./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_10-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd317ac0ecdb37853dacea373914a521115465e0 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 21:16:18,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 21:16:18,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 21:16:18,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 21:16:18,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 21:16:18,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 21:16:18,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 21:16:18,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 21:16:18,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 21:16:18,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 21:16:18,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 21:16:18,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 21:16:18,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 21:16:18,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 21:16:18,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 21:16:18,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 21:16:18,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 21:16:18,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 21:16:18,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 21:16:18,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 21:16:18,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 21:16:18,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 21:16:18,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 21:16:18,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 21:16:18,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 21:16:18,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 21:16:18,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 21:16:18,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 21:16:18,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 21:16:18,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 21:16:18,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 21:16:18,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 21:16:18,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 21:16:18,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 21:16:18,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 21:16:18,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 21:16:18,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 21:16:18,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 21:16:18,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 21:16:18,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 21:16:18,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 21:16:18,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 21:16:18,923 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 21:16:18,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 21:16:18,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 21:16:18,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 21:16:18,931 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 21:16:18,931 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 21:16:18,931 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 21:16:18,932 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 21:16:18,933 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 21:16:18,933 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 21:16:18,933 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 21:16:18,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 21:16:18,935 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 21:16:18,935 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 21:16:18,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 21:16:18,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 21:16:18,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 21:16:18,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 21:16:18,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 21:16:18,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 21:16:18,937 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 21:16:18,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 21:16:18,938 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 21:16:18,938 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 21:16:18,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 21:16:18,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 21:16:18,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 21:16:18,939 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 21:16:18,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 21:16:18,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 21:16:18,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 21:16:18,941 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 21:16:18,942 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 21:16:18,942 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd317ac0ecdb37853dacea373914a521115465e0 [2019-11-28 21:16:19,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 21:16:19,256 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 21:16:19,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 21:16:19,262 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 21:16:19,263 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 21:16:19,263 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-2.c [2019-11-28 21:16:19,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aaed63cb/75444ee25a744eacbf9bccd8a4cc48a7/FLAGb661f1e55 [2019-11-28 21:16:19,807 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 21:16:19,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2019-11-28 21:16:19,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aaed63cb/75444ee25a744eacbf9bccd8a4cc48a7/FLAGb661f1e55 [2019-11-28 21:16:20,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aaed63cb/75444ee25a744eacbf9bccd8a4cc48a7 [2019-11-28 21:16:20,196 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 21:16:20,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 21:16:20,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:20,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 21:16:20,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 21:16:20,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0c65a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20, skipping insertion in model container [2019-11-28 21:16:20,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 21:16:20,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 21:16:20,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:20,452 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 21:16:20,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:20,489 INFO L208 MainTranslator]: Completed translation [2019-11-28 21:16:20,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20 WrapperNode [2019-11-28 21:16:20,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:20,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:20,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 21:16:20,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 21:16:20,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:20,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 21:16:20,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 21:16:20,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 21:16:20,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (1/1) ... [2019-11-28 21:16:20,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 21:16:20,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 21:16:20,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 21:16:20,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 21:16:20,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (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 21:16:20,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 21:16:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 21:16:20,655 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 21:16:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 21:16:20,817 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 21:16:20,817 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 21:16:20,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:20 BoogieIcfgContainer [2019-11-28 21:16:20,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 21:16:20,820 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 21:16:20,820 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 21:16:20,823 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 21:16:20,824 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:20,825 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 09:16:20" (1/3) ... [2019-11-28 21:16:20,826 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@490ec91a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:20, skipping insertion in model container [2019-11-28 21:16:20,826 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:20,826 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:20" (2/3) ... [2019-11-28 21:16:20,827 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@490ec91a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:20, skipping insertion in model container [2019-11-28 21:16:20,827 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:20,827 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:20" (3/3) ... [2019-11-28 21:16:20,829 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_10-2.c [2019-11-28 21:16:20,881 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 21:16:20,882 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 21:16:20,882 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 21:16:20,882 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 21:16:20,882 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 21:16:20,883 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 21:16:20,883 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 21:16:20,883 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 21:16:20,900 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:20,941 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:20,942 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:20,942 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:20,961 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:20,968 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:20,968 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 21:16:20,968 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:20,971 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:20,971 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:20,971 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:20,972 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:20,972 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:20,982 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 21:16:20,982 INFO L796 eck$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 21:16:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 21:16:21,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:21,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500778411] [2019-11-28 21:16:21,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:21,102 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 21:16:21,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:21,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224260264] [2019-11-28 21:16:21,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:21,126 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:21,131 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 21:16:21,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:21,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936242766] [2019-11-28 21:16:21,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:21,148 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:21,275 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:21,276 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:21,276 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:21,276 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:21,277 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:21,277 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,277 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:21,277 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:21,277 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2019-11-28 21:16:21,277 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:21,278 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:21,297 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 21:16:21,310 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 21:16:21,315 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 21:16:21,318 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 21:16:21,321 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 21:16:21,413 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:21,414 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:21,422 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:21,422 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,433 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:21,434 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:21,446 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:21,446 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,452 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:21,453 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) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,466 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:21,466 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:21,469 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:21,469 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 21:16:21,478 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:21,478 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:21,482 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:21,482 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 21:16:21,494 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:21,495 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,509 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:21,509 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:21,518 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:21,520 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:21,520 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:21,520 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:21,520 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:21,521 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:21,522 