./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-2.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_5-2.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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 03:44:17,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 03:44:17,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 03:44:17,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 03:44:17,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 03:44:17,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 03:44:17,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 03:44:17,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 03:44:17,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 03:44:17,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 03:44:17,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 03:44:17,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 03:44:17,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 03:44:17,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 03:44:17,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 03:44:17,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 03:44:17,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 03:44:17,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 03:44:17,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 03:44:17,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 03:44:17,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 03:44:17,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 03:44:17,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 03:44:17,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 03:44:17,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 03:44:17,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 03:44:17,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 03:44:17,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 03:44:17,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 03:44:17,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 03:44:17,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 03:44:17,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 03:44:17,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 03:44:17,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 03:44:17,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 03:44:17,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 03:44:17,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 03:44:17,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 03:44:17,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 03:44:17,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 03:44:17,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 03:44:17,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 03:44:17,782 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 03:44:17,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 03:44:17,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 03:44:17,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 03:44:17,786 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 03:44:17,786 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 03:44:17,786 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 03:44:17,787 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 03:44:17,787 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 03:44:17,787 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 03:44:17,787 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 03:44:17,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 03:44:17,788 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 03:44:17,788 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 03:44:17,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 03:44:17,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 03:44:17,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 03:44:17,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 03:44:17,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 03:44:17,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 03:44:17,791 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 03:44:17,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 03:44:17,792 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 03:44:17,793 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 03:44:17,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 03:44:17,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 03:44:17,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 03:44:17,794 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 03:44:17,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 03:44:17,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 03:44:17,795 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 03:44:17,797 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 03:44:17,798 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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2019-11-28 03:44:18,129 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 03:44:18,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 03:44:18,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 03:44:18,149 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 03:44:18,149 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 03:44:18,150 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-28 03:44:18,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/323e7b60c/e578027976a94218a32e95bcb6cbdcd2/FLAG787c9d5fb [2019-11-28 03:44:18,695 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 03:44:18,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-28 03:44:18,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/323e7b60c/e578027976a94218a32e95bcb6cbdcd2/FLAG787c9d5fb [2019-11-28 03:44:19,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/323e7b60c/e578027976a94218a32e95bcb6cbdcd2 [2019-11-28 03:44:19,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 03:44:19,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 03:44:19,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 03:44:19,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 03:44:19,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 03:44:19,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179724bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19, skipping insertion in model container [2019-11-28 03:44:19,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 03:44:19,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 03:44:19,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:44:19,302 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 03:44:19,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:44:19,339 INFO L208 MainTranslator]: Completed translation [2019-11-28 03:44:19,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19 WrapperNode [2019-11-28 03:44:19,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 03:44:19,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 03:44:19,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 03:44:19,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 03:44:19,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 03:44:19,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 03:44:19,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 03:44:19,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 03:44:19,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 03:44:19,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 03:44:19,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 03:44:19,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 03:44:19,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (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 03:44:19,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 03:44:19,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 03:44:19,498 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 03:44:19,499 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 03:44:19,660 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 03:44:19,661 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 03:44:19,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:44:19 BoogieIcfgContainer [2019-11-28 03:44:19,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 03:44:19,663 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 03:44:19,663 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 03:44:19,666 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 03:44:19,667 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:44:19,667 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:44:19" (1/3) ... [2019-11-28 03:44:19,668 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@465e5509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:44:19, skipping insertion in model container [2019-11-28 03:44:19,668 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:44:19,668 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (2/3) ... [2019-11-28 03:44:19,669 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@465e5509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:44:19, skipping insertion in model container [2019-11-28 03:44:19,669 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:44:19,669 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:44:19" (3/3) ... [2019-11-28 03:44:19,671 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2019-11-28 03:44:19,725 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 03:44:19,725 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 03:44:19,726 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 03:44:19,726 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 03:44:19,726 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 03:44:19,726 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 03:44:19,726 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 03:44:19,727 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 03:44:19,744 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:44:19,771 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:19,772 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:19,772 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:19,780 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:44:19,780 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:19,780 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 03:44:19,780 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:44:19,783 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:19,783 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:19,783 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:19,784 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:44:19,784 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:19,790 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 03:44:19,791 INFO L796 eck$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 03:44:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 03:44:19,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:19,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253963745] [2019-11-28 03:44:19,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:19,890 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:19,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 