./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_10-1.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 1ca069cb8d4103e8fb4700634948424bd87542bc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 03:43:48,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 03:43:48,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 03:43:48,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 03:43:48,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 03:43:48,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 03:43:48,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 03:43:48,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 03:43:48,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 03:43:48,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 03:43:48,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 03:43:48,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 03:43:48,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 03:43:48,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 03:43:48,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 03:43:48,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 03:43:48,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 03:43:48,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 03:43:48,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 03:43:48,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 03:43:48,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 03:43:48,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 03:43:48,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 03:43:48,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 03:43:48,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 03:43:48,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 03:43:48,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 03:43:48,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 03:43:48,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 03:43:48,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 03:43:48,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 03:43:48,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 03:43:48,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 03:43:48,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 03:43:48,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 03:43:48,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 03:43:48,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 03:43:48,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 03:43:48,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 03:43:48,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 03:43:48,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 03:43:48,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 03:43:48,703 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 03:43:48,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 03:43:48,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 03:43:48,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 03:43:48,706 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 03:43:48,706 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 03:43:48,706 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 03:43:48,707 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 03:43:48,707 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 03:43:48,707 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 03:43:48,707 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 03:43:48,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 03:43:48,708 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 03:43:48,708 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 03:43:48,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 03:43:48,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 03:43:48,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 03:43:48,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 03:43:48,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 03:43:48,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 03:43:48,710 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 03:43:48,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 03:43:48,711 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 03:43:48,711 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 03:43:48,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 03:43:48,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 03:43:48,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 03:43:48,712 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 03:43:48,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 03:43:48,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 03:43:48,713 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 03:43:48,714 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 03:43:48,715 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 -> 1ca069cb8d4103e8fb4700634948424bd87542bc [2019-11-28 03:43:49,051 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 03:43:49,065 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 03:43:49,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 03:43:49,071 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 03:43:49,071 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 03:43:49,072 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2019-11-28 03:43:49,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc031afe/c75456aa35c24dcd8bb6e1fc6aab2dd3/FLAG515ee31f3 [2019-11-28 03:43:49,616 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 03:43:49,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2019-11-28 03:43:49,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc031afe/c75456aa35c24dcd8bb6e1fc6aab2dd3/FLAG515ee31f3 [2019-11-28 03:43:50,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc031afe/c75456aa35c24dcd8bb6e1fc6aab2dd3 [2019-11-28 03:43:50,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 03:43:50,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 03:43:50,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 03:43:50,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 03:43:50,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 03:43:50,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31007272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50, skipping insertion in model container [2019-11-28 03:43:50,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 03:43:50,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 03:43:50,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:43:50,265 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 03:43:50,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:43:50,298 INFO L208 MainTranslator]: Completed translation [2019-11-28 03:43:50,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50 WrapperNode [2019-11-28 03:43:50,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 03:43:50,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 03:43:50,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 03:43:50,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 03:43:50,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 03:43:50,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 03:43:50,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 03:43:50,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 03:43:50,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... [2019-11-28 03:43:50,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 03:43:50,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 03:43:50,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 03:43:50,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 03:43:50,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 03:43:50,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 03:43:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 03:43:50,515 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 03:43:50,703 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 03:43:50,704 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 03:43:50,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:50 BoogieIcfgContainer [2019-11-28 03:43:50,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 03:43:50,706 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 03:43:50,706 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 03:43:50,710 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 03:43:50,712 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:43:50,713 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:43:50" (1/3) ... [2019-11-28 03:43:50,714 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@ddfa474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:43:50, skipping insertion in model container [2019-11-28 03:43:50,714 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:43:50,715 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:43:50" (2/3) ... [2019-11-28 03:43:50,715 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@ddfa474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:43:50, skipping insertion in model container [2019-11-28 03:43:50,715 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:43:50,716 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:50" (3/3) ... [2019-11-28 03:43:50,718 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2019-11-28 03:43:50,834 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 03:43:50,837 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 03:43:50,837 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 03:43:50,837 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 03:43:50,837 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 03:43:50,838 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 03:43:50,838 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 03:43:50,838 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 03:43:50,857 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:43:50,888 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:50,889 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:50,889 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:50,898 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:43:50,898 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:43:50,898 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 03:43:50,898 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:43:50,901 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:50,901 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:50,902 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:50,902 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:43:50,902 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:43:50,910 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 03:43:50,910 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-11-28 03:43:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 03:43:50,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:50,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150885179] [2019-11-28 03:43:50,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:51,025 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:51,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 03:43:51,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:51,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185330482] [2019-11-28 03:43:51,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:51,041 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:51,043 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 03:43:51,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:51,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241651071] [2019-11-28 03:43:51,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:51,059 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:51,188 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:51,189 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:51,189 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:51,190 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:51,190 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:43:51,190 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,190 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:51,190 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:51,191 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2019-11-28 03:43:51,191 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:51,191 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:51,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,294 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:51,295 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,304 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,304 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:51,313 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:51,316 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,324 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,324 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:51,327 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:51,328 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,341 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,341 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,345 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:51,346 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 03:43:51,352 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,352 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:51,361 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:51,361 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,382 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:51,382 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 03:43:51,409 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:43:51,410 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,426 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:43:51,429 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:51,429 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:51,429 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:51,429 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:51,430 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:43:51,430 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,430 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:51,430 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:51,430 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2019-11-28 03:43:51,430 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:51,430 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:51,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,454 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:51,539 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:51,545 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,565 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:51,568 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,569 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,570 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,570 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,570 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,573 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:51,574 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:51,577 