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,522 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:21,522 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:21,522 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2019-11-28 21:16:21,523 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:21,523 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:21,525 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 21:16:21,538 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 21:16:21,545 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 21:16:21,548 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 21:16:21,552 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 21:16:21,609 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:21,615 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 21:16:21,622 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 21:16:21,625 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:21,626 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:21,626 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:21,627 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:21,627 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:21,630 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:21,630 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,634 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,646 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 21:16:21,649 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:21,649 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:21,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:21,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:21,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:21,653 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:21,653 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:21,658 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 21:16:21,681 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 21:16:21,684 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:21,684 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:21,684 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:21,684 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:21,685 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:21,687 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:21,687 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,690 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 21:16:21,707 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,709 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:21,710 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:21,710 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:21,710 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:21,710 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:21,712 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:21,713 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:21,717 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 21:16:21,729 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 21:16:21,731 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:21,731 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:21,732 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:21,732 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:21,732 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:21,734 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:21,734 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,741 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:21,760 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:21,760 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:21,770 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:21,770 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:21,771 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:21,771 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 21:16:21,776 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 21:16:21,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:21,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:21,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:21,905 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 21:16:21,924 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 21:16:21,926 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 21:16:22,053 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 21:16:22,054 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 21:16:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 21:16:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 21:16:22,060 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 21:16:22,062 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:22,062 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 21:16:22,063 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:22,063 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 21:16:22,063 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:22,065 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 21:16:22,070 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:22,078 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 21:16:22,080 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 21:16:22,080 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 21:16:22,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 21:16:22,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:22,083 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 21:16:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 21:16:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 21:16:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 21:16:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 21:16:22,119 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:22,119 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:22,119 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 21:16:22,119 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 21:16:22,121 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:22,121 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:22,121 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:22,123 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:22,123 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:22,123 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 21:16:22,124 INFO L796 eck$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 21:16:22,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 21:16:22,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:22,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293804668] [2019-11-28 21:16:22,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:22,239 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 21:16:22,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293804668] [2019-11-28 21:16:22,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078773955] [2019-11-28 21:16:22,241 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) [2019-11-28 21:16:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:22,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:22,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:22,293 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 21:16:22,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:22,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:22,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146422470] [2019-11-28 21:16:22,300 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 21:16:22,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:22,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497020694] [2019-11-28 21:16:22,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 21:16:22,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497020694] [2019-11-28 21:16:22,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 21:16:22,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 21:16:22,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986935942] [2019-11-28 21:16:22,392 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:22,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:22,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 21:16:22,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 21:16:22,400 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 21:16:22,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:22,510 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 21:16:22,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 21:16:22,512 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 21:16:22,514 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:22,517 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 21:16:22,522 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 21:16:22,522 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 21:16:22,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 21:16:22,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:22,524 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 21:16:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 21:16:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 21:16:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 21:16:22,534 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:22,535 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:22,535 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 21:16:22,535 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 21:16:22,538 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:22,539 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:22,539 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:22,540 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:22,540 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:22,541 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 21:16:22,541 INFO L796 eck$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 21:16:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 21:16:22,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:22,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145920766] [2019-11-28 21:16:22,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:22,630 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 21:16:22,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145920766] [2019-11-28 21:16:22,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160116629] [2019-11-28 21:16:22,632 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 21:16:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:22,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:22,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:22,687 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 21:16:22,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:22,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:22,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409133507] [2019-11-28 21:16:22,693 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:22,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 21:16:22,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:22,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339230903] [2019-11-28 21:16:22,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:22,707 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:22,832 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:22,832 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:22,832 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:22,832 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:22,832 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:22,833 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:22,833 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:22,833 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:22,833 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2019-11-28 21:16:22,833 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:22,833 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:22,835 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 21:16:22,851 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 21:16:22,857 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 21:16:22,859 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 21:16:22,909 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:22,909 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) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:22,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:22,917 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:22,932 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:22,933 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:23,338 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:23,341 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:23,341 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:23,341 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:23,341 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:23,341 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:23,341 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:23,342 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:23,342 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:23,342 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2019-11-28 21:16:23,342 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:23,342 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:23,344 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 21:16:23,353 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 21:16:23,361 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:23,363 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 21:16:23,403 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:23,404 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 21:16:23,420 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 21:16:23,425 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:23,426 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:23,426 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:23,426 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:23,426 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:23,427 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:23,427 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:23,431 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) [2019-11-28 21:16:23,449 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 21:16:23,451 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:23,451 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:23,451 