./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 f612eebc128d68e9b4bc81ed92184f640c3b9bd4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:00:24,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:00:24,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:00:24,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:00:24,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:00:24,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:00:24,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:00:24,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:00:24,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:00:24,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:00:24,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:00:24,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:00:24,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:00:24,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:00:24,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:00:24,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:00:24,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:00:24,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:00:24,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:00:24,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:00:24,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:00:24,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:00:24,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:00:24,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:00:24,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:00:24,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:00:24,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:00:24,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:00:24,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:00:24,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:00:24,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:00:24,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:00:24,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:00:24,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:00:24,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:00:24,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:00:24,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:00:24,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:00:24,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:00:24,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:00:24,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:00:24,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-10-22 09:00:24,873 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:00:24,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:00:24,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:00:24,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:00:24,875 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:00:24,875 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-10-22 09:00:24,875 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-10-22 09:00:24,875 INFO L138 SettingsManager]: * Use old map elimination=false [2019-10-22 09:00:24,876 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-10-22 09:00:24,876 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-10-22 09:00:24,876 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-10-22 09:00:24,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:00:24,876 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:00:24,876 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 09:00:24,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:00:24,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:00:24,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:00:24,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-10-22 09:00:24,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-10-22 09:00:24,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-10-22 09:00:24,877 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:00:24,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:00:24,878 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-10-22 09:00:24,878 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:00:24,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-10-22 09:00:24,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:00:24,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:00:24,879 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-10-22 09:00:24,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:00:24,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:00:24,887 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-10-22 09:00:24,887 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-10-22 09:00:24,888 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/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 -> f612eebc128d68e9b4bc81ed92184f640c3b9bd4 [2019-10-22 09:00:24,919 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:00:24,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:00:24,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:00:24,935 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:00:24,935 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:00:24,935 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2019-10-22 09:00:24,989 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/data/0387dd35b/cc46159055a543b1bb25c0ffc4993b65/FLAG58ae98632 [2019-10-22 09:00:25,379 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:00:25,380 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2019-10-22 09:00:25,385 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/data/0387dd35b/cc46159055a543b1bb25c0ffc4993b65/FLAG58ae98632 [2019-10-22 09:00:25,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/data/0387dd35b/cc46159055a543b1bb25c0ffc4993b65 [2019-10-22 09:00:25,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:00:25,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:00:25,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:25,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:00:25,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:00:25,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27536aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25, skipping insertion in model container [2019-10-22 09:00:25,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,415 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:00:25,429 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:00:25,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:25,567 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:00:25,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:25,686 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:00:25,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25 WrapperNode [2019-10-22 09:00:25,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:25,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:25,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:00:25,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:00:25,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:25,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:00:25,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:00:25,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:00:25,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... [2019-10-22 09:00:25,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:00:25,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:00:25,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:00:25,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:00:25,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:00:25,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:00:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-10-22 09:00:25,782 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-10-22 09:00:25,904 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:00:25,904 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 09:00:25,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:25 BoogieIcfgContainer [2019-10-22 09:00:25,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:00:25,907 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-10-22 09:00:25,907 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-10-22 09:00:25,910 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-10-22 09:00:25,911 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:00:25,911 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.10 09:00:25" (1/3) ... [2019-10-22 09:00:25,912 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@69864256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 09:00:25, skipping insertion in model container [2019-10-22 09:00:25,913 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:00:25,913 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:25" (2/3) ... [2019-10-22 09:00:25,913 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@69864256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 09:00:25, skipping insertion in model container [2019-10-22 09:00:25,913 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:00:25,913 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:25" (3/3) ... [2019-10-22 09:00:25,915 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_7-1.c [2019-10-22 09:00:25,968 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-10-22 09:00:25,969 INFO L357 BuchiCegarLoop]: Hoare is false [2019-10-22 09:00:25,969 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-10-22 09:00:25,969 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:00:25,969 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:00:25,969 INFO L361 BuchiCegarLoop]: Difference is false [2019-10-22 09:00:25,969 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:00:25,969 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-10-22 09:00:25,983 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-10-22 09:00:26,012 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 09:00:26,013 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:26,013 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:26,023 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-10-22 09:00:26,023 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 09:00:26,023 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-10-22 09:00:26,024 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-10-22 09:00:26,026 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 09:00:26,027 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:26,027 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:26,027 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-10-22 09:00:26,028 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 09:00:26,035 INFO L791 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-10-22 09:00:26,036 INFO L793 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-10-22 09:00:26,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:26,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-10-22 09:00:26,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:26,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274740879] [2019-10-22 09:00:26,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:26,153 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-10-22 09:00:26,157 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:26,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160091493] [2019-10-22 09:00:26,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,158 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:26,172 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-10-22 09:00:26,177 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:26,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835116914] [2019-10-22 09:00:26,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:26,192 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:26,307 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:26,307 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:26,308 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:26,308 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:26,308 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:26,308 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:26,308 