./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_10-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 dd317ac0ecdb37853dacea373914a521115465e0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 03:43:48,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 03:43:48,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 03:43:48,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 03:43:48,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 03:43:48,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 03:43:48,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 03:43:48,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 03:43:48,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 03:43:48,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 03:43:48,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 03:43:48,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 03:43:48,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 03:43:48,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 03:43:48,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 03:43:48,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 03:43:48,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 03:43:48,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 03:43:48,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 03:43:48,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 03:43:48,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 03:43:48,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 03:43:48,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 03:43:48,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 03:43:48,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 03:43:48,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 03:43:48,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 03:43:48,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 03:43:48,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 03:43:48,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 03:43:48,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 03:43:48,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 03:43:48,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 03:43:48,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 03:43:48,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 03:43:48,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 03:43:48,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 03:43:48,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 03:43:48,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 03:43:48,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 03:43:48,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 03:43:48,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 03:43:48,795 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 03:43:48,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 03:43:48,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 03:43:48,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 03:43:48,799 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 03:43:48,799 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 03:43:48,799 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 03:43:48,800 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 03:43:48,800 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 03:43:48,800 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 03:43:48,801 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 03:43:48,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 03:43:48,802 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 03:43:48,802 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 03:43:48,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 03:43:48,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 03:43:48,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 03:43:48,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 03:43:48,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 03:43:48,805 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 03:43:48,806 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 03:43:48,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 03:43:48,807 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 03:43:48,808 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 03:43:48,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 03:43:48,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 03:43:48,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 03:43:48,810 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 03:43:48,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 03:43:48,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 03:43:48,811 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 03:43:48,814 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 03:43:48,815 INFO L138 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> dd317ac0ecdb37853dacea373914a521115465e0 [2019-11-28 03:43:49,160 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 03:43:49,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 03:43:49,178 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 03:43:49,179 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 03:43:49,179 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 03:43:49,180 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-2.c [2019-11-28 03:43:49,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0ac7574/aead149c74c9473aa5dfe02a9917bb78/FLAG365cdeae9 [2019-11-28 03:43:49,695 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 03:43:49,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2019-11-28 03:43:49,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0ac7574/aead149c74c9473aa5dfe02a9917bb78/FLAG365cdeae9 [2019-11-28 03:43:50,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0ac7574/aead149c74c9473aa5dfe02a9917bb78 [2019-11-28 03:43:50,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 03:43:50,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 03:43:50,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 03:43:50,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 03:43:50,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 03:43:50,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b275abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50, skipping insertion in model container [2019-11-28 03:43:50,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 03:43:50,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 03:43:50,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:43:50,301 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 03:43:50,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:43:50,337 INFO L208 MainTranslator]: Completed translation [2019-11-28 03:43:50,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50 WrapperNode [2019-11-28 03:43:50,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 03:43:50,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 03:43:50,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 03:43:50,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 03:43:50,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 03:43:50,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 03:43:50,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 03:43:50,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 03:43:50,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 03:43:50,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 03:43:50,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 03:43:50,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 03:43:50,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:50,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 03:43:50,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 03:43:50,507 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 03:43:50,507 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 03:43:50,669 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 03:43:50,669 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 03:43:50,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:50 BoogieIcfgContainer [2019-11-28 03:43:50,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 03:43:50,672 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 03:43:50,672 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 03:43:50,676 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 03:43:50,677 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:43:50,677 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:43:50" (1/3) ... [2019-11-28 03:43:50,679 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@44b0e711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:43:50, skipping insertion in model container [2019-11-28 03:43:50,679 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:43:50,679 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (2/3) ... [2019-11-28 03:43:50,680 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@44b0e711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:43:50, skipping insertion in model container [2019-11-28 03:43:50,680 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:43:50,680 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:50" (3/3) ... [2019-11-28 03:43:50,682 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_10-2.c [2019-11-28 03:43:50,746 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 03:43:50,749 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 03:43:50,749 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 03:43:50,749 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 03:43:50,750 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 03:43:50,750 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 03:43:50,750 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 03:43:50,750 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 03:43:50,779 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:43:50,822 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:50,822 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:50,822 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:50,838 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:43:50,839 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:43:50,839 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 03:43:50,839 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:43:50,842 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:50,842 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:50,843 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:50,843 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:43:50,843 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:43:50,852 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 03:43:50,853 INFO L796 eck$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 [2019-11-28 03:43:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 03:43:50,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:50,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632642718] [2019-11-28 03:43:50,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:50,956 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:50,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 03:43:50,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:50,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936242766] [2019-11-28 03:43:50,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:50,972 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:50,974 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 03:43:50,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:50,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860784740] [2019-11-28 03:43:50,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:50,991 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:51,135 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:51,136 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:51,136 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:51,137 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:51,137 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:43:51,137 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,138 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:51,138 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:51,138 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2019-11-28 03:43:51,138 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:51,139 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:51,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,245 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:51,246 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:51,255 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,256 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:51,265 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:51,265 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,281 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,281 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,285 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:51,285 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,301 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,301 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,306 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:51,306 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,313 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,319 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:51,320 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:51,335 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,336 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:51,350 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:43:51,351 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:51,366 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:43:51,369 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:51,370 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:51,370 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:51,370 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:51,370 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:43:51,371 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,371 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:51,371 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:51,371 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2019-11-28 03:43:51,371 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:51,371 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:51,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,533 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:51,541 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,559 INFO L120 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 Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,563 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,563 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,564 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,564 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:51,564 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,569 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:51,570 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:51,573 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:51,581 INFO L120 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 [2019-11-28 03:43:51,583 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,583 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,583 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,583 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:51,583 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,585 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:51,585 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:51,586 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:51,593 INFO L120 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 [2019-11-28 03:43:51,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,595 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:51,596 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:51,597 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:51,600 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,616 INFO L120 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 [2019-11-28 03:43:51,618 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,618 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,618 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,618 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:51,618 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,619 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:51,619 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:51,623 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,647 INFO L120 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 Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,653 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,653 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,654 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,654 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:51,654 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,656 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:51,657 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:51,660 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:43:51,665 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:43:51,665 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,685 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:43:51,686 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:43:51,686 INFO L510 LassoAnalysis]: Proved termination. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,687 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 03:43:51,693 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:43:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:51,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:43:51,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:51,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:43:51,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:51,865 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 [2019-11-28 03:43:51,867 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 03:43:52,013 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. [2019-11-28 03:43:52,014 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 [2019-11-28 03:43:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:43:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 03:43:52,020 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 03:43:52,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:52,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 03:43:52,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:52,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 03:43:52,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:52,025 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 03:43:52,031 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:52,044 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 03:43:52,046 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 03:43:52,046 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 03:43:52,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 03:43:52,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:52,054 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 03:43:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 03:43:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 03:43:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 03:43:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 03:43:52,104 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:43:52,104 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:43:52,104 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 03:43:52,105 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 03:43:52,108 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:52,108 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:52,112 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:52,115 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:52,115 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:52,116 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 03:43:52,116 INFO L796 eck$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 [2019-11-28 03:43:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 03:43:52,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:52,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411340039] [2019-11-28 03:43:52,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:52,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411340039] [2019-11-28 03:43:52,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012553616] [2019-11-28 03:43:52,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:43:52,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:52,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:52,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:43:52,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619544250] [2019-11-28 03:43:52,347 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 03:43:52,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:52,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862656436] [2019-11-28 03:43:52,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 03:43:52,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862656436] [2019-11-28 03:43:52,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 03:43:52,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 03:43:52,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428428168] [2019-11-28 03:43:52,435 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:43:52,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 03:43:52,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 03:43:52,444 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 03:43:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:52,563 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 03:43:52,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 03:43:52,565 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 03:43:52,568 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:52,572 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 03:43:52,573 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 03:43:52,579 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 03:43:52,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 03:43:52,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:52,580 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:43:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 03:43:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 03:43:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 03:43:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 03:43:52,593 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:43:52,593 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:43:52,593 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 03:43:52,593 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 03:43:52,595 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:52,596 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:52,596 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:52,597 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:52,597 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:52,598 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 03:43:52,598 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 03:43:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:52,599 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 03:43:52,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:52,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483209198] [2019-11-28 03:43:52,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:52,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483209198] [2019-11-28 03:43:52,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685110449] [2019-11-28 03:43:52,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 03:43:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:43:52,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:52,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:52,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:43:52,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346749579] [2019-11-28 03:43:52,753 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:52,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 03:43:52,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:52,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630075288] [2019-11-28 03:43:52,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:52,775 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:52,909 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:52,909 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:52,909 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:52,909 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:52,909 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:43:52,909 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:52,910 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:52,910 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:52,910 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2019-11-28 03:43:52,910 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:52,911 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:52,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:52,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:52,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:52,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:53,002 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:53,002 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:53,017 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:53,017 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:53,030 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:43:53,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:53,441 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:43:53,444 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:53,444 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:53,444 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:53,444 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:53,444 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:43:53,444 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:53,445 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:53,445 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:53,445 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2019-11-28 03:43:53,445 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:53,445 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:53,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:53,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:53,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:53,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:53,509 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:53,509 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:53,529 INFO L120 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 [2019-11-28 03:43:53,531 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:53,531 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:53,531 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:53,531 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:53,532 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:53,533 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:53,533 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:53,535 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:53,544 INFO L120 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 [2019-11-28 03:43:53,546 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:53,546 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:53,547 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:53,547 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:53,547 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:53,548 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:53,549 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:53,552 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:43:53,557 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:43:53,557 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:53,570 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:43:53,571 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:43:53,571 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:43:53,571 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:43:53,573 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:53,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:43:53,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:53,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 03:43:53,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:53,727 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 [2019-11-28 03:43:53,727 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-28 03:43:53,955 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. [2019-11-28 03:43:53,959 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 [2019-11-28 03:43:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 03:43:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 03:43:53,961 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 03:43:53,961 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:53,961 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 03:43:53,962 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:53,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 03:43:53,964 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:53,964 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 03:43:53,979 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:43:53,991 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 03:43:53,991 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 03:43:53,993 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:43:53,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 03:43:53,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:53,993 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 03:43:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 03:43:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 03:43:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:43:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 03:43:54,019 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 03:43:54,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:54,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 03:43:54,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 03:43:54,020 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-28 