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:23,452 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:23,452 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:23,455 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:23,455 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:23,459 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:23,463 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:23,463 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 21:16:23,471 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:23,471 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:23,472 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:23,472 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:23,475 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:23,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:23,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 21:16:23,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:23,640 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 21:16:23,641 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 21:16:23,641 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:23,878 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 21:16:23,879 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 21:16:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 21:16:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 21:16:23,880 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 21:16:23,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:23,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 21:16:23,882 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:23,882 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 21:16:23,883 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:23,883 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 21:16:23,890 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:23,897 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 21:16:23,898 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 21:16:23,898 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:23,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 21:16:23,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:23,899 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 21:16:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 21:16:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 21:16:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 21:16:23,917 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 21:16:23,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:23,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 21:16:23,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 21:16:23,919 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-28 21:16:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:24,058 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 21:16:24,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 21:16:24,061 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 21:16:24,069 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:24,077 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 21:16:24,077 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 21:16:24,078 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:24,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 21:16:24,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:24,078 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 21:16:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 21:16:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 21:16:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 21:16:24,097 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:24,098 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:24,098 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 21:16:24,098 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-28 21:16:24,100 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:24,100 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:24,100 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:24,102 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:24,102 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 21:16:24,103 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 21:16:24,103 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 21:16:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 21:16:24,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:24,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764794149] [2019-11-28 21:16:24,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,214 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 21:16:24,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764794149] [2019-11-28 21:16:24,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017609764] [2019-11-28 21:16:24,215 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 21:16:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 21:16:24,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:24,297 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 21:16:24,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:24,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 21:16:24,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590570754] [2019-11-28 21:16:24,299 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 21:16:24,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:24,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469662596] [2019-11-28 21:16:24,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,471 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 21:16:24,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469662596] [2019-11-28 21:16:24,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887019314] [2019-11-28 21:16:24,473 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 21:16:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:24,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:24,564 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 21:16:24,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:24,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 21:16:24,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085115349] [2019-11-28 21:16:24,566 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:24,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:24,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 21:16:24,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 21:16:24,569 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 21:16:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:24,827 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-28 21:16:24,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 21:16:24,827 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-28 21:16:24,835 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:24,842 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-28 21:16:24,845 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 21:16:24,845 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 21:16:24,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-28 21:16:24,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:24,848 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-28 21:16:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 21:16:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 21:16:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-28 21:16:24,870 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:24,870 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:24,870 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 21:16:24,873 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-28 21:16:24,875 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:24,878 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:24,878 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:24,880 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:24,882 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 21:16:24,883 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 21:16:24,883 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 21:16:24,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:24,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 21:16:24,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:24,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146226910] [2019-11-28 21:16:24,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:25,080 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 21:16:25,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146226910] [2019-11-28 21:16:25,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662891171] [2019-11-28 21:16:25,081 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 21:16:25,115 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 21:16:25,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:25,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:25,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:25,148 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 21:16:25,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:25,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-28 21:16:25,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606885685] [2019-11-28 21:16:25,149 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 21:16:25,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:25,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626927134] [2019-11-28 21:16:25,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:25,161 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:25,447 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:25,447 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:25,447 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:25,447 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:25,447 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:25,447 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:25,447 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:25,447 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:25,447 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2019-11-28 21:16:25,448 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:25,448 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:25,449 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 21:16:25,451 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 21:16:25,453 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 21:16:25,457 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 21:16:25,542 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:25,542 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 21:16:25,552 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:25,552 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:25,555 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:25,555 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 21:16:25,562 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:25,562 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:25,565 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:25,565 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:25,580 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:25,580 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 21:16:25,584 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:25,584 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 21:16:25,592 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:25,592 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 21:16:25,605 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:25,605 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 21:16:26,147 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:26,149 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:26,149 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:26,149 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:26,150 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:26,150 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:26,150 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:26,150 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:26,150 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:26,150 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2019-11-28 21:16:26,150 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:26,150 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:26,151 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 21:16:26,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:26,159 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 21:16:26,172 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 21:16:26,253 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:26,253 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 21:16:26,262 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 21:16:26,264 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:26,264 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:26,265 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:26,265 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:26,265 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:26,266 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:26,266 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:26,268 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) [2019-11-28 21:16:26,284 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 21:16:26,286 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:26,286 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:26,286 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:26,286 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:26,287 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:26,287 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:26,287 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:26,289 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:26,295 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 21:16:26,297 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:26,297 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:26,297 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:26,297 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:26,297 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:26,301 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:26,301 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:26,308 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:26,311 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 21:16:26,311 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 21:16:26,316 