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,593 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:51,596 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,596 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,596 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,597 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:51,597 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,598 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:51,598 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 03:43:51,603 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) [2019-11-28 03:43:51,614 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:51,616 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,616 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,616 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,617 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:51,617 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,621 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,622 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:51,625 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) [2019-11-28 03:43:51,640 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:51,643 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,643 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,643 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,644 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:51,644 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,646 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:51,648 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,654 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,672 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:51,675 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:51,675 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:51,676 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:51,676 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:51,676 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:51,679 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:51,679 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:51,685 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,692 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:43:51,692 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:51,709 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:43:51,709 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:43:51,710 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:43:51,711 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 03:43:51,720 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:51,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:51,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:43:51,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:51,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:43:51,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:51,870 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-28 03:43:51,872 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 03:43:52,009 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-11-28 03:43:52,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:43:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 03:43:52,016 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 03:43:52,018 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:52,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 03:43:52,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:52,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 03:43:52,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:52,021 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 03:43:52,026 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:52,035 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 03:43:52,036 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 03:43:52,037 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 03:43:52,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 03:43:52,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:52,040 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 03:43:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 03:43:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 03:43:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 03:43:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 03:43:52,077 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:43:52,078 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:43:52,078 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 03:43:52,078 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 03:43:52,080 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:52,080 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:52,080 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:52,082 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:52,082 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:52,082 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 03:43:52,083 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 03:43:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:52,083 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 03:43:52,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:52,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4916924] [2019-11-28 03:43:52,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:52,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4916924] [2019-11-28 03:43:52,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986246235] [2019-11-28 03:43:52,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:43:52,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:52,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:52,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:43:52,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346920031] [2019-11-28 03:43:52,272 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:52,272 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 03:43:52,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:52,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840785435] [2019-11-28 03:43:52,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 03:43:52,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840785435] [2019-11-28 03:43:52,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 03:43:52,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 03:43:52,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469553823] [2019-11-28 03:43:52,356 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:43:52,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:52,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 03:43:52,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 03:43:52,361 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 03:43:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:52,458 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 03:43:52,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 03:43:52,459 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 03:43:52,461 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:52,463 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 03:43:52,463 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 03:43:52,464 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 03:43:52,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 03:43:52,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:52,464 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:43:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 03:43:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 03:43:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 03:43:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 03:43:52,469 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:43:52,469 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:43:52,470 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 03:43:52,470 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 03:43:52,471 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:43:52,471 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:52,471 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:52,472 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:52,472 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:52,473 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 03:43:52,473 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 03:43:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 03:43:52,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:52,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315206459] [2019-11-28 03:43:52,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:52,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315206459] [2019-11-28 03:43:52,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301445690] [2019-11-28 03:43:52,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 03:43:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:52,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:43:52,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:52,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:52,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:43:52,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026838042] [2019-11-28 03:43:52,593 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:52,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 03:43:52,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:52,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193238409] [2019-11-28 03:43:52,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:52,622 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:52,766 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:52,767 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:52,767 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:52,767 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:52,767 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:43:52,767 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:52,767 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:52,768 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:52,768 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2019-11-28 03:43:52,768 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:52,768 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:52,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:52,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:52,786 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:52,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:52,847 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:52,847 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:52,863 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:52,863 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 03:43:52,884 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:43:52,884 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 03:43:53,320 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:43:53,326 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:53,327 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:53,327 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:53,327 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:53,327 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:43:53,327 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:53,328 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:53,328 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:53,328 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2019-11-28 03:43:53,328 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:53,328 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:53,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:53,353 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 03:43:53,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:53,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:53,407 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:53,407 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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:53,420 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:53,423 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:53,423 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:53,423 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:53,423 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:53,424 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:53,425 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:53,425 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:53,427 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:53,439 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:53,441 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:53,442 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:53,442 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:53,442 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:53,442 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:53,444 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:53,444 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:53,448 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:43:53,453 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:43:53,454 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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:53,474 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:43:53,474 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:43:53,475 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:43:53,475 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:43:53,477 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:43:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:53,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:43:53,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:53,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 03:43:53,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:53,635 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-11-28 03:43:53,635 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-28 03:43:53,867 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-11-28 03:43:53,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 03:43:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 03:43:53,872 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 03:43:53,873 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:53,873 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 03:43:53,876 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:53,876 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 03:43:53,908 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:53,908 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 03:43:53,936 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:43:53,946 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 03:43:53,946 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 03:43:53,948 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:43:53,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 03:43:53,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:53,949 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 03:43:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 