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:26,308 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:26,308 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2019-10-22 09:00:26,308 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:26,309 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:26,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,328 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,403 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:26,403 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:26,412 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:26,412 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:26,417 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:26,418 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:26,423 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:26,423 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:26,427 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:26,427 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:26,438 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:26,439 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:26,442 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:26,442 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:26,453 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:26,453 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:26,456 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:26,457 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:26,462 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:26,462 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:26,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:26,473 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:26,484 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:00:26,488 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:26,488 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:26,488 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:26,488 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:26,488 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:00:26,489 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:26,489 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:26,489 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:26,489 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2019-10-22 09:00:26,489 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:26,489 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:26,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:26,661 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:26,666 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:00:26,667 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 [2019-10-22 09:00:26,668 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:26,668 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:26,669 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:26,669 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:26,669 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:26,671 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:26,671 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:26,675 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:26,675 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:00:26,676 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:26,676 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:26,676 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:26,676 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:26,677 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:26,677 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:26,677 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:26,678 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:26,679 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 [2019-10-22 09:00:26,680 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:26,680 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:26,680 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:26,680 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:26,680 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:26,680 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:26,681 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:26,681 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:26,682 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 [2019-10-22 09:00:26,682 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:26,682 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:26,682 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:26,682 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:26,683 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:26,683 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:26,683 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:26,686 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:26,686 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 [2019-10-22 09:00:26,687 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:26,687 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:26,687 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:26,688 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:26,688 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:26,688 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:26,689 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:26,696 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:00:26,705 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:00:26,706 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:00:26,710 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:00:26,710 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:00:26,710 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:00:26,711 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-10-22 09:00:26,713 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:00:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:26,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 09:00:26,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:26,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:26,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:26,819 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 [2019-10-22 09:00:26,821 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-10-22 09:00:26,939 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-10-22 09:00:26,940 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 [2019-10-22 09:00:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 09:00:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-10-22 09:00:26,945 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-10-22 09:00:26,946 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:26,946 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-10-22 09:00:26,946 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:26,947 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-10-22 09:00:26,947 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:26,948 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-10-22 09:00:26,952 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 09:00:26,962 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-10-22 09:00:26,963 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-10-22 09:00:26,963 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-10-22 09:00:26,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-10-22 09:00:26,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:26,966 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-10-22 09:00:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-10-22 09:00:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-10-22 09:00:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 09:00:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-10-22 09:00:26,995 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-10-22 09:00:26,995 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-10-22 09:00:26,995 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-10-22 09:00:26,995 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-10-22 09:00:26,996 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 09:00:26,996 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:26,996 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:26,997 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:26,997 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:26,998 INFO L791 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-10-22 09:00:26,998 INFO L793 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-10-22 09:00:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:26,998 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-10-22 09:00:26,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:26,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078031218] [2019-10-22 09:00:26,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:27,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078031218] [2019-10-22 09:00:27,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667903160] [2019-10-22 09:00:27,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:27,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:00:27,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:27,136 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:27,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-22 09:00:27,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859760547] [2019-10-22 09:00:27,138 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 09:00:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-10-22 09:00:27,139 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:27,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760801455] [2019-10-22 09:00:27,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:27,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:27,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:27,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760801455] [2019-10-22 09:00:27,188 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:27,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:00:27,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121914932] [2019-10-22 09:00:27,189 INFO L808 eck$LassoCheckResult]: loop already infeasible [2019-10-22 09:00:27,189 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:27,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:00:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:27,197 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-10-22 09:00:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:27,286 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-10-22 09:00:27,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:00:27,287 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-10-22 09:00:27,289 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 09:00:27,290 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-10-22 09:00:27,290 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-10-22 09:00:27,290 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-10-22 09:00:27,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-10-22 09:00:27,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:27,291 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-10-22 09:00:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-10-22 09:00:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 09:00:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 09:00:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-10-22 09:00:27,294 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-10-22 09:00:27,294 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-10-22 09:00:27,294 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-10-22 09:00:27,295 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-10-22 09:00:27,295 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-10-22 09:00:27,295 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:27,296 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:27,296 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:27,296 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:27,297 INFO L791 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-10-22 09:00:27,297 INFO L793 