./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e40a98558d0111ea95f3ee60a44cc14c7768182 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:47:43,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:47:43,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:47:43,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:47:43,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:47:43,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:47:43,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:47:43,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:47:43,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:47:43,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:47:43,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:47:43,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:47:43,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:47:43,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:47:43,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:47:43,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:47:43,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:47:43,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:47:43,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:47:43,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:47:43,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:47:43,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:47:43,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:47:43,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:47:43,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:47:43,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:47:43,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:47:43,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:47:43,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:47:43,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:47:43,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:47:43,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:47:43,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:47:43,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:47:43,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:47:43,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:47:43,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:47:43,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:47:43,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:47:43,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:47:43,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:47:43,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-25 08:47:43,479 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:47:43,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:47:43,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:47:43,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:47:43,490 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:47:43,491 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-25 08:47:43,491 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-25 08:47:43,491 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-25 08:47:43,491 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-25 08:47:43,491 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-25 08:47:43,492 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-25 08:47:43,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:47:43,492 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:47:43,492 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:47:43,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:47:43,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:47:43,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:47:43,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-25 08:47:43,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-25 08:47:43,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-25 08:47:43,494 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:47:43,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:47:43,495 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-25 08:47:43,495 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:47:43,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-25 08:47:43,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:47:43,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:47:43,496 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-25 08:47:43,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:47:43,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:47:43,497 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-25 08:47:43,498 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-25 08:47:43,498 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2019-11-25 08:47:43,667 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:47:43,684 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:47:43,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:47:43,689 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:47:43,689 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:47:43,690 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02.c [2019-11-25 08:47:43,751 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/data/e8e5ba37a/e4ef184bfbbd409aa0a6bdfd5d49d686/FLAGd3d9fa707 [2019-11-25 08:47:44,148 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:47:44,149 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/sv-benchmarks/c/recursive/Fibonacci02.c [2019-11-25 08:47:44,154 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/data/e8e5ba37a/e4ef184bfbbd409aa0a6bdfd5d49d686/FLAGd3d9fa707 [2019-11-25 08:47:44,561 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/data/e8e5ba37a/e4ef184bfbbd409aa0a6bdfd5d49d686 [2019-11-25 08:47:44,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:47:44,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:47:44,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:47:44,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:47:44,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:47:44,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54728782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44, skipping insertion in model container [2019-11-25 08:47:44,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:47:44,602 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:47:44,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:47:44,743 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:47:44,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:47:44,872 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:47:44,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44 WrapperNode [2019-11-25 08:47:44,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:47:44,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:47:44,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:47:44,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:47:44,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:47:44,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:47:44,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:47:44,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:47:44,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... [2019-11-25 08:47:44,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:47:44,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:47:44,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:47:44,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:47:44,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:44,984 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-11-25 08:47:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-11-25 08:47:44,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:47:44,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:47:45,118 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:47:45,118 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:47:45,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:45 BoogieIcfgContainer [2019-11-25 08:47:45,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:47:45,120 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-25 08:47:45,120 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-25 08:47:45,122 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-25 08:47:45,123 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:47:45,123 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 25.11 08:47:44" (1/3) ... [2019-11-25 08:47:45,124 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7310afa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:47:45, skipping insertion in model container [2019-11-25 08:47:45,125 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:47:45,125 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:47:44" (2/3) ... [2019-11-25 08:47:45,125 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7310afa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:47:45, skipping insertion in model container [2019-11-25 08:47:45,125 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:47:45,125 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:45" (3/3) ... [2019-11-25 08:47:45,127 INFO L371 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2019-11-25 08:47:45,189 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-25 08:47:45,190 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-25 08:47:45,190 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-25 08:47:45,190 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:47:45,190 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:47:45,190 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-25 08:47:45,190 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:47:45,191 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-25 08:47:45,205 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2019-11-25 08:47:45,246 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:47:45,246 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:45,246 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:45,254 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-25 08:47:45,254 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:47:45,254 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-25 08:47:45,254 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2019-11-25 08:47:45,256 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:47:45,256 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:45,256 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:45,257 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-25 08:47:45,257 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:47:45,264 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 6#L27true call main_#t~ret2 := fibonacci(main_~x~0);< 16#fibonacciENTRYtrue [2019-11-25 08:47:45,264 INFO L796 eck$LassoCheckResult]: Loop: 16#fibonacciENTRYtrue ~n := #in~n; 14#L15true assume !(~n < 1); 8#L17true assume !(1 == ~n); 5#L20true call #t~ret0 := fibonacci(~n - 1);< 16#fibonacciENTRYtrue [2019-11-25 08:47:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:45,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1426, now seen corresponding path program 1 times [2019-11-25 08:47:45,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:45,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587251655] [2019-11-25 08:47:45,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:45,405 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 927640, now seen corresponding path program 1 times [2019-11-25 08:47:45,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:45,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054014338] [2019-11-25 08:47:45,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:45,433 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:45,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1316945065, now seen corresponding path program 1 times [2019-11-25 08:47:45,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:45,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219130873] [2019-11-25 08:47:45,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:45,464 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:45,560 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:45,561 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:45,561 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:45,561 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:45,561 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:45,561 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,562 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:45,562 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:45,562 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2019-11-25 08:47:45,562 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:45,562 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:45,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,690 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:45,691 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,712 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:45,713 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:45,719 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:45,720 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,727 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:45,727 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:45,731 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:45,732 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,750 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:45,750 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:45,755 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:45,755 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:45,760 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:45,764 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:45,764 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:45,771 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,784 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:45,785 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:45,837 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:45,839 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:45,839 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:45,839 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:45,839 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:45,839 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:45,839 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,839 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:45,839 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:45,839 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2019-11-25 08:47:45,840 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:45,840 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:45,841 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,855 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,862 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:45,942 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:45,947 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 8 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,958 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 [2019-11-25 08:47:45,960 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:45,961 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:45,961 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:45,961 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:45,961 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:45,963 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:45,963 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:45,966 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,980 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 [2019-11-25 08:47:45,981 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:45,982 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:45,982 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:45,982 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:45,982 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:45,983 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:45,983 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:45,985 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:45,996 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 [2019-11-25 08:47:45,997 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:45,997 