03:43:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:54,183 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 03:43:54,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 03:43:54,185 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 03:43:54,189 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:43:54,192 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 03:43:54,193 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 03:43:54,193 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:43:54,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 03:43:54,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:54,194 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 03:43:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 03:43:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 03:43:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:43:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 03:43:54,205 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:43:54,205 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:43:54,205 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 03:43:54,205 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-28 03:43:54,207 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:43:54,207 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:54,207 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:54,209 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:54,209 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 03:43:54,210 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 03:43:54,210 INFO L796 eck$LassoCheckResult]: Loop: 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume ~n < 1;#res := 0; 819#fiboFINAL assume true; 821#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 03:43:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 03:43:54,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:54,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77419774] [2019-11-28 03:43:54,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:43:54,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77419774] [2019-11-28 03:43:54,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480660579] [2019-11-28 03:43:54,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 03:43:54,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:43:54,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:54,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 03:43:54,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732917471] [2019-11-28 03:43:54,442 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:54,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 03:43:54,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:54,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809839088] [2019-11-28 03:43:54,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-28 03:43:54,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809839088] [2019-11-28 03:43:54,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806171152] [2019-11-28 03:43:54,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:43:54,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-28 03:43:54,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:54,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 03:43:54,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851661648] [2019-11-28 03:43:54,676 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:43:54,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:54,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 03:43:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 03:43:54,678 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 03:43:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:54,925 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-28 03:43:54,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 03:43:54,926 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-28 03:43:54,930 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:43:54,933 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-28 03:43:54,933 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 03:43:54,933 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 03:43:54,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-28 03:43:54,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:54,934 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:43:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-28 03:43:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 03:43:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 03:43:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-28 03:43:54,945 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:43:54,945 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:43:54,945 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 03:43:54,945 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-28 03:43:54,947 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:43:54,947 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:54,947 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:54,949 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:54,949 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 03:43:54,949 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 03:43:54,949 INFO L796 eck$LassoCheckResult]: Loop: 1260#L11-1 call #t~ret1 := fibo(~n - 2);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume 1 == ~n;#res := 1; 1254#fiboFINAL assume true; 1346#fiboEXIT >#32#return; 1252#L11-1 call #t~ret1 := fibo(~n - 2);< 1271#fiboENTRY ~n := #in~n; 1272#L6 assume ~n < 1;#res := 0; 1310#fiboFINAL assume true; 1347#fiboEXIT >#34#return; 1244#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 03:43:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:54,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 03:43:54,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:54,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490767786] [2019-11-28 03:43:54,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:43:55,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490767786] [2019-11-28 03:43:55,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131008995] [2019-11-28 03:43:55,075 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:55,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 03:43:55,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:43:55,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:43:55,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:43:55,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:55,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-28 03:43:55,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803365984] [2019-11-28 03:43:55,139 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 03:43:55,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:55,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597879295] [2019-11-28 03:43:55,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:55,151 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:55,373 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:55,373 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:55,374 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:55,374 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:55,374 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:43:55,374 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:55,374 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:55,374 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:55,374 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2019-11-28 03:43:55,374 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:55,374 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:55,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:55,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:55,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:55,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:55,457 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:55,457 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:55,479 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:55,479 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:55,483 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:55,483 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:55,492 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:55,493 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:55,496 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:55,496 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:55,504 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:55,505 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:55,509 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:55,509 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=1} Honda state: {fibo_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:55,518 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:55,518 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:55,530 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:43:55,530 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:56,067 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:43:56,070 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:56,070 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:56,070 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:56,070 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:56,070 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:43:56,070 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:56,070 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:56,070 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:56,070 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2019-11-28 03:43:56,070 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:56,071 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:56,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:56,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:56,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:56,091 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:56,173 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:56,174 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:56,183 INFO L120 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 [2019-11-28 03:43:56,184 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:56,184 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:56,184 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:56,184 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:56,184 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:56,185 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:56,185 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:56,188 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 03:43:56,193 INFO L120 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 [2019-11-28 03:43:56,195 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:56,195 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:56,195 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:56,195 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:56,196 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:56,196 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:56,196 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:56,197 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:56,204 INFO L120 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 [2019-11-28 03:43:56,206 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:56,206 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:56,206 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:56,206 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:56,206 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:56,208 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:56,208 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:56,216 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:43:56,220 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 03:43:56,221 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:56,230 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:43:56,230 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:43:56,230 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:43:56,230 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:43:56,233 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:56,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:56,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:43:56,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:56,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:56,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:56,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:43:56,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 03:43:56,443 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 03:43:56,443 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:43:56,705 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 182 states and 247 transitions. Complement of second has 33 states. [2019-11-28 03:43:56,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:43:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 03:43:56,706 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:43:56,707 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:56,707 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:43:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:56,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:43:56,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:56,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:56,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:56,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:43:56,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 03:43:56,889 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 03:43:56,889 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:43:57,139 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 307 states and 416 transitions. Complement of second has 25 states. [2019-11-28 03:43:57,142 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 [2019-11-28 03:43:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:43:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 03:43:57,144 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:43:57,145 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:57,145 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:43:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:57,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:43:57,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:57,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:57,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:57,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:43:57,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 03:43:57,346 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 6 loop predicates [2019-11-28 03:43:57,346 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:43:57,660 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 1077 states and 1512 transitions. Complement of second has 130 states. [2019-11-28 03:43:57,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:43:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 03:43:57,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:43:57,668 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:57,669 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 03:43:57,670 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:57,670 