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:26,316 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:26,316 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:26,316 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:26,321 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:26,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:26,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:26,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:26,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:26,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:26,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:26,531 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 21:16:26,531 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 21:16:26,532 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:26,753 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 21:16:26,754 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 21:16:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 21:16:26,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:26,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:26,756 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:26,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:26,805 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:26,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:26,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:26,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:26,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:26,942 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 21:16:26,942 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 21:16:26,943 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:27,149 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 21:16:27,150 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 21:16:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 21:16:27,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:27,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:27,151 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:27,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:27,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:27,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:27,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:27,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:27,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:27,359 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 21:16:27,359 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 21:16:27,360 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:27,637 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 21:16:27,637 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 21:16:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 21:16:27,638 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:27,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:27,639 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 21:16:27,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:27,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 21:16:27,643 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:27,643 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-11-28 21:16:27,667 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 21:16:27,685 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-11-28 21:16:27,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 21:16:27,686 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 21:16:27,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-11-28 21:16:27,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:27,688 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-11-28 21:16:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-11-28 21:16:27,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-11-28 21:16:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-28 21:16:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-11-28 21:16:27,738 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-11-28 21:16:27,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:27,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 21:16:27,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 21:16:27,739 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-11-28 21:16:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:28,024 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-11-28 21:16:28,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 21:16:28,025 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-11-28 21:16:28,035 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:28,046 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-11-28 21:16:28,046 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-11-28 21:16:28,047 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-11-28 21:16:28,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-11-28 21:16:28,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:28,048 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-11-28 21:16:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-11-28 21:16:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-11-28 21:16:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-28 21:16:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-28 21:16:28,085 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 21:16:28,085 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 21:16:28,085 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 21:16:28,085 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-11-28 21:16:28,090 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:28,090 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:28,090 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:28,093 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:28,093 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:28,093 INFO L794 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4845#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4953#fiboEXIT >#32#return; 4933#L11-1 call #t~ret1 := fibo(~n - 2);< 4941#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4957#L8 assume !(1 == ~n); 4958#L11 call #t~ret0 := fibo(~n - 1);< 4967#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 21:16:28,093 INFO L796 eck$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 21:16:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-11-28 21:16:28,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:28,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353522388] [2019-11-28 21:16:28,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,305 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 21:16:28,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353522388] [2019-11-28 21:16:28,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215064681] [2019-11-28 21:16:28,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,355 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 21:16:28,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:28,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-11-28 21:16:28,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909090018] [2019-11-28 21:16:28,357 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 21:16:28,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:28,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223415736] [2019-11-28 21:16:28,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:28,361 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:28,390 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:28,390 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:28,390 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:28,390 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:28,390 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:28,390 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,390 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:28,390 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:28,391 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2019-11-28 21:16:28,391 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:28,391 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:28,392 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 21:16:28,393 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 21:16:28,395 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 21:16:28,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:28,403 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 21:16:28,439 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:28,440 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) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:28,445 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:28,453 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:28,453 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,459 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:28,459 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:28,461 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:28,461 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,467 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:28,467 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:28,472 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:28,472 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 21:16:28,478 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:28,478 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 21:16:28,488 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:28,488 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:28,530 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:28,532 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:28,532 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:28,532 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:28,533 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:28,533 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:28,533 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,533 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:28,533 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:28,533 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2019-11-28 21:16:28,534 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:28,534 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:28,535 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 21:16:28,536 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 21:16:28,538 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 21:16:28,541 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 21:16:28,548 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 21:16:28,597 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:28,597 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,605 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 21:16:28,607 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:28,607 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:28,607 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:28,607 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:28,607 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:28,608 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:28,608 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:28,614 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 21:16:28,622 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 21:16:28,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:28,624 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:28,624 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:28,624 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:28,624 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:28,625 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:28,625 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:28,626 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 21:16:28,634 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 21:16:28,635 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:28,636 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:28,636 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:28,636 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:28,636 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:28,636 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:28,636 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:28,638 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 21:16:28,643 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 21:16:28,644 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:28,645 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:28,645 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:28,645 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:28,645 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:28,646 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:28,646 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:28,655 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:28,658 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:28,659 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 21:16:28,664 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:28,664 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:28,664 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:28,665 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:28,667 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,745 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,746 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,761 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 21:16:28,762 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 21:16:28,762 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:28,840 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 21:16:28,841 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 21:16:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:28,842 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:28,842 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:28,842 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:28,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:28,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:28,958 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 21:16:28,959 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 21:16:28,959 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:29,023 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 21:16:29,024 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 21:16:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:29,024 