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:45,997 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:45,998 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:45,998 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:45,999 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:45,999 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:46,003 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:46,010 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 [2019-11-25 08:47:46,011 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:46,012 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:46,012 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:46,012 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:46,012 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:46,013 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:46,013 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:46,015 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:46,020 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 [2019-11-25 08:47:46,021 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:46,021 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:46,022 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:46,022 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:46,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:46,023 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:46,023 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:46,026 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:46,029 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-25 08:47:46,029 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:46,043 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:46,044 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:46,044 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:46,044 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:46,049 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:47:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:46,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:47:46,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:46,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:46,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:46,204 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 [2019-11-25 08:47:46,206 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states. Second operand 4 states. [2019-11-25 08:47:46,336 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states.. Second operand 4 states. Result 46 states and 58 transitions. Complement of second has 12 states. [2019-11-25 08:47:46,337 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 [2019-11-25 08:47:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-25 08:47:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-25 08:47:46,341 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-25 08:47:46,343 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:46,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-25 08:47:46,343 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:46,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-25 08:47:46,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:46,345 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 46 states and 58 transitions. [2019-11-25 08:47:46,349 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:47:46,356 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 46 states to 24 states and 33 transitions. [2019-11-25 08:47:46,357 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-25 08:47:46,358 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-25 08:47:46,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-25 08:47:46,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:46,361 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-25 08:47:46,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-25 08:47:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-25 08:47:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-25 08:47:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-25 08:47:46,385 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-25 08:47:46,385 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-25 08:47:46,385 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-25 08:47:46,385 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-25 08:47:46,386 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:47:46,387 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:46,387 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:46,388 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:46,388 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:46,388 INFO L794 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 120#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 128#fibonacciENTRY ~n := #in~n; 125#L15 assume !(~n < 1); 126#L17 assume !(1 == ~n); 118#L20 call #t~ret0 := fibonacci(~n - 1);< 119#fibonacciENTRY ~n := #in~n; 122#L15 assume ~n < 1;#res := 0; 123#fibonacciFINAL assume true; 121#fibonacciEXIT >#28#return; 116#L20-1 [2019-11-25 08:47:46,388 INFO L796 eck$LassoCheckResult]: Loop: 116#L20-1 call #t~ret1 := fibonacci(~n - 2);< 117#fibonacciENTRY ~n := #in~n; 133#L15 assume !(~n < 1); 131#L17 assume !(1 == ~n); 115#L20 call #t~ret0 := fibonacci(~n - 1);< 117#fibonacciENTRY ~n := #in~n; 133#L15 assume ~n < 1;#res := 0; 130#fibonacciFINAL assume true; 132#fibonacciEXIT >#28#return; 116#L20-1 [2019-11-25 08:47:46,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:46,389 INFO L82 PathProgramCache]: Analyzing trace with hash -940667652, now seen corresponding path program 1 times [2019-11-25 08:47:46,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:46,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988878000] [2019-11-25 08:47:46,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:46,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988878000] [2019-11-25 08:47:46,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003724508] [2019-11-25 08:47:46,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-25 08:47:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:46,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:47:46,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:46,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:46,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-25 08:47:46,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063442986] [2019-11-25 08:47:46,549 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:46,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:46,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1564066394, now seen corresponding path program 1 times [2019-11-25 08:47:46,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:46,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953067179] [2019-11-25 08:47:46,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:47:46,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953067179] [2019-11-25 08:47:46,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:47:46,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:47:46,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871807755] [2019-11-25 08:47:46,608 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:47:46,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:46,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:47:46,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:47:46,612 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-25 08:47:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:46,704 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-25 08:47:46,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:47:46,705 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-25 08:47:46,707 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:47:46,708 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-25 08:47:46,708 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-25 08:47:46,709 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-25 08:47:46,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-25 08:47:46,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:46,710 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-25 08:47:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-25 08:47:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-25 08:47:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-25 08:47:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-25 08:47:46,714 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-25 08:47:46,714 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-25 08:47:46,714 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-25 08:47:46,714 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-25 08:47:46,715 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:47:46,715 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:46,716 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:46,717 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:46,717 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-25 08:47:46,717 INFO L794 eck$LassoCheckResult]: Stem: 227#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 219#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 228#fibonacciENTRY ~n := #in~n; 225#L15 assume !(~n < 1); 226#L17 assume !(1 == ~n); 218#L20 call #t~ret0 := fibonacci(~n - 1);< 220#fibonacciENTRY ~n := #in~n; 223#L15 assume !(~n < 1); 224#L17 assume 1 == ~n;#res := 1; 229#fibonacciFINAL assume true; 235#fibonacciEXIT >#28#return; 216#L20-1 [2019-11-25 08:47:46,718 INFO L796 eck$LassoCheckResult]: Loop: 216#L20-1 call #t~ret1 := fibonacci(~n - 2);< 217#fibonacciENTRY ~n := #in~n; 236#L15 assume !(~n < 1); 232#L17 assume !(1 == ~n); 215#L20 call #t~ret0 := fibonacci(~n - 1);< 217#fibonacciENTRY ~n := #in~n; 236#L15 assume !(~n < 1); 232#L17 assume !(1 == ~n); 215#L20 call #t~ret0 := fibonacci(~n - 1);< 217#fibonacciENTRY ~n := #in~n; 236#L15 assume !(~n < 1); 232#L17 assume 1 == ~n;#res := 1; 233#fibonacciFINAL assume true; 234#fibonacciEXIT >#28#return; 216#L20-1 call #t~ret1 := fibonacci(~n - 2);< 217#fibonacciENTRY ~n := #in~n; 236#L15 assume ~n < 1;#res := 0; 237#fibonacciFINAL assume true; 221#fibonacciEXIT >#30#return; 222#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 230#fibonacciFINAL assume true; 231#fibonacciEXIT >#28#return; 216#L20-1 [2019-11-25 08:47:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash 904098378, now seen corresponding path program 1 times [2019-11-25 08:47:46,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:46,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640054244] [2019-11-25 08:47:46,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:46,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640054244] [2019-11-25 08:47:46,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239744344] [2019-11-25 08:47:46,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:46,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:47:46,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:46,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:46,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-25 08:47:46,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455774008] [2019-11-25 08:47:46,839 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:46,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:46,839 INFO L82 PathProgramCache]: Analyzing trace with hash 476609746, now seen corresponding path program 1 times [2019-11-25 08:47:46,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:46,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912004990] [2019-11-25 08:47:46,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:46,859 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:47,155 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:47,156 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:47,156 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:47,156 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:47,156 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:47,156 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:47,156 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:47,156 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:47,157 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2019-11-25 08:47:47,157 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:47,157 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:47,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:47,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:47,166 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:47,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:47,226 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:47,226 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:47,244 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:47,244 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:47,248 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:47,249 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=1} Honda state: {fibonacci_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:47,265 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:47,265 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:47,279 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:47,280 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:47,303 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:47,303 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:47,325 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:47,326 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:48,431 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:48,433 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:48,433 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:48,433 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:48,434 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:48,434 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:48,434 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:48,434 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:48,434 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:48,434 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2019-11-25 08:47:48,434 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:48,434 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:48,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:48,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:48,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:48,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:48,545 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:48,545 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:48,553 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 [2019-11-25 08:47:48,555 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:48,555 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:48,556 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:48,556 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:48,556 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:48,557 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:48,557 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:48,560 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:48,572 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 [2019-11-25 08:47:48,573 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:48,573 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:48,574 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:48,574 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:48,574 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:48,576 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:48,576 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:48,579 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:48,584 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:47:48,584 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:48,595 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:48,595 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:48,596 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:48,596 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-25 08:47:48,598 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:48,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:47:48,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:48,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:47:48,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:47:48,764 