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-10-22 09:00:27,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:27,297 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-10-22 09:00:27,297 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:27,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505111390] [2019-10-22 09:00:27,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:27,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:27,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:27,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505111390] [2019-10-22 09:00:27,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498564596] [2019-10-22 09:00:27,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:27,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:00:27,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:27,382 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:27,383 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-22 09:00:27,383 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108532123] [2019-10-22 09:00:27,383 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 09:00:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-10-22 09:00:27,384 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:27,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396927932] [2019-10-22 09:00:27,384 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:27,384 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:27,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:27,394 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:27,484 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:27,484 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:27,485 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:27,485 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:27,485 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:27,485 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:27,485 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:27,485 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:27,485 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2019-10-22 09:00:27,485 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:27,486 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:27,487 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:27,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:27,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:27,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:27,536 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:27,536 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:27,549 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:27,549 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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) [2019-10-22 09:00:27,559 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:27,559 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:28,021 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:00:28,023 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:28,023 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:28,023 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:28,023 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:28,023 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:00:28,023 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:28,024 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:28,024 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:28,024 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2019-10-22 09:00:28,024 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:28,024 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:28,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:28,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:28,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:28,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:28,100 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:28,100 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:00:28,100 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 [2019-10-22 09:00:28,101 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:28,101 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:28,102 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:28,102 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:28,102 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:28,102 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:28,103 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:28,106 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:28,106 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 [2019-10-22 09:00:28,107 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:28,107 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:28,107 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:28,108 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:28,108 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:28,108 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:28,109 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:28,114 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:00:28,119 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:00:28,119 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:00:28,120 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:00:28,120 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:00:28,120 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:00:28,120 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-10-22 09:00:28,121 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:00:28,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:00:28,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:00:28,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:28,229 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-10-22 09:00:28,229 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-10-22 09:00:28,375 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-10-22 09:00:28,375 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 [2019-10-22 09:00:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 09:00:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-10-22 09:00:28,376 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-10-22 09:00:28,377 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:28,377 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-10-22 09:00:28,377 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:28,377 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-10-22 09:00:28,378 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:28,378 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-10-22 09:00:28,383 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-10-22 09:00:28,389 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-10-22 09:00:28,389 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-10-22 09:00:28,390 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-10-22 09:00:28,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-10-22 09:00:28,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:28,390 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-10-22 09:00:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-10-22 09:00:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-10-22 09:00:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-22 09:00:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-10-22 09:00:28,406 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-10-22 09:00:28,406 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:28,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:00:28,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:00:28,406 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-10-22 09:00:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:28,485 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-10-22 09:00:28,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:00:28,486 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-10-22 09:00:28,489 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-10-22 09:00:28,492 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-10-22 09:00:28,493 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-10-22 09:00:28,493 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-10-22 09:00:28,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-10-22 09:00:28,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:28,493 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-10-22 09:00:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-10-22 09:00:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-10-22 09:00:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-22 09:00:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-10-22 09:00:28,505 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-10-22 09:00:28,505 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-10-22 09:00:28,505 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-10-22 09:00:28,505 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-10-22 09:00:28,507 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-10-22 09:00:28,507 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:28,508 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:28,509 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:28,509 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-10-22 09:00:28,509 INFO L791 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-10-22 09:00:28,510 INFO L793 eck$LassoCheckResult]: Loop: 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume ~n < 1;#res := 0; 819#fiboFINAL assume true; 821#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-10-22 09:00:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:28,510 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-10-22 09:00:28,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:28,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731252452] [2019-10-22 09:00:28,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:28,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:28,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 09:00:28,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731252452] [2019-10-22 09:00:28,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685397187] [2019-10-22 09:00:28,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:00:28,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 09:00:28,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:28,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-22 09:00:28,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183810664] [2019-10-22 09:00:28,672 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 09:00:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-10-22 09:00:28,673 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:28,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654699725] [2019-10-22 09:00:28,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:28,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:28,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-22 09:00:28,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654699725] [2019-10-22 09:00:28,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162855751] [2019-10-22 09:00:28,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:28,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:00:28,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-22 09:00:28,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:28,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-10-22 09:00:28,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21201539] [2019-10-22 09:00:28,861 INFO L808 eck$LassoCheckResult]: loop already infeasible [2019-10-22 09:00:28,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:28,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:00:28,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:00:28,862 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-10-22 09:00:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:29,101 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-10-22 09:00:29,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 09:00:29,102 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-10-22 09:00:29,104 