./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 dd317ac0ecdb37853dacea373914a521115465e0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 16:05:19,847 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 16:05:19,848 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 16:05:19,855 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 16:05:19,855 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 16:05:19,856 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 16:05:19,856 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 16:05:19,857 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 16:05:19,858 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 16:05:19,859 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 16:05:19,860 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 16:05:19,860 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 16:05:19,861 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 16:05:19,862 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 16:05:19,862 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 16:05:19,863 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 16:05:19,863 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 16:05:19,865 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 16:05:19,866 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 16:05:19,867 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 16:05:19,868 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 16:05:19,869 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 16:05:19,871 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 16:05:19,871 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 16:05:19,871 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 16:05:19,872 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 16:05:19,873 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 16:05:19,874 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 16:05:19,874 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 16:05:19,875 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 16:05:19,875 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 16:05:19,876 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 16:05:19,876 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 16:05:19,876 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 16:05:19,877 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 16:05:19,878 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 16:05:19,878 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-23 16:05:19,889 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 16:05:19,889 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 16:05:19,890 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 16:05:19,891 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 16:05:19,891 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 16:05:19,891 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 16:05:19,891 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 16:05:19,891 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 16:05:19,891 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 16:05:19,891 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 16:05:19,892 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 16:05:19,892 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 16:05:19,892 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 16:05:19,892 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 16:05:19,892 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 16:05:19,892 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 16:05:19,892 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 16:05:19,892 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 16:05:19,892 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 16:05:19,892 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 16:05:19,893 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 16:05:19,893 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 16:05:19,893 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 16:05:19,893 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 16:05:19,893 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 16:05:19,893 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 16:05:19,893 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 16:05:19,893 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 16:05:19,893 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 16:05:19,893 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 16:05:19,894 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 16:05:19,894 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 16:05:19,894 INFO L133 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 -> dd317ac0ecdb37853dacea373914a521115465e0 [2018-11-23 16:05:19,917 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 16:05:19,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 16:05:19,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 16:05:19,927 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 16:05:19,927 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 16:05:19,928 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-23 16:05:19,962 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/data/8c03291e7/fd01805e5c404848a4f89b1d3e409cc4/FLAGcaed8b330 [2018-11-23 16:05:20,374 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 16:05:20,375 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-23 16:05:20,380 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/data/8c03291e7/fd01805e5c404848a4f89b1d3e409cc4/FLAGcaed8b330 [2018-11-23 16:05:20,390 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/data/8c03291e7/fd01805e5c404848a4f89b1d3e409cc4 [2018-11-23 16:05:20,393 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 16:05:20,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 16:05:20,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 16:05:20,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 16:05:20,397 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 16:05:20,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc0002c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20, skipping insertion in model container [2018-11-23 16:05:20,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 16:05:20,420 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 16:05:20,534 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 16:05:20,536 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 16:05:20,544 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 16:05:20,552 INFO L195 MainTranslator]: Completed translation [2018-11-23 16:05:20,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20 WrapperNode [2018-11-23 16:05:20,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 16:05:20,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 16:05:20,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 16:05:20,553 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 16:05:20,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 16:05:20,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 16:05:20,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 16:05:20,570 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 16:05:20,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... [2018-11-23 16:05:20,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 16:05:20,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 16:05:20,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 16:05:20,580 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 16:05:20,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:20,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 16:05:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 16:05:20,655 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-23 16:05:20,655 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-23 16:05:20,732 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 16:05:20,732 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-23 16:05:20,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:05:20 BoogieIcfgContainer [2018-11-23 16:05:20,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 16:05:20,733 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 16:05:20,733 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 16:05:20,735 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 16:05:20,736 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 16:05:20,736 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 04:05:20" (1/3) ... [2018-11-23 16:05:20,736 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1fe93c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 04:05:20, skipping insertion in model container [2018-11-23 16:05:20,737 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 16:05:20,737 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:05:20" (2/3) ... [2018-11-23 16:05:20,737 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1fe93c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 04:05:20, skipping insertion in model container [2018-11-23 16:05:20,737 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 16:05:20,737 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:05:20" (3/3) ... [2018-11-23 16:05:20,738 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_10_true-unreach-call_true-termination.c [2018-11-23 16:05:20,777 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 16:05:20,778 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 16:05:20,778 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 16:05:20,778 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 16:05:20,778 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 16:05:20,778 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 16:05:20,778 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 16:05:20,778 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 16:05:20,778 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 16:05:20,787 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 16:05:20,805 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 16:05:20,805 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:20,805 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:20,810 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 16:05:20,810 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 16:05:20,810 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 16:05:20,810 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 16:05:20,811 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 