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 03:43:57,676 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:57,676 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-11-28 03:43:57,704 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 03:43:57,733 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-11-28 03:43:57,734 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 03:43:57,736 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 03:43:57,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-11-28 03:43:57,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:57,742 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-11-28 03:43:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-11-28 03:43:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-11-28 03:43:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-28 03:43:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-11-28 03:43:57,813 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-11-28 03:43:57,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:57,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 03:43:57,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 03:43:57,819 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-11-28 03:43:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:58,101 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-11-28 03:43:58,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 03:43:58,102 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-11-28 03:43:58,112 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:58,123 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-11-28 03:43:58,123 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-11-28 03:43:58,123 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-11-28 03:43:58,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-11-28 03:43:58,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:58,124 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-11-28 03:43:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-11-28 03:43:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-11-28 03:43:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-28 03:43:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-28 03:43:58,147 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 03:43:58,148 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 03:43:58,148 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 03:43:58,148 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-11-28 03:43:58,153 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:58,153 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:58,153 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:58,156 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:58,157 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:43:58,157 INFO L794 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4845#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4953#fiboEXIT >#32#return; 4933#L11-1 call #t~ret1 := fibo(~n - 2);< 4941#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4957#L8 assume !(1 == ~n); 4958#L11 call #t~ret0 := fibo(~n - 1);< 4967#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 03:43:58,157 INFO L796 eck$LassoCheckResult]: Loop: 5054#fiboENTRY ~n := #in~n; 5065#L6 assume !(~n < 1); 5062#L8 assume !(1 == ~n); 5051#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 03:43:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:58,158 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-11-28 03:43:58,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:58,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993888384] [2019-11-28 03:43:58,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:58,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993888384] [2019-11-28 03:43:58,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915504942] [2019-11-28 03:43:58,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:43:58,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 03:43:58,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:58,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-11-28 03:43:58,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566647588] [2019-11-28 03:43:58,457 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 03:43:58,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:58,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566917635] [2019-11-28 03:43:58,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:58,464 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:58,496 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:58,496 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:58,497 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:58,497 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:58,497 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:43:58,497 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,497 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:58,497 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:58,497 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2019-11-28 03:43:58,497 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:58,497 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:58,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,546 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:58,547 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:58,557 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:58,557 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,565 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:58,565 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:58,571 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:58,574 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:58,574 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,579 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:58,580 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:58,582 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:58,582 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,588 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:58,588 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,596 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:43:58,597 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:58,640 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:43:58,642 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:58,642 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:58,642 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:58,642 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:58,642 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:43:58,642 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,642 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:58,642 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:58,643 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2019-11-28 03:43:58,643 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:58,643 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:58,644 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,694 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:58,694 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,703 INFO L120 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 [2019-11-28 03:43:58,704 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:58,704 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:58,704 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:58,704 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:58,704 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:58,705 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:58,705 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:58,706 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,712 INFO L120 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 [2019-11-28 03:43:58,713 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:58,714 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:58,714 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:58,714 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:58,714 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:58,715 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:58,715 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:58,716 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,721 INFO L120 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 [2019-11-28 03:43:58,723 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:58,723 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:58,723 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:58,723 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:58,723 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:58,723 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:58,723 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:58,725 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,732 INFO L120 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 [2019-11-28 03:43:58,733 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:58,733 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:58,733 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:58,733 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:58,734 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:58,735 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:58,735 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:58,739 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:43:58,749 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:43:58,749 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:58,755 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:43:58,756 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:43:58,756 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:43:58,756 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 03:43:58,758 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:43:58,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:43:58,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:58,879 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 [2019-11-28 03:43:58,879 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:43:58,964 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 03:43:58,965 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 [2019-11-28 03:43:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:43:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:43:58,965 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:43:58,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:58,966 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:43:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:59,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:43:59,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:59,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:43:59,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:59,089 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 [2019-11-28 03:43:59,090 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:43:59,173 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 03:43:59,173 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 [2019-11-28 03:43:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:43:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:43:59,174 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:43:59,174 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:59,174 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:43:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:59,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:43:59,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:59,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:43:59,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:59,293 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 [2019-11-28 03:43:59,293 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:43:59,381 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 650 states and 920 transitions. Complement of second has 14 states. [2019-11-28 03:43:59,382 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 [2019-11-28 03:43:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:43:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 03:43:59,384 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:43:59,384 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:59,384 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-28 03:43:59,385 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:59,385 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-11-28 03:43:59,386 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:59,387 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-11-28 03:43:59,396 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:59,405 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-11-28 03:43:59,406 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-11-28 03:43:59,407 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-11-28 03:43:59,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-11-28 03:43:59,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:59,409 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-11-28 03:43:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-11-28 03:43:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-11-28 03:43:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-11-28 03:43:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-11-28 03:43:59,438 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-11-28 03:43:59,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:59,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 03:43:59,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-11-28 03:43:59,440 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-11-28 03:43:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:59,832 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-11-28 03:43:59,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 03:43:59,833 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-11-28 03:43:59,843 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:59,852 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-11-28 03:43:59,853 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-11-28 03:43:59,853 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-11-28 03:43:59,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-11-28 03:43:59,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:59,854 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-11-28 03:43:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-11-28 03:43:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-11-28 03:43:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-28 03:43:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-11-28 03:43:59,881 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 03:43:59,882 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 03:43:59,882 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 03:43:59,882 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-11-28 03:43:59,887 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:59,887 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:59,887 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:59,891 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:59,891 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:43:59,892 INFO L794 eck$LassoCheckResult]: Stem: 8597#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 8598#L25 call main_#t~ret2 := fibo(main_~x~0);< 8631#fiboENTRY ~n := #in~n; 8671#L6 assume !