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-10-22 09:00:29,106 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-10-22 09:00:29,107 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-10-22 09:00:29,107 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-10-22 09:00:29,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-10-22 09:00:29,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:29,114 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-10-22 09:00:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-10-22 09:00:29,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-10-22 09:00:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-22 09:00:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-10-22 09:00:29,130 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-10-22 09:00:29,131 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-10-22 09:00:29,131 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-10-22 09:00:29,131 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-10-22 09:00:29,132 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-10-22 09:00:29,133 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:29,133 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:29,134 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:29,134 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-10-22 09:00:29,134 INFO L791 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-10-22 09:00:29,134 INFO L793 eck$LassoCheckResult]: Loop: 1260#L11-1 call #t~ret1 := fibo(~n - 2);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume 1 == ~n;#res := 1; 1254#fiboFINAL assume true; 1346#fiboEXIT >#32#return; 1252#L11-1 call #t~ret1 := fibo(~n - 2);< 1271#fiboENTRY ~n := #in~n; 1272#L6 assume ~n < 1;#res := 0; 1310#fiboFINAL assume true; 1347#fiboEXIT >#34#return; 1244#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-10-22 09:00:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:29,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-10-22 09:00:29,135 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:29,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465335300] [2019-10-22 09:00:29,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:29,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:29,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 09:00:29,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465335300] [2019-10-22 09:00:29,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458152471] [2019-10-22 09:00:29,253 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:29,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:29,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:29,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:00:29,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 09:00:29,310 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:29,310 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-22 09:00:29,310 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418624552] [2019-10-22 09:00:29,310 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 09:00:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:29,311 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-10-22 09:00:29,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:29,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428051525] [2019-10-22 09:00:29,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:29,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:29,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:29,321 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:29,534 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:29,534 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:29,534 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:29,534 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:29,534 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:29,534 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:29,534 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:29,534 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:29,534 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2019-10-22 09:00:29,534 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:29,534 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:29,535 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:29,537 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:29,545 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:29,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:29,597 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:29,597 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 15 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:29,602 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:29,602 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:29,604 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:29,605 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:29,609 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:29,609 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:29,611 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:29,611 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:29,619 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:29,619 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:29,621 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:29,621 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=1} Honda state: {fibo_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:29,625 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:29,625 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:29,633 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:29,633 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:30,077 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:00:30,079 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:30,079 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:30,079 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:30,079 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:30,079 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:00:30,079 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:30,079 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:30,079 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:30,079 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2019-10-22 09:00:30,079 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:30,079 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:30,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:30,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:30,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:30,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:30,144 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:30,144 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:00:30,145 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 [2019-10-22 09:00:30,145 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:30,145 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:30,145 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:30,146 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:30,146 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:30,146 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:30,146 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:30,147 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:30,147 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 [2019-10-22 09:00:30,148 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:30,148 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:30,148 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:30,148 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:30,148 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:30,149 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:30,149 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:30,149 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:30,150 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 [2019-10-22 09:00:30,150 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:30,150 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:30,150 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:30,150 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:30,150 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:30,151 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:30,151 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:30,154 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:00:30,163 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:00:30,163 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:00:30,163 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:00:30,163 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:00:30,164 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:00:30,164 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-10-22 09:00:30,164 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:00:30,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:30,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 09:00:30,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:30,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:30,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:30,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 09:00:30,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:00:30,321 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 [2019-10-22 09:00:30,321 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-10-22 09:00:30,533 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 182 states and 247 transitions. Complement of second has 33 states. [2019-10-22 09:00:30,535 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 [2019-10-22 09:00:30,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 09:00:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-10-22 09:00:30,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-10-22 09:00:30,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:30,536 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 09:00:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:30,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 09:00:30,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:30,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:30,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:30,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 09:00:30,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:00:30,675 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 [2019-10-22 09:00:30,676 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-10-22 09:00:30,807 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 307 states and 416 transitions. Complement of second has 25 states. [2019-10-22 09:00:30,809 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 [2019-10-22 09:00:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 09:00:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-10-22 09:00:30,810 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-10-22 09:00:30,811 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:30,811 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 09:00:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:30,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 09:00:30,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:30,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:30,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:30,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 09:00:30,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:00:30,942 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 [2019-10-22 09:00:30,942 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-10-22 09:00:31,160 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 1077 states and 1512 transitions. Complement of second has 130 states. [2019-10-22 09:00:31,163 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 [2019-10-22 09:00:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 09:00:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-10-22 09:00:31,164 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-10-22 09:00:31,165 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:31,165 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-10-22 