16:05:20,811 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:20,811 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:20,812 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 16:05:20,812 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 16:05:20,817 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-11-23 16:05:20,817 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2018-11-23 16:05:20,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-11-23 16:05:20,822 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:20,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:20,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:20,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:20,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:20,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:20,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-11-23 16:05:20,894 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:20,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:20,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:20,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:20,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:20,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-11-23 16:05:20,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:20,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:20,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:20,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:20,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:20,991 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:20,991 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:20,992 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:20,992 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:20,992 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 16:05:20,992 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:20,992 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:20,992 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:20,992 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 16:05:20,993 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:20,993 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:21,010 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,124 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:21,126 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:21,129 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:21,130 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:21,137 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 16:05:21,137 INFO L448 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:21,153 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:21,153 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:21,156 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 16:05:21,156 INFO L448 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:21,180 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:21,180 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:21,183 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 16:05:21,183 INFO L448 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:21,204 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:21,205 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:21,207 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 16:05:21,207 INFO L448 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:21,222 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:21,222 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:21,239 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 16:05:21,239 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:21,256 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 16:05:21,257 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:21,257 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:21,258 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:21,258 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:21,258 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 16:05:21,258 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:21,258 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:21,258 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:21,258 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 16:05:21,258 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:21,258 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:21,259 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,261 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,306 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:21,310 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 16:05:21,312 INFO L122 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 [2018-11-23 16:05:21,313 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:21,313 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:21,314 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:21,314 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:21,314 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:21,316 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:21,316 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:21,319 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:21,320 INFO L122 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 [2018-11-23 16:05:21,320 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:21,320 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:21,320 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:21,320 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:21,321 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:21,321 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:21,321 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:21,322 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:21,323 INFO L122 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 [2018-11-23 16:05:21,323 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:21,323 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:21,323 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:21,324 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:21,324 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:21,324 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:21,324 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:21,325 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:21,326 INFO L122 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 [2018-11-23 16:05:21,326 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:21,326 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:21,326 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:21,326 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:21,327 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:21,327 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:21,327 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:21,328 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:21,329 INFO L122 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 [2018-11-23 16:05:21,329 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:21,329 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:21,330 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:21,330 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:21,330 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:21,330 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:21,331 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:21,336 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 16:05:21,339 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 16:05:21,339 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 16:05:21,341 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 16:05:21,341 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 16:05:21,341 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 16:05:21,341 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 16:05:21,342 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 16:05:21,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:21,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:21,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:21,440 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 [2018-11-23 16:05:21,441 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-11-23 16:05:21,544 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. [2018-11-23 16:05:21,544 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 [2018-11-23 16:05:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 16:05:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-23 16:05:21,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-11-23 16:05:21,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:21,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-11-23 16:05:21,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:21,549 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-23 16:05:21,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:21,549 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-11-23 16:05:21,553 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 16:05:21,559 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-11-23 16:05:21,560 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-23 16:05:21,560 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-23 16:05:21,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-11-23 16:05:21,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:21,562 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-11-23 16:05:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-11-23 16:05:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-11-23 16:05:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 16:05:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-11-23 16:05:21,581 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 16:05:21,581 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 16:05:21,581 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 16:05:21,581 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-11-23 16:05:21,582 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 16:05:21,582 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:21,582 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:21,583 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 16:05:21,583 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 16:05:21,583 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-11-23 16:05:21,583 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2018-11-23 