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 [2019-11-25 08:47:48,765 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 8 states. [2019-11-25 08:47:49,014 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 8 states. Result 134 states and 182 transitions. Complement of second has 36 states. [2019-11-25 08:47:49,019 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 [2019-11-25 08:47:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-25 08:47:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-25 08:47:49,021 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 11 letters. Loop has 22 letters. [2019-11-25 08:47:49,022 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:49,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 33 letters. Loop has 22 letters. [2019-11-25 08:47:49,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:49,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 11 letters. Loop has 44 letters. [2019-11-25 08:47:49,027 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:49,029 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-25 08:47:49,037 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-25 08:47:49,042 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-25 08:47:49,042 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-25 08:47:49,043 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-25 08:47:49,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-25 08:47:49,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:49,044 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-25 08:47:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-25 08:47:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-25 08:47:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-25 08:47:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-25 08:47:49,059 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-25 08:47:49,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:47:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:47:49,060 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-25 08:47:49,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:49,160 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-25 08:47:49,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:47:49,162 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-25 08:47:49,166 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-25 08:47:49,170 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-25 08:47:49,170 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-25 08:47:49,171 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-25 08:47:49,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-25 08:47:49,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:49,171 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-25 08:47:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-25 08:47:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-25 08:47:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-25 08:47:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-25 08:47:49,192 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-25 08:47:49,193 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-25 08:47:49,193 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-25 08:47:49,193 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-25 08:47:49,199 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-25 08:47:49,199 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:49,199 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:49,203 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:49,205 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-25 08:47:49,205 INFO L794 eck$LassoCheckResult]: Stem: 797#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 795#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 803#fibonacciENTRY ~n := #in~n; 844#L15 assume !(~n < 1); 843#L17 assume !(1 == ~n); 794#L20 call #t~ret0 := fibonacci(~n - 1);< 796#fibonacciENTRY ~n := #in~n; 800#L15 assume !(~n < 1); 802#L17 assume !(1 == ~n); 801#L20 call #t~ret0 := fibonacci(~n - 1);< 796#fibonacciENTRY ~n := #in~n; 800#L15 assume !(~n < 1); 802#L17 assume !(1 == ~n); 801#L20 call #t~ret0 := fibonacci(~n - 1);< 796#fibonacciENTRY ~n := #in~n; 810#L15 assume !(~n < 1); 842#L17 assume 1 == ~n;#res := 1; 841#fibonacciFINAL assume true; 840#fibonacciEXIT >#28#return; 813#L20-1 call #t~ret1 := fibonacci(~n - 2);< 838#fibonacciENTRY ~n := #in~n; 872#L15 assume ~n < 1;#res := 0; 871#fibonacciFINAL assume true; 870#fibonacciEXIT >#30#return; 869#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 866#fibonacciFINAL assume true; 863#fibonacciEXIT >#28#return; 791#L20-1 [2019-11-25 08:47:49,205 INFO L796 eck$LassoCheckResult]: Loop: 791#L20-1 call #t~ret1 := fibonacci(~n - 2);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume !(1 == ~n); 790#L20 call #t~ret0 := fibonacci(~n - 1);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume !(1 == ~n); 790#L20 call #t~ret0 := fibonacci(~n - 1);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume 1 == ~n;#res := 1; 860#fibonacciFINAL assume true; 861#fibonacciEXIT >#28#return; 791#L20-1 call #t~ret1 := fibonacci(~n - 2);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume !(1 == ~n); 790#L20 call #t~ret0 := fibonacci(~n - 1);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume 1 == ~n;#res := 1; 860#fibonacciFINAL assume true; 861#fibonacciEXIT >#28#return; 791#L20-1 call #t~ret1 := fibonacci(~n - 2);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume ~n < 1;#res := 0; 846#fibonacciFINAL assume true; 868#fibonacciEXIT >#30#return; 862#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 865#fibonacciFINAL assume true; 864#fibonacciEXIT >#30#return; 862#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 865#fibonacciFINAL assume true; 864#fibonacciEXIT >#28#return; 791#L20-1 [2019-11-25 08:47:49,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1397716613, now seen corresponding path program 1 times [2019-11-25 08:47:49,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:49,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312261063] [2019-11-25 08:47:49,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:47:49,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312261063] [2019-11-25 08:47:49,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175412298] [2019-11-25 08:47:49,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:47:49,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:47:49,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:49,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-25 08:47:49,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453262760] [2019-11-25 08:47:49,423 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1986955448, now seen corresponding path program 2 times [2019-11-25 08:47:49,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:49,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651251136] [2019-11-25 08:47:49,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-25 08:47:49,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651251136] [2019-11-25 08:47:49,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995944308] [2019-11-25 08:47:49,536 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:49,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:47:49,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:49,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:47:49,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-25 08:47:49,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:49,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-25 08:47:49,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795399116] [2019-11-25 08:47:49,612 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:47:49,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:47:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:47:49,613 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-25 08:47:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:49,834 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-25 08:47:49,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:47:49,835 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-25 08:47:49,839 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-25 08:47:49,841 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-25 08:47:49,841 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-25 08:47:49,841 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-25 08:47:49,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-25 08:47:49,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:49,842 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-25 08:47:49,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-25 08:47:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-25 08:47:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-25 08:47:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-25 08:47:49,860 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-25 08:47:49,860 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-25 08:47:49,860 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-25 08:47:49,860 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-25 08:47:49,862 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-25 08:47:49,862 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:49,863 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:49,864 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:49,865 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2019-11-25 08:47:49,865 INFO L794 eck$LassoCheckResult]: Stem: 1300#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 1301#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 1308#fibonacciENTRY ~n := #in~n; 1349#L15 assume !(~n < 1); 1313#L17 assume !(1 == ~n); 1298#L20 call #t~ret0 := fibonacci(~n - 1);< 1310#fibonacciENTRY ~n := #in~n; 1306#L15 assume !(~n < 1); 1307#L17 assume !(1 == ~n); 1297#L20 call #t~ret0 := fibonacci(~n - 1);< 1299#fibonacciENTRY ~n := #in~n; 1347#L15 assume !(~n < 1); 1345#L17 assume !(1 == ~n); 1340#L20 call #t~ret0 := fibonacci(~n - 1);< 1299#fibonacciENTRY ~n := #in~n; 1347#L15 assume !(~n < 1); 1345#L17 assume !(1 == ~n); 1340#L20 call #t~ret0 := fibonacci(~n - 1);< 1299#fibonacciENTRY ~n := #in~n; 1348#L15 assume !(~n < 1); 1346#L17 assume 1 == ~n;#res := 1; 1344#fibonacciFINAL assume true; 1343#fibonacciEXIT >#28#return; 1323#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1341#fibonacciENTRY ~n := #in~n; 1391#L15 assume ~n < 1;#res := 0; 1390#fibonacciFINAL assume true; 1389#fibonacciEXIT >#30#return; 1387#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1386#fibonacciFINAL assume true; 1382#fibonacciEXIT >#28#return; 1353#L20-1 [2019-11-25 08:47:49,865 INFO L796 eck$LassoCheckResult]: Loop: 1353#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume !(1 == ~n); 1356#L20 call #t~ret0 := fibonacci(~n - 1);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume !(1 == ~n); 1356#L20 call #t~ret0 := fibonacci(~n - 1);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume !(1 == ~n); 1356#L20 call #t~ret0 := fibonacci(~n - 1);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume 1 == ~n;#res := 1; 1312#fibonacciFINAL assume true; 1393#fibonacciEXIT >#28#return; 1294#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1296#fibonacciENTRY ~n := #in~n; 1350#L15 assume ~n < 1;#res := 0; 1351#fibonacciFINAL assume true; 1394#fibonacciEXIT >#30#return; 1377#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1392#fibonacciFINAL assume true; 1381#fibonacciEXIT >#28#return; 1353#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume !(1 == ~n); 1356#L20 call #t~ret0 := fibonacci(~n - 1);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume 1 == ~n;#res := 1; 1312#fibonacciFINAL assume true; 1393#fibonacciEXIT >#28#return; 1294#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1296#fibonacciENTRY ~n := #in~n; 1350#L15 assume ~n < 1;#res := 0; 1351#fibonacciFINAL assume true; 1394#fibonacciEXIT >#30#return; 1377#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1392#fibonacciFINAL assume true; 1381#fibonacciEXIT >#30#return; 1379#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1384#fibonacciFINAL assume true; 1378#fibonacciEXIT >#28#return; 1353#L20-1 [2019-11-25 08:47:49,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2008361138, now seen corresponding path program 2 times [2019-11-25 08:47:49,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:49,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103434714] [2019-11-25 08:47:49,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:47:50,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103434714] [2019-11-25 08:47:50,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771739479] [2019-11-25 08:47:50,034 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:50,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:47:50,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:50,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:47:50,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:47:50,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:50,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-25 08:47:50,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648266504] [2019-11-25 08:47:50,090 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:50,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:50,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1980387862, now seen corresponding path program 3 times [2019-11-25 08:47:50,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:50,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101336466] [2019-11-25 08:47:50,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-25 08:47:50,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101336466] [2019-11-25 08:47:50,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229867365] [2019-11-25 08:47:50,254 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:50,292 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-25 08:47:50,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:50,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:47:50,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-25 08:47:50,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:50,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2019-11-25 08:47:50,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512288622] [2019-11-25 08:47:50,335 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:47:50,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:50,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:47:50,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:47:50,336 INFO L87 Difference]: Start difference. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 14 states. [2019-11-25 08:47:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:50,629 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2019-11-25 08:47:50,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:47:50,629 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 127 states and 171 transitions. [2019-11-25 08:47:50,632 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-25 08:47:50,636 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 127 states to 125 states and 169 transitions. [2019-11-25 08:47:50,636 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 84 [2019-11-25 08:47:50,637 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2019-11-25 08:47:50,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 169 transitions. [2019-11-25 08:47:50,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:50,637 INFO L688 BuchiCegarLoop]: Abstraction has 125 states and 169 transitions. [2019-11-25 08:47:50,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states and 169 transitions. [2019-11-25 08:47:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-11-25 08:47:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-25 08:47:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 169 transitions. [2019-11-25 08:47:50,648 INFO L711 BuchiCegarLoop]: Abstraction has 125 states and 169 transitions. [2019-11-25 08:47:50,648 INFO L591 BuchiCegarLoop]: Abstraction has 125 states and 169 transitions. [2019-11-25 08:47:50,648 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-25 08:47:50,648 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 125 states and 169 transitions. [2019-11-25 08:47:50,650 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-25 08:47:50,650 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:50,650 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:50,652 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:50,652 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-25 08:47:50,652 INFO L794 eck$LassoCheckResult]: Stem: 1935#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 1921#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 1936#fibonacciENTRY ~n := #in~n; 1933#L15 assume !