03:44:19,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:19,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801074678] [2019-11-28 03:44:19,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:19,909 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 03:44:19,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:19,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120211999] [2019-11-28 03:44:19,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:19,932 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:20,098 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:20,099 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:20,099 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:20,099 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:20,100 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:20,100 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,100 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:20,100 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:20,100 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2019-11-28 03:44:20,101 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:20,101 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:20,119 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 03:44:20,127 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 03:44:20,130 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 03:44:20,135 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 03:44:20,138 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 03:44:20,254 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:20,254 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) [2019-11-28 03:44:20,263 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,264 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,276 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:20,276 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe 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) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,297 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,297 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:20,303 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:20,303 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 03:44:20,319 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,319 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 03:44:20,325 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:20,325 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,345 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,345 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:20,350 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:20,350 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 03:44:20,364 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,364 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) [2019-11-28 03:44:20,387 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:20,388 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:20,406 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:20,409 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:20,410 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:20,410 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:20,410 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:20,410 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:20,410 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,411 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:20,411 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:20,411 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2019-11-28 03:44:20,411 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:20,411 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:20,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,422 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 03:44:20,428 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 03:44:20,433 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 03:44:20,437 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 03:44:20,504 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:20,510 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 03:44:20,522 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 03:44:20,525 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,525 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,526 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,526 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,526 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:20,529 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,529 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,533 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) [2019-11-28 03:44:20,551 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 03:44:20,554 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,554 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,555 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,555 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,555 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:20,556 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,557 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,559 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 03:44:20,570 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 03:44:20,572 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,573 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,573 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,573 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,573 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:20,574 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,575 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:20,577 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 03:44:20,593 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 03:44:20,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,595 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,595 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:20,597 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,597 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:20,599 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 03:44:20,607 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 03:44:20,610 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,610 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,610 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,611 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,611 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,613 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,613 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:20,616 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:20,622 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:20,622 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) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,632 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:20,632 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:20,632 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:20,633 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 03:44:20,638 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:20,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:20,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:44:20,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:20,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:20,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:20,753 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 03:44:20,774 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 03:44:20,776 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 03:44:20,927 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 03:44:20,928 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 03:44:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:44:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 03:44:20,934 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 03:44:20,936 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:20,937 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 03:44:20,937 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:20,937 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 03:44:20,938 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:20,939 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 03:44:20,945 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:20,953 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 03:44:20,955 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 03:44:20,955 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 03:44:20,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 03:44:20,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:20,959 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 03:44:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 03:44:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 03:44:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 03:44:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 03:44:20,994 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:44:20,994 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:44:20,995 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 03:44:20,995 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 03:44:20,996 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:20,996 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:20,996 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:20,998 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:20,998 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:20,998 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 03:44:20,998 INFO L796 eck$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 03:44:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 03:44:20,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:20,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746748426] [2019-11-28 03:44:21,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,121 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 03:44:21,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746748426] [2019-11-28 03:44:21,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385098137] [2019-11-28 03:44:21,125 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 03:44:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:21,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:21,195 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 03:44:21,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:21,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:44:21,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692906851] [2019-11-28 03:44:21,204 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 03:44:21,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057457097] [2019-11-28 03:44:21,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 03:44:21,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057457097] [2019-11-28 03:44:21,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 03:44:21,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 03:44:21,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541286176] [2019-11-28 