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:29,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:29,025 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:29,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:29,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:29,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:29,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:29,129 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 21:16:29,129 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 21:16:29,129 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:29,223 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 21:16:29,224 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 21:16:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 21:16:29,225 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:29,225 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:29,225 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-28 21:16:29,226 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:29,226 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-11-28 21:16:29,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:29,227 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-11-28 21:16:29,236 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:29,246 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-11-28 21:16:29,246 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-11-28 21:16:29,246 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-11-28 21:16:29,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-11-28 21:16:29,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:29,248 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-11-28 21:16:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-11-28 21:16:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-11-28 21:16:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-11-28 21:16:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-11-28 21:16:29,267 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-11-28 21:16:29,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:29,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 21:16:29,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-11-28 21:16:29,268 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-11-28 21:16:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:29,616 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-11-28 21:16:29,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 21:16:29,617 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-11-28 21:16:29,625 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:29,633 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-11-28 21:16:29,634 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-11-28 21:16:29,635 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-11-28 21:16:29,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-11-28 21:16:29,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:29,635 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-11-28 21:16:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-11-28 21:16:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-11-28 21:16:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-28 21:16:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-11-28 21:16:29,655 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 21:16:29,655 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 21:16:29,655 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 21:16:29,655 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-11-28 21:16:29,659 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:29,660 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:29,660 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:29,661 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:29,661 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:29,662 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 21:16:29,662 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 21:16:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:29,663 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-11-28 21:16:29,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:29,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793998143] [2019-11-28 21:16:29,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:29,950 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 21:16:29,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793998143] [2019-11-28 21:16:29,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295777965] [2019-11-28 21:16:29,953 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 21:16:29,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 21:16:29,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:29,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:29,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:30,010 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 21:16:30,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:30,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 24 [2019-11-28 21:16:30,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587650210] [2019-11-28 21:16:30,012 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:30,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-11-28 21:16:30,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:30,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052214329] [2019-11-28 21:16:30,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:30,019 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:30,064 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:30,064 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:30,065 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:30,065 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:30,065 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:30,065 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:30,065 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:30,066 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:30,066 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2019-11-28 21:16:30,066 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:30,066 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:30,067 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 21:16:30,069 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 21:16:30,070 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 21:16:30,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:30,158 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:30,158 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:30,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:30,164 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:30,167 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:30,168 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 21:16:30,175 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:30,176 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:30,179 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:30,179 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 21:16:30,186 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:30,186 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:30,189 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:30,190 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 21:16:30,201 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:30,201 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:30,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:30,213 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:35,907 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:35,909 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:35,909 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:35,909 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:35,909 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:35,909 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:35,909 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:35,909 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:35,910 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:35,910 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2019-11-28 21:16:35,910 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:35,910 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:35,910 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 21:16:35,912 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 21:16:35,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:35,915 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 21:16:35,976 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:35,976 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 21:16:35,982 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 21:16:35,984 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:35,984 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:35,984 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:35,984 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:35,984 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:35,984 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:35,985 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:35,986 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 21:16:35,993 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 21:16:35,994 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:35,994 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:35,994 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:35,994 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:35,994 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:35,995 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:35,995 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:35,996 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 21:16:36,003 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 21:16:36,004 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:36,004 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:36,005 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:36,005 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:36,005 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:36,005 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:36,005 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:36,006 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:36,012 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 21:16:36,013 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:36,013 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:36,013 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:36,013 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:36,013 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:36,015 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:36,015 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:36,017 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:36,020 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:36,020 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 21:16:36,024 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:36,024 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:36,024 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:36,024 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:36,026 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:36,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:16:36,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:36,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:36,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:36,160 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 21:16:36,160 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 21:16:36,160 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 21:16:36,217 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 21:16:36,218 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 21:16:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:16:36,219 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 21:16:36,219 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:36,219 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:36,276 INFO L264 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:16:36,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:36,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:36,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:36,350 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 21:16:36,351 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 21:16:36,351 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 21:16:36,460 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 21:16:36,460 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 21:16:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:16:36,461 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 21:16:36,462 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:36,462 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-28 21:16:36,462 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:36,462 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-28 21:16:36,463 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:36,463 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-11-28 21:16:36,473 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:36,485 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-11-28 21:16:36,486 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-11-28 21:16:36,487 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-11-28 21:16:36,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-11-28 21:16:36,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:36,488 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-11-28 21:16:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-11-28 21:16:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-11-28 21:16:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-28 21:16:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-11-28 21:16:36,513 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-11-28 21:16:36,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:36,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 21:16:36,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2019-11-28 21:16:36,514 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 24 states. [2019-11-28 21:16:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:36,927 INFO L93 Difference]: Finished difference Result 794 states and 1182 transitions. [2019-11-28 21:16:36,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 21:16:36,927 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 794 states and 1182 transitions. [2019-11-28 21:16:36,938 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:36,950 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 794 states to 779 states and 1160 transitions. [2019-11-28 21:16:36,950 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 283 [2019-11-28 21:16:36,951 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 283 [2019-11-28 21:16:36,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 779 states and 1160 transitions. [2019-11-28 21:16:36,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:36,952 INFO L688 BuchiCegarLoop]: Abstraction has 779 states and 1160 transitions. [2019-11-28 21:16:36,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states and 1160 transitions. [2019-11-28 21:16:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 761. [2019-11-28 21:16:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-11-28 21:16:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1128 transitions. [2019-11-28 21:16:36,977 INFO L711 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 21:16:36,977 INFO L591 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 21:16:36,978 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 21:16:36,978 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 761 states and 1128 transitions. [2019-11-28 21:16:36,983 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:36,983 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:36,984 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:36,985 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:36,985 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:36,985 INFO L794 eck$LassoCheckResult]: Stem: 12464#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 12465#L25 call main_#t~ret2 := fibo(main_~x~0);< 12492#fiboENTRY ~n := #in~n; 12553#L6 assume !