(~n < 1); 1934#L17 assume !(1 == ~n); 1920#L20 call #t~ret0 := fibonacci(~n - 1);< 1922#fibonacciENTRY ~n := #in~n; 1940#L15 assume !(~n < 1); 1948#L17 assume !(1 == ~n); 1949#L20 call #t~ret0 := fibonacci(~n - 1);< 1990#fibonacciENTRY ~n := #in~n; 1989#L15 assume !(~n < 1); 1988#L17 assume !(1 == ~n); 1975#L20 call #t~ret0 := fibonacci(~n - 1);< 1981#fibonacciENTRY ~n := #in~n; 1987#L15 assume !(~n < 1); 1986#L17 assume !(1 == ~n); 1976#L20 call #t~ret0 := fibonacci(~n - 1);< 1981#fibonacciENTRY ~n := #in~n; 1987#L15 assume !(~n < 1); 1986#L17 assume !(1 == ~n); 1976#L20 call #t~ret0 := fibonacci(~n - 1);< 1981#fibonacciENTRY ~n := #in~n; 1985#L15 assume !(~n < 1); 1984#L17 assume 1 == ~n;#res := 1; 1982#fibonacciFINAL assume true; 1980#fibonacciEXIT >#28#return; 1955#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1977#fibonacciENTRY ~n := #in~n; 2028#L15 assume ~n < 1;#res := 0; 2026#fibonacciFINAL assume true; 2025#fibonacciEXIT >#30#return; 2024#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 2023#fibonacciFINAL assume true; 2017#fibonacciEXIT >#28#return; 1944#L20-1 [2019-11-25 08:47:50,652 INFO L796 eck$LassoCheckResult]: Loop: 1944#L20-1 call #t~ret1 := fibonacci(~n - 2);< 2021#fibonacciENTRY ~n := #in~n; 2040#L15 assume !(~n < 1); 1941#L17 assume !(1 == ~n); 1945#L20 call #t~ret0 := fibonacci(~n - 1);< 2021#fibonacciENTRY ~n := #in~n; 2040#L15 assume !(~n < 1); 1941#L17 assume !(1 == ~n); 1945#L20 call #t~ret0 := fibonacci(~n - 1);< 2021#fibonacciENTRY ~n := #in~n; 2040#L15 assume !(~n < 1); 1941#L17 assume 1 == ~n;#res := 1; 1947#fibonacciFINAL assume true; 2012#fibonacciEXIT >#28#return; 1917#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1919#fibonacciENTRY ~n := #in~n; 2035#L15 assume ~n < 1;#res := 0; 2036#fibonacciFINAL assume true; 2030#fibonacciEXIT >#30#return; 2013#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 2027#fibonacciFINAL assume true; 2018#fibonacciEXIT >#28#return; 1944#L20-1 [2019-11-25 08:47:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:50,653 INFO L82 PathProgramCache]: Analyzing trace with hash 463907735, now seen corresponding path program 3 times [2019-11-25 08:47:50,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:50,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800977997] [2019-11-25 08:47:50,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:47:50,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800977997] [2019-11-25 08:47:50,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140347762] [2019-11-25 08:47:50,853 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:50,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-25 08:47:50,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:50,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:47:50,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:47:50,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:50,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-25 08:47:50,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837840083] [2019-11-25 08:47:50,945 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash 476609746, now seen corresponding path program 4 times [2019-11-25 08:47:50,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:50,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860038829] [2019-11-25 08:47:50,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:50,954 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:51,156 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:51,156 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:51,156 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:51,156 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:51,156 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:51,156 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:51,156 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:51,156 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:51,156 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2019-11-25 08:47:51,156 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:51,157 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:51,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:51,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:51,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:51,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:51,222 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:51,222 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:51,225 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:51,226 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:51,233 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:51,233 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:52,081 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:52,083 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:52,083 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:52,083 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:52,083 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:52,084 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:52,084 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:52,084 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:52,084 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:52,084 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2019-11-25 08:47:52,084 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:52,084 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:52,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:52,091 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:52,096 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:52,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:52,148 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:52,148 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:52,152 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 [2019-11-25 08:47:52,153 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:52,153 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:52,153 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:52,153 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:52,154 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:52,155 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:52,155 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:52,157 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:52,159 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-25 08:47:52,159 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:52,162 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:52,162 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:52,162 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:52,162 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-25 08:47:52,164 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:47:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:52,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:47:52,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:52,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:52,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:52,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:47:52,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:47:52,358 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 [2019-11-25 08:47:52,358 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50 Second operand 8 states. [2019-11-25 08:47:52,594 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50. Second operand 8 states. Result 194 states and 261 transitions. Complement of second has 33 states. [2019-11-25 08:47:52,599 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 [2019-11-25 08:47:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-25 08:47:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-25 08:47:52,600 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 35 letters. Loop has 22 letters. [2019-11-25 08:47:52,600 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:52,600 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:47:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:52,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:47:52,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:52,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:52,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:52,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:47:52,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:47:52,773 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 [2019-11-25 08:47:52,773 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50 Second operand 8 states. [2019-11-25 08:47:52,953 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50. Second operand 8 states. Result 319 states and 430 transitions. Complement of second has 25 states. [2019-11-25 08:47:52,956 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 [2019-11-25 08:47:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-25 08:47:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-25 08:47:52,957 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 35 letters. Loop has 22 letters. [2019-11-25 08:47:52,957 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:52,957 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:47:52,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:53,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:47:53,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:53,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:53,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:53,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:47:53,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:47:53,137 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 [2019-11-25 08:47:53,137 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50 Second operand 8 states. [2019-11-25 08:47:53,405 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50. Second operand 8 states. Result 1094 states and 1539 transitions. Complement of second has 130 states. [2019-11-25 08:47:53,406 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 [2019-11-25 08:47:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-25 08:47:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-25 08:47:53,407 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 35 letters. Loop has 22 letters. [2019-11-25 08:47:53,413 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:53,413 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 57 letters. Loop has 22 letters. [2019-11-25 08:47:53,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:53,417 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 35 letters. Loop has 44 letters. [2019-11-25 08:47:53,423 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:53,423 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1094 states and 1539 transitions. [2019-11-25 08:47:53,444 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-25 08:47:53,466 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1094 states to 618 states and 954 transitions. [2019-11-25 08:47:53,467 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 246 [2019-11-25 08:47:53,469 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 276 [2019-11-25 08:47:53,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 618 states and 954 transitions. [2019-11-25 08:47:53,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:53,470 INFO L688 BuchiCegarLoop]: Abstraction has 618 states and 954 transitions. [2019-11-25 08:47:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states and 954 transitions. [2019-11-25 08:47:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 494. [2019-11-25 08:47:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-25 08:47:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-25 08:47:53,520 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-25 08:47:53,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:53,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:47:53,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:47:53,521 INFO L87 Difference]: Start difference. First operand 494 states and 746 transitions. Second operand 16 states. [2019-11-25 08:47:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:53,856 INFO L93 Difference]: Finished difference Result 567 states and 846 transitions. [2019-11-25 08:47:53,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-25 08:47:53,856 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 567 states and 846 transitions. [2019-11-25 08:47:53,865 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-25 08:47:53,875 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 567 states to 561 states and 837 transitions. [2019-11-25 08:47:53,875 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 249 [2019-11-25 08:47:53,876 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 249 [2019-11-25 08:47:53,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 561 states and 837 transitions. [2019-11-25 08:47:53,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:53,876 INFO L688 BuchiCegarLoop]: Abstraction has 561 states and 837 transitions. [2019-11-25 08:47:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states and 837 transitions. [2019-11-25 08:47:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 534. [2019-11-25 08:47:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2019-11-25 08:47:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 805 transitions. [2019-11-25 08:47:53,899 INFO L711 BuchiCegarLoop]: Abstraction has 534 states and 805 transitions. [2019-11-25 08:47:53,899 INFO L591 BuchiCegarLoop]: Abstraction has 534 states and 805 transitions. [2019-11-25 08:47:53,899 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-25 08:47:53,900 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 534 states and 805 transitions. [2019-11-25 08:47:53,904 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-25 08:47:53,904 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:53,904 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:53,908 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:53,908 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:47:53,908 INFO L794 eck$LassoCheckResult]: Stem: 5645#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 5646#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 5647#fibonacciENTRY ~n := #in~n; 5648#L15 assume !(~n < 1); 5711#L17 assume !(1 == ~n); 5707#L20 call #t~ret0 := fibonacci(~n - 1);< 5710#fibonacciENTRY ~n := #in~n; 5709#L15 assume !(~n < 1); 5708#L17 assume !(1 == ~n); 5703#L20 call #t~ret0 := fibonacci(~n - 1);< 5706#fibonacciENTRY ~n := #in~n; 5705#L15 assume !(~n < 1); 5704#L17 assume !(1 == ~n); 5699#L20 call #t~ret0 := fibonacci(~n - 1);< 5701#fibonacciENTRY ~n := #in~n; 5702#L15 assume !(~n < 1); 5698#L17 assume !(1 == ~n); 5652#L20 call #t~ret0 := fibonacci(~n - 1);< 5695#fibonacciENTRY ~n := #in~n; 5697#L15 assume !(~n < 1); 5700#L17 assume !(1 == ~n); 5651#L20 call #t~ret0 := fibonacci(~n - 1);< 5695#fibonacciENTRY ~n := #in~n; 5696#L15 assume !(~n < 1); 5650#L17 assume 1 == ~n;#res := 1; 5653#fibonacciFINAL assume true; 6047#fibonacciEXIT >#28#return; 5636#L20-1 call #t~ret1 := fibonacci(~n - 2);< 5899#fibonacciENTRY ~n := #in~n; 5935#L15 assume !(~n < 1); 5927#L17 assume !(1 == ~n); 5928#L20 call #t~ret0 := fibonacci(~n - 1);< 5937#fibonacciENTRY ~n := #in~n; 6049#L15 assume !(~n < 1); 5939#L17 assume !(1 == ~n); 5940#L20 call #t~ret0 := fibonacci(~n - 1);< 5957#fibonacciENTRY [2019-11-25 08:47:53,908 INFO L796 eck$LassoCheckResult]: Loop: 5957#fibonacciENTRY ~n := #in~n; 5970#L15 assume !(~n < 1); 5967#L17 assume !