(~n < 1); 8669#L8 assume !(1 == ~n); 8666#L11 call #t~ret0 := fibo(~n - 1);< 8667#fiboENTRY ~n := #in~n; 8677#L6 assume !(~n < 1); 8676#L8 assume !(1 == ~n); 8653#L11 call #t~ret0 := fibo(~n - 1);< 8675#fiboENTRY ~n := #in~n; 8679#L6 assume !(~n < 1); 8660#L8 assume !(1 == ~n); 8655#L11 call #t~ret0 := fibo(~n - 1);< 8657#fiboENTRY ~n := #in~n; 8711#L6 assume !(~n < 1); 8708#L8 assume !(1 == ~n); 8649#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8721#L6 assume !(~n < 1); 8710#L8 assume !(1 == ~n); 8648#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8730#L6 assume !(~n < 1); 8796#L8 assume 1 == ~n;#res := 1; 8794#fiboFINAL assume true; 8793#fiboEXIT >#32#return; 8785#L11-1 call #t~ret1 := fibo(~n - 2);< 8792#fiboENTRY ~n := #in~n; 9030#L6 assume !(~n < 1); 9006#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8639#fiboENTRY ~n := #in~n; 8640#L6 assume !(~n < 1); 9118#L8 assume !(1 == ~n); 8633#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 03:43:59,893 INFO L796 eck$LassoCheckResult]: Loop: 8634#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 03:43:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:59,893 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-11-28 03:43:59,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:59,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112719718] [2019-11-28 03:43:59,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:00,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112719718] [2019-11-28 03:44:00,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507853131] [2019-11-28 03:44:00,221 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:00,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 03:44:00,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:00,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:00,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 03:44:00,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:00,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 24 [2019-11-28 03:44:00,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112099852] [2019-11-28 03:44:00,294 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:00,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-11-28 03:44:00,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:00,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554647515] [2019-11-28 03:44:00,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:00,301 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:00,344 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:00,345 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:00,345 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:00,345 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:00,345 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:00,345 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,345 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:00,346 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:00,346 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2019-11-28 03:44:00,346 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:00,346 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:00,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:00,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:00,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:00,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:00,415 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:00,416 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,421 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:00,421 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:00,425 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:00,425 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,434 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:00,434 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:00,436 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:00,436 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:00,443 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:00,445 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:00,445 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,453 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:00,453 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,466 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:00,466 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:06,118 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:06,121 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:06,121 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:06,121 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:06,121 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:06,121 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:06,121 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:06,121 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:06,121 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:06,122 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2019-11-28 03:44:06,122 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:06,122 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:06,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:06,124 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:06,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:06,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:06,193 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:06,194 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:06,224 INFO L120 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 [2019-11-28 03:44:06,227 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:06,227 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:06,227 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:06,227 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:06,228 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:06,228 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:06,228 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:06,229 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:06,235 INFO L120 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 [2019-11-28 03:44:06,237 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:06,237 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:06,237 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:06,237 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:06,237 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:06,237 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:06,238 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:06,239 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:06,245 INFO L120 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 [2019-11-28 03:44:06,248 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:06,248 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:06,248 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:06,248 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:06,248 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:06,249 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:06,249 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:06,250 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:06,258 INFO L120 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 [2019-11-28 03:44:06,259 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:06,259 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:06,259 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:06,260 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:06,260 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:06,260 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:06,260 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:06,262 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:06,268 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:06,268 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:06,273 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:06,274 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:06,274 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:06,274 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:06,278 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:06,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:06,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:06,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:06,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:06,392 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 [2019-11-28 03:44:06,392 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 03:44:06,450 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 556 states and 823 transitions. Complement of second has 18 states. [2019-11-28 03:44:06,451 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 [2019-11-28 03:44:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:06,452 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 03:44:06,452 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:06,452 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:06,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:06,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:06,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:06,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:06,588 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 [2019-11-28 03:44:06,588 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 03:44:06,693 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 786 states and 1145 transitions. Complement of second has 22 states. [2019-11-28 03:44:06,694 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 [2019-11-28 03:44:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:06,694 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 03:44:06,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:06,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-28 03:44:06,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:06,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-28 03:44:06,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:06,696 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-11-28 03:44:06,705 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:06,716 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-11-28 03:44:06,716 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-11-28 03:44:06,716 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-11-28 03:44:06,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-11-28 03:44:06,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:06,717 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-11-28 03:44:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-11-28 03:44:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-11-28 03:44:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-28 03:44:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-11-28 03:44:06,739 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-11-28 03:44:06,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:06,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 03:44:06,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2019-11-28 03:44:06,740 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 24 states. [2019-11-28 03:44:07,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:07,163 INFO L93 Difference]: Finished difference Result 794 states and 1182 transitions. [2019-11-28 03:44:07,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 03:44:07,163 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 794 states and 1182 transitions. [2019-11-28 03:44:07,183 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:07,208 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 794 states to 779 states and 1160 transitions. [2019-11-28 03:44:07,209 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 283 [2019-11-28 03:44:07,209 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 283 [2019-11-28 03:44:07,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 779 states and 1160 transitions. [2019-11-28 03:44:07,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:07,210 INFO L688 BuchiCegarLoop]: Abstraction has 779 states and 1160 transitions. [2019-11-28 03:44:07,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states and 1160 transitions. [2019-11-28 03:44:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 761. [2019-11-28 03:44:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-11-28 03:44:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1128 transitions. [2019-11-28 03:44:07,240 INFO L711 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 03:44:07,240 INFO L591 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 03:44:07,240 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 03:44:07,241 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 761 states and 1128 transitions. [2019-11-28 03:44:07,247 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:07,247 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:07,247 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:07,254 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:07,254 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:07,256 INFO L794 eck$LassoCheckResult]: Stem: 12464#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 12465#L25 call main_#t~ret2 := fibo(main_~x~0);< 12492#fiboENTRY ~n := #in~n; 12553#L6 assume !(~n < 1); 12554#L8 assume !(1 == ~n); 12548#L11 call #t~ret0 := fibo(~n - 1);< 12549#fiboENTRY ~n := #in~n; 12574#L6 assume !(~n < 1); 12551#L8 assume !(1 == ~n); 12547#L11 call #t~ret0 := fibo(~n - 1);< 12573#fiboENTRY ~n := #in~n; 12571#L6 assume !(~n < 1); 12569#L8 assume !(1 == ~n); 12556#L11 call #t~ret0 := fibo(~n - 1);< 12566#fiboENTRY ~n := #in~n; 12572#L6 assume !(~n < 1); 12570#L8 assume !(1 == ~n); 12561#L11 call #t~ret0 := fibo(~n - 1);< 12568#fiboENTRY ~n := #in~n; 12600#L6 assume !(~n < 1); 12599#L8 assume !(1 == ~n); 12584#L11 call #t~ret0 := fibo(~n - 1);< 12591#fiboENTRY ~n := #in~n; 12630#L6 assume !(~n < 1); 12621#L8 assume !(1 == ~n); 12586#L11 call #t~ret0 := fibo(~n - 1);< 12595#fiboENTRY ~n := #in~n; 12702#L6 assume !(~n < 1); 12693#L8 assume 1 == ~n;#res := 1; 12692#fiboFINAL assume true; 12685#fiboEXIT >#32#return; 12626#L11-1 call #t~ret1 := fibo(~n - 2);< 12628#fiboENTRY ~n := #in~n; 12664#L6 assume ~n < 1;#res := 0; 12659#fiboFINAL assume true; 12625#fiboEXIT >#34#return; 12620#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 12594#fiboFINAL assume true; 12590#fiboEXIT >#32#return; 12585#L11-1 call #t~ret1 := fibo(~n - 2);< 12588#fiboENTRY ~n := #in~n; 12798#L6 assume !(~n < 1); 12796#L8 assume !(1 == ~n); 12792#L11 call #t~ret0 := fibo(~n - 1);< 12793#fiboENTRY ~n := #in~n; 12861#L6 assume !(~n < 1); 12860#L8 assume !(1 == ~n); 12854#L11 call #t~ret0 := fibo(~n - 1);< 12858#fiboENTRY ~n := #in~n; 12892#L6 assume !(~n < 1); 12890#L8 assume !(1 == ~n); 12852#L11 [2019-11-28 03:44:07,256 INFO L796 eck$LassoCheckResult]: Loop: 12852#L11 call #t~ret0 := fibo(~n - 1);< 12858#fiboENTRY ~n := #in~n; 12892#L6 assume !(~n < 1); 12890#L8 assume !