16:05:21,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-11-23 16:05:21,584 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:21,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:21,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:21,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:21,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 16:05:21,664 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 16:05:21,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 16:05:21,666 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 16:05:21,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:21,666 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-11-23 16:05:21,666 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:21,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:21,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:21,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:21,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 16:05:21,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 16:05:21,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 16:05:21,707 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 16:05:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 16:05:21,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 16:05:21,710 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-23 16:05:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 16:05:21,780 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-11-23 16:05:21,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 16:05:21,781 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-11-23 16:05:21,783 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 16:05:21,784 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-11-23 16:05:21,784 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-11-23 16:05:21,784 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-11-23 16:05:21,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-11-23 16:05:21,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:21,786 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 16:05:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-11-23 16:05:21,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-23 16:05:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 16:05:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-11-23 16:05:21,789 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 16:05:21,789 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 16:05:21,789 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 16:05:21,789 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-11-23 16:05:21,790 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 16:05:21,790 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:21,790 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:21,791 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 16:05:21,791 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 16:05:21,791 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-11-23 16:05:21,791 INFO L796 eck$LassoCheckResult]: Loop: 182#L11-1 call #t~ret1 := fibo(~n - 2);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume !(1 == ~n); 193#L11 call #t~ret0 := fibo(~n - 1);< 195#fiboENTRY ~n := #in~n; 202#L6 assume !(~n < 1); 201#L8 assume 1 == ~n;#res := 1; 199#fiboFINAL assume true; 197#fiboEXIT >#32#return; 182#L11-1 [2018-11-23 16:05:21,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-11-23 16:05:21,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:21,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:21,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:21,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:21,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:21,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 16:05:21,847 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 16:05:21,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:21,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:21,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 16:05:21,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 16:05:21,883 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 16:05:21,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:21,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-11-23 16:05:21,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:21,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:21,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:21,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:21,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:21,989 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:21,989 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:21,989 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:21,989 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:21,989 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 16:05:21,989 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:21,989 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:21,989 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:21,990 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 16:05:21,990 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:21,990 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:21,991 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:21,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:22,001 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:22,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:22,031 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:22,031 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:22,035 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:22,036 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:22,052 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 16:05:22,052 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:22,561 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 16:05:22,562 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:22,563 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:22,563 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:22,563 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:22,563 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 16:05:22,563 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:22,563 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:22,563 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:22,563 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 16:05:22,564 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:22,564 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:22,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:22,573 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:22,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:22,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:22,673 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:22,673 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 16:05:22,674 INFO L122 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 [2018-11-23 16:05:22,674 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:22,675 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:22,675 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:22,675 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:22,676 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:22,676 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:22,676 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:22,678 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:22,679 INFO L122 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 [2018-11-23 16:05:22,679 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:22,679 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:22,679 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:22,680 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:22,680 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:22,680 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:22,680 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:22,685 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 16:05:22,688 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 16:05:22,689 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 16:05:22,689 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 16:05:22,689 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 16:05:22,689 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 16:05:22,690 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 16:05:22,690 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 16:05:22,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:22,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:22,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:22,779 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 [2018-11-23 16:05:22,779 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-23 16:05:22,884 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. [2018-11-23 16:05:22,885 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 [2018-11-23 16:05:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 16:05:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 16:05:22,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-11-23 16:05:22,886 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:22,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-11-23 16:05:22,886 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:22,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-11-23 16:05:22,887 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:22,887 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-11-23 16:05:22,890 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 16:05:22,893 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-11-23 16:05:22,893 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-11-23 16:05:22,894 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 16:05:22,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-11-23 16:05:22,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:22,894 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-11-23 16:05:22,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-11-23 16:05:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-11-23 16:05:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 16:05:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-11-23 16:05:22,902 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-11-23 16:05:22,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 16:05:22,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 