(1 == ~n); 5955#L20 call #t~ret0 := fibonacci(~n - 1);< 5957#fibonacciENTRY [2019-11-25 08:47:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:53,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2028848867, now seen corresponding path program 1 times [2019-11-25 08:47:53,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:53,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000725686] [2019-11-25 08:47:53,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 9 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:54,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000725686] [2019-11-25 08:47:54,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426302647] [2019-11-25 08:47:54,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:54,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:47:54,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 46 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-25 08:47:54,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:54,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 22 [2019-11-25 08:47:54,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995859484] [2019-11-25 08:47:54,188 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash 927640, now seen corresponding path program 2 times [2019-11-25 08:47:54,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:54,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992901148] [2019-11-25 08:47:54,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:54,191 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:54,217 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:54,217 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:54,217 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:54,217 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:54,217 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:54,217 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:54,217 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:54,217 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:54,217 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2019-11-25 08:47:54,217 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:54,217 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:54,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,225 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,275 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:54,275 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:54,279 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:54,279 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:54,282 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:54,282 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:54,286 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:54,286 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:54,289 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:54,289 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:54,293 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:54,293 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:54,296 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:54,296 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:54,301 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:54,301 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:54,304 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:54,304 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:54,310 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:54,310 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:54,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:54,320 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:54,326 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:54,328 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:54,328 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:54,328 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:54,328 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:54,328 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:54,328 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:54,328 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:54,328 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:54,328 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2019-11-25 08:47:54,329 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:54,329 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:54,329 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:54,371 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:54,371 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:54,375 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:54,376 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:54,377 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:54,377 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:54,377 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:54,377 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:54,377 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:54,377 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:54,379 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:54,392 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 [2019-11-25 08:47:54,393 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:54,393 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:54,393 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:54,394 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:54,394 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:54,394 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:54,394 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:54,395 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:54,402 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 [2019-11-25 08:47:54,403 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:54,403 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:54,403 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:54,403 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:54,403 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:54,404 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:54,404 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:54,405 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:54,411 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 [2019-11-25 08:47:54,412 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:54,412 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:54,413 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:54,413 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:54,413 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:54,413 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:54,413 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:54,414 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:54,420 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 [2019-11-25 08:47:54,421 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:54,421 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:54,421 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:54,421 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:54,422 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:54,422 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:54,423 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:54,424 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:54,426 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:47:54,427 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 44 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:54,430 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:54,430 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:54,430 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:54,430 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2019-11-25 08:47:54,431 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:47:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:54,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-25 08:47:54,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:54,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:54,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:54,531 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 [2019-11-25 08:47:54,531 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281 Second operand 5 states. [2019-11-25 08:47:54,599 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281. Second operand 5 states. Result 550 states and 821 transitions. Complement of second has 13 states. [2019-11-25 08:47:54,601 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 [2019-11-25 08:47:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:47:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-25 08:47:54,602 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-25 08:47:54,602 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:54,602 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:47:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:54,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-25 08:47:54,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:54,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:54,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:54,703 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 [2019-11-25 08:47:54,703 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281 Second operand 5 states. [2019-11-25 08:47:54,763 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281. Second operand 5 states. Result 550 states and 821 transitions. Complement of second has 13 states. [2019-11-25 08:47:54,764 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 [2019-11-25 08:47:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:47:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-25 08:47:54,765 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-25 08:47:54,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:54,766 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:47:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:54,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-25 08:47:54,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:54,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:54,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:54,894 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 [2019-11-25 08:47:54,894 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281 Second operand 5 states. [2019-11-25 08:47:54,985 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281. Second operand 5 states. Result 701 states and 990 transitions. Complement of second has 14 states. [2019-11-25 08:47:54,985 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 [2019-11-25 08:47:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:47:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-25 08:47:54,986 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-25 08:47:54,986 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:54,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 40 letters. Loop has 4 letters. [2019-11-25 08:47:54,987 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:54,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 8 letters. [2019-11-25 08:47:54,987 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:54,988 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 701 states and 990 transitions. [2019-11-25 08:47:54,999 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-25 08:47:55,010 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 701 states to 588 states and 865 transitions. [2019-11-25 08:47:55,010 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2019-11-25 08:47:55,011 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 222 [2019-11-25 08:47:55,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 588 states and 865 transitions. [2019-11-25 08:47:55,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:55,012 INFO L688 BuchiCegarLoop]: Abstraction has 588 states and 865 transitions. [2019-11-25 08:47:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states and 865 transitions. [2019-11-25 08:47:55,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 558. [2019-11-25 08:47:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-25 08:47:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 829 transitions. [2019-11-25 08:47:55,053 INFO L711 BuchiCegarLoop]: Abstraction has 558 states and 829 transitions. [2019-11-25 08:47:55,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:55,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-25 08:47:55,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:47:55,055 INFO L87 Difference]: Start difference. First operand 558 states and 829 transitions. Second operand 22 states. [2019-11-25 08:47:55,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:55,460 INFO L93 Difference]: Finished difference Result 650 states and 972 transitions. [2019-11-25 08:47:55,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-25 08:47:55,460 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 972 transitions. [2019-11-25 08:47:55,469 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-25 08:47:55,479 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 635 states and 951 transitions. [2019-11-25 08:47:55,480 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 240 [2019-11-25 08:47:55,480 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 240 [2019-11-25 08:47:55,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 635 states and 951 transitions. [2019-11-25 08:47:55,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:55,481 INFO L688 BuchiCegarLoop]: Abstraction has 635 states and 951 transitions. [2019-11-25 08:47:55,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states and 951 transitions. [2019-11-25 08:47:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 590. [2019-11-25 08:47:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-25 08:47:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 881 transitions. [2019-11-25 08:47:55,502 INFO L711 BuchiCegarLoop]: Abstraction has 590 states and 881 transitions. [2019-11-25 08:47:55,502 INFO L591 BuchiCegarLoop]: Abstraction has 590 states and 881 transitions. [2019-11-25 08:47:55,502 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-25 08:47:55,503 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 590 states and 881 transitions. [2019-11-25 08:47:55,507 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-25 08:47:55,507 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:55,507 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:55,508 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [10, 10, 9, 8, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:55,508 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:47:55,509 INFO L794 eck$LassoCheckResult]: Stem: 9768#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 9769#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 9770#fibonacciENTRY ~n := #in~n; 9856#L15 assume !(~n < 1); 9855#L17 assume !(1 == ~n); 9831#L20 call #t~ret0 := fibonacci(~n - 1);< 9832#fibonacciENTRY ~n := #in~n; 9839#L15 assume !(~n < 1); 9836#L17 assume !(1 == ~n); 9834#L20 call #t~ret0 := fibonacci(~n - 1);< 9850#fibonacciENTRY ~n := #in~n; 9854#L15 assume !(~n < 1); 9853#L17 assume !(1 == ~n); 9845#L20 call #t~ret0 := fibonacci(~n - 1);< 9852#fibonacciENTRY ~n := #in~n; 9876#L15 assume !(~n < 1); 9874#L17 assume !(1 == ~n); 9841#L20 call #t~ret0 := fibonacci(~n - 1);< 9849#fibonacciENTRY ~n := #in~n; 9912#L15 assume !(~n < 1); 9910#L17 assume !(1 == ~n); 9866#L20 call #t~ret0 := fibonacci(~n - 1);< 9879#fibonacciENTRY ~n := #in~n; 9986#L15 assume !(~n < 1); 9985#L17 assume !(1 == ~n); 9863#L20 call #t~ret0 := fibonacci(~n - 1);< 9879#fibonacciENTRY ~n := #in~n; 10011#L15 assume !(~n < 1); 10068#L17 assume 1 == ~n;#res := 1; 10067#fibonacciFINAL assume true; 10066#fibonacciEXIT >#28#return; 9772#L20-1 call #t~ret1 := fibonacci(~n - 2);< 9984#fibonacciENTRY ~n := #in~n; 10248#L15 assume !(~n < 1); 10240#L17 assume !(1 == ~n); 10241#L20 call #t~ret0 := fibonacci(~n - 1);< 10250#fibonacciENTRY ~n := #in~n; 10267#L15 assume !(~n < 1); 10264#L17 assume !(1 == ~n); 9803#L20 call #t~ret0 := fibonacci(~n - 1);< 9805#fibonacciENTRY ~n := #in~n; 9806#L15 assume !(~n < 1); 10278#L17 assume !(1 == ~n); 9801#L20 [2019-11-25 08:47:55,509 INFO L796 eck$LassoCheckResult]: Loop: 9801#L20 call #t~ret0 := fibonacci(~n - 1);< 9805#fibonacciENTRY ~n := #in~n; 9806#L15 assume !(~n < 1); 10278#L17 assume !