,966 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:57:37,966 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:57:37,967 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2018-11-18 08:57:37,967 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-18 08:57:37,967 INFO L794 eck$LassoCheckResult]: Stem: 8580#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 8569#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 8570#L25 call main_#t~ret2 := fibo(main_~x~0);< 8616#fiboENTRY ~n := #in~n; 8678#L6 assume !(~n < 1); 8676#L8 assume !(1 == ~n); 8673#L11 call #t~ret0 := fibo(~n - 1);< 8674#fiboENTRY ~n := #in~n; 8689#L6 assume !(~n < 1); 8688#L8 assume !(1 == ~n); 8683#L11 call #t~ret0 := fibo(~n - 1);< 8687#fiboENTRY ~n := #in~n; 8691#L6 assume !(~n < 1); 8685#L8 assume !(1 == ~n); 8680#L11 call #t~ret0 := fibo(~n - 1);< 8684#fiboENTRY ~n := #in~n; 8710#L6 assume !(~n < 1); 8709#L8 assume !(1 == ~n); 8609#L11 call #t~ret0 := fibo(~n - 1);< 8704#fiboENTRY ~n := #in~n; 8719#L6 assume !(~n < 1); 8718#L8 assume !(1 == ~n); 8608#L11 call #t~ret0 := fibo(~n - 1);< 8704#fiboENTRY ~n := #in~n; 8719#L6 assume !(~n < 1); 8718#L8 assume !(1 == ~n); 8608#L11 call #t~ret0 := fibo(~n - 1);< 8704#fiboENTRY ~n := #in~n; 8719#L6 assume !(~n < 1); 8718#L8 assume !(1 == ~n); 8608#L11 call #t~ret0 := fibo(~n - 1);< 8704#fiboENTRY ~n := #in~n; 8720#L6 assume !(~n < 1); 8814#L8 assume 1 == ~n;#res := 1; 8812#fiboFINAL assume true; 8810#fiboEXIT >#33#return; 8607#L11-1 call #t~ret1 := fibo(~n - 2);< 8610#fiboENTRY ~n := #in~n; 8767#L6 assume ~n < 1;#res := 0; 8762#fiboFINAL assume true; 8758#fiboEXIT >#35#return; 8742#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8739#fiboFINAL assume true; 8732#fiboEXIT >#33#return; 8727#L11-1 call #t~ret1 := fibo(~n - 2);< 8729#fiboENTRY ~n := #in~n; 8737#L6 assume !(~n < 1); 8735#L8 assume 1 == ~n;#res := 1; 8624#fiboFINAL assume true; 8726#fiboEXIT >#35#return; 8694#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8721#fiboFINAL assume true; 8695#fiboEXIT >#33#return; 8621#L11-1 call #t~ret1 := fibo(~n - 2);< 8701#fiboENTRY ~n := #in~n; 8631#L6 assume !(~n < 1); 8620#L8 assume !(1 == ~n); 8572#L11 call #t~ret0 := fibo(~n - 1);< 8613#fiboENTRY ~n := #in~n; 8832#L6 assume !(~n < 1); 8833#L8 assume !(1 == ~n); 8635#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8659#L6 assume !(~n < 1); 8657#L8 assume !(1 == ~n); 8633#L11 [2018-11-18 08:57:37,968 INFO L796 eck$LassoCheckResult]: Loop: 8633#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8659#L6 assume !(~n < 1); 8657#L8 assume !(1 == ~n); 8633#L11 [2018-11-18 08:57:37,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:37,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1780673760, now seen corresponding path program 3 times [2018-11-18 08:57:37,968 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:37,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:37,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:37,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:57:37,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 157 proven. 95 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-18 08:57:38,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 08:57:38,099 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:38,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 08:57:38,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-18 08:57:38,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 08:57:38,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-11-18 08:57:38,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 08:57:38,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 26 [2018-11-18 08:57:38,208 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 08:57:38,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:38,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 4 times [2018-11-18 08:57:38,208 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:57:38,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:57:38,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:38,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 08:57:38,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:57:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:57:38,236 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:38,237 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:38,237 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:38,237 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:38,237 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 08:57:38,237 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:38,237 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:38,237 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:38,237 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-18 08:57:38,237 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:38,237 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:38,237 INFO 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 08:57:38,239 INFO 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 08:57:38,244 INFO 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 08:57:38,244 INFO 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 08:57:38,267 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:38,267 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:38,270 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:38,270 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:38,272 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:57:38,272 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:38,294 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:57:38,294 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_18e4ad64-34ed-496d-92fd-17132c0ce670/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 08:57:38,314 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 08:57:38,314 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:57:39,139 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 08:57:39,141 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:57:39,141 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:57:39,141 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:57:39,141 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:57:39,141 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 08:57:39,141 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:57:39,141 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:57:39,141 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:57:39,141 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-18 08:57:39,142 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:57:39,142 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:57:39,142 INFO 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 08:57:39,143 INFO 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 08:57:39,148 INFO 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 08:57:39,149 INFO 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 08:57:39,176 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:57:39,176 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 08:57:39,177 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 08:57:39,177 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:39,177 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:39,178 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:39,178 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:39,178 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:39,178 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:39,178 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:39,179 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:57:39,179 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 08:57:39,180 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:57:39,180 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:57:39,180 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:57:39,180 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:57:39,180 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:57:39,181 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:57:39,181 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:57:39,183 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 08:57:39,184 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 08:57:39,185 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 08:57:39,185 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 08:57:39,185 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 08:57:39,185 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 08:57:39,185 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-18 08:57:39,186 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 08:57:39,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:39,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:39,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:39,281 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 08:57:39,281 