./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ca069cb8d4103e8fb4700634948424bd87542bc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 22:17:41,642 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 22:17:41,643 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 22:17:41,649 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 22:17:41,649 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 22:17:41,650 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 22:17:41,650 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 22:17:41,651 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 22:17:41,652 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 22:17:41,652 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 22:17:41,653 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 22:17:41,653 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 22:17:41,653 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 22:17:41,654 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 22:17:41,654 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 22:17:41,655 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 22:17:41,655 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 22:17:41,656 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 22:17:41,657 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 22:17:41,658 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 22:17:41,658 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 22:17:41,659 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 22:17:41,660 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 22:17:41,660 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 22:17:41,660 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 22:17:41,661 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 22:17:41,661 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 22:17:41,661 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 22:17:41,662 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 22:17:41,662 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 22:17:41,662 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 22:17:41,663 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 22:17:41,663 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 22:17:41,663 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 22:17:41,664 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 22:17:41,664 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 22:17:41,664 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-12-02 22:17:41,672 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 22:17:41,672 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 22:17:41,672 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 22:17:41,673 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 22:17:41,673 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 22:17:41,673 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-02 22:17:41,673 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-02 22:17:41,673 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-02 22:17:41,673 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-02 22:17:41,673 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-02 22:17:41,674 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-02 22:17:41,674 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 22:17:41,674 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 22:17:41,674 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 22:17:41,674 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 22:17:41,674 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 22:17:41,674 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 22:17:41,674 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-02 22:17:41,675 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-02 22:17:41,675 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-02 22:17:41,675 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 22:17:41,675 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 22:17:41,675 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-02 22:17:41,675 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 22:17:41,675 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-02 22:17:41,675 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 22:17:41,676 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 22:17:41,676 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-02 22:17:41,676 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 22:17:41,676 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 22:17:41,676 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-02 22:17:41,677 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-02 22:17:41,677 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ca069cb8d4103e8fb4700634948424bd87542bc [2018-12-02 22:17:41,694 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 22:17:41,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 22:17:41,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 22:17:41,704 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 22:17:41,704 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 22:17:41,705 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10_false-unreach-call_true-termination.c [2018-12-02 22:17:41,743 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/data/cc4171ca3/9c74ee2cd07d41b5a9e4320d3ec47e8d/FLAG4e7359cab [2018-12-02 22:17:42,071 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 22:17:42,072 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/sv-benchmarks/c/recursive-simple/fibo_10_false-unreach-call_true-termination.c [2018-12-02 22:17:42,075 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/data/cc4171ca3/9c74ee2cd07d41b5a9e4320d3ec47e8d/FLAG4e7359cab [2018-12-02 22:17:42,479 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/data/cc4171ca3/9c74ee2cd07d41b5a9e4320d3ec47e8d [2018-12-02 22:17:42,481 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 22:17:42,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 22:17:42,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 22:17:42,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 22:17:42,484 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 22:17:42,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cecaa61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42, skipping insertion in model container [2018-12-02 22:17:42,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 22:17:42,503 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 22:17:42,590 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 22:17:42,592 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 22:17:42,602 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 22:17:42,611 INFO L195 MainTranslator]: Completed translation [2018-12-02 22:17:42,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42 WrapperNode [2018-12-02 22:17:42,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 22:17:42,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 22:17:42,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 22:17:42,612 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 22:17:42,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 22:17:42,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 22:17:42,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 22:17:42,631 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 22:17:42,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... [2018-12-02 22:17:42,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 22:17:42,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 22:17:42,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 22:17:42,640 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 22:17:42,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:42,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 22:17:42,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 22:17:42,704 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-12-02 22:17:42,704 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-12-02 22:17:42,788 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 22:17:42,788 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-02 22:17:42,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:17:42 BoogieIcfgContainer [2018-12-02 22:17:42,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 22:17:42,789 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-02 22:17:42,789 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-02 22:17:42,791 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-02 22:17:42,791 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 22:17:42,792 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 02.12 10:17:42" (1/3) ... [2018-12-02 22:17:42,792 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@78915423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.12 10:17:42, skipping insertion in model container [2018-12-02 22:17:42,792 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 22:17:42,792 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:42" (2/3) ... [2018-12-02 22:17:42,793 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@78915423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.12 10:17:42, skipping insertion in model container [2018-12-02 22:17:42,793 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-02 22:17:42,793 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:17:42" (3/3) ... [2018-12-02 22:17:42,794 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_10_false-unreach-call_true-termination.c [2018-12-02 22:17:42,828 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 22:17:42,828 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-02 22:17:42,828 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-02 22:17:42,828 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-02 22:17:42,829 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 22:17:42,829 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 22:17:42,829 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-02 22:17:42,829 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 22:17:42,829 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-02 22:17:42,837 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-12-02 22:17:42,853 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 22:17:42,854 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:42,854 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:42,860 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-02 22:17:42,860 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 22:17:42,860 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-02 22:17:42,860 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-12-02 22:17:42,861 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 22:17:42,862 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:42,862 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:42,862 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-02 22:17:42,862 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 22:17:42,867 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-12-02 22:17:42,867 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2018-12-02 22:17:42,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:42,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-12-02 22:17:42,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:42,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:42,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:42,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:42,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:42,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:42,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-12-02 22:17:42,929 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:42,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:42,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:42,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:42,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:42,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-12-02 22:17:42,937 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:42,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:42,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:42,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:42,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:43,004 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:43,005 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:43,005 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:43,005 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:43,005 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 22:17:43,005 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,005 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:43,005 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:43,005 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration1_Loop [2018-12-02 22:17:43,006 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:43,006 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:43,018 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,024 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,026 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,066 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:43,067 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,070 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:43,070 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:43,075 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 22:17:43,075 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,091 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:43,091 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:43,093 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 22:17:43,093 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,108 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:43,108 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:43,110 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 22:17:43,111 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,125 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:43,125 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:43,127 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 22:17:43,127 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,142 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:43,142 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,159 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 22:17:43,159 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:43,175 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 22:17:43,176 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:43,176 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:43,176 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:43,176 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:43,176 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 22:17:43,176 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,176 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:43,176 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:43,176 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration1_Loop [2018-12-02 22:17:43,176 