03:44:21,281 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:44:21,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 03:44:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 03:44:21,286 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 03:44:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:21,374 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 03:44:21,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 03:44:21,376 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 03:44:21,378 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:21,379 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 03:44:21,380 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 03:44:21,380 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 03:44:21,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 03:44:21,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:21,381 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:44:21,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 03:44:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 03:44:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 03:44:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 03:44:21,385 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:44:21,385 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:44:21,386 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 03:44:21,386 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 03:44:21,387 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:21,387 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:21,387 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:21,388 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:21,388 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:21,389 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 03:44:21,389 INFO L796 eck$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 03:44:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 03:44:21,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117526738] [2019-11-28 03:44:21,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,472 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 03:44:21,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117526738] [2019-11-28 03:44:21,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893169785] [2019-11-28 03:44:21,474 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:21,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:21,533 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 03:44:21,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:21,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:44:21,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020701931] [2019-11-28 03:44:21,535 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 03:44:21,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828507041] [2019-11-28 03:44:21,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,561 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:21,703 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:21,703 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:21,703 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:21,703 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:21,703 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:21,703 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:21,704 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:21,704 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:21,704 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2019-11-28 03:44:21,704 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:21,704 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:21,706 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 03:44:21,714 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 03:44:21,719 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 03:44:21,721 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 03:44:21,775 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:21,775 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 03:44:21,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:21,790 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) [2019-11-28 03:44:21,815 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:21,815 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:22,268 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:22,271 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:22,271 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:22,271 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:22,271 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:22,271 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:22,272 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:22,272 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:22,272 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:22,272 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2019-11-28 03:44:22,272 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:22,272 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:22,274 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 03:44:22,283 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 03:44:22,291 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 03:44:22,294 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 03:44:22,343 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:22,344 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 03:44:22,349 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 03:44:22,351 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:22,351 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:22,352 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:22,352 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:22,352 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:22,353 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:22,354 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 03:44:22,356 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 03:44:22,370 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 03:44:22,372 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:22,372 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:22,372 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:22,373 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:22,373 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:22,375 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:22,375 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:22,378 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:22,383 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:22,383 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 03:44:22,394 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:22,394 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:22,394 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:22,394 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:22,399 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 03:44:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:22,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 03:44:22,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:22,572 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 03:44:22,572 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 03:44:22,573 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-28 03:44:22,796 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 03:44:22,798 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 03:44:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 03:44:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 03:44:22,801 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 03:44:22,801 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:22,802 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 03:44:22,802 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:22,805 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 03:44:22,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:22,806 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 03:44:22,819 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:44:22,826 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 03:44:22,827 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 03:44:22,828 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:44:22,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 03:44:22,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:22,829 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 03:44:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 03:44:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 03:44:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:44:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 03:44:22,854 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 03:44:22,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 03:44:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 03:44:22,856 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-28 03:44:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:23,018 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 03:44:23,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 03:44:23,022 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 03:44:23,027 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:44:23,034 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 03:44:23,034 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 03:44:23,036 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:44:23,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 03:44:23,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:23,036 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 03:44:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 03:44:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 03:44:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:44:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 03:44:23,051 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:44:23,051 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:44:23,051 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 03:44:23,051 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-28 03:44:23,053 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:44:23,053 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:23,054 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:23,055 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:23,056 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 03:44:23,056 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 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 03:44:23,056 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 03:44:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:23,057 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 03:44:23,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:23,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346525488] [2019-11-28 03:44:23,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,190 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 03:44:23,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346525488] [2019-11-28 03:44:23,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784395197] [2019-11-28 03:44:23,191 