(~n < 1); 12554#L8 assume !(1 == ~n); 12548#L11 call #t~ret0 := fibo(~n - 1);< 12549#fiboENTRY ~n := #in~n; 12574#L6 assume !(~n < 1); 12551#L8 assume !(1 == ~n); 12547#L11 call #t~ret0 := fibo(~n - 1);< 12573#fiboENTRY ~n := #in~n; 12571#L6 assume !(~n < 1); 12569#L8 assume !(1 == ~n); 12556#L11 call #t~ret0 := fibo(~n - 1);< 12566#fiboENTRY ~n := #in~n; 12572#L6 assume !(~n < 1); 12570#L8 assume !(1 == ~n); 12561#L11 call #t~ret0 := fibo(~n - 1);< 12568#fiboENTRY ~n := #in~n; 12600#L6 assume !(~n < 1); 12599#L8 assume !(1 == ~n); 12584#L11 call #t~ret0 := fibo(~n - 1);< 12591#fiboENTRY ~n := #in~n; 12630#L6 assume !(~n < 1); 12621#L8 assume !(1 == ~n); 12586#L11 call #t~ret0 := fibo(~n - 1);< 12595#fiboENTRY ~n := #in~n; 12702#L6 assume !(~n < 1); 12693#L8 assume 1 == ~n;#res := 1; 12692#fiboFINAL assume true; 12685#fiboEXIT >#32#return; 12626#L11-1 call #t~ret1 := fibo(~n - 2);< 12628#fiboENTRY ~n := #in~n; 12664#L6 assume ~n < 1;#res := 0; 12659#fiboFINAL assume true; 12625#fiboEXIT >#34#return; 12620#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 12594#fiboFINAL assume true; 12590#fiboEXIT >#32#return; 12585#L11-1 call #t~ret1 := fibo(~n - 2);< 12588#fiboENTRY ~n := #in~n; 12798#L6 assume !(~n < 1); 12796#L8 assume !(1 == ~n); 12792#L11 call #t~ret0 := fibo(~n - 1);< 12793#fiboENTRY ~n := #in~n; 12861#L6 assume !(~n < 1); 12860#L8 assume !(1 == ~n); 12854#L11 call #t~ret0 := fibo(~n - 1);< 12858#fiboENTRY ~n := #in~n; 12892#L6 assume !(~n < 1); 12890#L8 assume !(1 == ~n); 12852#L11 [2019-11-28 21:16:36,985 INFO L796 eck$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 21:16:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:36,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-11-28 21:16:36,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:36,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187073316] [2019-11-28 21:16:36,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:37,265 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 21:16:37,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187073316] [2019-11-28 21:16:37,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322149603] [2019-11-28 21:16:37,266 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 21:16:37,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 21:16:37,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:37,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:37,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:37,389 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 21:16:37,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:37,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 30 [2019-11-28 21:16:37,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983264528] [2019-11-28 21:16:37,391 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-11-28 21:16:37,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:37,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603602658] [2019-11-28 21:16:37,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:37,396 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:37,445 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:37,445 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:37,445 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:37,446 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:37,446 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:37,446 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:37,446 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:37,446 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:37,446 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2019-11-28 21:16:37,446 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:37,447 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:37,447 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 21:16:37,460 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 21:16:37,462 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 21:16:37,463 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 21:16:37,517 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:37,517 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 21:16:37,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:37,523 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 21:16:37,535 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:37,535 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:40,278 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:40,280 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:40,280 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:40,281 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:40,281 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:40,281 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:40,281 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:40,281 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:40,281 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:40,281 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2019-11-28 21:16:40,281 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:40,281 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:40,282 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 21:16:40,286 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 21:16:40,287 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 21:16:40,289 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 21:16:40,348 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:40,349 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 21:16:40,363 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 21:16:40,365 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:40,365 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:40,365 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:40,365 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:40,365 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:40,366 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:40,366 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:40,367 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 21:16:40,374 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 21:16:40,375 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:40,375 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:40,375 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:40,375 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:40,376 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:40,376 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:40,376 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:40,377 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 21:16:40,382 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 21:16:40,384 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:40,384 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:40,384 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:40,384 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:40,384 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:40,384 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:40,384 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:40,386 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:16:40,391 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 21:16:40,392 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:40,392 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:40,392 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:40,392 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:40,392 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:40,393 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:40,393 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:40,396 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:40,400 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:40,400 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 21:16:40,407 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:40,407 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:40,407 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:40,407 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:40,409 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,493 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,531 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 21:16:40,531 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 21:16:40,531 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 21:16:40,594 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 21:16:40,595 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 21:16:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:16:40,595 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:16:40,596 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:40,596 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,681 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,685 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,739 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 21:16:40,739 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 21:16:40,739 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 21:16:40,856 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 21:16:40,860 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 21:16:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:16:40,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:16:40,861 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:40,861 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:40,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:16:40,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:40,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:40,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:41,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:41,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:41,048 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 21:16:41,051 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 21:16:41,051 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 761 states and 1128 transitions. cyclomatic complexity: 380 Second operand 6 states. [2019-11-28 21:16:41,186 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 21:16:41,187 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 21:16:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 21:16:41,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:16:41,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:41,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-28 21:16:41,189 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:41,189 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-11-28 21:16:41,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:41,191 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1029 states and 1473 transitions. [2019-11-28 21:16:41,202 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:41,215 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1029 states to 761 states and 1128 transitions. [2019-11-28 21:16:41,215 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 228 [2019-11-28 21:16:41,218 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 264 [2019-11-28 21:16:41,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 761 states and 1128 transitions. [2019-11-28 21:16:41,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:41,218 INFO L688 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 21:16:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states and 1128 transitions. [2019-11-28 21:16:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2019-11-28 21:16:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 761 states. [2019-11-28 21:16:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1128 transitions. [2019-11-28 21:16:41,246 INFO L711 BuchiCegarLoop]: Abstraction has 761 states and 1128 transitions. [2019-11-28 21:16:41,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-28 21:16:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2019-11-28 21:16:41,247 INFO L87 Difference]: Start difference. First operand 761 states and 1128 transitions. Second operand 30 states. [2019-11-28 21:16:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:41,779 INFO L93 Difference]: Finished difference Result 395 states and 515 transitions. [2019-11-28 21:16:41,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 21:16:41,780 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 395 states and 515 transitions. [2019-11-28 21:16:41,783 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:41,787 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 395 states to 361 states and 479 transitions. [2019-11-28 21:16:41,788 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2019-11-28 21:16:41,788 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 