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:43,176 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:43,177 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,214 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:43,218 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 22:17:43,219 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:43,220 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:43,220 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:43,221 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:43,221 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:43,221 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:43,222 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:43,222 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:43,225 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:43,225 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:43,226 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:43,226 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:43,226 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:43,226 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:43,226 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:43,227 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:43,227 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:43,228 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:43,228 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 [2018-12-02 22:17:43,229 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:43,229 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:43,229 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:43,229 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:43,229 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:43,229 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:43,229 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:43,230 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:43,231 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:43,231 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:43,231 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:43,232 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:43,232 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:43,232 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:43,232 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:43,232 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:43,233 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:43,234 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:43,234 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:43,234 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:43,234 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:43,234 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:43,234 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:43,235 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:43,235 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:43,240 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 22:17:43,243 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 22:17:43,243 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 22:17:43,244 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 22:17:43,244 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 22:17:43,244 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 22:17:43,245 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-12-02 22:17:43,246 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 22:17:43,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:43,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:43,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:43,308 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-12-02 22:17:43,308 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-12-02 22:17:43,378 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2018-12-02 22:17:43,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-02 22:17:43,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-12-02 22:17:43,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-12-02 22:17:43,382 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:43,382 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-12-02 22:17:43,383 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:43,383 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-12-02 22:17:43,383 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:43,383 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-12-02 22:17:43,386 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 22:17:43,389 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-12-02 22:17:43,390 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-12-02 22:17:43,390 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-12-02 22:17:43,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-12-02 22:17:43,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:43,392 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-12-02 22:17:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-12-02 22:17:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-12-02 22:17:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-02 22:17:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-12-02 22:17:43,410 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-02 22:17:43,410 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-02 22:17:43,410 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-02 22:17:43,410 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-12-02 22:17:43,410 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 22:17:43,410 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:43,411 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:43,411 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:17:43,411 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:17:43,411 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-12-02 22:17:43,412 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2018-12-02 22:17:43,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:43,412 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-12-02 22:17:43,412 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:43,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:43,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:43,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:43,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 22:17:43,467 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:17:43,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 22:17:43,469 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 22:17:43,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-12-02 22:17:43,470 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:43,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:43,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:43,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:43,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 22:17:43,497 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:17:43,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 22:17:43,497 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-12-02 22:17:43,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 22:17:43,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:17:43,500 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-12-02 22:17:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:17:43,542 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-12-02 22:17:43,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 22:17:43,543 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-12-02 22:17:43,544 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 22:17:43,545 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-12-02 22:17:43,545 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-12-02 22:17:43,545 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-12-02 22:17:43,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-12-02 22:17:43,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:43,546 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-12-02 22:17:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-12-02 22:17:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-02 22:17:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-02 22:17:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-12-02 22:17:43,549 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-12-02 22:17:43,549 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-12-02 22:17:43,549 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-02 22:17:43,549 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-12-02 22:17:43,550 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-12-02 22:17:43,550 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:43,550 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:43,551 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:17:43,551 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-12-02 22:17:43,551 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-12-02 22:17:43,551 INFO L796 eck$LassoCheckResult]: Loop: 182#L11-1 call #t~ret1 := fibo(~n - 2);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume !(1 == ~n); 193#L11 call #t~ret0 := fibo(~n - 1);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume 1 == ~n;#res := 1; 199#fiboFINAL assume true; 197#fiboEXIT >#32#return; 182#L11-1 [2018-12-02 22:17:43,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:43,552 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-12-02 22:17:43,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:43,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:43,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:43,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:43,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:43,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:17:43,575 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:17:43,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:43,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:43,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:17:43,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-02 22:17:43,610 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 22:17:43,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-12-02 22:17:43,611 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:43,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:43,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:43,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:43,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:43,675 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:43,676 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:43,676 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:43,676 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:43,676 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 22:17:43,676 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,676 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:43,676 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:43,676 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration3_Loop [2018-12-02 22:17:43,676 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:43,676 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:43,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:43,711 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:43,711 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,714 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:43,714 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:43,732 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 22:17:43,732 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:44,216 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 22:17:44,217 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:44,217 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:44,218 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:44,218 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:44,218 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 22:17:44,218 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:44,218 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:44,218 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:44,218 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration3_Loop [2018-12-02 22:17:44,218 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:44,218 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:44,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:44,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:44,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:44,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:44,262 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:44,262 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 22:17:44,263 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:44,263 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:44,263 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:44,264 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:44,264 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:44,264 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:44,264 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:44,264 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:44,266 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:44,266 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:44,267 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:44,267 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:44,267 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:44,267 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:44,267 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:44,268 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:44,268 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:44,271 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 22:17:44,274 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 22:17:44,274 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 22:17:44,274 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 22:17:44,274 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 22:17:44,274 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 22:17:44,274 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-02 22:17:44,275 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 22:17:44,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:44,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:44,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:44,356 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-12-02 22:17:44,356 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-12-02 22:17:44,457 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2018-12-02 22:17:44,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-02 22:17:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-12-02 22:17:44,458 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-12-02 22:17:44,458 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:44,458 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-12-02 22:17:44,459 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:44,459 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-12-02 