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 03:44:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 03:44:23,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:23,263 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 03:44:23,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:23,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 03:44:23,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392564744] [2019-11-28 03:44:23,264 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 03:44:23,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:23,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448227884] [2019-11-28 03:44:23,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,386 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 03:44:23,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448227884] [2019-11-28 03:44:23,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596022233] [2019-11-28 03:44:23,388 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) [2019-11-28 03:44:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:23,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:23,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:23,462 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 03:44:23,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:23,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 03:44:23,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790957339] [2019-11-28 03:44:23,465 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:44:23,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 03:44:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 03:44:23,466 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 03:44:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:23,722 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-11-28 03:44:23,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 03:44:23,723 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 158 transitions. [2019-11-28 03:44:23,726 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:44:23,730 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 156 transitions. [2019-11-28 03:44:23,730 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 03:44:23,731 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 03:44:23,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 156 transitions. [2019-11-28 03:44:23,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:23,731 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-28 03:44:23,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 156 transitions. [2019-11-28 03:44:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 03:44:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 03:44:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2019-11-28 03:44:23,743 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-28 03:44:23,743 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-28 03:44:23,744 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 03:44:23,744 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 156 transitions. [2019-11-28 03:44:23,746 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:44:23,746 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:23,746 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:23,748 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:23,748 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 03:44:23,748 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 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 03:44:23,748 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 03:44:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 03:44:23,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:23,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075199788] [2019-11-28 03:44:23,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:23,786 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:23,787 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 03:44:23,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:23,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652422621] [2019-11-28 03:44:23,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:23,815 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:23,819 INFO L82 PathProgramCache]: Analyzing trace with hash 560101880, now seen corresponding path program 3 times [2019-11-28 03:44:23,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:23,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884743917] [2019-11-28 03:44:23,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-28 03:44:23,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884743917] [2019-11-28 03:44:23,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922819985] [2019-11-28 03:44:23,989 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 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 03:44:24,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 03:44:24,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:24,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:24,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-28 03:44:24,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:24,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-28 03:44:24,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009206661] [2019-11-28 03:44:24,346 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:24,346 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:24,346 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:24,346 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:24,347 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:24,347 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,347 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:24,347 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:24,347 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2019-11-28 03:44:24,347 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:24,347 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:24,348 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 03:44:24,351 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 03:44:24,353 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 03:44:24,355 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 03:44:24,433 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:24,434 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) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,444 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:24,444 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:24,447 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:24,447 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) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:24,454 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:24,458 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:24,458 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) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,464 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:24,465 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:24,467 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:24,468 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) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,475 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:24,475 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 03:44:24,493 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:24,493 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:25,013 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:25,015 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:25,016 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:25,016 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:25,016 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:25,016 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:25,016 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:25,016 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:25,016 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:25,016 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2019-11-28 03:44:25,016 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:25,016 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:25,017 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 03:44:25,019 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 03:44:25,022 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 03:44:25,033 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 03:44:25,105 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:25,106 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 03:44:25,111 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 03:44:25,113 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:25,113 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:25,113 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:25,113 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:25,113 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:25,114 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:25,114 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:25,116 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 03:44:25,122 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 03:44:25,123 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:25,123 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:25,123 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:25,123 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:25,123 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:25,124 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:25,124 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:25,131 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) [2019-11-28 03:44:25,141 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 03:44:25,143 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:25,143 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:25,143 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:25,143 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:25,143 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:25,148 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:25,148 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:25,155 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:25,158 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 03:44:25,158 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 03:44:25,165 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:25,165 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:25,165 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:25,165 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:25,173 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:25,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,364 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 03:44:25,365 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 03:44:25,365 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-28 03:44:25,580 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 182 states and 248 transitions. Complement of second has 33 states. [2019-11-28 03:44:25,580 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 