167 [2019-11-28 21:16:41,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 361 states and 479 transitions. [2019-11-28 21:16:41,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:41,789 INFO L688 BuchiCegarLoop]: Abstraction has 361 states and 479 transitions. [2019-11-28 21:16:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states and 479 transitions. [2019-11-28 21:16:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 317. [2019-11-28 21:16:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-28 21:16:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2019-11-28 21:16:41,798 INFO L711 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 21:16:41,798 INFO L591 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 21:16:41,799 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-28 21:16:41,799 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 317 states and 424 transitions. [2019-11-28 21:16:41,801 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:41,802 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:41,802 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:41,803 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 21:16:41,803 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:41,804 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 21:16:41,804 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 21:16:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:41,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1455011085, now seen corresponding path program 4 times [2019-11-28 21:16:41,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:41,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035421948] [2019-11-28 21:16:41,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:42,158 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 21:16:42,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035421948] [2019-11-28 21:16:42,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143742473] [2019-11-28 21:16:42,159 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 21:16:42,209 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 21:16:42,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:42,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:16:42,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:42,257 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 21:16:42,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:42,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 28 [2019-11-28 21:16:42,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021432530] [2019-11-28 21:16:42,260 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 5 times [2019-11-28 21:16:42,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:42,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796425428] [2019-11-28 21:16:42,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:42,265 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:42,309 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:42,309 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:42,309 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:42,309 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:42,309 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:42,309 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:42,309 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:42,309 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:42,310 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2019-11-28 21:16:42,310 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:42,310 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:42,311 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 21:16:42,314 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 21:16:42,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:42,327 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 21:16:42,377 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:42,377 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:42,390 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:42,390 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:42,394 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:42,395 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 21:16:42,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:42,403 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 21:16:42,408 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:42,408 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 21:16:42,420 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:42,421 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 21:16:42,441 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:42,442 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 21:16:45,433 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:45,435 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:45,435 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:45,435 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:45,435 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:45,435 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:45,435 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,436 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:45,436 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:45,436 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2019-11-28 21:16:45,436 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:45,436 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:45,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,438 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 21:16:45,440 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 21:16:45,447 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 21:16:45,487 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:45,488 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 21:16:45,494 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 21:16:45,495 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:45,495 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:45,495 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:45,495 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:45,495 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:45,496 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:45,496 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:45,497 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 21:16:45,502 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 21:16:45,504 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:45,504 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:45,504 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:45,504 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:45,504 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:45,505 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:45,505 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:45,506 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 21:16:45,512 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 21:16:45,514 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:45,514 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:45,514 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:45,515 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:45,515 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:45,516 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:45,516 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:45,519 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:45,521 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 21:16:45,521 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 21:16:45,525 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:45,525 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:45,525 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:45,525 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:45,527 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,669 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 21:16:45,669 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 21:16:45,670 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 21:16:45,769 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 21:16:45,770 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 21:16:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:16:45,771 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 21:16:45,771 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:45,771 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,938 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 21:16:45,939 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 21:16:45,939 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 21:16:46,035 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 21:16:46,036 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 21:16:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:16:46,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 21:16:46,037 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,037 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,116 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:46,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:46,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:46,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,176 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 21:16:46,177 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 21:16:46,177 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 317 states and 424 transitions. cyclomatic complexity: 111 Second operand 6 states. [2019-11-28 21:16:46,249 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 21:16:46,251 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 21:16:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 21:16:46,252 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 4 letters. [2019-11-28 21:16:46,253 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,253 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 21:16:46,254 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,254 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 8 letters. [2019-11-28 21:16:46,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,255 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 423 states and 554 transitions. [2019-11-28 21:16:46,259 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:46,263 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 423 states to 325 states and 434 transitions. [2019-11-28 21:16:46,264 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 122 [2019-11-28 21:16:46,264 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2019-11-28 21:16:46,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 325 states and 434 transitions. [2019-11-28 21:16:46,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:46,265 INFO L688 BuchiCegarLoop]: Abstraction has 325 states and 434 transitions. [2019-11-28 21:16:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states and 434 transitions. [2019-11-28 21:16:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2019-11-28 21:16:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-11-28 21:16:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 424 transitions. [2019-11-28 21:16:46,274 INFO L711 BuchiCegarLoop]: Abstraction has 317 states and 424 transitions. [2019-11-28 21:16:46,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-28 21:16:46,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2019-11-28 21:16:46,276 INFO L87 Difference]: Start difference. First operand 317 states and 424 transitions. Second operand 28 states. [2019-11-28 21:16:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:46,937 INFO L93 Difference]: Finished difference Result 412 states and 550 transitions. [2019-11-28 21:16:46,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-28 21:16:46,938 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 412 states and 550 transitions. [2019-11-28 21:16:46,942 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:46,948 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 412 states to 404 states and 536 transitions. [2019-11-28 21:16:46,948 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2019-11-28 21:16:46,949 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 173 [2019-11-28 21:16:46,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 404 states and 536 transitions. [2019-11-28 21:16:46,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:46,950 INFO L688 BuchiCegarLoop]: Abstraction has 404 states and 536 transitions. [2019-11-28 21:16:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states and 536 transitions. [2019-11-28 21:16:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 359. [2019-11-28 21:16:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-11-28 21:16:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 480 transitions. [2019-11-28 21:16:46,964 INFO L711 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 21:16:46,964 INFO L591 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 21:16:46,964 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-11-28 21:16:46,964 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 359 states and 480 transitions. [2019-11-28 21:16:46,968 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:46,968 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:46,968 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:46,970 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 21:16:46,970 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:46,971 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 21:16:46,971 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 21:16:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1736707112, now seen corresponding path program 5 times [2019-11-28 21:16:46,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:46,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050178218] [2019-11-28 21:16:46,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,294 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 21:16:47,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050178218] [2019-11-28 21:16:47,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843188583] [2019-11-28 21:16:47,296 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 21:16:47,348 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-28 21:16:47,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:47,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 21:16:47,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:47,407 