22:17:44,459 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:44,459 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-12-02 22:17:44,463 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-02 22:17:44,466 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-12-02 22:17:44,466 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-12-02 22:17:44,466 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-12-02 22:17:44,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-12-02 22:17:44,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:44,467 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-12-02 22:17:44,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-12-02 22:17:44,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-12-02 22:17:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-02 22:17:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-12-02 22:17:44,475 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-12-02 22:17:44,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 22:17:44,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 22:17:44,475 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-12-02 22:17:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:17:44,525 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-12-02 22:17:44,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 22:17:44,526 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-12-02 22:17:44,528 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-02 22:17:44,530 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-12-02 22:17:44,530 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-12-02 22:17:44,530 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-12-02 22:17:44,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-12-02 22:17:44,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:44,530 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-12-02 22:17:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-12-02 22:17:44,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-12-02 22:17:44,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-02 22:17:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-12-02 22:17:44,536 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-12-02 22:17:44,537 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-12-02 22:17:44,537 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-02 22:17:44,537 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-12-02 22:17:44,538 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-02 22:17:44,538 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:44,538 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:44,539 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 22:17:44,539 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-12-02 22:17:44,539 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 704#L25 call main_#t~ret2 := fibo(main_~x~0);< 726#fiboENTRY ~n := #in~n; 748#L6 assume !(~n < 1); 707#L8 assume !(1 == ~n); 708#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 720#L6 assume !(~n < 1); 752#L8 assume 1 == ~n;#res := 1; 751#fiboFINAL assume true; 750#fiboEXIT >#32#return; 710#L11-1 call #t~ret1 := fibo(~n - 2);< 749#fiboENTRY ~n := #in~n; 777#L6 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 773#fiboEXIT >#34#return; 772#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 771#fiboFINAL assume true; 759#fiboEXIT >#32#return; 760#L11-1 [2018-12-02 22:17:44,539 INFO L796 eck$LassoCheckResult]: Loop: 760#L11-1 call #t~ret1 := fibo(~n - 2);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume !(1 == ~n); 763#L11 call #t~ret0 := fibo(~n - 1);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume 1 == ~n;#res := 1; 769#fiboFINAL assume true; 770#fiboEXIT >#32#return; 760#L11-1 [2018-12-02 22:17:44,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-12-02 22:17:44,539 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:44,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:44,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:44,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:44,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-02 22:17:44,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:17:44,596 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:17:44,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:44,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-02 22:17:44,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:17:44,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-02 22:17:44,628 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 22:17:44,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:44,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-12-02 22:17:44,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:44,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:44,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:44,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:44,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:44,694 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:44,694 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:44,694 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:44,694 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:44,694 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 22:17:44,694 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:44,695 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:44,695 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:44,695 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration4_Loop [2018-12-02 22:17:44,695 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:44,695 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:44,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:44,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:44,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:44,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:44,724 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:44,724 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:44,725 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:44,725 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:44,742 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 22:17:44,742 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:45,226 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 22:17:45,227 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:45,228 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:45,228 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:45,228 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:45,228 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 22:17:45,228 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:45,228 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:45,228 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:45,228 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration4_Loop [2018-12-02 22:17:45,228 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:45,228 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:45,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:45,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:45,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:45,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:45,263 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:45,263 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 22:17:45,264 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:45,264 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:45,264 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:45,264 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:45,264 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:45,264 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:45,264 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:45,265 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:45,265 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:45,265 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:45,265 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:45,266 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:45,266 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:45,266 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:45,266 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:45,266 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:45,266 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:45,266 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:45,267 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:45,267 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:45,267 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:45,267 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:45,267 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:45,267 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:45,267 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:45,267 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:45,268 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:45,269 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:45,269 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:45,269 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:45,269 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:45,269 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:45,269 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:45,270 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:45,270 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:45,272 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 22:17:45,274 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 22:17:45,274 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 22:17:45,275 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 22:17:45,275 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 22:17:45,275 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 22:17:45,275 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-02 22:17:45,275 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 22:17:45,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:45,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:45,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:45,346 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-12-02 22:17:45,347 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-12-02 22:17:45,444 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 162 states and 216 transitions. Complement of second has 25 states. [2018-12-02 22:17:45,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-02 22:17:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-12-02 22:17:45,445 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-12-02 22:17:45,446 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:45,446 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:45,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:45,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:45,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:45,522 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-12-02 22:17:45,522 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-12-02 22:17:45,596 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 287 states and 386 transitions. Complement of second has 25 states. [2018-12-02 22:17:45,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-02 22:17:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-12-02 22:17:45,597 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-12-02 22:17:45,597 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:45,597 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:45,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:45,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:45,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:45,662 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-12-02 22:17:45,662 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-12-02 22:17:45,773 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 825 states and 1090 transitions. Complement of second has 112 states. [2018-12-02 22:17:45,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:45,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-12-02 22:17:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-12-02 22:17:45,774 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-12-02 22:17:45,774 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:45,774 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-12-02 22:17:45,775 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:45,775 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-12-02 22:17:45,775 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:45,776 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-12-02 22:17:45,783 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-12-02 22:17:45,788 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-12-02 22:17:45,788 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-12-02 22:17:45,788 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-12-02 22:17:45,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-12-02 22:17:45,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:45,789 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-12-02 22:17:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-12-02 22:17:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-12-02 22:17:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-12-02 22:17:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-12-02 22:17:45,806 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-12-02 22:17:45,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 22:17:45,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-12-02 22:17:45,806 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-12-02 22:17:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:17:45,907 INFO L93 Difference]: Finished difference Result 497 states and 785 transitions. [2018-12-02 22:17:45,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 22:17:45,908 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 785 transitions. [2018-12-02 22:17:45,914 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-12-02 22:17:45,922 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 782 transitions. [2018-12-02 22:17:45,922 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-12-02 22:17:45,923 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-12-02 22:17:45,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 782 transitions. [2018-12-02 22:17:45,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:45,923 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 782 transitions. [2018-12-02 22:17:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 782 transitions. [2018-12-02 22:17:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 369. [2018-12-02 22:17:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-12-02 22:17:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 522 transitions. [2018-12-02 22:17:45,944 INFO L728 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-12-02 22:17:45,944 INFO L608 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-12-02 22:17:45,944 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-02 22:17:45,944 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 522 transitions. [2018-12-02 22:17:45,946 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-12-02 22:17:45,946 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:45,946 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:45,947 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-12-02 22:17:45,947 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 22:17:45,947 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3588#fiboENTRY ~n := #in~n; 3605#L6 assume !