16:05:22,903 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-11-23 16:05:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 16:05:22,957 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-11-23 16:05:22,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 16:05:22,958 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-11-23 16:05:22,960 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 16:05:22,962 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-11-23 16:05:22,962 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-11-23 16:05:22,962 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 16:05:22,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-11-23 16:05:22,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:22,962 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-11-23 16:05:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-11-23 16:05:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-11-23 16:05:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 16:05:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-11-23 16:05:22,968 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 16:05:22,968 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 16:05:22,968 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 16:05:22,969 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-11-23 16:05:22,970 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 16:05:22,970 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:22,970 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:22,970 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 16:05:22,970 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 16:05:22,971 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 704#L25 call main_#t~ret2 := fibo(main_~x~0);< 726#fiboENTRY ~n := #in~n; 748#L6 assume !(~n < 1); 707#L8 assume !(1 == ~n); 708#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 719#L6 assume !(~n < 1); 728#L8 assume !(1 == ~n); 718#L11 call #t~ret0 := fibo(~n - 1);< 717#fiboENTRY ~n := #in~n; 720#L6 assume !(~n < 1); 752#L8 assume 1 == ~n;#res := 1; 751#fiboFINAL assume true; 750#fiboEXIT >#32#return; 710#L11-1 call #t~ret1 := fibo(~n - 2);< 749#fiboENTRY ~n := #in~n; 777#L6 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 773#fiboEXIT >#34#return; 772#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 771#fiboFINAL assume true; 759#fiboEXIT >#32#return; 760#L11-1 [2018-11-23 16:05:22,971 INFO L796 eck$LassoCheckResult]: Loop: 760#L11-1 call #t~ret1 := fibo(~n - 2);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume !(1 == ~n); 763#L11 call #t~ret0 := fibo(~n - 1);< 766#fiboENTRY ~n := #in~n; 775#L6 assume !(~n < 1); 768#L8 assume 1 == ~n;#res := 1; 769#fiboFINAL assume true; 770#fiboEXIT >#32#return; 760#L11-1 [2018-11-23 16:05:22,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:22,971 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-11-23 16:05:22,971 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:22,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:22,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:22,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:22,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 16:05:23,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 16:05:23,022 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 16:05:23,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:23,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 16:05:23,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 16:05:23,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 16:05:23,064 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 16:05:23,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:23,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-11-23 16:05:23,064 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:23,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:23,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:23,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:23,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:23,133 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:23,133 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:23,133 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:23,133 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:23,133 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 16:05:23,134 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:23,134 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:23,134 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:23,134 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 16:05:23,134 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:23,134 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:23,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:23,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:23,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:23,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:23,163 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:23,164 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:23,165 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:23,165 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:23,183 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 16:05:23,183 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:23,682 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 16:05:23,684 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:23,684 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:23,684 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:23,684 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:23,685 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 16:05:23,685 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:23,685 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:23,685 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:23,685 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 16:05:23,685 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:23,685 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:23,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:23,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:23,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:23,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:23,715 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:23,715 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 16:05:23,715 INFO L122 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 [2018-11-23 16:05:23,716 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:23,716 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:23,716 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:23,716 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:23,716 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:23,716 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:23,717 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:23,717 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:23,718 INFO L122 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 [2018-11-23 16:05:23,718 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:23,718 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:23,718 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:23,719 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:23,719 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:23,719 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:23,719 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:23,720 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:23,720 INFO L122 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 [2018-11-23 16:05:23,720 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:23,721 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:23,721 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:23,721 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:23,721 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:23,721 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:23,722 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:23,723 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:23,723 INFO L122 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 [2018-11-23 16:05:23,724 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:23,724 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:23,724 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:23,724 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:23,724 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:23,725 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:23,725 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:23,738 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 16:05:23,741 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 16:05:23,741 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 16:05:23,742 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 16:05:23,742 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 16:05:23,742 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 16:05:23,742 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 16:05:23,742 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 16:05:23,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:23,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:23,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:23,828 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 [2018-11-23 16:05:23,828 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 16:05:23,924 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 162 states and 216 transitions. Complement of second has 25 states. [2018-11-23 16:05:23,925 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 [2018-11-23 16:05:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 16:05:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 16:05:23,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 16:05:23,926 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:23,926 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:23,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:23,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:23,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:24,013 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-23 16:05:24,013 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 16:05:24,093 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 287 states and 386 transitions. Complement of second has 25 states. [2018-11-23 16:05:24,095 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 [2018-11-23 16:05:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 16:05:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-11-23 16:05:24,095 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 16:05:24,096 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:24,096 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:24,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:24,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:24,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:24,178 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 5 loop predicates [2018-11-23 16:05:24,179 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 16:05:24,288 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 825 states and 1090 transitions. Complement of second has 112 states. [2018-11-23 16:05:24,290 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 [2018-11-23 16:05:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 16:05:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-11-23 16:05:24,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 16:05:24,291 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:24,291 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-11-23 16:05:24,291 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:24,291 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-11-23 16:05:24,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:24,292 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-11-23 16:05:24,302 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 16:05:24,310 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-11-23 16:05:24,311 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-23 16:05:24,311 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-11-23 16:05:24,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-11-23 16:05:24,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:24,312 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-11-23 16:05:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-11-23 16:05:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-11-23 16:05:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-23 16:05:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-11-23 16:05:24,340 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-11-23 16:05:24,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 16:05:24,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 16:05:24,341 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-11-23 16:05:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 16:05:24,460 INFO L93 Difference]: Finished difference Result 497 states and 785 transitions. [2018-11-23 16:05:24,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 16:05:24,461 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 785 transitions. [2018-11-23 16:05:24,468 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 16:05:24,476 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 782 transitions. [2018-11-23 16:05:24,476 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-11-23 16:05:24,477 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-23 16:05:24,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 782 transitions. [2018-11-23 16:05:24,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:24,478 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 782 transitions. [2018-11-23 16:05:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 782 transitions. [2018-11-23 16:05:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 369. [2018-11-23 16:05:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-11-23 16:05:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 522 transitions. [2018-11-23 16:05:24,497 INFO L728 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-23 16:05:24,497 INFO L608 BuchiCegarLoop]: Abstraction has 369 states and 522 transitions. [2018-11-23 16:05:24,497 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 16:05:24,497 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 369 states and 522 transitions. [2018-11-23 16:05:24,500 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 16:05:24,500 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:24,500 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:24,501 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-23 16:05:24,501 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 16:05:24,501 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3588#fiboENTRY ~n := #in~n; 3605#L6 assume !(~n < 1); 3604#L8 assume !(1 == ~n); 3599#L11 call #t~ret0 := fibo(~n - 1);< 3603#fiboENTRY ~n := #in~n; 3601#L6 assume !(~n < 1); 3602#L8 assume !(1 == ~n); 3557#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3600#L8 assume !(1 == ~n); 3556#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3597#L6 assume !(~n < 1); 3555#L8 assume 1 == ~n;#res := 1; 3558#fiboFINAL assume true; 3677#fiboEXIT >#32#return; 3622#L11-1 call #t~ret1 := fibo(~n - 2);< 3623#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3660#L8 assume !(1 == ~n); 3662#L11 call #t~ret0 := fibo(~n - 1);< 3873#fiboENTRY ~n := #in~n; 3888#L6 assume !(~n < 1); 3886#L8 assume !(1 == ~n); 3594#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-11-23 16:05:24,501 INFO L796 eck$LassoCheckResult]: Loop: 3591#fiboENTRY ~n := #in~n; 3595#L6 assume !(~n < 1); 3615#L8 assume !(1 == ~n); 3592#L11 call #t~ret0 := fibo(~n - 1);< 3591#fiboENTRY [2018-11-23 16:05:24,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-11-23 16:05:24,501 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:24,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:24,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:24,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 16:05:24,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-23 16:05:24,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 16:05:24,537 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 16:05:24,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:24,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 16:05:24,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 16:05:24,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-23 16:05:24,678 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 16:05:24,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:24,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-11-23 16:05:24,678 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:24,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:24,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:24,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 16:05:24,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:24,717 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:24,718 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:24,718 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:24,718 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:24,718 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 16:05:24,718 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:24,718 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:24,718 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:24,718 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 16:05:24,718 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:24,718 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:24,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,721 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,748 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:24,748 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:24,750 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:24,750 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:24,752 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 16:05:24,752 INFO L448 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:24,767 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:24,767 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:24,784 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 16:05:24,784 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:24,801 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 16:05:24,802 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:24,802 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:24,802 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:24,802 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:24,802 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 16:05:24,803 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:24,803 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:24,803 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:24,803 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 16:05:24,803 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:24,803 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:24,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:24,835 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:24,836 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 16:05:24,836 INFO L122 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 [2018-11-23 16:05:24,836 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:24,836 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:24,837 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:24,837 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:24,837 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:24,837 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:24,837 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:24,839 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 16:05:24,840 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 16:05:24,840 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 16:05:24,840 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 16:05:24,840 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 16:05:24,841 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 16:05:24,841 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 16:05:24,841 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 16:05:24,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:24,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:24,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:24,914 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 [2018-11-23 16:05:24,915 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 16:05:24,954 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-11-23 16:05:24,955 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 [2018-11-23 16:05:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 