03:43:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 03:43:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:43:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 03:43:53,985 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 03:43:53,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 03:43:53,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 03:43:53,986 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-28 03:43:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:54,110 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 03:43:54,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 03:43:54,112 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 03:43:54,120 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:43:54,124 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 03:43:54,124 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 03:43:54,125 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:43:54,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 03:43:54,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:54,125 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 03:43:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 03:43:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 03:43:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:43:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 03:43:54,139 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:43:54,139 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:43:54,139 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 03:43:54,139 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-28 03:43:54,141 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:43:54,141 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:54,141 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:54,145 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:54,145 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 03:43:54,145 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 03:43:54,146 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~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 03:43:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 03:43:54,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:54,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993364357] [2019-11-28 03:43:54,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:43:54,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993364357] [2019-11-28 03:43:54,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764898375] [2019-11-28 03:43:54,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 03:43:54,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:43:54,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:54,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 03:43:54,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357718587] [2019-11-28 03:43:54,376 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 03:43:54,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:54,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662865539] [2019-11-28 03:43:54,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-28 03:43:54,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662865539] [2019-11-28 03:43:54,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765033751] [2019-11-28 03:43:54,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:43:54,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-28 03:43:54,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:54,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 03:43:54,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127209382] [2019-11-28 03:43:54,580 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:43:54,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 03:43:54,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 03:43:54,581 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 03:43:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:54,828 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-28 03:43:54,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 03:43:54,829 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-28 03:43:54,834 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:43:54,837 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-28 03:43:54,838 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 03:43:54,838 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 03:43:54,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-28 03:43:54,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:54,839 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:43:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-28 03:43:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 03:43:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 03:43:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-28 03:43:54,850 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:43:54,851 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:43:54,851 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 03:43:54,851 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-28 03:43:54,853 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:43:54,853 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:54,853 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:54,855 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:54,855 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 03:43:54,855 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 03:43:54,856 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~ret0;havoc #t~ret1; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 03:43:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 03:43:54,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:54,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419591740] [2019-11-28 03:43:54,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:43:54,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419591740] [2019-11-28 03:43:54,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411464390] [2019-11-28 03:43:54,993 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:55,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 03:43:55,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:43:55,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:43:55,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:43:55,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:55,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-28 03:43:55,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344893860] [2019-11-28 03:43:55,071 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:55,072 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 03:43:55,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:55,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869261073] [2019-11-28 03:43:55,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:55,106 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:55,374 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:55,375 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:55,375 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:55,375 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:55,375 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:43:55,375 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:55,375 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:55,375 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:55,375 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2019-11-28 03:43:55,376 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:55,376 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:55,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:55,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:55,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:55,384 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:55,458 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:55,458 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 03:43:55,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:55,473 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:55,476 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:55,476 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 03:43:55,482 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:55,482 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:55,485 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:55,485 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:55,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:55,498 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:55,502 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:55,502 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=1} Honda state: {fibo_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:55,510 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:55,511 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:55,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:43:55,523 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:56,088 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:43:56,091 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:56,091 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:56,091 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:56,091 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:56,091 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:43:56,092 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:56,092 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:56,092 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:56,092 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2019-11-28 03:43:56,092 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:56,092 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:56,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:56,101 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:56,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:56,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:56,205 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:56,206 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:56,222 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:56,224 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:56,224 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:56,225 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:56,226 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:56,226 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:56,228 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:56,228 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:56,229 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:56,236 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:56,237 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:56,238 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:56,238 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:56,238 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:56,238 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:56,238 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:56,238 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:56,240 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:56,247 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:56,248 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:56,249 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:56,249 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:56,249 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:56,249 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:56,250 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:56,250 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:56,254 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:43:56,259 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 03:43:56,259 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:56,274 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:43:56,274 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:43:56,275 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:43:56,275 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:43:56,285 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:56,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:56,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:43:56,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:56,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:56,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:56,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:43:56,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 03:43:56,484 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 03:43:56,484 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:43:56,723 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 182 states and 247 transitions. Complement of second has 33 states. [2019-11-28 03:43:56,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:43:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 03:43:56,725 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:43:56,726 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:56,726 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:43:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:56,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:43:56,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:56,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:56,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:56,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:43:56,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 03:43:56,894 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 03:43:56,894 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:43:57,079 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 307 states and 416 transitions. Complement of second has 25 states. [2019-11-28 03:43:57,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:43:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 03:43:57,081 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:43:57,082 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:57,082 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:43:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:57,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:43:57,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:57,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:57,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:43:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:57,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:43:57,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 03:43:57,266 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 03:43:57,266 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:43:57,541 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 1077 states and 1512 transitions. Complement of second has 130 states. [2019-11-28 03:43:57,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:43:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 03:43:57,543 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:43:57,544 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:57,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 03:43:57,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:57,546 