(~n < 1); 3604#L8 assume !(1 == ~n); 3599#L11 call #t~ret0 := fibo(~n - 1);< 3603#fiboENTRY ~n := #in~n; 3601#L6 assume !(~n < 1); 3602#L8 assume !(1 == ~n); 3557#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3600#L8 assume !(1 == ~n); 3556#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3597#L6 assume !(~n < 1); 3555#L8 assume 1 == ~n;#res := 1; 3558#fiboFINAL assume true; 3677#fiboEXIT >#32#return; 3622#L11-1 call #t~ret1 := fibo(~n - 2);< 3623#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3660#L8 assume !(1 == ~n); 3662#L11 call #t~ret0 := fibo(~n - 1);< 3873#fiboENTRY ~n := #in~n; 3888#L6 assume !(~n < 1); 3886#L8 assume !(1 == ~n); 3594#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-12-02 22:17:45,947 INFO L796 eck$LassoCheckResult]: Loop: 3591#fiboENTRY ~n := #in~n; 3595#L6 assume !(~n < 1); 3615#L8 assume !(1 == ~n); 3592#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-12-02 22:17:45,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-12-02 22:17:45,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:45,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:45,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:45,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:45,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-12-02 22:17:45,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:17:45,987 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:17:45,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:46,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 22:17:46,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:17:46,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-12-02 22:17:46,066 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 22:17:46,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:46,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-12-02 22:17:46,067 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:46,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:46,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:46,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:17:46,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:46,086 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:46,086 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:46,086 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:46,086 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:46,086 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 22:17:46,086 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:46,086 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:46,086 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:46,086 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration5_Loop [2018-12-02 22:17:46,086 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:46,087 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:46,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,111 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:46,111 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:46,113 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:46,113 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:46,115 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 22:17:46,115 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:46,130 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:46,130 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:46,146 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 22:17:46,146 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:46,161 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 22:17:46,163 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:46,163 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:46,163 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:46,163 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:46,163 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 22:17:46,163 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:46,163 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:46,163 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:46,164 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration5_Loop [2018-12-02 22:17:46,164 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:46,164 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:46,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,180 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,202 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:46,202 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 22:17:46,203 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:46,203 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:46,203 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:46,203 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:46,203 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:46,203 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:46,203 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:46,203 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:46,205 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 22:17:46,206 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 22:17:46,206 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 22:17:46,206 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 22:17:46,207 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 22:17:46,207 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 22:17:46,207 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-12-02 22:17:46,207 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 22:17:46,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:46,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:46,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:46,266 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-02 22:17:46,266 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-12-02 22:17:46,303 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-12-02 22:17:46,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 22:17:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-12-02 22:17:46,304 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-12-02 22:17:46,304 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:46,304 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:46,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:46,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:46,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:46,369 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-02 22:17:46,369 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-12-02 22:17:46,402 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-12-02 22:17:46,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 22:17:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-12-02 22:17:46,403 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-12-02 22:17:46,403 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:46,403 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:46,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:46,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:46,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:46,456 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-02 22:17:46,456 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-12-02 22:17:46,520 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 494 states and 656 transitions. Complement of second has 14 states. [2018-12-02 22:17:46,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-02 22:17:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-12-02 22:17:46,521 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-12-02 22:17:46,521 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:46,521 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-12-02 22:17:46,521 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:46,521 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-12-02 22:17:46,521 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:46,521 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 494 states and 656 transitions. [2018-12-02 22:17:46,524 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-12-02 22:17:46,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 494 states to 407 states and 567 transitions. [2018-12-02 22:17:46,527 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-12-02 22:17:46,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 162 [2018-12-02 22:17:46,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 567 transitions. [2018-12-02 22:17:46,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:46,527 INFO L705 BuchiCegarLoop]: Abstraction has 407 states and 567 transitions. [2018-12-02 22:17:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states and 567 transitions. [2018-12-02 22:17:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2018-12-02 22:17:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-12-02 22:17:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 546 transitions. [2018-12-02 22:17:46,537 INFO L728 BuchiCegarLoop]: Abstraction has 393 states and 546 transitions. [2018-12-02 22:17:46,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-02 22:17:46,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-12-02 22:17:46,537 INFO L87 Difference]: Start difference. First operand 393 states and 546 transitions. Second operand 14 states. [2018-12-02 22:17:46,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:17:46,664 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2018-12-02 22:17:46,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 22:17:46,665 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 274 states and 348 transitions. [2018-12-02 22:17:46,666 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:46,668 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 274 states to 244 states and 313 transitions. [2018-12-02 22:17:46,668 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 119 [2018-12-02 22:17:46,668 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-12-02 22:17:46,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 244 states and 313 transitions. [2018-12-02 22:17:46,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:46,668 INFO L705 BuchiCegarLoop]: Abstraction has 244 states and 313 transitions. [2018-12-02 22:17:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states and 313 transitions. [2018-12-02 22:17:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 203. [2018-12-02 22:17:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-12-02 22:17:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-12-02 22:17:46,672 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-12-02 22:17:46,672 INFO L608 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-12-02 22:17:46,672 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-02 22:17:46,672 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 203 states and 260 transitions. [2018-12-02 22:17:46,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:46,673 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:46,673 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:46,673 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-02 22:17:46,674 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 22:17:46,674 INFO L794 eck$LassoCheckResult]: Stem: 6303#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 6304#L25 call main_#t~ret2 := fibo(main_~x~0);< 6333#fiboENTRY ~n := #in~n; 6400#L6 assume !(~n < 1); 6399#L8 assume !(1 == ~n); 6395#L11 call #t~ret0 := fibo(~n - 1);< 6398#fiboENTRY ~n := #in~n; 6397#L6 assume !(~n < 1); 6396#L8 assume !(1 == ~n); 6390#L11 call #t~ret0 := fibo(~n - 1);< 6394#fiboENTRY ~n := #in~n; 6392#L6 assume !(~n < 1); 6393#L8 assume !(1 == ~n); 6323#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6384#L6 assume !(~n < 1); 6385#L8 assume 1 == ~n;#res := 1; 6497#fiboFINAL assume true; 6496#fiboEXIT >#32#return; 6298#L11-1 call #t~ret1 := fibo(~n - 2);< 6318#fiboENTRY ~n := #in~n; 6319#L6 assume ~n < 1;#res := 0; 6499#fiboFINAL assume true; 6297#fiboEXIT >#34#return; 6299#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 6471#fiboFINAL assume true; 6470#fiboEXIT >#32#return; 6330#L11-1 call #t~ret1 := fibo(~n - 2);< 6401#fiboENTRY ~n := #in~n; 6404#L6 assume !(~n < 1); 6484#L8 assume !(1 == ~n); 6306#L11 call #t~ret0 := fibo(~n - 1);< 6327#fiboENTRY ~n := #in~n; 6380#L6 assume !(~n < 1); 6370#L8 assume !(1 == ~n); 6352#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-12-02 22:17:46,674 INFO L796 eck$LassoCheckResult]: Loop: 6350#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-12-02 22:17:46,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:46,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1642551253, now seen corresponding path program 2 times [2018-12-02 22:17:46,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:46,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:46,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:46,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:46,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-02 22:17:46,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:17:46,720 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/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 [2018-12-02 22:17:46,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 22:17:46,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 22:17:46,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:17:46,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-02 22:17:46,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:17:46,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-12-02 22:17:46,824 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 22:17:46,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:46,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2018-12-02 22:17:46,824 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:46,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:46,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:46,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:46,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:46,853 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:46,854 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:46,854 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:46,854 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:46,854 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 22:17:46,854 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:46,854 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:46,854 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:46,854 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration6_Loop [2018-12-02 22:17:46,854 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:46,854 