16:05:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 16:05:24,956 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 16:05:24,956 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:24,956 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:24,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:25,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:25,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:25,060 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 [2018-11-23 16:05:25,060 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 16:05:25,108 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 379 states and 532 transitions. Complement of second has 13 states. [2018-11-23 16:05:25,109 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 [2018-11-23 16:05:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 16:05:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 16:05:25,109 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 16:05:25,109 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:25,109 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:25,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:25,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:25,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:25,161 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 [2018-11-23 16:05:25,161 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-23 16:05:25,218 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 369 states and 522 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 494 states and 656 transitions. Complement of second has 14 states. [2018-11-23 16:05:25,219 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 [2018-11-23 16:05:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 16:05:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-11-23 16:05:25,220 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 16:05:25,221 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:25,221 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-11-23 16:05:25,221 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:25,221 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-11-23 16:05:25,221 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:25,221 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 494 states and 656 transitions. [2018-11-23 16:05:25,227 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 16:05:25,231 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 494 states to 407 states and 567 transitions. [2018-11-23 16:05:25,231 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-11-23 16:05:25,232 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 162 [2018-11-23 16:05:25,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 407 states and 567 transitions. [2018-11-23 16:05:25,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:25,232 INFO L705 BuchiCegarLoop]: Abstraction has 407 states and 567 transitions. [2018-11-23 16:05:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states and 567 transitions. [2018-11-23 16:05:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2018-11-23 16:05:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2018-11-23 16:05:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 546 transitions. [2018-11-23 16:05:25,244 INFO L728 BuchiCegarLoop]: Abstraction has 393 states and 546 transitions. [2018-11-23 16:05:25,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 16:05:25,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-11-23 16:05:25,245 INFO L87 Difference]: Start difference. First operand 393 states and 546 transitions. Second operand 14 states. [2018-11-23 16:05:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 16:05:25,415 INFO L93 Difference]: Finished difference Result 274 states and 348 transitions. [2018-11-23 16:05:25,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 16:05:25,416 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 274 states and 348 transitions. [2018-11-23 16:05:25,419 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:25,421 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 274 states to 244 states and 313 transitions. [2018-11-23 16:05:25,422 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 119 [2018-11-23 16:05:25,422 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 122 [2018-11-23 16:05:25,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 244 states and 313 transitions. [2018-11-23 16:05:25,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:25,422 INFO L705 BuchiCegarLoop]: Abstraction has 244 states and 313 transitions. [2018-11-23 16:05:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states and 313 transitions. [2018-11-23 16:05:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 203. [2018-11-23 16:05:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-23 16:05:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-23 16:05:25,430 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 16:05:25,430 INFO L608 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 16:05:25,430 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 16:05:25,430 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 203 states and 260 transitions. [2018-11-23 16:05:25,431 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:25,431 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:25,431 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:25,432 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 16:05:25,432 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 16:05:25,433 INFO L794 eck$LassoCheckResult]: Stem: 6303#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 6304#L25 call main_#t~ret2 := fibo(main_~x~0);< 6333#fiboENTRY ~n := #in~n; 6400#L6 assume !(~n < 1); 6399#L8 assume !(1 == ~n); 6395#L11 call #t~ret0 := fibo(~n - 1);< 6398#fiboENTRY ~n := #in~n; 6397#L6 assume !(~n < 1); 6396#L8 assume !(1 == ~n); 6390#L11 call #t~ret0 := fibo(~n - 1);< 6394#fiboENTRY ~n := #in~n; 6392#L6 assume !(~n < 1); 6393#L8 assume !(1 == ~n); 6323#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6389#L6 assume !(~n < 1); 6391#L8 assume !(1 == ~n); 6324#L11 call #t~ret0 := fibo(~n - 1);< 6388#fiboENTRY ~n := #in~n; 6384#L6 assume !(~n < 1); 6385#L8 assume 1 == ~n;#res := 1; 6497#fiboFINAL assume true; 6496#fiboEXIT >#32#return; 6298#L11-1 call #t~ret1 := fibo(~n - 2);< 6318#fiboENTRY ~n := #in~n; 6319#L6 assume ~n < 1;#res := 0; 6499#fiboFINAL assume true; 6297#fiboEXIT >#34#return; 6299#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 6471#fiboFINAL assume true; 6470#fiboEXIT >#32#return; 6330#L11-1 call #t~ret1 := fibo(~n - 2);< 6401#fiboENTRY ~n := #in~n; 6404#L6 assume !(~n < 1); 6484#L8 assume !(1 == ~n); 6306#L11 call #t~ret0 := fibo(~n - 1);< 6327#fiboENTRY ~n := #in~n; 6380#L6 assume !(~n < 1); 6370#L8 assume !(1 == ~n); 6352#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-11-23 16:05:25,433 INFO L796 eck$LassoCheckResult]: Loop: 6350#L11 call #t~ret0 := fibo(~n - 1);< 6353#fiboENTRY ~n := #in~n; 6367#L6 assume !(~n < 1); 6365#L8 assume !(1 == ~n); 6350#L11 [2018-11-23 16:05:25,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1642551253, now seen corresponding path program 2 times [2018-11-23 16:05:25,433 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:25,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:25,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:25,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 16:05:25,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-23 16:05:25,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 16:05:25,512 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 16:05:25,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 16:05:25,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 16:05:25,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 16:05:25,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-23 16:05:25,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 16:05:25,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-11-23 16:05:25,678 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 16:05:25,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2018-11-23 16:05:25,678 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:25,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:25,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:25,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 16:05:25,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:25,710 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:25,710 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:25,710 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:25,710 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:25,710 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 16:05:25,710 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:25,710 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:25,710 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:25,710 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration6_Loop [2018-11-23 16:05:25,710 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:25,710 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:25,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:25,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:25,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:25,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:25,737 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:25,737 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:25,740 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:25,740 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:25,743 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 16:05:25,743 INFO L448 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:25,759 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:25,759 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:25,778 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 16:05:25,778 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:31,240 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 16:05:31,242 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:31,242 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:31,242 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:31,242 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:31,242 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 16:05:31,242 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:31,243 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:31,243 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:31,243 