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-18 08:57:39,281 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-18 08:57:39,314 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 286 states and 381 transitions. Complement of second has 18 states. [2018-11-18 08:57:39,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-18 08:57:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2018-11-18 08:57:39,315 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 65 letters. Loop has 4 letters. [2018-11-18 08:57:39,315 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:39,315 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 08:57:39,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:39,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:39,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:39,420 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 08:57:39,421 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-18 08:57:39,421 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-18 08:57:39,472 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 292 states and 387 transitions. Complement of second has 17 states. [2018-11-18 08:57:39,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-18 08:57:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2018-11-18 08:57:39,473 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 65 letters. Loop has 4 letters. [2018-11-18 08:57:39,473 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:39,473 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 08:57:39,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:57:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:39,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:57:39,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:57:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 08:57:39,585 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-18 08:57:39,585 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-18 08:57:39,626 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 350 states and 463 transitions. Complement of second has 27 states. [2018-11-18 08:57:39,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-18 08:57:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-18 08:57:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2018-11-18 08:57:39,627 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 65 letters. Loop has 4 letters. [2018-11-18 08:57:39,627 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:39,627 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2018-11-18 08:57:39,628 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:39,628 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 65 letters. Loop has 8 letters. [2018-11-18 08:57:39,628 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:57:39,628 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 350 states and 463 transitions. [2018-11-18 08:57:39,631 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-18 08:57:39,632 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 350 states to 275 states and 370 transitions. [2018-11-18 08:57:39,632 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 112 [2018-11-18 08:57:39,633 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 123 [2018-11-18 08:57:39,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 275 states and 370 transitions. [2018-11-18 08:57:39,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:57:39,633 INFO L705 BuchiCegarLoop]: Abstraction has 275 states and 370 transitions. [2018-11-18 08:57:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states and 370 transitions. [2018-11-18 08:57:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 271. [2018-11-18 08:57:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-11-18 08:57:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 365 transitions. [2018-11-18 08:57:39,638 INFO L728 BuchiCegarLoop]: Abstraction has 271 states and 365 transitions. [2018-11-18 08:57:39,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 08:57:39,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2018-11-18 08:57:39,639 INFO L87 Difference]: Start difference. First operand 271 states and 365 transitions. Second operand 26 states. [2018-11-18 08:57:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:57:40,116 INFO L93 Difference]: Finished difference Result 295 states and 336 transitions. [2018-11-18 08:57:40,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-18 08:57:40,117 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 295 states and 336 transitions. [2018-11-18 08:57:40,120 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 08:57:40,120 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 295 states to 0 states and 0 transitions. [2018-11-18 08:57:40,120 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-18 08:57:40,120 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-18 08:57:40,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-18 08:57:40,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-18 08:57:40,120 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 08:57:40,120 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 08:57:40,120 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 08:57:40,120 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-18 08:57:40,120 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-18 08:57:40,121 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 08:57:40,121 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-18 08:57:40,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 08:57:40 BoogieIcfgContainer [2018-11-18 08:57:40,127 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-18 08:57:40,128 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 08:57:40,128 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 08:57:40,128 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 08:57:40,129 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:57:24" (3/4) ... [2018-11-18 08:57:40,133 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 08:57:40,133 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 08:57:40,134 INFO L168 Benchmark]: Toolchain (without parser) took 15868.66 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 340.3 MB). Free memory was 960.2 MB in the beginning and 1.1 GB in the end (delta: -159.7 MB). Peak memory consumption was 180.6 MB. Max. memory is 11.5 GB. [2018-11-18 08:57:40,135 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:57:40,136 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.59 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 08:57:40,137 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.81 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 08:57:40,137 INFO L168 Benchmark]: Boogie Preprocessor took 17.51 ms. Allocated memory is still 1.0 GB. Free memory is still 946.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:57:40,138 INFO L168 Benchmark]: RCFGBuilder took 213.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -191.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-18 08:57:40,138 INFO L168 Benchmark]: BuchiAutomizer took 15425.63 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 185.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 203.6 MB. Max. memory is 11.5 GB. [2018-11-18 08:57:40,139 INFO L168 Benchmark]: Witness Printer took 5.53 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:57:40,143 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 171.59 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.81 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.51 ms. Allocated memory is still 1.0 GB. Free memory is still 946.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 213.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -191.6 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 15425.63 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 185.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.6 MB). Peak memory consumption was 203.6 MB. Max. memory is 11.5 GB. * Witness Printer took 5.53 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (6 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 6 modules have a trivial ranking function, the largest among these consists of 26 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 15.3s and 8 iterations. TraceHistogramMax:13. Analysis of lassos took 11.0s. Construction of modules took 0.8s. Büchi inclusion checks took 3.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 342 StatesRemovedByMinimization, 10 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 370 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 262 SDtfs, 631 SDslu, 392 SDs, 0 SdLazy, 1339 SolverSat, 416 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf98 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq187 hnf92 smp81 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 10ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 7 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...