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:46,855 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:46,882 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:46,882 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/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 [2018-12-02 22:17:46,884 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:46,884 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:46,886 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 22:17:46,886 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/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 [2018-12-02 22:17:46,901 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:46,901 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/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 [2018-12-02 22:17:46,919 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 22:17:46,919 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:52,265 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 22:17:52,267 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:52,268 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:52,268 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:52,268 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:52,268 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 22:17:52,268 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:52,268 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:52,268 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:52,268 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration6_Loop [2018-12-02 22:17:52,268 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:52,268 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:52,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:52,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:52,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:52,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:52,301 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:52,301 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 22:17:52,302 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:52,302 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:52,302 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:52,302 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:52,302 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:52,302 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:52,303 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:52,303 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:52,304 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 22:17:52,306 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 22:17:52,306 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 22:17:52,307 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 22:17:52,307 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 22:17:52,307 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 22:17:52,307 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-02 22:17:52,307 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 22:17:52,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:52,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:52,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:52,401 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 [2018-12-02 22:17:52,401 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-12-02 22:17:52,431 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 215 states and 273 transitions. Complement of second has 18 states. [2018-12-02 22:17:52,431 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 [2018-12-02 22:17:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:17:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-12-02 22:17:52,431 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 47 letters. Loop has 4 letters. [2018-12-02 22:17:52,431 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:52,431 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:52,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:52,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:52,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:52,498 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 [2018-12-02 22:17:52,498 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-12-02 22:17:52,539 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 221 states and 279 transitions. Complement of second has 17 states. [2018-12-02 22:17:52,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:17:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-12-02 22:17:52,539 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2018-12-02 22:17:52,539 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:52,540 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:52,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:52,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:52,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:52,610 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 [2018-12-02 22:17:52,610 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-12-02 22:17:52,648 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 271 states and 343 transitions. Complement of second has 27 states. [2018-12-02 22:17:52,648 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 [2018-12-02 22:17:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:17:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-12-02 22:17:52,648 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 4 letters. [2018-12-02 22:17:52,649 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:52,649 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2018-12-02 22:17:52,649 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:52,649 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 8 letters. [2018-12-02 22:17:52,650 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:52,650 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 271 states and 343 transitions. [2018-12-02 22:17:52,652 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:52,653 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 271 states to 207 states and 265 transitions. [2018-12-02 22:17:52,653 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 79 [2018-12-02 22:17:52,653 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2018-12-02 22:17:52,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 265 transitions. [2018-12-02 22:17:52,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:52,653 INFO L705 BuchiCegarLoop]: Abstraction has 207 states and 265 transitions. [2018-12-02 22:17:52,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states and 265 transitions. [2018-12-02 22:17:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-12-02 22:17:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-12-02 22:17:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-12-02 22:17:52,656 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-12-02 22:17:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-02 22:17:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-12-02 22:17:52,657 INFO L87 Difference]: Start difference. First operand 203 states and 260 transitions. Second operand 20 states. [2018-12-02 22:17:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:17:52,831 INFO L93 Difference]: Finished difference Result 341 states and 458 transitions. [2018-12-02 22:17:52,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-02 22:17:52,831 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 341 states and 458 transitions. [2018-12-02 22:17:52,833 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:52,835 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 341 states to 315 states and 426 transitions. [2018-12-02 22:17:52,835 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2018-12-02 22:17:52,835 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-12-02 22:17:52,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 315 states and 426 transitions. [2018-12-02 22:17:52,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:52,836 INFO L705 BuchiCegarLoop]: Abstraction has 315 states and 426 transitions. [2018-12-02 22:17:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states and 426 transitions. [2018-12-02 22:17:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 282. [2018-12-02 22:17:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-12-02 22:17:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 383 transitions. [2018-12-02 22:17:52,843 INFO L728 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-12-02 22:17:52,843 INFO L608 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-12-02 22:17:52,843 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-12-02 22:17:52,843 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 282 states and 383 transitions. [2018-12-02 22:17:52,844 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:52,844 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:52,844 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:52,845 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2018-12-02 22:17:52,846 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 22:17:52,846 INFO L794 eck$LassoCheckResult]: Stem: 8505#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 8506#L25 call main_#t~ret2 := fibo(main_~x~0);< 8545#fiboENTRY ~n := #in~n; 8605#L6 assume !(~n < 1); 8603#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8601#fiboENTRY ~n := #in~n; 8616#L6 assume !(~n < 1); 8614#L8 assume !(1 == ~n); 8610#L11 call #t~ret0 := fibo(~n - 1);< 8613#fiboENTRY ~n := #in~n; 8668#L6 assume !(~n < 1); 8665#L8 assume !(1 == ~n); 8607#L11 call #t~ret0 := fibo(~n - 1);< 8611#fiboENTRY ~n := #in~n; 8629#L6 assume !(~n < 1); 8626#L8 assume !(1 == ~n); 8532#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8725#L6 assume !(~n < 1); 8723#L8 assume !(1 == ~n); 8533#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8725#L6 assume !(~n < 1); 8723#L8 assume !(1 == ~n); 8533#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8725#L6 assume !(~n < 1); 8723#L8 assume !(1 == ~n); 8533#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8727#L6 assume !(~n < 1); 8772#L8 assume 1 == ~n;#res := 1; 8771#fiboFINAL assume true; 8770#fiboEXIT >#32#return; 8531#L11-1 call #t~ret1 := fibo(~n - 2);< 8534#fiboENTRY ~n := #in~n; 8766#L6 assume ~n < 1;#res := 0; 8765#fiboFINAL assume true; 8760#fiboEXIT >#34#return; 8758#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 8756#fiboFINAL assume true; 8750#fiboEXIT >#32#return; 8740#L11-1 call #t~ret1 := fibo(~n - 2);< 8743#fiboENTRY ~n := #in~n; 8769#L6 assume !(~n < 1); 8768#L8 assume 1 == ~n;#res := 1; 8550#fiboFINAL assume true; 8739#fiboEXIT >#34#return; 8737#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 8735#fiboFINAL assume true; 8733#fiboEXIT >#32#return; 8549#L11-1 call #t~ret1 := fibo(~n - 2);< 8621#fiboENTRY ~n := #in~n; 8557#L6 assume !(~n < 1); 8546#L8 assume !(1 == ~n); 8496#L11 call #t~ret0 := fibo(~n - 1);< 8528#fiboENTRY ~n := #in~n; 8529#L6 assume !(~n < 1); 8513#L8 assume !(1 == ~n); 8514#L11 call #t~ret0 := fibo(~n - 1);< 8562#fiboENTRY ~n := #in~n; 8580#L6 assume !(~n < 1); 8579#L8 assume !(1 == ~n); 8560#L11 [2018-12-02 22:17:52,846 INFO L796 eck$LassoCheckResult]: Loop: 8560#L11 call #t~ret0 := fibo(~n - 1);< 8562#fiboENTRY ~n := #in~n; 8580#L6 assume !(~n < 1); 8579#L8 assume !(1 == ~n); 8560#L11 [2018-12-02 22:17:52,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:52,846 INFO L82 PathProgramCache]: Analyzing trace with hash 973756610, now seen corresponding path program 3 times [2018-12-02 22:17:52,846 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:52,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:52,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:52,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:52,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-02 22:17:52,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:17:52,909 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/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 [2018-12-02 22:17:52,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 22:17:52,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-02 22:17:52,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:17:52,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-12-02 22:17:52,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:17:52,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-02 22:17:52,951 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 22:17:52,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:52,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2018-12-02 22:17:52,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:52,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:52,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:52,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:52,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:52,981 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:52,981 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:52,981 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:52,981 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:52,981 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 22:17:52,981 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:52,981 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:52,981 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:52,981 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration7_Loop [2018-12-02 22:17:52,981 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:52,981 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:52,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:52,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:52,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:52,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:53,011 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:53,011 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/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 [2018-12-02 22:17:53,013 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:53,013 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:53,017 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 22:17:53,017 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/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 [2018-12-02 22:17:53,033 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:53,033 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/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 [2018-12-02 22:17:53,052 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 22:17:53,052 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:53,813 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 22:17:53,815 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:53,815 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:53,815 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:53,816 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:53,816 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 22:17:53,816 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:53,816 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:53,816 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:53,816 