(1 == ~n); 12852#L11 [2019-11-28 03:44:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-11-28 03:44:07,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:07,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260100298] [2019-11-28 03:44:07,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:44:07,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260100298] [2019-11-28 03:44:07,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863070696] [2019-11-28 03:44:07,589 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:07,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 03:44:07,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:07,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:44:07,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-28 03:44:07,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:07,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 30 [2019-11-28 03:44:07,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567035297] [2019-11-28 03:44:07,705 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:07,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-11-28 03:44:07,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:07,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091900834] [2019-11-28 03:44:07,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:07,709 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:07,751 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:07,751 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:07,751 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:07,751 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:07,751 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:07,751 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:07,752 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:07,752 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:07,752 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2019-11-28 03:44:07,752 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:07,752 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:07,753 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:07,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:07,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:07,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:07,821 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:07,822 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:07,827 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:07,827 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:07,838 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:07,838 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:10,582 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:10,584 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:10,584 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:10,584 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:10,584 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:10,584 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:10,584 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,584 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:10,585 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:10,585 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2019-11-28 03:44:10,585 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:10,585 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:10,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:10,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:10,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:10,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:10,653 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:10,653 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:10,660 INFO L120 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 [2019-11-28 03:44:10,662 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:10,662 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:10,662 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:10,662 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:10,662 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:10,663 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:10,663 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,664 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,669 INFO L120 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 [2019-11-28 03:44:10,670 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:10,670 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:10,671 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:10,671 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:10,671 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:10,671 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:10,671 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:10,672 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,678 INFO L120 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 [2019-11-28 03:44:10,679 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:10,679 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:10,679 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:10,680 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:10,680 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:10,680 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:10,680 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:10,681 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 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 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,687 INFO L120 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 [2019-11-28 03:44:10,689 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:10,689 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:10,689 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:10,689 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:10,689 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:10,690 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:10,690 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:10,693 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:10,696 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:10,696 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 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 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,700 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:10,700 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:10,701 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:10,701 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:10,702 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:10,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:10,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:10,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:10,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:10,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:10,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:10,826 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 [2019-11-28 03:44:10,826 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 03:44:10,901 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380. Second operand 6 states. Result 783 states and 1151 transitions. Complement of second has 18 states. [2019-11-28 03:44:10,902 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 [2019-11-28 03:44:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:10,903 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:10,903 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:10,903 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:10,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:10,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:10,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:10,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:11,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:11,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:11,029 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 [2019-11-28 03:44:11,030 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 03:44:11,124 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380. Second operand 6 states. Result 964 states and 1362 transitions. Complement of second has 22 states. [2019-11-28 03:44:11,126 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 [2019-11-28 03:44:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:11,127 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:11,127 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:11,127 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:11,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:11,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:11,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:11,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:11,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:11,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:11,288 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 [2019-11-28 03:44:11,288 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 03:44:11,388 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380. Second operand 6 states. Result 1029 states and 1473 transitions. Complement of second has 27 states. [2019-11-28 03:44:11,389 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 [2019-11-28 03:44:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 03:44:11,390 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:11,391 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:11,391 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-28 03:44:11,392 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:11,392 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-11-28 03:44:11,393 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:11,393 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1029 states and 1473 transitions. [2019-11-28 03:44:11,407 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:11,423 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1029 states to 761 states and 1128 transitions. [2019-11-28 03:44:11,423 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 228 [2019-11-28 03:44:11,424 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 264 [2019-11-28 03:44:11,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 761 states and 1128 transitions. [2019-11-28 03:44:11,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:11,424 INFO L688 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 03:44:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states and 1128 transitions. [2019-11-28 03:44:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2019-11-28 03:44:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-11-28 03:44:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1128 transitions. [2019-11-28 03:44:11,449 INFO L711 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 03:44:11,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-28 03:44:11,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2019-11-28 03:44:11,450 INFO L87 Difference]: Start difference. First operand 761 states and 1128 transitions. Second operand 30 states. [2019-11-28 03:44:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:12,047 INFO L93 Difference]: Finished difference Result 395 states and 515 transitions. [2019-11-28 03:44:12,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 03:44:12,048 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 395 states and 515 transitions. [2019-11-28 03:44:12,053 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:12,061 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 395 states to 361 states and 479 transitions. [2019-11-28 03:44:12,061 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2019-11-28 03:44:12,062 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 167 [2019-11-28 03:44:12,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 361 states and 479 transitions. [2019-11-28 03:44:12,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:12,062 INFO L688 BuchiCegarLoop]: Abstraction has 361 states and 479 transitions. [2019-11-28 03:44:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states and 479 transitions. [2019-11-28 03:44:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 317. [2019-11-28 03:44:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-28 03:44:12,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2019-11-28 03:44:12,073 INFO L711 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 03:44:12,073 INFO L591 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 03:44:12,073 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-28 03:44:12,073 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 317 states and 424 transitions. [2019-11-28 03:44:12,076 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:12,076 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:12,077 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:12,079 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 03:44:12,079 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:12,080 INFO L794 eck$LassoCheckResult]: Stem: 17993#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 17994#L25 call main_#t~ret2 := fibo(main_~x~0);< 18032#fiboENTRY ~n := #in~n; 18115#L6 assume !(~n < 1); 18112#L8 assume !(1 == ~n); 18101#L11 call #t~ret0 := fibo(~n - 1);< 18106#fiboENTRY ~n := #in~n; 18110#L6 assume !(~n < 1); 18108#L8 assume !(1 == ~n); 18103#L11 call #t~ret0 := fibo(~n - 1);< 18104#fiboENTRY ~n := #in~n; 18128#L6 assume !(~n < 1); 18119#L8 assume !(1 == ~n); 18114#L11 call #t~ret0 := fibo(~n - 1);< 18117#fiboENTRY ~n := #in~n; 18138#L6 assume !(~n < 1); 18136#L8 assume !(1 == ~n); 18002#L11 call #t~ret0 := fibo(~n - 1);< 18017#fiboENTRY ~n := #in~n; 18018#L6 assume !(~n < 1); 18001#L8 assume !(1 == ~n); 18003#L11 call #t~ret0 := fibo(~n - 1);< 18131#fiboENTRY ~n := #in~n; 18183#L6 assume !(~n < 1); 18173#L8 assume !(1 == ~n); 18020#L11 call #t~ret0 := fibo(~n - 1);< 18131#fiboENTRY ~n := #in~n; 18183#L6 assume !(~n < 1); 18173#L8 assume !(1 == ~n); 18020#L11 call #t~ret0 := fibo(~n - 1);< 18131#fiboENTRY ~n := #in~n; 18183#L6 assume !(~n < 1); 18173#L8 assume !(1 == ~n); 18020#L11 call #t~ret0 := fibo(~n - 1);< 18168#fiboENTRY ~n := #in~n; 18290#L6 assume !(~n < 1); 18288#L8 assume 1 == ~n;#res := 1; 18287#fiboFINAL assume true; 18286#fiboEXIT >#32#return; 18019#L11-1 call #t~ret1 := fibo(~n - 2);< 18021#fiboENTRY ~n := #in~n; 18222#L6 assume ~n < 1;#res := 0; 18217#fiboFINAL assume true; 18210#fiboEXIT >#34#return; 18197#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 18194#fiboFINAL assume true; 18189#fiboEXIT >#32#return; 18178#L11-1 call #t~ret1 := fibo(~n - 2);< 18181#fiboENTRY ~n := #in~n; 18208#L6 assume !(~n < 1); 18188#L8 assume 1 == ~n;#res := 1; 18185#fiboFINAL assume true; 18177#fiboEXIT >#34#return; 18172#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 18167#fiboFINAL assume true; 18164#fiboEXIT >#32#return; 18123#L11-1 call #t~ret1 := fibo(~n - 2);< 18126#fiboENTRY ~n := #in~n; 18192#L6 assume !(~n < 1); 18187#L8 assume !(1 == ~n); 17986#L11 call #t~ret0 := fibo(~n - 1);< 18086#fiboENTRY ~n := #in~n; 18087#L6 assume !(~n < 1); 18082#L8 assume !(1 == ~n); 18051#L11 call #t~ret0 := fibo(~n - 1);< 18052#fiboENTRY ~n := #in~n; 18071#L6 assume !(~n < 1); 18070#L8 assume !(1 == ~n); 18049#L11 [2019-11-28 03:44:12,081 INFO L796 eck$LassoCheckResult]: Loop: 18049#L11 call #t~ret0 := fibo(~n - 1);< 18052#fiboENTRY ~n := #in~n; 18071#L6 assume !(~n < 1); 18070#L8 assume !(1 == ~n); 18049#L11 [2019-11-28 03:44:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:12,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1455011085, now seen corresponding path program 4 times [2019-11-28 03:44:12,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:12,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737991838] [2019-11-28 03:44:12,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 37 proven. 