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 03:43:57,547 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:57,548 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-11-28 03:43:57,567 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 03:43:57,584 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-11-28 03:43:57,585 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 03:43:57,586 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 03:43:57,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-11-28 03:43:57,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:57,587 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-11-28 03:43:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-11-28 03:43:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-11-28 03:43:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-28 03:43:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-11-28 03:43:57,645 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-11-28 03:43:57,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:57,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 03:43:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 03:43:57,646 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-11-28 03:43:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:57,935 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-11-28 03:43:57,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 03:43:57,936 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-11-28 03:43:57,944 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:57,954 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-11-28 03:43:57,954 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-11-28 03:43:57,954 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-11-28 03:43:57,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-11-28 03:43:57,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:57,955 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-11-28 03:43:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-11-28 03:43:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-11-28 03:43:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-28 03:43:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-28 03:43:57,985 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 03:43:57,985 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 03:43:57,985 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 03:43:57,985 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-11-28 03:43:57,990 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:57,990 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:57,990 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:57,992 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:57,992 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:43:57,992 INFO L794 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4845#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4953#fiboEXIT >#32#return; 4933#L11-1 call #t~ret1 := fibo(~n - 2);< 4941#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4957#L8 assume !(1 == ~n); 4958#L11 call #t~ret0 := fibo(~n - 1);< 4967#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 03:43:57,992 INFO L796 eck$LassoCheckResult]: Loop: 5054#fiboENTRY ~n := #in~n; 5065#L6 assume !(~n < 1); 5062#L8 assume !(1 == ~n); 5051#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 03:43:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:57,993 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-11-28 03:43:57,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:57,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490203557] [2019-11-28 03:43:57,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:58,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490203557] [2019-11-28 03:43:58,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957497475] [2019-11-28 03:43:58,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 03:43:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:43:58,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:43:58,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 03:43:58,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:43:58,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-11-28 03:43:58,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988472875] [2019-11-28 03:43:58,286 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:43:58,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:58,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 03:43:58,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:58,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502598817] [2019-11-28 03:43:58,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:43:58,294 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:43:58,330 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:58,330 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:58,331 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:58,331 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:58,331 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:43:58,331 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,331 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:58,331 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:58,331 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2019-11-28 03:43:58,331 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:58,331 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:58,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,348 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 03:43:58,390 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:58,390 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:58,402 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:58,402 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,409 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:58,410 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 03:43:58,417 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:58,417 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 03:43:58,421 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:58,421 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 03:43:58,429 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:58,429 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 03:43:58,433 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:43:58,433 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,441 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:43:58,441 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,452 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:43:58,452 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:43:58,496 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:43:58,497 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:43:58,498 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:43:58,498 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:43:58,498 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:43:58,498 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:43:58,498 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,498 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:43:58,498 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:43:58,498 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2019-11-28 03:43:58,498 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:43:58,499 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:43:58,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:43:58,512 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 03:43:58,568 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:43:58,568 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) [2019-11-28 03:43:58,575 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:58,576 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:58,577 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:58,577 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:58,577 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:58,577 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:58,579 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:58,579 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,582 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,590 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:58,592 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:58,592 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:58,592 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:58,592 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:58,592 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:58,593 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:58,593 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:58,594 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,601 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:58,602 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:58,602 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:58,602 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:58,602 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:58,602 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:58,603 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:58,603 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:58,605 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,610 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:43:58,612 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:43:58,612 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:43:58,612 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:43:58,612 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:43:58,612 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:43:58,613 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:43:58,613 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:43:58,621 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:43:58,624 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:43:58,625 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:43:58,631 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:43:58,631 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:43:58,631 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:43:58,631 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 03:43:58,633 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:43:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:43:58,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:43:58,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:58,756 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 03:43:58,756 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:43:58,839 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 03:43:58,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:43:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:43:58,841 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:43:58,841 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:58,841 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:43:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:43:58,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:58,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:43:58,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:58,953 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 03:43:58,953 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:43:59,024 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 03:43:59,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:43:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:43:59,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:43:59,025 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:59,026 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:43:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:59,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:43:59,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:59,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:43:59,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:43:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:59,125 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 03:43:59,125 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:43:59,217 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 650 states and 920 transitions. Complement of second has 14 states. [2019-11-28 03:43:59,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 03:43:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:43:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 03:43:59,219 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:43:59,219 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:59,219 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-28 03:43:59,220 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:59,220 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-11-28 03:43:59,220 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:43:59,220 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-11-28 03:43:59,229 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:59,237 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-11-28 03:43:59,238 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-11-28 03:43:59,238 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-11-28 03:43:59,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-11-28 03:43:59,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:59,239 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-11-28 03:43:59,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-11-28 03:43:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-11-28 03:43:59,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-11-28 03:43:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-11-28 03:43:59,260 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-11-28 03:43:59,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:43:59,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 03:43:59,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-11-28 03:43:59,261 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-11-28 03:43:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:43:59,633 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-11-28 03:43:59,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 03:43:59,633 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-11-28 03:43:59,641 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:59,650 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-11-28 03:43:59,650 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-11-28 03:43:59,651 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-11-28 03:43:59,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-11-28 03:43:59,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:43:59,651 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-11-28 03:43:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-11-28 03:43:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-11-28 03:43:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-28 03:43:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-11-28 03:43:59,670 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 03:43:59,671 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 03:43:59,671 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 03:43:59,671 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-11-28 03:43:59,675 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:43:59,675 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:43:59,675 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:43:59,676 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-28 03:43:59,677 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:43:59,677 INFO L794 eck$LassoCheckResult]: Stem: 8597#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 8598#L25 call main_#t~ret2 := fibo(main_~x~0);< 8631#fiboENTRY ~n := #in~n; 8671#L6 assume !