(1 == ~n); 9801#L20 [2019-11-25 08:47:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1567609232, now seen corresponding path program 2 times [2019-11-25 08:47:55,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:55,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022372923] [2019-11-25 08:47:55,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:55,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022372923] [2019-11-25 08:47:55,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363859994] [2019-11-25 08:47:55,825 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:55,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:47:55,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:55,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:47:55,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-25 08:47:55,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:55,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 26 [2019-11-25 08:47:55,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330003599] [2019-11-25 08:47:55,888 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:55,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1728010, now seen corresponding path program 3 times [2019-11-25 08:47:55,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:55,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168766784] [2019-11-25 08:47:55,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:55,890 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:55,924 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:55,924 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:55,924 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:55,924 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:55,924 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:55,925 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:55,925 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:55,925 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:55,925 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2019-11-25 08:47:55,925 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:55,925 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:55,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:55,932 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:55,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:55,935 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:55,977 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:55,978 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:55,983 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:55,983 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:55,986 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:55,986 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:55,990 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:55,990 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:55,992 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:55,993 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:56,000 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:56,000 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:56,003 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:56,004 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:56,008 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:56,008 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:56,016 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:56,016 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:56,926 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:56,928 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:56,928 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:56,928 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:56,928 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:56,929 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:56,929 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:56,929 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:56,929 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:56,929 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2019-11-25 08:47:56,929 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:56,929 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:56,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:56,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:56,932 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:56,935 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:56,983 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:56,983 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:56,989 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 [2019-11-25 08:47:56,990 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:56,991 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:56,991 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:56,991 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:56,991 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:56,991 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:56,992 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:56,993 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:56,996 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 [2019-11-25 08:47:56,997 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:56,997 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:56,997 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:56,997 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:56,998 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:56,998 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:56,998 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:56,999 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:57,003 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 [2019-11-25 08:47:57,004 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:57,005 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:57,005 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:57,005 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:57,005 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:57,005 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:57,006 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:57,007 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:57,011 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 [2019-11-25 08:47:57,012 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:57,012 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:57,013 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:57,013 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:57,013 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:57,014 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:57,014 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:57,016 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:57,018 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-25 08:47:57,018 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:57,022 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:57,022 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:57,023 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:57,023 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-25 08:47:57,024 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:47:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:57,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:47:57,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:57,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:57,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:57,138 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 [2019-11-25 08:47:57,138 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 590 states and 881 transitions. cyclomatic complexity: 301 Second operand 6 states. [2019-11-25 08:47:57,220 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 590 states and 881 transitions. cyclomatic complexity: 301. Second operand 6 states. Result 608 states and 900 transitions. Complement of second has 18 states. [2019-11-25 08:47:57,220 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 [2019-11-25 08:47:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:47:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-25 08:47:57,221 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-25 08:47:57,221 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:57,222 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:47:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:57,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:47:57,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:57,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:57,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:57,353 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 [2019-11-25 08:47:57,353 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 590 states and 881 transitions. cyclomatic complexity: 301 Second operand 6 states. [2019-11-25 08:47:57,455 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 590 states and 881 transitions. cyclomatic complexity: 301. Second operand 6 states. Result 838 states and 1222 transitions. Complement of second has 22 states. [2019-11-25 08:47:57,455 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 [2019-11-25 08:47:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:47:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-25 08:47:57,456 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-25 08:47:57,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:57,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2019-11-25 08:47:57,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:57,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 8 letters. [2019-11-25 08:47:57,458 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:57,458 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 838 states and 1222 transitions. [2019-11-25 08:47:57,468 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-25 08:47:57,485 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 838 states to 768 states and 1147 transitions. [2019-11-25 08:47:57,485 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 255 [2019-11-25 08:47:57,486 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 283 [2019-11-25 08:47:57,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 768 states and 1147 transitions. [2019-11-25 08:47:57,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:57,488 INFO L688 BuchiCegarLoop]: Abstraction has 768 states and 1147 transitions. [2019-11-25 08:47:57,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states and 1147 transitions. [2019-11-25 08:47:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 755. [2019-11-25 08:47:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2019-11-25 08:47:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1130 transitions. [2019-11-25 08:47:57,516 INFO L711 BuchiCegarLoop]: Abstraction has 755 states and 1130 transitions. [2019-11-25 08:47:57,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:47:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-25 08:47:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2019-11-25 08:47:57,518 INFO L87 Difference]: Start difference. First operand 755 states and 1130 transitions. Second operand 26 states. [2019-11-25 08:47:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:47:58,039 INFO L93 Difference]: Finished difference Result 855 states and 1274 transitions. [2019-11-25 08:47:58,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-25 08:47:58,040 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 855 states and 1274 transitions. [2019-11-25 08:47:58,049 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-25 08:47:58,060 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 855 states to 838 states and 1248 transitions. [2019-11-25 08:47:58,060 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 299 [2019-11-25 08:47:58,061 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 302 [2019-11-25 08:47:58,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 838 states and 1248 transitions. [2019-11-25 08:47:58,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:47:58,064 INFO L688 BuchiCegarLoop]: Abstraction has 838 states and 1248 transitions. [2019-11-25 08:47:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states and 1248 transitions. [2019-11-25 08:47:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 813. [2019-11-25 08:47:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2019-11-25 08:47:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1193 transitions. [2019-11-25 08:47:58,090 INFO L711 BuchiCegarLoop]: Abstraction has 813 states and 1193 transitions. [2019-11-25 08:47:58,090 INFO L591 BuchiCegarLoop]: Abstraction has 813 states and 1193 transitions. [2019-11-25 08:47:58,090 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-25 08:47:58,091 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 813 states and 1193 transitions. [2019-11-25 08:47:58,096 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-25 08:47:58,096 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:47:58,096 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:47:58,099 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 10, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:47:58,099 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:47:58,101 INFO L794 eck$LassoCheckResult]: Stem: 13937#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 13938#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 13947#fibonacciENTRY ~n := #in~n; 14064#L15 assume !(~n < 1); 14060#L17 assume !(1 == ~n); 14042#L20 call #t~ret0 := fibonacci(~n - 1);< 14053#fibonacciENTRY ~n := #in~n; 14423#L15 assume !(~n < 1); 14342#L17 assume !(1 == ~n); 14044#L20 call #t~ret0 := fibonacci(~n - 1);< 14045#fibonacciENTRY ~n := #in~n; 14147#L15 assume !(~n < 1); 14146#L17 assume !(1 == ~n); 14143#L20 call #t~ret0 := fibonacci(~n - 1);< 14145#fibonacciENTRY ~n := #in~n; 14268#L15 assume !(~n < 1); 14266#L17 assume !(1 == ~n); 14258#L20 call #t~ret0 := fibonacci(~n - 1);< 14265#fibonacciENTRY ~n := #in~n; 14263#L15 assume !(~n < 1); 14261#L17 assume !(1 == ~n); 14163#L20 call #t~ret0 := fibonacci(~n - 1);< 14259#fibonacciENTRY ~n := #in~n; 14348#L15 assume !(~n < 1); 14347#L17 assume !(1 == ~n); 14276#L20 call #t~ret0 := fibonacci(~n - 1);< 14345#fibonacciENTRY ~n := #in~n; 14372#L15 assume !(~n < 1); 14371#L17 assume !(1 == ~n); 14277#L20 call #t~ret0 := fibonacci(~n - 1);< 14370#fibonacciENTRY ~n := #in~n; 14427#L15 assume !(~n < 1); 14426#L17 assume 1 == ~n;#res := 1; 14425#fibonacciFINAL assume true; 14424#fibonacciEXIT >#28#return; 14414#L20-1 call #t~ret1 := fibonacci(~n - 2);< 14417#fibonacciENTRY ~n := #in~n; 14420#L15 assume ~n < 1;#res := 0; 14418#fibonacciFINAL assume true; 14413#fibonacciEXIT >#30#return; 14411#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 14410#fibonacciFINAL assume true; 14344#fibonacciEXIT >#28#return; 14270#L20-1 call #t~ret1 := fibonacci(~n - 2);< 14281#fibonacciENTRY ~n := #in~n; 14361#L15 assume !(~n < 1); 14368#L17 assume !(1 == ~n); 14048#L20 call #t~ret0 := fibonacci(~n - 1);< 14359#fibonacciENTRY ~n := #in~n; 14393#L15 assume !(~n < 1); 14392#L17 assume !(1 == ~n); 14029#L20 call #t~ret0 := fibonacci(~n - 1);< 14035#fibonacciENTRY ~n := #in~n; 14098#L15 assume !(~n < 1); 14097#L17 assume !(1 == ~n); 14032#L20 [2019-11-25 08:47:58,101 INFO L796 eck$LassoCheckResult]: Loop: 14032#L20 call #t~ret0 := fibonacci(~n - 1);< 14035#fibonacciENTRY ~n := #in~n; 14098#L15 assume !(~n < 1); 14097#L17 assume !