271 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-28 03:44:12,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737991838] [2019-11-28 03:44:12,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267345450] [2019-11-28 03:44:12,533 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:12,597 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 03:44:12,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:12,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:12,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-28 03:44:12,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:12,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 28 [2019-11-28 03:44:12,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976828026] [2019-11-28 03:44:12,652 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:12,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 5 times [2019-11-28 03:44:12,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:12,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97829892] [2019-11-28 03:44:12,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:12,658 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:12,722 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:12,722 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:12,722 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:12,723 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:12,723 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:12,723 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:12,723 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:12,723 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:12,723 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2019-11-28 03:44:12,724 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:12,724 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:12,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:12,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:12,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:12,741 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:12,788 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:12,788 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:12,795 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:12,795 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:12,799 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:12,800 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:12,807 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:12,807 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:12,811 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:12,811 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:12,820 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:12,821 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:12,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:12,835 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,617 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:15,619 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:15,619 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:15,619 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:15,619 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:15,619 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:15,619 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,619 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:15,620 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:15,620 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2019-11-28 03:44:15,620 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:15,620 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:15,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:15,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:15,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:15,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:15,671 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:15,671 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 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 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,675 INFO L120 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 [2019-11-28 03:44:15,676 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:15,677 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:15,677 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:15,677 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:15,677 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:15,678 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:15,678 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:15,679 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 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 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,685 INFO L120 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 [2019-11-28 03:44:15,686 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:15,686 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:15,686 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:15,687 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:15,687 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:15,687 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:15,687 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:15,688 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 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 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,694 INFO L120 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 [2019-11-28 03:44:15,696 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:15,696 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:15,696 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:15,696 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:15,697 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:15,698 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:15,698 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:15,700 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:15,702 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 03:44:15,702 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 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 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,707 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:15,707 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:15,707 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:15,707 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:15,709 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:15,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 03:44:15,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:15,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:15,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:15,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:15,865 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 [2019-11-28 03:44:15,865 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 03:44:15,927 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 336 states and 444 transitions. Complement of second has 18 states. [2019-11-28 03:44:15,927 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 [2019-11-28 03:44:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:15,928 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 03:44:15,928 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:15,928 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:15,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:16,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 03:44:16,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:16,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:16,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:16,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:16,067 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 [2019-11-28 03:44:16,067 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 03:44:16,156 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 342 states and 450 transitions. Complement of second has 17 states. [2019-11-28 03:44:16,156 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 [2019-11-28 03:44:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:16,157 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 03:44:16,157 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:16,157 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:16,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 03:44:16,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:16,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:16,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:16,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:16,316 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 [2019-11-28 03:44:16,316 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 03:44:16,378 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 423 states and 554 transitions. Complement of second has 27 states. [2019-11-28 03:44:16,379 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 [2019-11-28 03:44:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 03:44:16,380 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 03:44:16,380 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:16,380 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 03:44:16,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:16,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 8 letters. [2019-11-28 03:44:16,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:16,382 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 423 states and 554 transitions. [2019-11-28 03:44:16,386 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:16,389 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 423 states to 325 states and 434 transitions. [2019-11-28 03:44:16,390 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 122 [2019-11-28 03:44:16,390 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2019-11-28 03:44:16,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 325 states and 434 transitions. [2019-11-28 03:44:16,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:16,390 INFO L688 BuchiCegarLoop]: Abstraction has 325 states and 434 transitions. [2019-11-28 03:44:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states and 434 transitions. [2019-11-28 03:44:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2019-11-28 03:44:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-28 03:44:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2019-11-28 03:44:16,399 INFO L711 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 03:44:16,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-28 03:44:16,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2019-11-28 03:44:16,400 INFO L87 Difference]: Start difference. First operand 317 states and 424 transitions. Second operand 28 states. [2019-11-28 03:44:17,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:17,120 INFO L93 Difference]: Finished difference Result 412 states and 550 transitions. [2019-11-28 03:44:17,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-28 03:44:17,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 412 states and 550 transitions. [2019-11-28 03:44:17,126 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:17,130 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 412 states to 404 states and 536 transitions. [2019-11-28 03:44:17,131 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2019-11-28 03:44:17,131 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 173 [2019-11-28 03:44:17,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 404 states and 536 transitions. [2019-11-28 03:44:17,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:17,131 INFO L688 BuchiCegarLoop]: Abstraction has 404 states and 536 transitions. [2019-11-28 03:44:17,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states and 536 transitions. [2019-11-28 03:44:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 359. [2019-11-28 03:44:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-11-28 03:44:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 480 transitions. [2019-11-28 03:44:17,140 INFO L711 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 03:44:17,140 INFO L591 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 03:44:17,141 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-11-28 03:44:17,141 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 359 states and 480 transitions. [2019-11-28 03:44:17,143 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:17,143 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:17,144 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:17,145 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 03:44:17,145 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:17,145 INFO L794 eck$LassoCheckResult]: Stem: 21203#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 21204#L25 call main_#t~ret2 := fibo(main_~x~0);< 21236#fiboENTRY ~n := #in~n; 21340#L6 assume !(~n < 1); 21338#L8 assume !(1 == ~n); 21331#L11 call #t~ret0 := fibo(~n - 1);< 21335#fiboENTRY ~n := #in~n; 21339#L6 assume !(~n < 1); 21336#L8 assume !(1 == ~n); 21315#L11 call #t~ret0 := fibo(~n - 1);< 21333#fiboENTRY ~n := #in~n; 21517#L6 assume !(~n < 1); 21515#L8 assume !(1 == ~n); 21318#L11 call #t~ret0 := fibo(~n - 1);< 21320#fiboENTRY ~n := #in~n; 21358#L6 assume !(~n < 1); 21355#L8 assume !(1 == ~n); 21345#L11 call #t~ret0 := fibo(~n - 1);< 21351#fiboENTRY ~n := #in~n; 21410#L6 assume !(~n < 1); 21399#L8 assume !(1 == ~n); 21392#L11 call #t~ret0 := fibo(~n - 1);< 21395#fiboENTRY ~n := #in~n; 21423#L6 assume !(~n < 1); 21416#L8 assume !(1 == ~n); 21226#L11 call #t~ret0 := fibo(~n - 1);< 21413#fiboENTRY ~n := #in~n; 21433#L6 assume !(~n < 1); 21432#L8 assume !(1 == ~n); 21225#L11 call #t~ret0 := fibo(~n - 1);< 21413#fiboENTRY ~n := #in~n; 21433#L6 assume !(~n < 1); 21432#L8 assume !(1 == ~n); 21225#L11 call #t~ret0 := fibo(~n - 1);< 21413#fiboENTRY ~n := #in~n; 21433#L6 assume !(~n < 1); 21432#L8 assume !(1 == ~n); 21225#L11 call #t~ret0 := fibo(~n - 1);< 21418#fiboENTRY ~n := #in~n; 21551#L6 assume !(~n < 1); 21550#L8 assume 1 == ~n;#res := 1; 21549#fiboFINAL assume true; 21548#fiboEXIT >#32#return; 21224#L11-1 call #t~ret1 := fibo(~n - 2);< 21227#fiboENTRY ~n := #in~n; 21237#L6 assume ~n < 1;#res := 0; 21238#fiboFINAL assume true; 21545#fiboEXIT >#34#return; 21543#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 21542#fiboFINAL assume true; 21541#fiboEXIT >#32#return; 21526#L11-1 call #t~ret1 := fibo(~n - 2);< 21529#fiboENTRY ~n := #in~n; 21539#L6 assume !(~n < 1); 21534#L8 assume 1 == ~n;#res := 1; 21533#fiboFINAL assume true; 21525#fiboEXIT >#34#return; 21524#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 21457#fiboFINAL assume true; 21401#fiboEXIT >#32#return; 21403#L11-1 call #t~ret1 := fibo(~n - 2);< 21408#fiboENTRY ~n := #in~n; 21540#L6 assume !(~n < 1); 21535#L8 assume !(1 == ~n); 21242#L11 call #t~ret0 := fibo(~n - 1);< 21304#fiboENTRY ~n := #in~n; 21297#L6 assume !(~n < 1); 21298#L8 assume !(1 == ~n); 21258#L11 call #t~ret0 := fibo(~n - 1);< 21260#fiboENTRY ~n := #in~n; 21282#L6 assume !(~n < 1); 21278#L8 assume !