(~n < 1); 8669#L8 assume !(1 == ~n); 8666#L11 call #t~ret0 := fibo(~n - 1);< 8667#fiboENTRY ~n := #in~n; 8677#L6 assume !(~n < 1); 8676#L8 assume !(1 == ~n); 8653#L11 call #t~ret0 := fibo(~n - 1);< 8675#fiboENTRY ~n := #in~n; 8679#L6 assume !(~n < 1); 8660#L8 assume !(1 == ~n); 8655#L11 call #t~ret0 := fibo(~n - 1);< 8657#fiboENTRY ~n := #in~n; 8711#L6 assume !(~n < 1); 8708#L8 assume !(1 == ~n); 8649#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8721#L6 assume !(~n < 1); 8710#L8 assume !(1 == ~n); 8648#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8730#L6 assume !(~n < 1); 8796#L8 assume 1 == ~n;#res := 1; 8794#fiboFINAL assume true; 8793#fiboEXIT >#32#return; 8785#L11-1 call #t~ret1 := fibo(~n - 2);< 8792#fiboENTRY ~n := #in~n; 9030#L6 assume !(~n < 1); 9006#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8639#fiboENTRY ~n := #in~n; 8640#L6 assume !(~n < 1); 9118#L8 assume !(1 == ~n); 8633#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 03:43:59,677 INFO L796 eck$LassoCheckResult]: Loop: 8634#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 03:43:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:43:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-11-28 03:43:59,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:43:59,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174512411] [2019-11-28 03:43:59,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:43:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:43:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:43:59,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174512411] [2019-11-28 03:43:59,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184288416] [2019-11-28 03:43:59,985 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:00,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 03:44:00,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:00,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:00,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 03:44:00,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:00,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 24 [2019-11-28 03:44:00,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285703809] [2019-11-28 03:44:00,057 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:00,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-11-28 03:44:00,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:00,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101685050] [2019-11-28 03:44:00,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:00,064 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:00,106 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:00,106 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:00,106 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:00,106 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:00,106 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:00,107 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,107 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:00,107 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:00,107 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2019-11-28 03:44:00,107 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:00,108 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:00,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:00,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:00,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:00,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:00,174 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:00,174 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:00,183 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:00,183 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,193 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:00,193 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,199 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:00,199 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:00,201 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:00,201 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,207 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:00,208 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:00,211 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:00,211 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:00,216 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:00,216 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:00,235 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:00,235 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:05,823 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:05,825 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:05,826 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:05,826 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:05,826 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:05,826 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:05,826 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:05,826 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:05,826 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:05,826 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2019-11-28 03:44:05,826 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:05,827 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:05,827 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 03:44:05,829 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 03:44:05,831 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 03:44:05,834 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 03:44:05,928 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:05,928 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:05,935 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 03:44:05,937 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:05,937 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:05,937 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:05,937 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:05,937 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:05,938 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:05,938 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:05,939 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:05,946 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 03:44:05,947 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:05,947 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:05,947 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:05,947 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:05,948 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:05,948 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:05,948 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:05,949 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:05,956 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 03:44:05,958 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:05,958 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:05,958 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:05,958 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:05,958 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:05,958 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:05,959 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:05,960 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:05,967 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:05,969 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:05,969 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:05,969 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:05,969 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:05,969 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:05,971 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:05,971 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:05,973 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:05,981 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:05,981 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:05,985 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:05,985 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:05,985 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:05,985 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:05,987 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:05,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:06,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:06,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:06,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:06,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:06,106 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:06,106 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 03:44:06,176 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 556 states and 823 transitions. Complement of second has 18 states. [2019-11-28 03:44:06,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:06,178 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 03:44:06,178 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:06,178 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:06,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:06,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:06,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:06,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:06,304 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:06,304 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 03:44:06,426 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 786 states and 1145 transitions. Complement of second has 22 states. [2019-11-28 03:44:06,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:06,428 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 03:44:06,428 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:06,428 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-28 03:44:06,429 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:06,429 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-28 03:44:06,429 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:06,429 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-11-28 03:44:06,443 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:06,465 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-11-28 03:44:06,466 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-11-28 03:44:06,467 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-11-28 03:44:06,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-11-28 03:44:06,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:06,467 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-11-28 03:44:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-11-28 03:44:06,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-11-28 03:44:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-28 03:44:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-11-28 03:44:06,502 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-11-28 03:44:06,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 03:44:06,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2019-11-28 03:44:06,503 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 24 states. [2019-11-28 03:44:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:06,901 INFO L93 Difference]: Finished difference Result 794 states and 1182 transitions. [2019-11-28 03:44:06,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 03:44:06,902 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 794 states and 1182 transitions. [2019-11-28 03:44:06,924 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:06,953 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 794 states to 779 states and 1160 transitions. [2019-11-28 03:44:06,953 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 283 [2019-11-28 03:44:06,954 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 283 [2019-11-28 03:44:06,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 779 states and 1160 transitions. [2019-11-28 03:44:06,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:06,959 INFO L688 BuchiCegarLoop]: Abstraction has 779 states and 1160 transitions. [2019-11-28 03:44:06,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states and 1160 transitions. [2019-11-28 03:44:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 761. [2019-11-28 03:44:06,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-11-28 03:44:07,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1128 transitions. [2019-11-28 03:44:07,002 INFO L711 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 03:44:07,002 INFO L591 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 03:44:07,002 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 03:44:07,003 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 761 states and 1128 transitions. [2019-11-28 03:44:07,012 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:07,012 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:07,012 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:07,018 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:07,018 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:07,020 INFO L794 eck$LassoCheckResult]: Stem: 12464#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 12465#L25 call main_#t~ret2 := fibo(main_~x~0);< 12492#fiboENTRY ~n := #in~n; 12553#L6 assume !(~n < 1); 12554#L8 assume !(1 == ~n); 12548#L11 call #t~ret0 := fibo(~n - 1);< 12549#fiboENTRY ~n := #in~n; 12574#L6 assume !(~n < 1); 12551#L8 assume !(1 == ~n); 12547#L11 call #t~ret0 := fibo(~n - 1);< 12573#fiboENTRY ~n := #in~n; 12571#L6 assume !(~n < 1); 12569#L8 assume !(1 == ~n); 12556#L11 call #t~ret0 := fibo(~n - 1);< 12566#fiboENTRY ~n := #in~n; 12572#L6 assume !(~n < 1); 12570#L8 assume !(1 == ~n); 12561#L11 call #t~ret0 := fibo(~n - 1);< 12568#fiboENTRY ~n := #in~n; 12600#L6 assume !(~n < 1); 12599#L8 assume !(1 == ~n); 12584#L11 call #t~ret0 := fibo(~n - 1);< 12591#fiboENTRY ~n := #in~n; 12630#L6 assume !(~n < 1); 12621#L8 assume !(1 == ~n); 12586#L11 call #t~ret0 := fibo(~n - 1);< 12595#fiboENTRY ~n := #in~n; 12702#L6 assume !(~n < 1); 12693#L8 assume 1 == ~n;#res := 1; 12692#fiboFINAL assume true; 12685#fiboEXIT >#32#return; 12626#L11-1 call #t~ret1 := fibo(~n - 2);< 12628#fiboENTRY ~n := #in~n; 12664#L6 assume ~n < 1;#res := 0; 12659#fiboFINAL assume true; 12625#fiboEXIT >#34#return; 12620#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 12594#fiboFINAL assume true; 12590#fiboEXIT >#32#return; 12585#L11-1 call #t~ret1 := fibo(~n - 2);< 12588#fiboENTRY ~n := #in~n; 12798#L6 assume !(~n < 1); 12796#L8 assume !(1 == ~n); 12792#L11 call #t~ret0 := fibo(~n - 1);< 12793#fiboENTRY ~n := #in~n; 12861#L6 assume !(~n < 1); 12860#L8 assume !