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration7_Loop [2018-12-02 22:17:53,816 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:53,816 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:53,816 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:53,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:53,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:53,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:53,850 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:53,850 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 22:17:53,850 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:53,851 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:53,851 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:53,851 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:53,851 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:53,851 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:53,851 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:53,851 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:53,852 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:53,852 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:53,852 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:53,852 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:53,852 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:53,852 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:53,852 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:53,852 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:53,852 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:53,853 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 22:17:53,854 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 22:17:53,855 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 22:17:53,855 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 22:17:53,855 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 22:17:53,855 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 22:17:53,855 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-02 22:17:53,855 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 22:17:53,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:53,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:53,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:53,931 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 [2018-12-02 22:17:53,932 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-12-02 22:17:53,967 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 297 states and 399 transitions. Complement of second has 18 states. [2018-12-02 22:17:53,967 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 [2018-12-02 22:17:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:17:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-12-02 22:17:53,968 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 64 letters. Loop has 4 letters. [2018-12-02 22:17:53,968 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:53,968 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:53,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:54,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:54,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:54,051 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 [2018-12-02 22:17:54,051 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-12-02 22:17:54,090 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 303 states and 405 transitions. Complement of second has 17 states. [2018-12-02 22:17:54,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:17:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-12-02 22:17:54,091 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 64 letters. Loop has 4 letters. [2018-12-02 22:17:54,091 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:54,091 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:54,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:54,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:54,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:54,165 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 [2018-12-02 22:17:54,166 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-12-02 22:17:54,204 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 361 states and 481 transitions. Complement of second has 27 states. [2018-12-02 22:17:54,204 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 [2018-12-02 22:17:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:17:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-12-02 22:17:54,205 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 4 letters. [2018-12-02 22:17:54,205 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:54,205 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 4 letters. [2018-12-02 22:17:54,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:54,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 8 letters. [2018-12-02 22:17:54,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:54,206 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 361 states and 481 transitions. [2018-12-02 22:17:54,209 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:54,211 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 361 states to 286 states and 388 transitions. [2018-12-02 22:17:54,212 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2018-12-02 22:17:54,212 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 128 [2018-12-02 22:17:54,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 286 states and 388 transitions. [2018-12-02 22:17:54,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:54,212 INFO L705 BuchiCegarLoop]: Abstraction has 286 states and 388 transitions. [2018-12-02 22:17:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states and 388 transitions. [2018-12-02 22:17:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2018-12-02 22:17:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-12-02 22:17:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 383 transitions. [2018-12-02 22:17:54,219 INFO L728 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-12-02 22:17:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 22:17:54,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-12-02 22:17:54,220 INFO L87 Difference]: Start difference. First operand 282 states and 383 transitions. Second operand 11 states. [2018-12-02 22:17:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:17:54,319 INFO L93 Difference]: Finished difference Result 399 states and 573 transitions. [2018-12-02 22:17:54,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 22:17:54,319 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 399 states and 573 transitions. [2018-12-02 22:17:54,323 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:54,327 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 399 states to 377 states and 547 transitions. [2018-12-02 22:17:54,327 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 180 [2018-12-02 22:17:54,327 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 192 [2018-12-02 22:17:54,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 377 states and 547 transitions. [2018-12-02 22:17:54,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:54,328 INFO L705 BuchiCegarLoop]: Abstraction has 377 states and 547 transitions. [2018-12-02 22:17:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states and 547 transitions. [2018-12-02 22:17:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 320. [2018-12-02 22:17:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-12-02 22:17:54,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 462 transitions. [2018-12-02 22:17:54,338 INFO L728 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-12-02 22:17:54,338 INFO L608 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-12-02 22:17:54,338 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-12-02 22:17:54,338 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 320 states and 462 transitions. [2018-12-02 22:17:54,339 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:54,339 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:54,339 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:54,340 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [17, 15, 12, 11, 9, 5, 5, 4, 4, 3, 2, 1, 1] [2018-12-02 22:17:54,341 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 22:17:54,341 INFO L794 eck$LassoCheckResult]: Stem: 11349#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 11350#L25 call main_#t~ret2 := fibo(main_~x~0);< 11387#fiboENTRY ~n := #in~n; 11464#L6 assume !(~n < 1); 11462#L8 assume !(1 == ~n); 11459#L11 call #t~ret0 := fibo(~n - 1);< 11460#fiboENTRY ~n := #in~n; 11474#L6 assume !(~n < 1); 11472#L8 assume !(1 == ~n); 11469#L11 call #t~ret0 := fibo(~n - 1);< 11470#fiboENTRY ~n := #in~n; 11482#L6 assume !(~n < 1); 11481#L8 assume !(1 == ~n); 11466#L11 call #t~ret0 := fibo(~n - 1);< 11480#fiboENTRY ~n := #in~n; 11489#L6 assume !(~n < 1); 11486#L8 assume !(1 == ~n); 11406#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11490#L6 assume !(~n < 1); 11487#L8 assume !(1 == ~n); 11405#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11490#L6 assume !(~n < 1); 11487#L8 assume !(1 == ~n); 11405#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11490#L6 assume !(~n < 1); 11487#L8 assume !(1 == ~n); 11405#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11490#L6 assume !(~n < 1); 11487#L8 assume !(1 == ~n); 11405#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11493#L6 assume !(~n < 1); 11611#L8 assume 1 == ~n;#res := 1; 11610#fiboFINAL assume true; 11608#fiboEXIT >#32#return; 11605#L11-1 call #t~ret1 := fibo(~n - 2);< 11606#fiboENTRY ~n := #in~n; 11609#L6 assume ~n < 1;#res := 0; 11607#fiboFINAL assume true; 11604#fiboEXIT >#34#return; 11602#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 11601#fiboFINAL assume true; 11599#fiboEXIT >#32#return; 11578#L11-1 call #t~ret1 := fibo(~n - 2);< 11580#fiboENTRY ~n := #in~n; 11595#L6 assume !(~n < 1); 11594#L8 assume 1 == ~n;#res := 1; 11492#fiboFINAL assume true; 11577#fiboEXIT >#34#return; 11574#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 11563#fiboFINAL assume true; 11558#fiboEXIT >#32#return; 11559#L11-1 call #t~ret1 := fibo(~n - 2);< 11562#fiboENTRY ~n := #in~n; 11596#L6 assume !(~n < 1); 11592#L8 assume !(1 == ~n); 11593#L11 call #t~ret0 := fibo(~n - 1);< 11619#fiboENTRY ~n := #in~n; 11622#L6 assume !(~n < 1); 11621#L8 assume 1 == ~n;#res := 1; 11620#fiboFINAL assume true; 11617#fiboEXIT >#32#return; 11569#L11-1 call #t~ret1 := fibo(~n - 2);< 11571#fiboENTRY ~n := #in~n; 11582#L6 assume ~n < 1;#res := 0; 11581#fiboFINAL assume true; 11568#fiboEXIT >#34#return; 11567#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 11565#fiboFINAL assume true; 11560#fiboEXIT >#34#return; 11478#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 11485#fiboFINAL assume true; 11475#fiboEXIT >#32#return; 11397#L11-1 call #t~ret1 := fibo(~n - 2);< 11402#fiboENTRY ~n := #in~n; 11395#L6 assume !(~n < 1); 11399#L8 assume !(1 == ~n); 11357#L11 call #t~ret0 := fibo(~n - 1);< 11618#fiboENTRY ~n := #in~n; 11623#L6 assume !(~n < 1); 11354#L8 assume !(1 == ~n); 11358#L11 call #t~ret0 := fibo(~n - 1);< 11383#fiboENTRY ~n := #in~n; 11660#L6 assume !(~n < 1); 11652#L8 assume !(1 == ~n); 11630#L11 [2018-12-02 22:17:54,341 INFO L796 eck$LassoCheckResult]: Loop: 11630#L11 call #t~ret0 := fibo(~n - 1);< 11383#fiboENTRY ~n := #in~n; 11660#L6 assume !(~n < 1); 11652#L8 assume !(1 == ~n); 11630#L11 [2018-12-02 22:17:54,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:54,341 INFO L82 PathProgramCache]: Analyzing trace with hash -789040214, now seen corresponding path program 4 times [2018-12-02 22:17:54,341 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:54,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:54,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:54,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:54,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 202 proven. 76 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-12-02 22:17:54,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:17:54,416 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:17:54,424 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 22:17:54,440 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 22:17:54,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:17:54,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 159 proven. 267 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-12-02 22:17:54,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:17:54,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 23 [2018-12-02 22:17:54,552 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-02 22:17:54,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 5 times [2018-12-02 22:17:54,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:54,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:54,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:54,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:54,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:54,574 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:54,574 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:54,574 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:54,574 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:54,574 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 22:17:54,574 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:54,574 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:54,574 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:54,574 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration8_Loop [2018-12-02 22:17:54,574 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:54,574 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:54,575 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:54,576 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:54,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:54,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:54,599 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:54,600 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:54,602 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:54,602 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:54,604 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 22:17:54,604 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:54,619 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:54,619 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:54,621 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-02 22:17:54,621 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_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:54,636 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:54,636 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:54,654 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 22:17:54,654 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:17:55,341 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 22:17:55,344 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:55,344 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:55,344 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:55,344 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:55,344 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 