(1 == ~n); 14032#L20 [2019-11-25 08:47:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash 439095810, now seen corresponding path program 4 times [2019-11-25 08:47:58,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:58,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729970138] [2019-11-25 08:47:58,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 205 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:47:58,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729970138] [2019-11-25 08:47:58,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408856216] [2019-11-25 08:47:58,449 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:47:58,477 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:47:58,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:47:58,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:47:58,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 95 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-25 08:47:58,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:47:58,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 28 [2019-11-25 08:47:58,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191114686] [2019-11-25 08:47:58,514 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:47:58,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:58,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1728010, now seen corresponding path program 4 times [2019-11-25 08:47:58,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:47:58,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53712472] [2019-11-25 08:47:58,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:47:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:47:58,518 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:47:58,552 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:58,552 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:58,552 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:58,552 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:58,553 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:47:58,553 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:58,553 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:58,553 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:58,553 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2019-11-25 08:47:58,553 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:58,553 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:58,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:58,556 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:58,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:58,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:58,606 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:58,606 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:58,609 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:58,609 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:58,612 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:58,612 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:58,616 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:58,616 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:58,618 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:58,619 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:58,624 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:58,624 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:58,626 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:47:58,627 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:58,631 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:47:58,631 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:47:58,639 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:47:58,639 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:47:59,546 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:47:59,549 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:47:59,549 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:47:59,549 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:47:59,549 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:47:59,549 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:47:59,549 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:59,549 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:47:59,549 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:47:59,549 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2019-11-25 08:47:59,550 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:47:59,550 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:47:59,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:59,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:59,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:59,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:47:59,624 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:47:59,624 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:47:59,632 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 [2019-11-25 08:47:59,634 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:59,634 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:59,634 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:59,634 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:59,634 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:59,635 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:59,635 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:59,636 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 63 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 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:59,642 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 [2019-11-25 08:47:59,644 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:59,644 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:59,644 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:59,644 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:59,644 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:59,644 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:59,644 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:59,645 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:59,650 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 [2019-11-25 08:47:59,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:47:59,651 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:47:59,651 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:47:59,651 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:47:59,651 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:47:59,653 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:47:59,653 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:47:59,659 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:47:59,663 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:47:59,663 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 65 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 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:47:59,666 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:47:59,666 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:47:59,666 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:47:59,666 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-25 08:47:59,668 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:47:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:59,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-25 08:47:59,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:59,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:59,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:59,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:47:59,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:47:59,808 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 [2019-11-25 08:47:59,808 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393 Second operand 6 states. [2019-11-25 08:47:59,867 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393. Second operand 6 states. Result 838 states and 1219 transitions. Complement of second has 18 states. [2019-11-25 08:47:59,867 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 [2019-11-25 08:47:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:47:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-25 08:47:59,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-25 08:47:59,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:47:59,869 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:47:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:47:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:47:59,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-25 08:47:59,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:47:59,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:59,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:47:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:00,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:48:00,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:00,034 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 [2019-11-25 08:48:00,034 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393 Second operand 6 states. [2019-11-25 08:48:00,122 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393. Second operand 6 states. Result 1019 states and 1430 transitions. Complement of second has 22 states. [2019-11-25 08:48:00,123 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 [2019-11-25 08:48:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:48:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-25 08:48:00,124 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-25 08:48:00,124 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:00,124 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:48:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:00,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-25 08:48:00,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:00,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:00,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:00,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:48:00,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:00,280 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 [2019-11-25 08:48:00,280 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393 Second operand 6 states. [2019-11-25 08:48:00,372 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393. Second operand 6 states. Result 1102 states and 1565 transitions. Complement of second has 27 states. [2019-11-25 08:48:00,372 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 [2019-11-25 08:48:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:48:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-25 08:48:00,373 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-25 08:48:00,374 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:00,374 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 59 letters. Loop has 4 letters. [2019-11-25 08:48:00,374 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:00,374 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 8 letters. [2019-11-25 08:48:00,375 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:00,375 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1102 states and 1565 transitions. [2019-11-25 08:48:00,385 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-25 08:48:00,395 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1102 states to 813 states and 1193 transitions. [2019-11-25 08:48:00,396 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-25 08:48:00,397 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 278 [2019-11-25 08:48:00,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 813 states and 1193 transitions. [2019-11-25 08:48:00,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:48:00,397 INFO L688 BuchiCegarLoop]: Abstraction has 813 states and 1193 transitions. [2019-11-25 08:48:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states and 1193 transitions. [2019-11-25 08:48:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2019-11-25 08:48:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2019-11-25 08:48:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1193 transitions. [2019-11-25 08:48:00,418 INFO L711 BuchiCegarLoop]: Abstraction has 813 states and 1193 transitions. [2019-11-25 08:48:00,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:00,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-25 08:48:00,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2019-11-25 08:48:00,419 INFO L87 Difference]: Start difference. First operand 813 states and 1193 transitions. Second operand 28 states. [2019-11-25 08:48:00,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:00,971 INFO L93 Difference]: Finished difference Result 387 states and 486 transitions. [2019-11-25 08:48:00,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-25 08:48:00,972 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 387 states and 486 transitions. [2019-11-25 08:48:00,975 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-25 08:48:00,979 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 387 states to 353 states and 450 transitions. [2019-11-25 08:48:00,979 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2019-11-25 08:48:00,979 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2019-11-25 08:48:00,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 353 states and 450 transitions. [2019-11-25 08:48:00,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:48:00,980 INFO L688 BuchiCegarLoop]: Abstraction has 353 states and 450 transitions. [2019-11-25 08:48:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states and 450 transitions. [2019-11-25 08:48:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 328. [2019-11-25 08:48:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2019-11-25 08:48:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 419 transitions. [2019-11-25 08:48:00,989 INFO L711 BuchiCegarLoop]: Abstraction has 328 states and 419 transitions. [2019-11-25 08:48:00,989 INFO L591 BuchiCegarLoop]: Abstraction has 328 states and 419 transitions. [2019-11-25 08:48:00,989 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-11-25 08:48:00,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 328 states and 419 transitions. [2019-11-25 08:48:00,991 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-25 08:48:00,991 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:00,991 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:00,992 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 11, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:48:00,992 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:48:00,993 INFO L794 eck$LassoCheckResult]: Stem: 19787#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 19788#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 19789#fibonacciENTRY ~n := #in~n; 19847#L15 assume !(~n < 1); 19846#L17 assume !(1 == ~n); 19842#L20 call #t~ret0 := fibonacci(~n - 1);< 19845#fibonacciENTRY ~n := #in~n; 19844#L15 assume !(~n < 1); 19843#L17 assume !(1 == ~n); 19838#L20 call #t~ret0 := fibonacci(~n - 1);< 19841#fibonacciENTRY ~n := #in~n; 19840#L15 assume !(~n < 1); 19839#L17 assume !(1 == ~n); 19834#L20 call #t~ret0 := fibonacci(~n - 1);< 19837#fibonacciENTRY ~n := #in~n; 19836#L15 assume !(~n < 1); 19835#L17 assume !(1 == ~n); 19830#L20 call #t~ret0 := fibonacci(~n - 1);< 19833#fibonacciENTRY ~n := #in~n; 19832#L15 assume !(~n < 1); 19831#L17 assume !(1 == ~n); 19826#L20 call #t~ret0 := fibonacci(~n - 1);< 19829#fibonacciENTRY ~n := #in~n; 19828#L15 assume !(~n < 1); 19827#L17 assume !(1 == ~n); 19820#L20 call #t~ret0 := fibonacci(~n - 1);< 19822#fibonacciENTRY ~n := #in~n; 19825#L15 assume !(~n < 1); 19824#L17 assume !(1 == ~n); 19819#L20 call #t~ret0 := fibonacci(~n - 1);< 19822#fibonacciENTRY ~n := #in~n; 19825#L15 assume !(~n < 1); 19824#L17 assume !(1 == ~n); 19819#L20 call #t~ret0 := fibonacci(~n - 1);< 19821#fibonacciENTRY ~n := #in~n; 20030#L15 assume !(~n < 1); 20029#L17 assume 1 == ~n;#res := 1; 20028#fibonacciFINAL assume true; 20025#fibonacciEXIT >#28#return; 20022#L20-1 call #t~ret1 := fibonacci(~n - 2);< 20024#fibonacciENTRY ~n := #in~n; 20039#L15 assume ~n < 1;#res := 0; 20036#fibonacciFINAL assume true; 20021#fibonacciEXIT >#30#return; 20020#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 20019#fibonacciFINAL assume true; 20013#fibonacciEXIT >#28#return; 19926#L20-1 call #t~ret1 := fibonacci(~n - 2);< 19929#fibonacciENTRY ~n := #in~n; 20016#L15 assume !(~n < 1); 20014#L17 assume !(1 == ~n); 20015#L20 call #t~ret0 := fibonacci(~n - 1);< 20052#fibonacciENTRY ~n := #in~n; 20063#L15 assume !(~n < 1); 20077#L17 assume !(1 == ~n); 19813#L20 call #t~ret0 := fibonacci(~n - 1);< 19817#fibonacciENTRY ~n := #in~n; 19818#L15 assume !(~n < 1); 20089#L17 assume !(1 == ~n); 19810#L20 [2019-11-25 08:48:00,993 INFO L796 eck$LassoCheckResult]: Loop: 19810#L20 call #t~ret0 := fibonacci(~n - 1);< 19817#fibonacciENTRY ~n := #in~n; 19818#L15 assume !(~n < 1); 20089#L17 assume !(1 == ~n); 19810#L20 [2019-11-25 08:48:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:00,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1106126005, now seen corresponding path program 5 times [2019-11-25 08:48:00,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:00,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681063503] [2019-11-25 08:48:00,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 195 proven. 