(1 == ~n); 12854#L11 call #t~ret0 := fibo(~n - 1);< 12858#fiboENTRY ~n := #in~n; 12892#L6 assume !(~n < 1); 12890#L8 assume !(1 == ~n); 12852#L11 [2019-11-28 03:44:07,020 INFO L796 eck$LassoCheckResult]: Loop: 12852#L11 call #t~ret0 := fibo(~n - 1);< 12858#fiboENTRY ~n := #in~n; 12892#L6 assume !(~n < 1); 12890#L8 assume !(1 == ~n); 12852#L11 [2019-11-28 03:44:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-11-28 03:44:07,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:07,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686233171] [2019-11-28 03:44:07,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:44:07,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686233171] [2019-11-28 03:44:07,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801387299] [2019-11-28 03:44:07,380 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:07,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 03:44:07,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:07,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:44:07,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-28 03:44:07,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:07,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 30 [2019-11-28 03:44:07,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601887476] [2019-11-28 03:44:07,544 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:07,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:07,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-11-28 03:44:07,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:07,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230574563] [2019-11-28 03:44:07,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:07,548 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:07,590 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:07,591 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:07,591 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:07,591 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:07,591 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:07,591 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:07,591 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:07,592 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:07,592 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2019-11-28 03:44:07,592 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:07,592 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:07,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:07,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:07,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:07,605 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:07,658 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:07,659 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:07,666 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:07,666 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:07,677 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:07,677 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:10,500 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:10,502 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:10,502 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:10,502 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:10,502 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:10,502 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:10,502 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,502 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:10,503 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:10,503 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2019-11-28 03:44:10,503 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:10,503 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:10,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:10,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:10,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:10,507 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 03:44:10,566 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:10,566 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,575 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:10,577 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:10,577 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:10,577 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:10,577 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:10,577 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:10,578 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:10,578 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:10,579 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,584 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:10,586 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:10,586 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:10,586 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:10,586 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:10,586 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:10,587 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:10,587 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:10,588 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,593 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 03:44:10,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:10,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:10,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:10,595 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:10,595 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:10,597 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:10,597 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:10,604 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,610 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:10,612 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:10,612 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:10,612 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:10,612 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:10,612 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:10,614 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:10,614 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:10,622 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:10,632 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:10,632 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:10,636 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:10,636 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:10,636 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:10,636 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:10,638 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:10,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:10,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:10,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:10,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:10,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:10,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:10,771 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:10,771 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 03:44:10,830 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380. Second operand 6 states. Result 783 states and 1151 transitions. Complement of second has 18 states. [2019-11-28 03:44:10,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:10,832 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:10,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:10,832 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:10,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:10,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:10,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:10,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:10,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:10,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:10,954 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:10,954 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 03:44:11,056 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380. Second operand 6 states. Result 964 states and 1362 transitions. Complement of second has 22 states. [2019-11-28 03:44:11,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:11,058 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:11,058 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:11,058 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:11,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:11,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:11,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:11,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:11,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:11,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:11,215 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:11,215 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 03:44:11,296 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380. Second operand 6 states. Result 1029 states and 1473 transitions. Complement of second has 27 states. [2019-11-28 03:44:11,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 03:44:11,298 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:11,298 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:11,299 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-28 03:44:11,299 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:11,299 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-11-28 03:44:11,300 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:11,301 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1029 states and 1473 transitions. [2019-11-28 03:44:11,314 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:11,328 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1029 states to 761 states and 1128 transitions. [2019-11-28 03:44:11,328 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 228 [2019-11-28 03:44:11,330 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 264 [2019-11-28 03:44:11,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 761 states and 1128 transitions. [2019-11-28 03:44:11,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:11,331 INFO L688 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 03:44:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states and 1128 transitions. [2019-11-28 03:44:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2019-11-28 03:44:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-11-28 03:44:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1128 transitions. [2019-11-28 03:44:11,360 INFO L711 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 03:44:11,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-28 03:44:11,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2019-11-28 03:44:11,361 INFO L87 Difference]: Start difference. First operand 761 states and 1128 transitions. Second operand 30 states. [2019-11-28 03:44:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:12,047 INFO L93 Difference]: Finished difference Result 395 states and 515 transitions. [2019-11-28 03:44:12,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 03:44:12,048 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 395 states and 515 transitions. [2019-11-28 03:44:12,053 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:12,057 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 395 states to 361 states and 479 transitions. [2019-11-28 03:44:12,058 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2019-11-28 03:44:12,058 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 167 [2019-11-28 03:44:12,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 361 states and 479 transitions. [2019-11-28 03:44:12,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:12,059 INFO L688 BuchiCegarLoop]: Abstraction has 361 states and 479 transitions. [2019-11-28 03:44:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states and 479 transitions. [2019-11-28 03:44:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 317. [2019-11-28 03:44:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-28 03:44:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2019-11-28 03:44:12,068 INFO L711 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 03:44:12,068 INFO L591 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 03:44:12,068 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-28 03:44:12,068 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 317 states and 424 transitions. [2019-11-28 03:44:12,071 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:12,071 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:12,071 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:12,072 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 03:44:12,072 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:12,072 INFO L794 eck$LassoCheckResult]: Stem: 17994#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 17995#L25 call main_#t~ret2 := fibo(main_~x~0);< 18029#fiboENTRY ~n := #in~n; 18120#L6 assume !(~n < 1); 18117#L8 assume !(1 == ~n); 18106#L11 call #t~ret0 := fibo(~n - 1);< 18111#fiboENTRY ~n := #in~n; 18115#L6 assume !(~n < 1); 18113#L8 assume !(1 == ~n); 18108#L11 call #t~ret0 := fibo(~n - 1);< 18109#fiboENTRY ~n := #in~n; 18136#L6 assume !(~n < 1); 18124#L8 assume !(1 == ~n); 18119#L11 call #t~ret0 := fibo(~n - 1);< 18122#fiboENTRY ~n := #in~n; 18147#L6 assume !(~n < 1); 18145#L8 assume !(1 == ~n); 18002#L11 call #t~ret0 := fibo(~n - 1);< 18009#fiboENTRY ~n := #in~n; 18010#L6 assume !(~n < 1); 18001#L8 assume !(1 == ~n); 18003#L11 call #t~ret0 := fibo(~n - 1);< 18139#fiboENTRY ~n := #in~n; 18189#L6 assume !(~n < 1); 18177#L8 assume !(1 == ~n); 18012#L11 call #t~ret0 := fibo(~n - 1);< 18139#fiboENTRY ~n := #in~n; 18189#L6 assume !(~n < 1); 18177#L8 assume !(1 == ~n); 18012#L11 call #t~ret0 := fibo(~n - 1);< 18139#fiboENTRY ~n := #in~n; 18189#L6 assume !(~n < 1); 18177#L8 assume !(1 == ~n); 18012#L11 call #t~ret0 := fibo(~n - 1);< 18171#fiboENTRY ~n := #in~n; 18296#L6 assume !(~n < 1); 18295#L8 assume 1 == ~n;#res := 1; 18294#fiboFINAL assume true; 18293#fiboEXIT >#32#return; 18011#L11-1 call #t~ret1 := fibo(~n - 2);< 18013#fiboENTRY ~n := #in~n; 18243#L6 assume ~n < 1;#res := 0; 18234#fiboFINAL assume true; 18218#fiboEXIT >#34#return; 18204#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 18201#fiboFINAL assume true; 18200#fiboEXIT >#32#return; 18186#L11-1 call #t~ret1 := fibo(~n - 2);< 18188#fiboENTRY ~n := #in~n; 18197#L6 assume !(~n < 1); 18196#L8 assume 1 == ~n;#res := 1; 18179#fiboFINAL assume true; 18185#fiboEXIT >#34#return; 18176#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 18170#fiboFINAL assume true; 18167#fiboEXIT >#32#return; 18131#L11-1 call #t~ret1 := fibo(~n - 2);< 18134#fiboENTRY ~n := #in~n; 18198#L6 assume !(~n < 1); 18178#L8 assume !(1 == ~n); 17985#L11 call #t~ret0 := fibo(~n - 1);< 18093#fiboENTRY ~n := #in~n; 18086#L6 assume !(~n < 1); 18087#L8 assume !(1 == ~n); 18046#L11 call #t~ret0 := fibo(~n - 1);< 18050#fiboENTRY ~n := #in~n; 18071#L6 assume !(~n < 1); 18070#L8 assume !(1 == ~n); 18049#L11 [2019-11-28 03:44:12,073 INFO L796 eck$LassoCheckResult]: Loop: 18049#L11 call #t~ret0 := fibo(~n - 1);< 18050#fiboENTRY ~n := #in~n; 18071#L6 assume !(~n < 1); 18070#L8 assume !