(1 == ~n); 21259#L11 [2019-11-28 03:44:17,145 INFO L796 eck$LassoCheckResult]: Loop: 21259#L11 call #t~ret0 := fibo(~n - 1);< 21260#fiboENTRY ~n := #in~n; 21282#L6 assume !(~n < 1); 21278#L8 assume !(1 == ~n); 21259#L11 [2019-11-28 03:44:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1736707112, now seen corresponding path program 5 times [2019-11-28 03:44:17,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:17,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615069140] [2019-11-28 03:44:17,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 218 proven. 112 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-28 03:44:17,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615069140] [2019-11-28 03:44:17,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071366032] [2019-11-28 03:44:17,425 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:17,480 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-28 03:44:17,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:17,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 03:44:17,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 179 proven. 18 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-28 03:44:17,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:17,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 25 [2019-11-28 03:44:17,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844498478] [2019-11-28 03:44:17,592 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:17,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:17,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 6 times [2019-11-28 03:44:17,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:17,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728717718] [2019-11-28 03:44:17,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:17,600 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:17,635 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:17,636 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:17,636 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:17,636 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:17,636 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:17,636 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,636 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:17,636 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:17,637 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2019-11-28 03:44:17,637 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:17,637 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:17,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:17,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:17,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:17,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:17,709 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:17,709 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:17,722 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:17,722 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,726 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:17,726 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:17,735 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:17,735 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,738 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:17,738 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:17,746 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:17,747 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,750 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:17,750 INFO L440 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:17,756 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:17,756 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:17,770 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:17,771 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,299 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:28,303 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:28,303 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:28,303 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:28,303 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:28,303 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:28,303 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,303 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:28,303 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:28,304 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2019-11-28 03:44:28,304 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:28,304 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:28,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,359 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:28,359 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 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 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,367 INFO L120 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 [2019-11-28 03:44:28,369 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:28,369 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:28,369 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:28,369 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:28,369 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:28,370 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:28,370 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:28,371 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,375 INFO L120 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 [2019-11-28 03:44:28,377 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:28,377 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:28,377 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:28,377 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:28,377 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:28,377 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:28,378 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:28,379 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 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 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,385 INFO L120 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 [2019-11-28 03:44:28,386 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:28,386 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:28,387 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:28,387 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:28,387 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:28,388 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:28,388 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:28,390 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:28,392 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:28,393 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 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 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,396 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:28,396 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:28,396 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:28,397 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:28,398 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:28,536 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 [2019-11-28 03:44:28,536 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 03:44:28,603 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 381 states and 503 transitions. Complement of second has 18 states. [2019-11-28 03:44:28,610 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 [2019-11-28 03:44:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:28,610 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 03:44:28,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:28,611 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:28,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:28,770 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 [2019-11-28 03:44:28,771 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 03:44:28,849 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 387 states and 509 transitions. Complement of second has 17 states. [2019-11-28 03:44:28,849 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 [2019-11-28 03:44:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:28,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 03:44:28,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:28,850 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:29,007 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 [2019-11-28 03:44:29,007 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 03:44:29,077 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 490 states and 640 transitions. Complement of second has 27 states. [2019-11-28 03:44:29,077 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 [2019-11-28 03:44:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 03:44:29,078 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 03:44:29,078 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,079 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 76 letters. Loop has 4 letters. [2019-11-28 03:44:29,079 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,079 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 8 letters. [2019-11-28 03:44:29,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,080 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 490 states and 640 transitions. [2019-11-28 03:44:29,084 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:29,089 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 490 states to 371 states and 494 transitions. [2019-11-28 03:44:29,089 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 127 [2019-11-28 03:44:29,089 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2019-11-28 03:44:29,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 371 states and 494 transitions. [2019-11-28 03:44:29,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:29,090 INFO L688 BuchiCegarLoop]: Abstraction has 371 states and 494 transitions. [2019-11-28 03:44:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states and 494 transitions. [2019-11-28 03:44:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 359. [2019-11-28 03:44:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-11-28 03:44:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 480 transitions. [2019-11-28 03:44:29,098 INFO L711 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 03:44:29,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:29,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-28 03:44:29,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2019-11-28 03:44:29,099 INFO L87 Difference]: Start difference. First operand 359 states and 480 transitions. Second operand 25 states. [2019-11-28 03:44:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:29,800 INFO L93 Difference]: Finished difference Result 495 states and 691 transitions. [2019-11-28 03:44:29,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-28 03:44:29,800 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 691 transitions. [2019-11-28 03:44:29,807 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:29,807 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 0 states and 0 transitions. [2019-11-28 03:44:29,807 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 03:44:29,808 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 03:44:29,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 03:44:29,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 03:44:29,808 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:29,808 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:29,808 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:29,808 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-11-28 03:44:29,808 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 03:44:29,809 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:29,809 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 03:44:29,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:44:29 BoogieIcfgContainer [2019-11-28 03:44:29,818 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 03:44:29,818 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 03:44:29,818 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 03:44:29,818 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 03:44:29,819 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:50" (3/4) ... [2019-11-28 03:44:29,823 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 03:44:29,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 03:44:29,826 INFO L168 Benchmark]: Toolchain (without parser) took 39737.83 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 375.4 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -110.8 MB). Peak memory consumption was 264.6 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,826 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:29,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.73 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,827 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.11 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:29,827 INFO L168 Benchmark]: Boogie Preprocessor took 78.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -183.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,828 INFO L168 Benchmark]: RCFGBuilder took 218.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,828 INFO L168 Benchmark]: BuchiAutomizer took 39146.12 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 241.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.5 MB). Peak memory consumption was 285.6 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,828 INFO L168 Benchmark]: Witness Printer took 5.23 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:29,831 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 249.73 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.11 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 78.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -183.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 218.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 39146.12 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 241.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.5 MB). Peak memory consumption was 285.6 MB. Max. memory is 11.5 GB. * Witness Printer took 5.23 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 17 terminating modules (9 trivial, 3 deterministic, 5 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 deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 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. 9 modules have a trivial ranking function, the largest among these consists of 30 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 39.0s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 29.2s. Construction of modules took 2.8s. Büchi inclusion checks took 6.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 16. Automata minimization 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 402 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 761 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 5, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 350 SDtfs, 971 SDslu, 849 SDs, 0 SdLazy, 2854 SolverSat, 703 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf97 lsp96 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp77 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 31ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 23.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...