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration6_Loop [2018-11-23 16:05:31,243 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:31,243 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:31,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:31,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:31,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:31,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:31,270 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:31,270 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 16:05:31,271 INFO L122 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 [2018-11-23 16:05:31,271 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:31,271 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:31,271 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:31,271 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:31,271 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:31,272 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:31,272 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:31,274 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 16:05:31,275 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 16:05:31,275 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 16:05:31,275 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 16:05:31,275 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 16:05:31,276 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 16:05:31,276 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 16:05:31,276 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 16:05:31,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:31,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:31,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:31,368 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 [2018-11-23 16:05:31,368 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 16:05:31,402 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 215 states and 273 transitions. Complement of second has 18 states. [2018-11-23 16:05:31,403 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 [2018-11-23 16:05:31,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 16:05:31,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 16:05:31,404 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:31,404 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:31,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:31,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:31,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:31,507 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 [2018-11-23 16:05:31,507 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 16:05:31,565 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 221 states and 279 transitions. Complement of second has 17 states. [2018-11-23 16:05:31,566 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 [2018-11-23 16:05:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 16:05:31,567 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 16:05:31,567 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:31,567 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:31,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:31,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:31,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:31,665 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 [2018-11-23 16:05:31,666 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-23 16:05:31,710 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 203 states and 260 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 271 states and 343 transitions. Complement of second has 27 states. [2018-11-23 16:05:31,711 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 [2018-11-23 16:05:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 16:05:31,712 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 4 letters. [2018-11-23 16:05:31,712 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:31,712 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2018-11-23 16:05:31,712 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:31,713 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 47 letters. Loop has 8 letters. [2018-11-23 16:05:31,713 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:31,713 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 271 states and 343 transitions. [2018-11-23 16:05:31,716 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:31,718 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 271 states to 207 states and 265 transitions. [2018-11-23 16:05:31,718 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 79 [2018-11-23 16:05:31,718 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2018-11-23 16:05:31,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 265 transitions. [2018-11-23 16:05:31,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:31,718 INFO L705 BuchiCegarLoop]: Abstraction has 207 states and 265 transitions. [2018-11-23 16:05:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states and 265 transitions. [2018-11-23 16:05:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-11-23 16:05:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-23 16:05:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 260 transitions. [2018-11-23 16:05:31,723 INFO L728 BuchiCegarLoop]: Abstraction has 203 states and 260 transitions. [2018-11-23 16:05:31,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 16:05:31,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-11-23 16:05:31,724 INFO L87 Difference]: Start difference. First operand 203 states and 260 transitions. Second operand 20 states. [2018-11-23 16:05:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 16:05:31,980 INFO L93 Difference]: Finished difference Result 341 states and 458 transitions. [2018-11-23 16:05:31,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-23 16:05:31,981 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 341 states and 458 transitions. [2018-11-23 16:05:31,984 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:31,988 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 341 states to 315 states and 426 transitions. [2018-11-23 16:05:31,989 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2018-11-23 16:05:31,989 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-11-23 16:05:31,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 315 states and 426 transitions. [2018-11-23 16:05:31,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:31,989 INFO L705 BuchiCegarLoop]: Abstraction has 315 states and 426 transitions. [2018-11-23 16:05:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states and 426 transitions. [2018-11-23 16:05:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 282. [2018-11-23 16:05:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-11-23 16:05:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 383 transitions. [2018-11-23 16:05:31,997 INFO L728 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-11-23 16:05:31,997 INFO L608 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-11-23 16:05:31,997 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-23 16:05:31,997 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 282 states and 383 transitions. [2018-11-23 16:05:31,998 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:31,998 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:31,998 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:31,999 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2018-11-23 16:05:32,000 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 16:05:32,000 INFO L794 eck$LassoCheckResult]: Stem: 8505#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 8506#L25 call main_#t~ret2 := fibo(main_~x~0);< 8545#fiboENTRY ~n := #in~n; 8605#L6 assume !(~n < 1); 8603#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8601#fiboENTRY ~n := #in~n; 8616#L6 assume !(~n < 1); 8614#L8 assume !(1 == ~n); 8610#L11 call #t~ret0 := fibo(~n - 1);< 8613#fiboENTRY ~n := #in~n; 8668#L6 assume !(~n < 1); 8665#L8 assume !(1 == ~n); 8607#L11 call #t~ret0 := fibo(~n - 1);< 8611#fiboENTRY ~n := #in~n; 8629#L6 assume !(~n < 1); 8626#L8 assume !(1 == ~n); 8532#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8725#L6 assume !(~n < 1); 8723#L8 assume !(1 == ~n); 8533#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8725#L6 assume !(~n < 1); 8723#L8 assume !(1 == ~n); 8533#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8725#L6 assume !(~n < 1); 8723#L8 assume !(1 == ~n); 8533#L11 call #t~ret0 := fibo(~n - 1);< 8539#fiboENTRY ~n := #in~n; 8727#L6 assume !(~n < 1); 8772#L8 assume 1 == ~n;#res := 1; 8771#fiboFINAL assume true; 8770#fiboEXIT >#32#return; 8531#L11-1 call #t~ret1 := fibo(~n - 2);< 8534#fiboENTRY ~n := #in~n; 8766#L6 assume ~n < 1;#res := 0; 8765#fiboFINAL assume true; 8760#fiboEXIT >#34#return; 8758#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8756#fiboFINAL assume true; 8750#fiboEXIT >#32#return; 8740#L11-1 call #t~ret1 := fibo(~n - 2);< 8743#fiboENTRY ~n := #in~n; 8769#L6 assume !(~n < 1); 8768#L8 assume 1 == ~n;#res := 1; 8550#fiboFINAL assume true; 8739#fiboEXIT >#34#return; 8737#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8735#fiboFINAL assume true; 8733#fiboEXIT >#32#return; 8549#L11-1 call #t~ret1 := fibo(~n - 2);< 8621#fiboENTRY ~n := #in~n; 8557#L6 assume !(~n < 1); 8546#L8 assume !(1 == ~n); 8496#L11 call #t~ret0 := fibo(~n - 1);< 8528#fiboENTRY ~n := #in~n; 8529#L6 assume !(~n < 1); 8513#L8 assume !(1 == ~n); 8514#L11 call #t~ret0 := fibo(~n - 1);< 8562#fiboENTRY ~n := #in~n; 8580#L6 assume !(~n < 1); 8579#L8 assume !(1 == ~n); 8560#L11 [2018-11-23 16:05:32,000 INFO L796 eck$LassoCheckResult]: Loop: 8560#L11 call #t~ret0 := fibo(~n - 1);< 8562#fiboENTRY ~n := #in~n; 8580#L6 assume !(~n < 1); 8579#L8 assume !