(1 == ~n); 18049#L11 [2019-11-28 03:44:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:12,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1455011085, now seen corresponding path program 4 times [2019-11-28 03:44:12,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:12,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133243553] [2019-11-28 03:44:12,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 37 proven. 271 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-28 03:44:12,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133243553] [2019-11-28 03:44:12,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932932442] [2019-11-28 03:44:12,415 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:12,457 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 03:44:12,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:12,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:12,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-28 03:44:12,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:12,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 28 [2019-11-28 03:44:12,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157096490] [2019-11-28 03:44:12,500 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:12,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 5 times [2019-11-28 03:44:12,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:12,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571979501] [2019-11-28 03:44:12,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:12,505 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:12,549 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:12,549 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:12,549 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:12,549 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:12,549 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:12,550 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:12,550 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:12,550 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:12,550 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2019-11-28 03:44:12,550 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:12,550 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:12,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:12,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:12,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:12,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:12,610 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:12,610 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:12,618 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:12,618 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:12,623 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:12,623 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:12,639 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:12,639 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:12,643 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:12,643 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:12,650 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:12,650 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:12,664 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:12,664 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,523 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:15,525 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:15,525 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:15,526 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:15,526 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:15,526 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:15,526 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,526 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:15,526 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:15,526 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2019-11-28 03:44:15,526 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:15,526 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:15,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:15,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:15,531 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:15,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:15,581 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:15,581 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,585 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:15,587 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:15,587 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:15,587 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:15,587 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:15,587 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:15,588 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:15,588 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:15,589 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,594 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:15,596 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:15,596 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:15,596 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:15,597 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:15,597 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:15,597 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:15,597 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:15,598 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,603 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:15,605 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:15,605 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:15,606 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:15,606 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:15,606 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:15,607 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:15,607 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:15,609 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:15,611 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 03:44:15,611 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:15,616 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:15,616 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:15,616 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:15,617 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:15,620 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:15,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:15,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 03:44:15,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:15,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:15,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:15,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:15,776 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:15,776 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 03:44:15,839 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 336 states and 444 transitions. Complement of second has 18 states. [2019-11-28 03:44:15,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:15,840 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 03:44:15,841 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:15,841 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:15,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 03:44:15,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:15,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:15,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:15,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:15,990 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:15,990 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 03:44:16,074 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 342 states and 450 transitions. Complement of second has 17 states. [2019-11-28 03:44:16,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:16,075 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 03:44:16,076 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:16,076 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:16,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:16,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 03:44:16,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:16,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:16,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:16,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:16,209 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:16,209 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 03:44:16,277 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 423 states and 554 transitions. Complement of second has 27 states. [2019-11-28 03:44:16,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 03:44:16,283 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 03:44:16,284 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:16,284 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 03:44:16,285 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:16,285 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 8 letters. [2019-11-28 03:44:16,285 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:16,285 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 423 states and 554 transitions. [2019-11-28 03:44:16,290 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:16,294 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 423 states to 325 states and 434 transitions. [2019-11-28 03:44:16,294 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 122 [2019-11-28 03:44:16,294 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2019-11-28 03:44:16,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 325 states and 434 transitions. [2019-11-28 03:44:16,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:16,294 INFO L688 BuchiCegarLoop]: Abstraction has 325 states and 434 transitions. [2019-11-28 03:44:16,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states and 434 transitions. [2019-11-28 03:44:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2019-11-28 03:44:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-28 03:44:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2019-11-28 03:44:16,303 INFO L711 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 03:44:16,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:16,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-28 03:44:16,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2019-11-28 03:44:16,304 INFO L87 Difference]: Start difference. First operand 317 states and 424 transitions. Second operand 28 states. [2019-11-28 03:44:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:16,935 INFO L93 Difference]: Finished difference Result 412 states and 550 transitions. [2019-11-28 03:44:16,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-28 03:44:16,936 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 412 states and 550 transitions. [2019-11-28 03:44:16,942 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:16,946 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 412 states to 404 states and 536 transitions. [2019-11-28 03:44:16,946 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2019-11-28 03:44:16,946 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 173 [2019-11-28 03:44:16,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 404 states and 536 transitions. [2019-11-28 03:44:16,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:16,946 INFO L688 BuchiCegarLoop]: Abstraction has 404 states and 536 transitions. [2019-11-28 03:44:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states and 536 transitions. [2019-11-28 03:44:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 359. [2019-11-28 03:44:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-11-28 03:44:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 480 transitions. [2019-11-28 03:44:16,956 INFO L711 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 03:44:16,956 INFO L591 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 03:44:16,956 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-11-28 03:44:16,957 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 359 states and 480 transitions. [2019-11-28 03:44:16,959 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:16,959 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:16,959 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:16,960 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 03:44:16,960 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:16,961 INFO L794 eck$LassoCheckResult]: Stem: 21207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 21208#L25 call main_#t~ret2 := fibo(main_~x~0);< 21235#fiboENTRY ~n := #in~n; 21343#L6 assume !(~n < 1); 21341#L8 assume !(1 == ~n); 21334#L11 call #t~ret0 := fibo(~n - 1);< 21338#fiboENTRY ~n := #in~n; 21342#L6 assume !(~n < 1); 21339#L8 assume !(1 == ~n); 21318#L11 call #t~ret0 := fibo(~n - 1);< 21336#fiboENTRY ~n := #in~n; 21499#L6 assume !(~n < 1); 21495#L8 assume !(1 == ~n); 21321#L11 call #t~ret0 := fibo(~n - 1);< 21323#fiboENTRY ~n := #in~n; 21364#L6 assume !(~n < 1); 21361#L8 assume !(1 == ~n); 21348#L11 call #t~ret0 := fibo(~n - 1);< 21357#fiboENTRY ~n := #in~n; 21411#L6 assume !(~n < 1); 21401#L8 assume !(1 == ~n); 21394#L11 call #t~ret0 := fibo(~n - 1);< 21397#fiboENTRY ~n := #in~n; 21424#L6 assume !(~n < 1); 21417#L8 assume !(1 == ~n); 21226#L11 call #t~ret0 := fibo(~n - 1);< 21414#fiboENTRY ~n := #in~n; 21434#L6 assume !(~n < 1); 21433#L8 assume !(1 == ~n); 21225#L11 call #t~ret0 := fibo(~n - 1);< 21414#fiboENTRY ~n := #in~n; 21434#L6 assume !(~n < 1); 21433#L8 assume !(1 == ~n); 21225#L11 call #t~ret0 := fibo(~n - 1);< 21414#fiboENTRY ~n := #in~n; 21434#L6 assume !(~n < 1); 21433#L8 assume !(1 == ~n); 21225#L11 call #t~ret0 := fibo(~n - 1);< 21419#fiboENTRY ~n := #in~n; 21551#L6 assume !(~n < 1); 21550#L8 assume 1 == ~n;#res := 1; 21549#fiboFINAL assume true; 21548#fiboEXIT >#32#return; 21224#L11-1 call #t~ret1 := fibo(~n - 2);< 21227#fiboENTRY ~n := #in~n; 21535#L6 assume ~n < 1;#res := 0; 21534#fiboFINAL assume true; 21533#fiboEXIT >#34#return; 21531#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 21529#fiboFINAL assume true; 21528#fiboEXIT >#32#return; 21239#L11-1 call #t~ret1 := fibo(~n - 2);< 21525#fiboENTRY ~n := #in~n; 21546#L6 assume !(~n < 1); 21544#L8 assume 1 == ~n;#res := 1; 21422#fiboFINAL assume true; 21522#fiboEXIT >#34#return; 21521#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 21460#fiboFINAL assume true; 21403#fiboEXIT >#32#return; 21237#L11-1 call #t~ret1 := fibo(~n - 2);< 21409#fiboENTRY ~n := #in~n; 21541#L6 assume !(~n < 1); 21421#L8 assume !(1 == ~n); 21243#L11 call #t~ret0 := fibo(~n - 1);< 21306#fiboENTRY ~n := #in~n; 21299#L6 assume !(~n < 1); 21300#L8 assume !(1 == ~n); 21260#L11 call #t~ret0 := fibo(~n - 1);< 21262#fiboENTRY ~n := #in~n; 21284#L6 assume !(~n < 1); 21280#L8 assume !(1 == ~n); 21261#L11 [2019-11-28 03:44:16,961 INFO L796 eck$LassoCheckResult]: Loop: 21261#L11 call #t~ret0 := fibo(~n - 1);< 21262#fiboENTRY ~n := #in~n; 21284#L6 assume !(~n < 1); 21280#L8 assume !