09:00:31,166 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:31,166 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-10-22 09:00:31,168 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:31,168 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-10-22 09:00:31,191 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-10-22 09:00:31,217 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-10-22 09:00:31,217 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-10-22 09:00:31,218 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-10-22 09:00:31,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-10-22 09:00:31,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:31,222 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-10-22 09:00:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-10-22 09:00:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-10-22 09:00:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-10-22 09:00:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-10-22 09:00:31,285 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-10-22 09:00:31,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:31,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:00:31,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:00:31,286 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-10-22 09:00:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:31,581 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-10-22 09:00:31,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:00:31,582 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-10-22 09:00:31,589 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-10-22 09:00:31,597 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-10-22 09:00:31,598 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-10-22 09:00:31,598 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-10-22 09:00:31,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-10-22 09:00:31,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:31,599 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-10-22 09:00:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-10-22 09:00:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-10-22 09:00:31,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-10-22 09:00:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-10-22 09:00:31,626 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-10-22 09:00:31,627 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-10-22 09:00:31,627 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-10-22 09:00:31,627 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-10-22 09:00:31,630 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-10-22 09:00:31,630 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:31,630 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:31,631 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:31,632 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 09:00:31,632 INFO L791 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4845#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4953#fiboEXIT >#32#return; 4933#L11-1 call #t~ret1 := fibo(~n - 2);< 4941#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4957#L8 assume !(1 == ~n); 4958#L11 call #t~ret0 := fibo(~n - 1);< 4967#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-10-22 09:00:31,632 INFO L793 eck$LassoCheckResult]: Loop: 5054#fiboENTRY ~n := #in~n; 5065#L6 assume !(~n < 1); 5062#L8 assume !(1 == ~n); 5051#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-10-22 09:00:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-10-22 09:00:31,633 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:31,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166170907] [2019-10-22 09:00:31,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:31,633 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:31,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:31,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166170907] [2019-10-22 09:00:31,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052212711] [2019-10-22 09:00:31,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:31,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:00:31,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 09:00:31,873 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:31,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-10-22 09:00:31,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331884252] [2019-10-22 09:00:31,874 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 09:00:31,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:31,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-10-22 09:00:31,874 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:31,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098501147] [2019-10-22 09:00:31,874 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:31,874 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:31,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:31,885 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:31,922 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:31,922 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:31,922 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:31,922 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:31,922 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:31,923 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:31,923 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:31,923 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:31,923 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2019-10-22 09:00:31,923 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:31,923 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:31,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:31,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:31,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:31,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:31,932 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:31,956 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:31,956 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:31,963 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:31,964 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:31,966 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:31,966 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:31,970 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:31,971 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:31,973 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:31,973 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 23 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:31,981 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:31,981 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:31,983 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:31,983 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:31,988 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:31,988 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:31,995 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:31,995 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:32,030 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:00:32,032 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:32,033 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:32,033 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:32,033 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:32,033 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:00:32,033 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:32,033 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:32,033 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:32,033 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2019-10-22 09:00:32,033 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:32,033 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:32,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:32,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:32,037 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:32,039 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:32,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:32,077 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:32,077 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:00:32,077 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 [2019-10-22 09:00:32,078 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:32,078 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:32,078 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:32,078 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:32,078 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:32,079 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:32,079 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:32,079 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:32,080 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 [2019-10-22 09:00:32,080 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:32,080 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:32,080 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:32,080 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:32,080 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:32,081 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:32,081 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:32,081 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:32,081 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 [2019-10-22 09:00:32,082 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:32,082 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:32,082 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:32,082 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:32,082 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:32,083 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:32,083 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:32,083 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:32,083 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 [2019-10-22 09:00:32,084 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:32,084 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:32,084 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:32,084 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:32,084 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:32,085 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:32,085 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:32,086 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:00:32,087 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:00:32,087 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:00:32,088 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:00:32,088 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:00:32,088 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:00:32,088 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-10-22 09:00:32,088 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:00:32,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:00:32,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:32,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:32,174 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 [2019-10-22 09:00:32,174 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-10-22 09:00:32,235 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-10-22 09:00:32,236 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 [2019-10-22 09:00:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 09:00:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-10-22 09:00:32,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-10-22 09:00:32,237 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:32,237 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 09:00:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:00:32,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:32,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:32,323 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 [2019-10-22 09:00:32,323 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-10-22 09:00:32,380 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-10-22 