03:44:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:44:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 03:44:25,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:44:25,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:25,582 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,743 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 03:44:25,743 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 03:44:25,744 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-28 03:44:25,955 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 307 states and 417 transitions. Complement of second has 25 states. [2019-11-28 03:44:25,957 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 03:44:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:44:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 03:44:25,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:44:25,959 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:25,959 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:26,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:26,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:26,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:26,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:26,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:44:26,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:26,181 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 03:44:26,181 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 03:44:26,182 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 03:44:26,439 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 1077 states and 1514 transitions. Complement of second has 130 states. [2019-11-28 03:44:26,439 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 03:44:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:44:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 03:44:26,440 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:44:26,441 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:26,442 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 03:44:26,443 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:26,443 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 03:44:26,445 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:26,445 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1514 transitions. [2019-11-28 03:44:26,465 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 03:44:26,485 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 937 transitions. [2019-11-28 03:44:26,486 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 03:44:26,488 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 03:44:26,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 937 transitions. [2019-11-28 03:44:26,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:26,490 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 937 transitions. [2019-11-28 03:44:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 937 transitions. [2019-11-28 03:44:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 475. [2019-11-28 03:44:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-11-28 03:44:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 723 transitions. [2019-11-28 03:44:26,542 INFO L711 BuchiCegarLoop]: Abstraction has 475 states and 723 transitions. [2019-11-28 03:44:26,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 03:44:26,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-28 03:44:26,543 INFO L87 Difference]: Start difference. First operand 475 states and 723 transitions. Second operand 16 states. [2019-11-28 03:44:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:26,907 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2019-11-28 03:44:26,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-28 03:44:26,908 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 150 states and 188 transitions. [2019-11-28 03:44:26,910 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-28 03:44:26,913 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 150 states to 150 states and 188 transitions. [2019-11-28 03:44:26,914 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 80 [2019-11-28 03:44:26,915 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2019-11-28 03:44:26,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 188 transitions. [2019-11-28 03:44:26,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:26,916 INFO L688 BuchiCegarLoop]: Abstraction has 150 states and 188 transitions. [2019-11-28 03:44:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states and 188 transitions. [2019-11-28 03:44:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 121. [2019-11-28 03:44:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-28 03:44:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2019-11-28 03:44:26,930 INFO L711 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-28 03:44:26,931 INFO L591 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-28 03:44:26,931 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 03:44:26,931 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 121 states and 142 transitions. [2019-11-28 03:44:26,932 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-28 03:44:26,933 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:26,933 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:26,937 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 03:44:26,937 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:26,939 INFO L794 eck$LassoCheckResult]: Stem: 4528#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 4529#L25 call main_#t~ret2 := fibo(main_~x~0);< 4551#fiboENTRY ~n := #in~n; 4549#L6 assume !(~n < 1); 4550#L8 assume !(1 == ~n); 4540#L11 call #t~ret0 := fibo(~n - 1);< 4539#fiboENTRY ~n := #in~n; 4541#L6 assume !(~n < 1); 4574#L8 assume !(1 == ~n); 4533#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4572#L6 assume !(~n < 1); 4532#L8 assume !(1 == ~n); 4534#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4572#L6 assume !(~n < 1); 4532#L8 assume !(1 == ~n); 4534#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4573#L6 assume !(~n < 1); 4610#L8 assume 1 == ~n;#res := 1; 4609#fiboFINAL assume true; 4608#fiboEXIT >#32#return; 4605#L11-1 call #t~ret1 := fibo(~n - 2);< 4607#fiboENTRY ~n := #in~n; 4629#L6 assume ~n < 1;#res := 0; 4627#fiboFINAL assume true; 4625#fiboEXIT >#34#return; 4624#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 4623#fiboFINAL assume true; 4595#fiboEXIT >#32#return; 4576#L11-1 call #t~ret1 := fibo(~n - 2);< 4587#fiboENTRY ~n := #in~n; 4628#L6 assume ~n < 1;#res := 0; 4626#fiboFINAL assume true; 4585#fiboEXIT >#34#return; 4583#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 4581#fiboFINAL assume true; 4575#fiboEXIT >#32#return; 4562#L11-1 call #t~ret1 := fibo(~n - 2);< 4568#fiboENTRY ~n := #in~n; 4567#L6 assume !(~n < 1); 4564#L8 assume !(1 == ~n); 4566#L11 call #t~ret0 := fibo(~n - 1);< 4620#fiboENTRY ~n := #in~n; 4633#L6 assume !(~n < 1); 4634#L8 assume !(1 == ~n); 4520#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-11-28 03:44:26,940 INFO L796 eck$LassoCheckResult]: Loop: 4547#fiboENTRY ~n := #in~n; 4636#L6 assume !(~n < 1); 4631#L8 assume !(1 == ~n); 4519#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-11-28 03:44:26,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:26,940 INFO L82 PathProgramCache]: Analyzing trace with hash -918730881, now seen corresponding path program 4 times [2019-11-28 03:44:26,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:26,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541074859] [2019-11-28 03:44:26,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 73 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-28 03:44:27,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541074859] [2019-11-28 03:44:27,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402889201] [2019-11-28 03:44:27,163 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 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 03:44:27,202 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 03:44:27,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:27,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-28 03:44:27,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:27,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-11-28 03:44:27,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254284938] [2019-11-28 03:44:27,316 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 03:44:27,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:27,317 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458960571] [2019-11-28 03:44:27,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:27,324 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:27,353 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:27,353 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:27,353 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:27,353 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:27,353 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:27,353 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,353 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:27,353 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:27,353 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2019-11-28 03:44:27,354 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:27,354 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:27,355 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 03:44:27,357 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 03:44:27,359 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 03:44:27,361 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 03:44:27,367 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 03:44:27,410 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:27,411 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 03:44:27,415 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:27,415 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 03:44:27,419 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:27,419 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) [2019-11-28 03:44:27,425 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:27,425 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,429 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:27,429 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) [2019-11-28 03:44:27,435 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:27,435 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,438 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:27,438 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) [2019-11-28 03:44:27,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:27,445 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 37 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:27,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:27,454 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,503 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:27,504 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:27,505 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:27,505 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:27,505 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:27,505 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:27,505 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,505 