22:17:55,344 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:55,344 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:55,344 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:55,344 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration8_Loop [2018-12-02 22:17:55,344 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:55,344 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:55,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:55,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:55,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:55,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:55,372 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:55,372 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 22:17:55,372 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:55,372 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:55,372 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:55,372 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:55,372 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:55,373 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:55,373 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:55,373 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:55,373 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:55,373 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:55,373 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:55,374 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:55,374 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:55,374 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:55,374 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:55,374 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:55,374 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:55,374 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:55,375 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:55,375 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:55,375 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:55,375 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:55,375 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:55,375 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:55,375 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:55,375 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:55,376 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-02 22:17:55,376 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:17:55,376 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:17:55,376 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:17:55,376 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:17:55,376 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:17:55,376 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:17:55,377 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:17:55,377 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:17:55,378 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 22:17:55,379 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 22:17:55,380 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 22:17:55,380 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 22:17:55,380 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 22:17:55,380 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 22:17:55,380 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-02 22:17:55,380 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 22:17:55,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:55,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:55,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:55,477 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 [2018-12-02 22:17:55,477 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146 Second operand 6 states. [2018-12-02 22:17:55,503 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146. Second operand 6 states. Result 335 states and 478 transitions. Complement of second has 18 states. [2018-12-02 22:17:55,504 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 [2018-12-02 22:17:55,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:17:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-12-02 22:17:55,504 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 89 letters. Loop has 4 letters. [2018-12-02 22:17:55,504 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:55,504 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:55,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:55,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:55,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:55,585 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 [2018-12-02 22:17:55,585 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146 Second operand 6 states. [2018-12-02 22:17:55,636 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146. Second operand 6 states. Result 341 states and 484 transitions. Complement of second has 17 states. [2018-12-02 22:17:55,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-12-02 22:17:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:17:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-12-02 22:17:55,636 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 89 letters. Loop has 4 letters. [2018-12-02 22:17:55,636 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:55,636 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:17:55,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:55,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:55,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:17:55,751 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 [2018-12-02 22:17:55,751 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146 Second operand 6 states. [2018-12-02 22:17:55,799 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146. Second operand 6 states. Result 398 states and 562 transitions. Complement of second has 27 states. [2018-12-02 22:17:55,799 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 [2018-12-02 22:17:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:17:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-12-02 22:17:55,799 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 89 letters. Loop has 4 letters. [2018-12-02 22:17:55,800 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:55,800 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 93 letters. Loop has 4 letters. [2018-12-02 22:17:55,800 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:55,800 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 89 letters. Loop has 8 letters. [2018-12-02 22:17:55,800 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:17:55,801 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 398 states and 562 transitions. [2018-12-02 22:17:55,803 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:55,814 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 398 states to 320 states and 462 transitions. [2018-12-02 22:17:55,814 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 137 [2018-12-02 22:17:55,814 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 150 [2018-12-02 22:17:55,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 320 states and 462 transitions. [2018-12-02 22:17:55,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:55,815 INFO L705 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-12-02 22:17:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states and 462 transitions. [2018-12-02 22:17:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2018-12-02 22:17:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-12-02 22:17:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 462 transitions. [2018-12-02 22:17:55,822 INFO L728 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-12-02 22:17:55,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-02 22:17:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2018-12-02 22:17:55,823 INFO L87 Difference]: Start difference. First operand 320 states and 462 transitions. Second operand 23 states. [2018-12-02 22:17:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:17:56,159 INFO L93 Difference]: Finished difference Result 561 states and 861 transitions. [2018-12-02 22:17:56,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-02 22:17:56,160 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 561 states and 861 transitions. [2018-12-02 22:17:56,164 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:56,167 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 561 states to 547 states and 842 transitions. [2018-12-02 22:17:56,167 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 260 [2018-12-02 22:17:56,168 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2018-12-02 22:17:56,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 547 states and 842 transitions. [2018-12-02 22:17:56,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:17:56,168 INFO L705 BuchiCegarLoop]: Abstraction has 547 states and 842 transitions. [2018-12-02 22:17:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states and 842 transitions. [2018-12-02 22:17:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 442. [2018-12-02 22:17:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2018-12-02 22:17:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 678 transitions. [2018-12-02 22:17:56,177 INFO L728 BuchiCegarLoop]: Abstraction has 442 states and 678 transitions. [2018-12-02 22:17:56,177 INFO L608 BuchiCegarLoop]: Abstraction has 442 states and 678 transitions. [2018-12-02 22:17:56,177 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-12-02 22:17:56,177 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 442 states and 678 transitions. [2018-12-02 22:17:56,179 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:17:56,179 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-02 22:17:56,179 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-02 22:17:56,181 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [23, 20, 15, 15, 14, 8, 8, 7, 7, 5, 3, 1, 1] [2018-12-02 22:17:56,181 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-12-02 22:17:56,181 INFO L794 eck$LassoCheckResult]: Stem: 14872#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 14873#L25 call main_#t~ret2 := fibo(main_~x~0);< 14905#fiboENTRY ~n := #in~n; 15099#L6 assume !(~n < 1); 15095#L8 assume !(1 == ~n); 15070#L11 call #t~ret0 := fibo(~n - 1);< 15090#fiboENTRY ~n := #in~n; 15077#L6 assume !(~n < 1); 15074#L8 assume !(1 == ~n); 15059#L11 call #t~ret0 := fibo(~n - 1);< 15066#fiboENTRY ~n := #in~n; 15064#L6 assume !(~n < 1); 15062#L8 assume !(1 == ~n); 15054#L11 call #t~ret0 := fibo(~n - 1);< 15058#fiboENTRY ~n := #in~n; 15057#L6 assume !(~n < 1); 15055#L8 assume !(1 == ~n); 14953#L11 call #t~ret0 := fibo(~n - 1);< 14982#fiboENTRY ~n := #in~n; 14979#L6 assume !(~n < 1); 14976#L8 assume !(1 == ~n); 14932#L11 call #t~ret0 := fibo(~n - 1);< 14945#fiboENTRY ~n := #in~n; 14957#L6 assume !(~n < 1); 14955#L8 assume !(1 == ~n); 14933#L11 call #t~ret0 := fibo(~n - 1);< 14945#fiboENTRY ~n := #in~n; 14957#L6 assume !(~n < 1); 14955#L8 assume !(1 == ~n); 14933#L11 call #t~ret0 := fibo(~n - 1);< 14945#fiboENTRY ~n := #in~n; 14957#L6 assume !(~n < 1); 14955#L8 assume !(1 == ~n); 14933#L11 call #t~ret0 := fibo(~n - 1);< 14945#fiboENTRY ~n := #in~n; 14957#L6 assume !(~n < 1); 14955#L8 assume !(1 == ~n); 14933#L11 call #t~ret0 := fibo(~n - 1);< 14945#fiboENTRY ~n := #in~n; 14959#L6 assume !(~n < 1); 15218#L8 assume 1 == ~n;#res := 1; 15217#fiboFINAL assume true; 15216#fiboEXIT >#32#return; 15214#L11-1 call #t~ret1 := fibo(~n - 2);< 15215#fiboENTRY ~n := #in~n; 15227#L6 assume ~n < 1;#res := 0; 15224#fiboFINAL assume true; 15213#fiboEXIT >#34#return; 15211#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15209#fiboFINAL assume true; 15208#fiboEXIT >#32#return; 15044#L11-1 call #t~ret1 := fibo(~n - 2);< 15046#fiboENTRY ~n := #in~n; 15234#L6 assume !(~n < 1); 15053#L8 assume 1 == ~n;#res := 1; 14924#fiboFINAL assume true; 15043#fiboEXIT >#34#return; 15028#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15027#fiboFINAL assume true; 15012#fiboEXIT >#32#return; 14986#L11-1 call #t~ret1 := fibo(~n - 2);< 14988#fiboENTRY ~n := #in~n; 15056#L6 assume !(~n < 1); 15052#L8 assume !(1 == ~n); 15022#L11 call #t~ret0 := fibo(~n - 1);< 15228#fiboENTRY ~n := #in~n; 15206#L6 assume !(~n < 1); 15047#L8 assume 1 == ~n;#res := 1; 15036#fiboFINAL assume true; 15019#fiboEXIT >#32#return; 14996#L11-1 call #t~ret1 := fibo(~n - 2);< 15001#fiboENTRY ~n := #in~n; 15035#L6 assume ~n < 1;#res := 0; 15018#fiboFINAL assume true; 14993#fiboEXIT >#34#return; 14992#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 14990#fiboFINAL assume true; 14985#fiboEXIT >#34#return; 14980#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 14950#fiboFINAL assume true; 14942#fiboEXIT >#32#return; 14923#L11-1 call #t~ret1 := fibo(~n - 2);< 14934#fiboENTRY ~n := #in~n; 14928#L6 assume !(~n < 1); 14922#L8 assume !(1 == ~n); 14925#L11 call #t~ret0 := fibo(~n - 1);< 15197#fiboENTRY ~n := #in~n; 15196#L6 assume !(~n < 1); 15195#L8 assume !(1 == ~n); 15189#L11 call #t~ret0 := fibo(~n - 1);< 15191#fiboENTRY ~n := #in~n; 15148#L6 assume !(~n < 1); 15199#L8 assume 1 == ~n;#res := 1; 15194#fiboFINAL assume true; 15188#fiboEXIT >#32#return; 15181#L11-1 call #t~ret1 := fibo(~n - 2);< 15187#fiboENTRY ~n := #in~n; 15198#L6 assume ~n < 1;#res := 0; 15142#fiboFINAL assume true; 15179#fiboEXIT >#34#return; 15185#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15204#fiboFINAL assume true; 15203#fiboEXIT >#32#return; 15042#L11-1 call #t~ret1 := fibo(~n - 2);< 15045#fiboENTRY ~n := #in~n; 15232#L6 assume !(~n < 1); 15048#L8 assume 1 == ~n;#res := 1; 15038#fiboFINAL assume true; 15041#fiboEXIT >#34#return; 15028#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15027#fiboFINAL assume true; 15012#fiboEXIT >#34#return; 14944#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 15221#fiboFINAL assume true; 15013#fiboEXIT >#32#return; 14937#L11-1 call #t~ret1 := fibo(~n - 2);< 14954#fiboENTRY ~n := #in~n; 15146#L6 assume !(~n < 1); 14977#L8 assume !(1 == ~n); 14978#L11 call #t~ret0 := fibo(~n - 1);< 15024#fiboENTRY ~n := #in~n; 15229#L6 assume !(~n < 1); 15266#L8 assume !(1 == ~n); 14882#L11 call #t~ret0 := fibo(~n - 1);< 15241#fiboENTRY ~n := #in~n; 15257#L6 assume !(~n < 1); 15252#L8 assume !(1 == ~n); 14883#L11 [2018-12-02 22:17:56,181 INFO L796 eck$LassoCheckResult]: Loop: 14883#L11 call #t~ret0 := fibo(~n - 1);< 15241#fiboENTRY ~n := #in~n; 15257#L6 assume !(~n < 1); 15252#L8 assume !