65 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-25 08:48:01,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681063503] [2019-11-25 08:48:01,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528478169] [2019-11-25 08:48:01,303 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:01,340 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-25 08:48:01,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:01,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:48:01,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 142 proven. 11 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-25 08:48:01,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:01,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 25 [2019-11-25 08:48:01,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716327796] [2019-11-25 08:48:01,417 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:48:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1728010, now seen corresponding path program 5 times [2019-11-25 08:48:01,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:01,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022028291] [2019-11-25 08:48:01,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:01,420 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:01,460 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:48:01,460 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:48:01,460 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:48:01,460 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:48:01,460 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:48:01,461 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:01,461 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:48:01,461 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:48:01,461 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration10_Loop [2019-11-25 08:48:01,461 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:48:01,461 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:48:01,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:01,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:01,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:01,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:01,515 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:48:01,515 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:01,527 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:01,528 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 [2019-11-25 08:48:01,531 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:48:01,532 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:01,540 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:01,540 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:01,544 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:48:01,544 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:01,552 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:01,552 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:01,565 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:48:01,565 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,778 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:48:11,781 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:48:11,781 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:48:11,781 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:48:11,781 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:48:11,781 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:48:11,781 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,781 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:48:11,781 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:48:11,781 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration10_Loop [2019-11-25 08:48:11,781 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:48:11,781 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:48:11,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,784 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,826 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:48:11,826 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:48:11,829 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 [2019-11-25 08:48:11,830 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:11,830 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:48:11,830 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:11,831 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:11,831 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:11,831 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:48:11,831 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:48:11,832 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/z3 Starting monitored process 72 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 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,836 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 [2019-11-25 08:48:11,837 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:11,837 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:48:11,838 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:11,838 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:11,838 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:11,838 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:48:11,838 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:48:11,839 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:48:11,843 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 [2019-11-25 08:48:11,844 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:11,844 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:48:11,844 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:11,844 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:11,845 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:11,846 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:48:11,846 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:48:11,848 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:48:11,851 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:48:11,851 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a5fb241-fba8-4b09-828e-619ae29d159a/bin/uautomizer/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 [2019-11-25 08:48:11,854 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:48:11,854 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:48:11,854 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:48:11,854 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-25 08:48:11,855 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:48:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:11,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-25 08:48:11,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:11,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:11,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:11,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:48:11,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:11,985 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 [2019-11-25 08:48:11,985 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95 Second operand 6 states. [2019-11-25 08:48:12,031 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95. Second operand 6 states. Result 350 states and 442 transitions. Complement of second has 18 states. [2019-11-25 08:48:12,031 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 [2019-11-25 08:48:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:48:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-25 08:48:12,032 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 59 letters. Loop has 4 letters. [2019-11-25 08:48:12,032 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,032 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:48:12,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:12,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:12,165 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 [2019-11-25 08:48:12,165 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95 Second operand 6 states. [2019-11-25 08:48:12,234 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95. Second operand 6 states. Result 356 states and 448 transitions. Complement of second has 17 states. [2019-11-25 08:48:12,243 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 [2019-11-25 08:48:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:48:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-25 08:48:12,244 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 59 letters. Loop has 4 letters. [2019-11-25 08:48:12,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,244 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:48:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:12,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:48:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:12,401 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 [2019-11-25 08:48:12,402 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95 Second operand 6 states. [2019-11-25 08:48:12,476 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95. Second operand 6 states. Result 455 states and 575 transitions. Complement of second has 27 states. [2019-11-25 08:48:12,477 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 [2019-11-25 08:48:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:48:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-25 08:48:12,477 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 59 letters. Loop has 4 letters. [2019-11-25 08:48:12,478 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,478 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 63 letters. Loop has 4 letters. [2019-11-25 08:48:12,478 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,478 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 59 letters. Loop has 8 letters. [2019-11-25 08:48:12,479 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,479 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 455 states and 575 transitions. [2019-11-25 08:48:12,483 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-25 08:48:12,487 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 455 states to 336 states and 429 transitions. [2019-11-25 08:48:12,488 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 108 [2019-11-25 08:48:12,488 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 120 [2019-11-25 08:48:12,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 336 states and 429 transitions. [2019-11-25 08:48:12,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:48:12,488 INFO L688 BuchiCegarLoop]: Abstraction has 336 states and 429 transitions. [2019-11-25 08:48:12,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states and 429 transitions. [2019-11-25 08:48:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2019-11-25 08:48:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2019-11-25 08:48:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 419 transitions. [2019-11-25 08:48:12,499 INFO L711 BuchiCegarLoop]: Abstraction has 328 states and 419 transitions. [2019-11-25 08:48:12,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:12,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-25 08:48:12,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:48:12,500 INFO L87 Difference]: Start difference. First operand 328 states and 419 transitions. Second operand 25 states. [2019-11-25 08:48:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:13,051 INFO L93 Difference]: Finished difference Result 426 states and 559 transitions. [2019-11-25 08:48:13,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-25 08:48:13,052 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 426 states and 559 transitions. [2019-11-25 08:48:13,055 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-25 08:48:13,056 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 426 states to 0 states and 0 transitions. [2019-11-25 08:48:13,056 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-25 08:48:13,056 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-25 08:48:13,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-25 08:48:13,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:13,056 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:48:13,056 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:48:13,056 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:48:13,056 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-11-25 08:48:13,056 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:48:13,057 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-25 08:48:13,057 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-25 08:48:13,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 25.11 08:48:13 BoogieIcfgContainer [2019-11-25 08:48:13,078 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-25 08:48:13,079 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:48:13,079 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:48:13,079 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:48:13,080 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:47:45" (3/4) ... [2019-11-25 08:48:13,083 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-25 08:48:13,086 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:48:13,088 INFO L168 Benchmark]: Toolchain (without parser) took 28522.61 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 261.6 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -264.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:48:13,091 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:48:13,092 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -204.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:13,092 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:48:13,092 INFO L168 Benchmark]: Boogie Preprocessor took 18.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:48:13,092 INFO L168 Benchmark]: RCFGBuilder took 194.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:13,093 INFO L168 Benchmark]: BuchiAutomizer took 27958.73 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 102.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -80.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:13,093 INFO L168 Benchmark]: Witness Printer took 6.95 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 139.0 kB). Peak memory consumption was 139.0 kB. Max. memory is 11.5 GB. [2019-11-25 08:48:13,095 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 308.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 159.4 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -204.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.68 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 194.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 27958.73 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 102.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -80.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * Witness Printer took 6.95 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 139.0 kB). Peak memory consumption was 139.0 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 16 terminating modules (9 trivial, 3 deterministic, 4 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 9 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. 9 modules have a trivial ranking function, the largest among these consists of 28 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 27.8s and 11 iterations. TraceHistogramMax:13. Analysis of lassos took 19.7s. Construction of modules took 2.3s. Büchi inclusion checks took 4.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 328 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 813 states and ocurred in iteration 8. Nontrivial modules had stage [2, 1, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 20/46 HoareTripleCheckerStatistics: 324 SDtfs, 913 SDslu, 818 SDs, 0 SdLazy, 2689 SolverSat, 728 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 SILT6 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf97 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq186 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 18ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 14.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...