(1 == ~n); 21261#L11 [2019-11-28 03:44:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:16,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1736707112, now seen corresponding path program 5 times [2019-11-28 03:44:16,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:16,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525627202] [2019-11-28 03:44:16,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 218 proven. 112 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-28 03:44:17,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525627202] [2019-11-28 03:44:17,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138552868] [2019-11-28 03:44:17,340 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:17,392 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-28 03:44:17,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:17,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 03:44:17,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 179 proven. 18 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-28 03:44:17,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:17,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 25 [2019-11-28 03:44:17,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136362527] [2019-11-28 03:44:17,502 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:17,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 6 times [2019-11-28 03:44:17,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:17,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907175692] [2019-11-28 03:44:17,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:17,512 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:17,558 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:17,558 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:17,558 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:17,558 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:17,559 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:17,559 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,559 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:17,559 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:17,559 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2019-11-28 03:44:17,559 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:17,559 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:17,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:17,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:17,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:17,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:17,624 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:17,624 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,629 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:17,629 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:17,632 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:17,633 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,637 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:17,637 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:17,640 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:17,640 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,645 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:17,645 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:17,649 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:17,649 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,654 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:17,654 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:17,669 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:17,669 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:28,515 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:28,518 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:28,518 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:28,518 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:28,518 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:28,518 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:28,519 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,519 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:28,519 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:28,519 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2019-11-28 03:44:28,519 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:28,519 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:28,520 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,522 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,574 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:28,575 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,580 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:28,581 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:28,581 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:28,581 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:28,581 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:28,581 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:28,582 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:28,582 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:28,583 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,587 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:28,588 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:28,588 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:28,589 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:28,589 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:28,589 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:28,589 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:28,589 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:28,591 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,596 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:28,598 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:28,598 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:28,598 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:28,598 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:28,598 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:28,599 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:28,599 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:28,601 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:28,604 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:28,604 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,608 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:28,608 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:28,608 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:28,608 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:28,610 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,755 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 03:44:28,755 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:28,756 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 03:44:28,818 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 381 states and 503 transitions. Complement of second has 18 states. [2019-11-28 03:44:28,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:28,819 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 03:44:28,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:28,820 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,929 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,932 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,976 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 03:44:28,976 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:28,976 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 03:44:29,058 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 387 states and 509 transitions. Complement of second has 17 states. [2019-11-28 03:44:29,059 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 03:44:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:29,059 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 03:44:29,060 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,060 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:29,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 03:44:29,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:29,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:29,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:29,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:29,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:29,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:29,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:29,216 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:29,216 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 03:44:29,284 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 490 states and 640 transitions. Complement of second has 27 states. [2019-11-28 03:44:29,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 03:44:29,285 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 03:44:29,286 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,286 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 76 letters. Loop has 4 letters. [2019-11-28 03:44:29,287 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,287 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 8 letters. [2019-11-28 03:44:29,287 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,288 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 490 states and 640 transitions. [2019-11-28 03:44:29,292 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 03:44:29,297 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 490 states to 371 states and 494 transitions. [2019-11-28 03:44:29,297 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 127 [2019-11-28 03:44:29,298 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2019-11-28 03:44:29,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 371 states and 494 transitions. [2019-11-28 03:44:29,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:29,299 INFO L688 BuchiCegarLoop]: Abstraction has 371 states and 494 transitions. [2019-11-28 03:44:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states and 494 transitions. [2019-11-28 03:44:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 359. [2019-11-28 03:44:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-11-28 03:44:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 480 transitions. [2019-11-28 03:44:29,311 INFO L711 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 03:44:29,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:29,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-28 03:44:29,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2019-11-28 03:44:29,313 INFO L87 Difference]: Start difference. First operand 359 states and 480 transitions. Second operand 25 states. [2019-11-28 03:44:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:29,884 INFO L93 Difference]: Finished difference Result 495 states and 691 transitions. [2019-11-28 03:44:29,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-28 03:44:29,884 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 691 transitions. [2019-11-28 03:44:29,889 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:29,889 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 0 states and 0 transitions. [2019-11-28 03:44:29,890 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 03:44:29,890 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 03:44:29,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 03:44:29,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 03:44:29,890 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:29,890 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:29,891 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:29,891 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-11-28 03:44:29,891 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 03:44:29,891 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:29,891 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 03:44:29,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:44:29 BoogieIcfgContainer [2019-11-28 03:44:29,899 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 03:44:29,899 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 03:44:29,900 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 03:44:29,900 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 03:44:29,901 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:43:50" (3/4) ... [2019-11-28 03:44:29,905 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 03:44:29,905 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 03:44:29,907 INFO L168 Benchmark]: Toolchain (without parser) took 39892.09 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 382.2 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -114.4 MB). Peak memory consumption was 267.8 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,908 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:29,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.68 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.76 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:29,910 INFO L168 Benchmark]: Boogie Preprocessor took 108.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -193.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,910 INFO L168 Benchmark]: RCFGBuilder took 256.63 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: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,911 INFO L168 Benchmark]: BuchiAutomizer took 39193.25 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 234.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 47.2 MB). Peak memory consumption was 281.6 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:29,911 INFO L168 Benchmark]: Witness Printer took 5.66 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:29,914 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 283.68 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 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 38.76 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 108.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -193.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 256.63 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: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 39193.25 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 234.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 47.2 MB). Peak memory consumption was 281.6 MB. Max. memory is 11.5 GB. * Witness Printer took 5.66 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 17 terminating modules (9 trivial, 3 deterministic, 5 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 9 modules have a trivial ranking function, the largest among these consists of 30 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 39.1s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 29.7s. Construction of modules took 2.6s. Büchi inclusion checks took 5.8s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 16. Automata minimization 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 402 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 761 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 5, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 350 SDtfs, 971 SDslu, 849 SDs, 0 SdLazy, 2854 SolverSat, 701 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf97 lsp96 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp77 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 30ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 23.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...