(1 == ~n); 14883#L11 [2018-12-02 22:17:56,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash 79280042, now seen corresponding path program 5 times [2018-12-02 22:17:56,181 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:56,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:56,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:56,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:56,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:56,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:56,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 6 times [2018-12-02 22:17:56,199 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:56,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:56,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:56,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:56,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 22:17:56,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:17:56,202 INFO L82 PathProgramCache]: Analyzing trace with hash 477112511, now seen corresponding path program 6 times [2018-12-02 22:17:56,202 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 22:17:56,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 22:17:56,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:56,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:17:56,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:17:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:17:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 332 proven. 245 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2018-12-02 22:17:56,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:17:56,339 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 22:17:56,348 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-02 22:17:56,363 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-12-02 22:17:56,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:17:56,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:17:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 349 proven. 258 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-12-02 22:17:56,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:17:56,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 24 [2018-12-02 22:17:56,437 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:17:56,437 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:17:56,438 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:17:56,438 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:17:56,438 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-02 22:17:56,438 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:56,438 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:17:56,438 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:17:56,438 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration9_Loop [2018-12-02 22:17:56,438 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:17:56,438 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:17:56,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:56,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:56,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:56,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:17:56,470 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:17:56,471 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:56,472 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-02 22:17:56,472 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7d58a159-145c-4d40-a9ca-e816fb8343b0/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:17:56,490 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-02 22:17:56,490 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-02 22:18:01,576 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-02 22:18:01,578 INFO L216 LassoAnalysis]: Preferences: [2018-12-02 22:18:01,578 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-02 22:18:01,578 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-02 22:18:01,578 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-02 22:18:01,578 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-02 22:18:01,578 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-02 22:18:01,578 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-02 22:18:01,578 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-02 22:18:01,578 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_false-unreach-call_true-termination.c_Iteration9_Loop [2018-12-02 22:18:01,578 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-02 22:18:01,579 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-02 22:18:01,579 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:18:01,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:18:01,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:18:01,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-02 22:18:01,609 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-02 22:18:01,609 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-02 22:18:01,609 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-02 22:18:01,609 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-02 22:18:01,609 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-02 22:18:01,609 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-02 22:18:01,610 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-02 22:18:01,610 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-02 22:18:01,610 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-02 22:18:01,610 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-02 22:18:01,611 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-02 22:18:01,612 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-02 22:18:01,612 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-02 22:18:01,612 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-02 22:18:01,612 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-02 22:18:01,612 INFO L518 LassoAnalysis]: Proved termination. [2018-12-02 22:18:01,612 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-12-02 22:18:01,612 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-02 22:18:01,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:18:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:18:01,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:18:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:18:01,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:18:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:18:01,730 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 [2018-12-02 22:18:01,730 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240 Second operand 6 states. [2018-12-02 22:18:01,757 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240. Second operand 6 states. Result 460 states and 697 transitions. Complement of second has 18 states. [2018-12-02 22:18:01,757 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 [2018-12-02 22:18:01,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:18:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-12-02 22:18:01,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 127 letters. Loop has 4 letters. [2018-12-02 22:18:01,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:18:01,758 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:18:01,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:18:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:18:01,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:18:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:18:01,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:18:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:18:01,896 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 [2018-12-02 22:18:01,896 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240 Second operand 6 states. [2018-12-02 22:18:01,945 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240. Second operand 6 states. Result 466 states and 703 transitions. Complement of second has 17 states. [2018-12-02 22:18:01,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-12-02 22:18:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:18:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-12-02 22:18:01,945 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 127 letters. Loop has 4 letters. [2018-12-02 22:18:01,945 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:18:01,945 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-02 22:18:01,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:18:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:18:02,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:18:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:18:02,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:18:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 22:18:02,058 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 [2018-12-02 22:18:02,058 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240 Second operand 6 states. [2018-12-02 22:18:02,096 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240. Second operand 6 states. Result 563 states and 838 transitions. Complement of second has 27 states. [2018-12-02 22:18:02,096 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 [2018-12-02 22:18:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-02 22:18:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-12-02 22:18:02,097 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 127 letters. Loop has 4 letters. [2018-12-02 22:18:02,097 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:18:02,097 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 131 letters. Loop has 4 letters. [2018-12-02 22:18:02,097 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:18:02,097 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 127 letters. Loop has 8 letters. [2018-12-02 22:18:02,098 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-02 22:18:02,098 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 563 states and 838 transitions. [2018-12-02 22:18:02,100 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-12-02 22:18:02,103 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 563 states to 446 states and 683 transitions. [2018-12-02 22:18:02,103 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 179 [2018-12-02 22:18:02,103 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 201 [2018-12-02 22:18:02,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 446 states and 683 transitions. [2018-12-02 22:18:02,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-02 22:18:02,104 INFO L705 BuchiCegarLoop]: Abstraction has 446 states and 683 transitions. [2018-12-02 22:18:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states and 683 transitions. [2018-12-02 22:18:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 442. [2018-12-02 22:18:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2018-12-02 22:18:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 678 transitions. [2018-12-02 22:18:02,110 INFO L728 BuchiCegarLoop]: Abstraction has 442 states and 678 transitions. [2018-12-02 22:18:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-02 22:18:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2018-12-02 22:18:02,111 INFO L87 Difference]: Start difference. First operand 442 states and 678 transitions. Second operand 25 states. [2018-12-02 22:18:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:18:02,413 INFO L93 Difference]: Finished difference Result 600 states and 864 transitions. [2018-12-02 22:18:02,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-02 22:18:02,414 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 600 states and 864 transitions. [2018-12-02 22:18:02,417 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-02 22:18:02,417 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 600 states to 0 states and 0 transitions. [2018-12-02 22:18:02,417 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-02 22:18:02,417 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-02 22:18:02,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-02 22:18:02,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-02 22:18:02,417 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 22:18:02,418 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 22:18:02,418 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 22:18:02,418 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-12-02 22:18:02,418 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-02 22:18:02,418 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-02 22:18:02,418 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-02 22:18:02,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 02.12 10:18:02 BoogieIcfgContainer [2018-12-02 22:18:02,424 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-02 22:18:02,424 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 22:18:02,424 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 22:18:02,424 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 22:18:02,425 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:17:42" (3/4) ... [2018-12-02 22:18:02,427 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 22:18:02,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 22:18:02,428 INFO L168 Benchmark]: Toolchain (without parser) took 19946.35 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 224.4 MB). Free memory was 953.3 MB in the beginning and 1.0 GB in the end (delta: -70.0 MB). Peak memory consumption was 154.4 MB. Max. memory is 11.5 GB. [2018-12-02 22:18:02,429 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:18:02,429 INFO L168 Benchmark]: CACSL2BoogieTranslator took 128.78 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-02 22:18:02,429 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.86 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:18:02,430 INFO L168 Benchmark]: Boogie Preprocessor took 9.55 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:18:02,430 INFO L168 Benchmark]: RCFGBuilder took 148.28 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -151.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2018-12-02 22:18:02,430 INFO L168 Benchmark]: BuchiAutomizer took 19634.91 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 116.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.5 MB). Peak memory consumption was 187.4 MB. Max. memory is 11.5 GB. [2018-12-02 22:18:02,431 INFO L168 Benchmark]: Witness Printer took 3.33 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:18:02,433 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 128.78 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.86 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.55 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 148.28 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -151.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 19634.91 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 116.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.5 MB). Peak memory consumption was 187.4 MB. Max. memory is 11.5 GB. * Witness Printer took 3.33 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 16 terminating modules (8 trivial, 2 deterministic, 6 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 25 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 19.6s and 10 iterations. TraceHistogramMax:23. Analysis of lassos took 15.3s. Construction of modules took 0.9s. Büchi inclusion checks took 3.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 496 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 442 states and ocurred in iteration 8. Nontrivial modules had stage [2, 0, 6, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 330 SDtfs, 948 SDslu, 470 SDs, 0 SdLazy, 1968 SolverSat, 776 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI1 SILT6 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf97 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 6ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 9 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 13.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...