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:27,505 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:27,505 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2019-11-28 03:44:27,506 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:27,506 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:27,507 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 03:44:27,508 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 03:44:27,509 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 03:44:27,512 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 03:44:27,519 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 03:44:27,560 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:27,561 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 03:44:27,568 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 03:44:27,570 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:27,570 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:27,570 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:27,570 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:27,570 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:27,571 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:27,571 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:27,573 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 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 03:44:27,578 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 03:44:27,579 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:27,579 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:27,579 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:27,579 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:27,580 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:27,580 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:27,580 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:27,582 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 03:44:27,588 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 03:44:27,590 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:27,590 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:27,590 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:27,590 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:27,590 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:27,590 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:27,590 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:27,592 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 03:44:27,598 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 03:44:27,599 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:27,599 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:27,600 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:27,600 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:27,600 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:27,601 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:27,601 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:27,602 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:27,604 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:27,605 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) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,609 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:27,609 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:27,609 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:27,609 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 03:44:27,611 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,745 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 03:44:27,745 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 03:44:27,746 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-28 03:44:27,816 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-28 03:44:27,817 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 03:44:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:44:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:44:27,817 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-28 03:44:27,817 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:27,817 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,902 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,927 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 03:44:27,928 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 03:44:27,928 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-28 03:44:27,985 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-28 03:44:27,986 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 03:44:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:44:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:44:27,986 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-28 03:44:27,987 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:27,987 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,116 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 03:44:28,117 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 03:44:28,117 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-28 03:44:28,208 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 170 states and 193 transitions. Complement of second has 14 states. [2019-11-28 03:44:28,210 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 03:44:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:44:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 03:44:28,210 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-28 03:44:28,211 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:28,211 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 52 letters. Loop has 4 letters. [2019-11-28 03:44:28,212 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:28,212 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 8 letters. [2019-11-28 03:44:28,212 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:28,212 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 193 transitions. [2019-11-28 03:44:28,215 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:28,215 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2019-11-28 03:44:28,215 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 03:44:28,215 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 03:44:28,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 03:44:28,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 03:44:28,216 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:28,216 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:28,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:28,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-28 03:44:28,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-11-28 03:44:28,217 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 19 states. [2019-11-28 03:44:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:28,217 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-28 03:44:28,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 03:44:28,217 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-28 03:44:28,217 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:28,218 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 03:44:28,218 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 03:44:28,218 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 03:44:28,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 03:44:28,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 03:44:28,218 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:28,218 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:28,218 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:28,218 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 03:44:28,218 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 03:44:28,219 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:28,219 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 03:44:28,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:44:28 BoogieIcfgContainer [2019-11-28 03:44:28,226 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 03:44:28,226 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 03:44:28,227 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 03:44:28,227 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 03:44:28,227 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:44:19" (3/4) ... [2019-11-28 03:44:28,231 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 03:44:28,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 03:44:28,234 INFO L168 Benchmark]: Toolchain (without parser) took 9149.89 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 297.8 MB). Free memory was 960.4 MB in the beginning and 959.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 299.2 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:28,235 INFO L168 Benchmark]: CDTParser took 0.16 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 03:44:28,235 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.90 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:28,236 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -176.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:28,237 INFO L168 Benchmark]: Boogie Preprocessor took 15.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:28,237 INFO L168 Benchmark]: RCFGBuilder took 219.43 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: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:28,238 INFO L168 Benchmark]: BuchiAutomizer took 8563.42 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 168.8 MB). Free memory was 1.1 GB in the beginning and 959.0 MB in the end (delta: 149.2 MB). Peak memory consumption was 318.0 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:28,238 INFO L168 Benchmark]: Witness Printer took 4.90 ms. Allocated memory is still 1.3 GB. Free memory is still 959.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:28,242 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 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 257.90 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 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 83.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -176.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 219.43 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: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 8563.42 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 168.8 MB). Free memory was 1.1 GB in the beginning and 959.0 MB in the end (delta: 149.2 MB). Peak memory consumption was 318.0 MB. Max. memory is 11.5 GB. * Witness Printer took 4.90 ms. Allocated memory is still 1.3 GB. Free memory is still 959.0 MB. 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 9 terminating modules (5 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.5s and 7 iterations. TraceHistogramMax:9. Analysis of lassos took 4.6s. Construction of modules took 0.8s. Büchi inclusion checks took 2.6s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 189 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 121 states and ocurred in iteration 5. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 144 SDtfs, 387 SDslu, 153 SDs, 0 SdLazy, 699 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp79 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 21ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...