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 21:16:47,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:47,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 25 [2019-11-28 21:16:47,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646036725] [2019-11-28 21:16:47,408 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 6 times [2019-11-28 21:16:47,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:47,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632449795] [2019-11-28 21:16:47,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,413 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:47,453 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:47,454 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:47,454 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:47,454 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:47,454 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:47,454 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,455 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:47,455 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:47,455 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2019-11-28 21:16:47,455 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:47,455 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:47,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,458 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 21:16:47,459 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 21:16:47,461 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 21:16:47,508 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:47,508 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 21:16:47,513 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:47,513 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:47,516 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:47,516 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 21:16:47,522 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:47,523 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:47,525 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:47,525 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 21:16:47,531 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:47,531 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:47,534 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:47,534 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 21:16:47,540 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:47,540 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 21:16:47,551 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:47,551 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:58,110 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:58,112 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:58,113 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:58,113 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:58,113 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:58,113 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:58,113 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:58,113 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:58,113 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:58,113 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2019-11-28 21:16:58,113 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:58,113 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:58,114 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 21:16:58,116 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 21:16:58,118 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 21:16:58,126 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 21:16:58,176 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:58,176 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 21:16:58,181 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 21:16:58,182 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:58,182 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:58,183 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:58,183 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:58,183 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:58,183 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:58,183 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:58,184 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 21:16:58,190 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 21:16:58,192 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:58,192 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:58,192 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:58,193 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:58,193 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:58,193 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:58,193 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:58,194 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 21:16:58,199 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 21:16:58,201 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:58,201 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:58,201 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:58,201 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:58,201 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:58,202 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:58,202 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:58,204 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:58,207 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:58,207 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 21:16:58,211 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:58,211 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:58,211 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:58,211 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:58,213 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:58,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 21:16:58,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:58,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:58,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:58,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:58,378 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 21:16:58,379 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 21:16:58,379 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 21:16:58,437 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 21:16:58,438 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 21:16:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:16:58,439 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 21:16:58,439 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:58,439 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:58,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 21:16:58,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:58,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:58,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:58,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:58,601 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 21:16:58,602 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 21:16:58,602 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 21:16:58,693 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 21:16:58,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:16:58,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 21:16:58,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:58,695 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:58,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 21:16:58,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:58,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:58,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:58,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:58,874 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 21:16:58,874 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 21:16:58,875 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 359 states and 480 transitions. cyclomatic complexity: 125 Second operand 6 states. [2019-11-28 21:16:58,961 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 21:16:58,962 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 21:16:58,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:16:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 21:16:58,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 4 letters. [2019-11-28 21:16:58,964 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:58,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 76 letters. Loop has 4 letters. [2019-11-28 21:16:58,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:58,965 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 72 letters. Loop has 8 letters. [2019-11-28 21:16:58,966 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:58,967 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 490 states and 640 transitions. [2019-11-28 21:16:58,973 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-28 21:16:58,979 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 490 states to 371 states and 494 transitions. [2019-11-28 21:16:58,980 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 127 [2019-11-28 21:16:58,980 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2019-11-28 21:16:58,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 371 states and 494 transitions. [2019-11-28 21:16:58,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:58,982 INFO L688 BuchiCegarLoop]: Abstraction has 371 states and 494 transitions. [2019-11-28 21:16:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states and 494 transitions. [2019-11-28 21:16:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 359. [2019-11-28 21:16:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-11-28 21:16:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 480 transitions. [2019-11-28 21:16:58,997 INFO L711 BuchiCegarLoop]: Abstraction has 359 states and 480 transitions. [2019-11-28 21:16:58,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:58,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-28 21:16:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2019-11-28 21:16:58,999 INFO L87 Difference]: Start difference. First operand 359 states and 480 transitions. Second operand 25 states. [2019-11-28 21:16:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:59,660 INFO L93 Difference]: Finished difference Result 495 states and 691 transitions. [2019-11-28 21:16:59,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-28 21:16:59,661 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 691 transitions. [2019-11-28 21:16:59,667 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:16:59,667 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 0 states and 0 transitions. [2019-11-28 21:16:59,667 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 21:16:59,667 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 21:16:59,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 21:16:59,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 21:16:59,668 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:59,668 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:59,668 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:59,668 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-11-28 21:16:59,668 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 21:16:59,669 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:16:59,669 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 21:16:59,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 09:16:59 BoogieIcfgContainer [2019-11-28 21:16:59,682 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 21:16:59,684 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 21:16:59,684 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 21:16:59,684 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 21:16:59,685 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:20" (3/4) ... [2019-11-28 21:16:59,690 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 21:16:59,690 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 21:16:59,694 INFO L168 Benchmark]: Toolchain (without parser) took 39495.39 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 378.5 MB). Free memory was 960.4 MB in the beginning and 1.0 GB in the end (delta: -54.3 MB). Peak memory consumption was 324.2 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:59,694 INFO L168 Benchmark]: CDTParser took 0.18 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 21:16:59,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.85 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:59,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.36 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:59,702 INFO L168 Benchmark]: Boogie Preprocessor took 73.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -191.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:59,703 INFO L168 Benchmark]: RCFGBuilder took 227.88 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:59,703 INFO L168 Benchmark]: BuchiAutomizer took 38862.32 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 233.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.6 MB). Peak memory consumption was 340.5 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:59,704 INFO L168 Benchmark]: Witness Printer took 7.02 ms. Allocated memory is still 1.4 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:59,711 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 291.85 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.36 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 73.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -191.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 227.88 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 38862.32 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 233.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.6 MB). Peak memory consumption was 340.5 MB. Max. memory is 11.5 GB. * Witness Printer took 7.02 ms. Allocated memory is still 1.4 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 38.8s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 29.2s. Construction of modules took 2.6s. Büchi inclusion checks took 6.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 16. Automata minimization 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 402 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.2s 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: 16ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 23.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...