09:00:32,381 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 [2019-10-22 09:00:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 09:00:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-10-22 09:00:32,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-10-22 09:00:32,382 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:32,382 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 09:00:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:00:32,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:32,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:32,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:32,471 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 [2019-10-22 09:00:32,471 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-10-22 09:00:32,546 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 650 states and 920 transitions. Complement of second has 14 states. [2019-10-22 09:00:32,546 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 [2019-10-22 09:00:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 09:00:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-10-22 09:00:32,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-10-22 09:00:32,547 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:32,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-10-22 09:00:32,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:32,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-10-22 09:00:32,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:32,548 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-10-22 09:00:32,555 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-10-22 09:00:32,561 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-10-22 09:00:32,562 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-10-22 09:00:32,562 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-10-22 09:00:32,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-10-22 09:00:32,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:32,563 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-10-22 09:00:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-10-22 09:00:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-10-22 09:00:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-10-22 09:00:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-10-22 09:00:32,578 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-10-22 09:00:32,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 09:00:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:00:32,579 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-10-22 09:00:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:32,829 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-10-22 09:00:32,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:00:32,829 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-10-22 09:00:32,835 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-10-22 09:00:32,842 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-10-22 09:00:32,842 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-10-22 09:00:32,842 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-10-22 09:00:32,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-10-22 09:00:32,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:32,843 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-10-22 09:00:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-10-22 09:00:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-10-22 09:00:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-10-22 09:00:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-10-22 09:00:32,858 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-10-22 09:00:32,858 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-10-22 09:00:32,858 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-10-22 09:00:32,858 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-10-22 09:00:32,862 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-10-22 09:00:32,862 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:32,862 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:32,863 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:32,863 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 09:00:32,863 INFO L791 eck$LassoCheckResult]: Stem: 8597#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 8598#L25 call main_#t~ret2 := fibo(main_~x~0);< 8631#fiboENTRY ~n := #in~n; 8671#L6 assume !(~n < 1); 8669#L8 assume !(1 == ~n); 8666#L11 call #t~ret0 := fibo(~n - 1);< 8667#fiboENTRY ~n := #in~n; 8677#L6 assume !(~n < 1); 8676#L8 assume !(1 == ~n); 8653#L11 call #t~ret0 := fibo(~n - 1);< 8675#fiboENTRY ~n := #in~n; 8679#L6 assume !(~n < 1); 8660#L8 assume !(1 == ~n); 8655#L11 call #t~ret0 := fibo(~n - 1);< 8657#fiboENTRY ~n := #in~n; 8711#L6 assume !(~n < 1); 8708#L8 assume !(1 == ~n); 8649#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8721#L6 assume !(~n < 1); 8710#L8 assume !(1 == ~n); 8648#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8730#L6 assume !(~n < 1); 8796#L8 assume 1 == ~n;#res := 1; 8794#fiboFINAL assume true; 8793#fiboEXIT >#32#return; 8785#L11-1 call #t~ret1 := fibo(~n - 2);< 8792#fiboENTRY ~n := #in~n; 9030#L6 assume !(~n < 1); 9006#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8639#fiboENTRY ~n := #in~n; 8640#L6 assume !(~n < 1); 9118#L8 assume !(1 == ~n); 8633#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-10-22 09:00:32,863 INFO L793 eck$LassoCheckResult]: Loop: 8634#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-10-22 09:00:32,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:32,863 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-10-22 09:00:32,863 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:32,864 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584699034] [2019-10-22 09:00:32,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:32,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:32,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:33,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584699034] [2019-10-22 09:00:33,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744437093] [2019-10-22 09:00:33,084 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:33,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:33,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:33,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 09:00:33,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-22 09:00:33,156 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:33,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2019-10-22 09:00:33,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436947023] [2019-10-22 09:00:33,156 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 09:00:33,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-10-22 09:00:33,157 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:33,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300542181] [2019-10-22 09:00:33,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:33,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:33,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:33,167 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:33,211 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:33,211 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:33,211 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:33,211 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:33,212 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:33,212 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:33,212 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:33,212 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:33,212 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2019-10-22 09:00:33,212 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:33,212 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:33,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:33,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:33,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:33,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:33,269 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:33,269 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:00:33,274 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:33,275 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:33,278 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:33,278 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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) [2019-10-22 09:00:33,285 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:33,285 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:33,288 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:33,288 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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) [2019-10-22 09:00:33,297 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:33,297 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:33,300 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:33,300 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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) [2019-10-22 09:00:33,306 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:33,307 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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) [2019-10-22 09:00:33,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:33,320 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:38,405 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:00:38,407 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:38,407 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:38,407 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:38,407 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:38,407 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:00:38,408 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:38,408 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:38,408 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:38,408 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2019-10-22 09:00:38,408 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:38,408 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:38,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:38,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:38,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:38,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:38,451 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:38,452 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:00:38,452 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 [2019-10-22 09:00:38,453 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:38,453 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:38,453 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:38,453 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:38,453 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:38,454 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:38,454 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:38,454 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:38,455 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 [2019-10-22 09:00:38,455 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:38,455 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:38,455 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:38,456 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:38,456 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:38,456 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:38,456 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:38,457 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:38,457 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 [2019-10-22 09:00:38,458 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:38,458 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:38,458 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:38,458 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:38,458 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:38,458 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:38,459 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:38,459 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:38,460 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 [2019-10-22 09:00:38,460 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:38,460 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:38,460 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:38,460 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:38,461 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:38,461 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:38,461 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:38,470 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:00:38,472 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:00:38,472 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:00:38,472 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:00:38,473 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:00:38,473 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:00:38,473 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-10-22 09:00:38,473 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:00:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 09:00:38,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:38,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:38,575 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 [2019-10-22 09:00:38,575 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-10-22 09:00:38,642 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 556 states and 823 transitions. Complement of second has 18 states. [2019-10-22 09:00:38,643 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 [2019-10-22 09:00:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-10-22 09:00:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-10-22 09:00:38,644 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-10-22 09:00:38,644 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:38,644 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 09:00:38,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 09:00:38,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:38,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:38,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:38,789 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 [2019-10-22 09:00:38,789 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-10-22 09:00:38,879 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 786 states and 1145 transitions. Complement of second has 22 states. [2019-10-22 09:00:38,880 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 [2019-10-22 09:00:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-10-22 09:00:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-10-22 09:00:38,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-10-22 09:00:38,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:38,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-10-22 09:00:38,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:38,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-10-22 09:00:38,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:38,882 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-10-22 09:00:38,889 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-10-22 09:00:38,897 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-10-22 09:00:38,897 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-10-22 09:00:38,898 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-10-22 09:00:38,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-10-22 09:00:38,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:38,898 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-10-22 09:00:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-10-22 09:00:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-10-22 09:00:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-10-22 09:00:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-10-22 09:00:38,918 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-10-22 09:00:38,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:38,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 09:00:38,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:00:38,919 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 23 states. [2019-10-22 09:00:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:39,527 INFO L93 Difference]: Finished difference Result 1715 states and 3613 transitions. [2019-10-22 09:00:39,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:00:39,528 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1715 states and 3613 transitions. [2019-10-22 09:00:39,552 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 156 [2019-10-22 09:00:39,585 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1715 states to 1469 states and 3094 transitions. [2019-10-22 09:00:39,585 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 506 [2019-10-22 09:00:39,586 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 533 [2019-10-22 09:00:39,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1469 states and 3094 transitions. [2019-10-22 09:00:39,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:39,587 INFO L688 BuchiCegarLoop]: Abstraction has 1469 states and 3094 transitions. [2019-10-22 09:00:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states and 3094 transitions. [2019-10-22 09:00:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1302. [2019-10-22 09:00:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-10-22 09:00:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-10-22 09:00:39,642 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-10-22 09:00:39,642 INFO L591 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-10-22 09:00:39,642 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-10-22 09:00:39,643 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1302 states and 2622 transitions. [2019-10-22 09:00:39,651 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-10-22 09:00:39,651 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:39,651 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:39,652 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:39,653 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 09:00:39,653 INFO L791 eck$LassoCheckResult]: Stem: 13394#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 13395#L25 call main_#t~ret2 := fibo(main_~x~0);< 13452#fiboENTRY ~n := #in~n; 13490#L6 assume !(~n < 1); 13489#L8 assume !(1 == ~n); 13485#L11 call #t~ret0 := fibo(~n - 1);< 13488#fiboENTRY ~n := #in~n; 13487#L6 assume !(~n < 1); 13486#L8 assume !(1 == ~n); 13481#L11 call #t~ret0 := fibo(~n - 1);< 13484#fiboENTRY ~n := #in~n; 13483#L6 assume !(~n < 1); 13482#L8 assume !(1 == ~n); 13477#L11 call #t~ret0 := fibo(~n - 1);< 13480#fiboENTRY ~n := #in~n; 13479#L6 assume !(~n < 1); 13478#L8 assume !(1 == ~n); 13434#L11 call #t~ret0 := fibo(~n - 1);< 13476#fiboENTRY ~n := #in~n; 13474#L6 assume !(~n < 1); 13475#L8 assume !(1 == ~n); 13435#L11 call #t~ret0 := fibo(~n - 1);< 13470#fiboENTRY ~n := #in~n; 13471#L6 assume !(~n < 1); 13473#L8 assume !(1 == ~n); 13436#L11 call #t~ret0 := fibo(~n - 1);< 13518#fiboENTRY ~n := #in~n; 13536#L6 assume !(~n < 1); 13533#L8 assume 1 == ~n;#res := 1; 13530#fiboFINAL assume true; 13526#fiboEXIT >#32#return; 13449#L11-1 call #t~ret1 := fibo(~n - 2);< 13469#fiboENTRY ~n := #in~n; 13448#L6 assume ~n < 1;#res := 0; 13450#fiboFINAL assume true; 14576#fiboEXIT >#34#return; 14572#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 14571#fiboFINAL assume true; 14570#fiboEXIT >#32#return; 14476#L11-1 call #t~ret1 := fibo(~n - 2);< 14494#fiboENTRY ~n := #in~n; 14568#L6 assume !(~n < 1); 14567#L8 assume !(1 == ~n); 13467#L11 call #t~ret0 := fibo(~n - 1);< 14099#fiboENTRY ~n := #in~n; 14098#L6 assume !(~n < 1); 14097#L8 assume !(1 == ~n); 13381#L11 call #t~ret0 := fibo(~n - 1);< 13599#fiboENTRY ~n := #in~n; 14077#L6 assume !(~n < 1); 14075#L8 assume !(1 == ~n); 13383#L11 [2019-10-22 09:00:39,653 INFO L793 eck$LassoCheckResult]: Loop: 13383#L11 call #t~ret0 := fibo(~n - 1);< 13599#fiboENTRY ~n := #in~n; 14077#L6 assume !(~n < 1); 14075#L8 assume !(1 == ~n); 13383#L11 [2019-10-22 09:00:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-10-22 09:00:39,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:39,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10141195] [2019-10-22 09:00:39,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:39,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:39,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 129 proven. 47 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-22 09:00:39,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10141195] [2019-10-22 09:00:39,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788124824] [2019-10-22 09:00:39,824 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:39,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-22 09:00:39,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:39,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:00:39,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-22 09:00:39,919 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:39,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 22 [2019-10-22 09:00:39,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469672407] [2019-10-22 09:00:39,920 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 09:00:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-10-22 09:00:39,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:39,920 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222556584] [2019-10-22 09:00:39,920 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:39,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:39,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:39,931 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:39,972 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:39,972 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:39,973 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:39,973 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:39,973 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:39,973 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:39,973 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:39,973 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:39,973 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2019-10-22 09:00:39,973 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:39,973 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:39,974 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:39,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:39,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:39,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:40,015 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:40,016 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:40,019 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:40,020 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_52af9561-cdb4-4bff-8209-360075842c3c/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 [2019-10-22 09:00:40,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:40,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:42,461 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:00:42,463 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:42,463 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:42,463 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:42,463 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:42,463 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:00:42,464 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:42,464 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:42,464 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:42,464 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2019-10-22 09:00:42,464 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:42,464 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:42,465 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:42,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:42,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:42,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:42,509 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:42,509 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:00:42,509 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 [2019-10-22 09:00:42,510 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:42,510 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:42,510 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:42,510 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:42,510 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:42,510 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:42,510 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:42,511 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:42,511 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 [2019-10-22 09:00:42,512 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:42,512 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:42,512 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:42,512 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:42,512 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:42,513 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:42,513 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:42,513 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:42,513 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 [2019-10-22 09:00:42,514 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:42,514 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:42,514 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:42,514 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:42,514 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:42,515 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:42,515 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:42,516 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:42,516 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 [2019-10-22 09:00:42,517 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:42,517 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:42,517 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:42,517 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:42,517 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:42,518 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:42,518 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:42,520 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:00:42,522 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:00:42,522 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:00:42,522 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:00:42,522 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:00:42,522 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:00:42,522 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-10-22 09:00:42,523 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:00:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 09:00:42,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:42,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:42,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:42,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:42,648 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 [2019-10-22 09:00:42,648 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-10-22 09:00:42,712 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1324 states and 2645 transitions. Complement of second has 18 states. [2019-10-22 09:00:42,713 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 [2019-10-22 09:00:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-10-22 09:00:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-10-22 09:00:42,713 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-10-22 09:00:42,713 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:42,713 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 09:00:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 09:00:42,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:42,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:42,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:42,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:42,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:42,834 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 [2019-10-22 09:00:42,835 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-10-22 09:00:42,936 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1505 states and 2854 transitions. Complement of second has 22 states. [2019-10-22 09:00:42,937 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 [2019-10-22 09:00:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-10-22 09:00:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-10-22 09:00:42,937 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-10-22 09:00:42,937 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:42,937 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 09:00:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 09:00:43,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:43,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:43,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:43,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:43,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:43,065 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 [2019-10-22 09:00:43,065 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-10-22 09:00:43,175 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1635 states and 3078 transitions. Complement of second has 27 states. [2019-10-22 09:00:43,176 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 [2019-10-22 09:00:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-10-22 09:00:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-10-22 09:00:43,177 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-10-22 09:00:43,177 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:43,177 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-10-22 09:00:43,178 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:43,178 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-10-22 09:00:43,178 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:43,179 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1635 states and 3078 transitions. [2019-10-22 09:00:43,197 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-10-22 09:00:43,225 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1635 states to 1302 states and 2622 transitions. [2019-10-22 09:00:43,225 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 411 [2019-10-22 09:00:43,226 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 447 [2019-10-22 09:00:43,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1302 states and 2622 transitions. [2019-10-22 09:00:43,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:43,227 INFO L688 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-10-22 09:00:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states and 2622 transitions. [2019-10-22 09:00:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2019-10-22 09:00:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-10-22 09:00:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-10-22 09:00:43,274 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-10-22 09:00:43,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:43,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 09:00:43,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:00:43,274 INFO L87 Difference]: Start difference. First operand 1302 states and 2622 transitions. Second operand 22 states. [2019-10-22 09:00:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:43,604 INFO L93 Difference]: Finished difference Result 400 states and 513 transitions. [2019-10-22 09:00:43,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 09:00:43,604 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 400 states and 513 transitions. [2019-10-22 09:00:43,607 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 09:00:43,608 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 400 states to 0 states and 0 transitions. [2019-10-22 09:00:43,608 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-10-22 09:00:43,608 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-10-22 09:00:43,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-10-22 09:00:43,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 09:00:43,608 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:00:43,608 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:00:43,608 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:00:43,608 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-10-22 09:00:43,608 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:00:43,608 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 09:00:43,609 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-10-22 09:00:43,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.10 09:00:43 BoogieIcfgContainer [2019-10-22 09:00:43,616 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-10-22 09:00:43,616 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:00:43,616 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:00:43,617 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:00:43,617 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:25" (3/4) ... [2019-10-22 09:00:43,628 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 09:00:43,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:00:43,630 INFO L168 Benchmark]: Toolchain (without parser) took 18229.39 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 366.0 MB). Free memory was 951.2 MB in the beginning and 1.3 GB in the end (delta: -301.3 MB). Peak memory consumption was 64.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:43,631 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:00:43,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 189.3 MB). Free memory was 951.2 MB in the beginning and 1.2 GB in the end (delta: -232.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:43,632 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.38 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. [2019-10-22 09:00:43,633 INFO L168 Benchmark]: Boogie Preprocessor took 13.99 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. [2019-10-22 09:00:43,633 INFO L168 Benchmark]: RCFGBuilder took 171.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:43,633 INFO L168 Benchmark]: BuchiAutomizer took 17709.33 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 176.7 MB). Free memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: -87.4 MB). Peak memory consumption was 89.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:43,634 INFO L168 Benchmark]: Witness Printer took 12.00 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 553.2 kB). Peak memory consumption was 553.2 kB. Max. memory is 11.5 GB. [2019-10-22 09:00:43,636 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 285.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 189.3 MB). Free memory was 951.2 MB in the beginning and 1.2 GB in the end (delta: -232.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.38 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 13.99 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 171.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 17709.33 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 176.7 MB). Free memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: -87.4 MB). Peak memory consumption was 89.3 MB. Max. memory is 11.5 GB. * Witness Printer took 12.00 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 553.2 kB). Peak memory consumption was 553.2 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 13 terminating modules (7 trivial, 3 deterministic, 3 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 7 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 17.6s and 9 iterations. TraceHistogramMax:11. Analysis of lassos took 12.0s. Construction of modules took 1.5s. Büchi inclusion checks took 3.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 12. Automata minimization 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 442 StatesRemovedByMinimization, 9 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 1302 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 242 SDtfs, 659 SDslu, 475 SDs, 0 SdLazy, 1881 SolverSat, 522 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf98 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp78 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...