(1 == ~n); 8560#L11 [2018-11-23 16:05:32,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:32,000 INFO L82 PathProgramCache]: Analyzing trace with hash 973756610, now seen corresponding path program 3 times [2018-11-23 16:05:32,000 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:32,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:32,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:32,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 16:05:32,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-11-23 16:05:32,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 16:05:32,056 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 16:05:32,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 16:05:32,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-23 16:05:32,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 16:05:32,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-11-23 16:05:32,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 16:05:32,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-23 16:05:32,095 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 16:05:32,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:32,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2018-11-23 16:05:32,096 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:32,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:32,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:32,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 16:05:32,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:32,119 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:32,119 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:32,119 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:32,119 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:32,119 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 16:05:32,119 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:32,119 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:32,119 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:32,119 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration7_Loop [2018-11-23 16:05:32,119 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:32,119 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:32,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:32,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:32,126 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:32,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:32,150 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:32,150 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:32,152 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:32,152 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:32,154 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 16:05:32,154 INFO L448 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:32,169 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:32,169 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:32,187 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 16:05:32,187 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:32,964 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 16:05:32,965 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:32,966 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:32,966 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:32,966 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:32,966 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 16:05:32,966 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:32,966 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:32,966 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:32,966 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration7_Loop [2018-11-23 16:05:32,966 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:32,966 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:32,967 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:32,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:32,974 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:32,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:32,998 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:32,998 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 16:05:32,998 INFO L122 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 [2018-11-23 16:05:32,998 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:32,998 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:32,999 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:32,999 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:32,999 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:32,999 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:32,999 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:32,999 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:32,999 INFO L122 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 [2018-11-23 16:05:33,000 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:33,000 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:33,000 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:33,000 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:33,000 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:33,000 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:33,000 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:33,001 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 16:05:33,002 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 16:05:33,002 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 16:05:33,002 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 16:05:33,002 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 16:05:33,003 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 16:05:33,003 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 16:05:33,003 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 16:05:33,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:33,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:33,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:33,103 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 [2018-11-23 16:05:33,103 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-11-23 16:05:33,134 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 297 states and 399 transitions. Complement of second has 18 states. [2018-11-23 16:05:33,134 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 [2018-11-23 16:05:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 16:05:33,134 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 16:05:33,134 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:33,134 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:33,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:33,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:33,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:33,231 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 [2018-11-23 16:05:33,232 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-11-23 16:05:33,281 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 303 states and 405 transitions. Complement of second has 17 states. [2018-11-23 16:05:33,285 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 [2018-11-23 16:05:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 16:05:33,285 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 16:05:33,286 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:33,286 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:33,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:33,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:33,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:33,381 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 [2018-11-23 16:05:33,381 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105 Second operand 6 states. [2018-11-23 16:05:33,416 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 282 states and 383 transitions. cyclomatic complexity: 105. Second operand 6 states. Result 361 states and 481 transitions. Complement of second has 27 states. [2018-11-23 16:05:33,421 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 [2018-11-23 16:05:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 16:05:33,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 4 letters. [2018-11-23 16:05:33,422 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:33,422 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 68 letters. Loop has 4 letters. [2018-11-23 16:05:33,423 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:33,423 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 64 letters. Loop has 8 letters. [2018-11-23 16:05:33,423 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:33,423 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 361 states and 481 transitions. [2018-11-23 16:05:33,426 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:33,429 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 361 states to 286 states and 388 transitions. [2018-11-23 16:05:33,429 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2018-11-23 16:05:33,429 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 128 [2018-11-23 16:05:33,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 286 states and 388 transitions. [2018-11-23 16:05:33,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:33,430 INFO L705 BuchiCegarLoop]: Abstraction has 286 states and 388 transitions. [2018-11-23 16:05:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states and 388 transitions. [2018-11-23 16:05:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2018-11-23 16:05:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-11-23 16:05:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 383 transitions. [2018-11-23 16:05:33,438 INFO L728 BuchiCegarLoop]: Abstraction has 282 states and 383 transitions. [2018-11-23 16:05:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 16:05:33,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-23 16:05:33,439 INFO L87 Difference]: Start difference. First operand 282 states and 383 transitions. Second operand 11 states. [2018-11-23 16:05:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 16:05:33,544 INFO L93 Difference]: Finished difference Result 399 states and 573 transitions. [2018-11-23 16:05:33,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 16:05:33,544 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 399 states and 573 transitions. [2018-11-23 16:05:33,546 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:33,550 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 399 states to 377 states and 547 transitions. [2018-11-23 16:05:33,551 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 180 [2018-11-23 16:05:33,551 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 192 [2018-11-23 16:05:33,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 377 states and 547 transitions. [2018-11-23 16:05:33,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:33,551 INFO L705 BuchiCegarLoop]: Abstraction has 377 states and 547 transitions. [2018-11-23 16:05:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states and 547 transitions. [2018-11-23 16:05:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 320. [2018-11-23 16:05:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-11-23 16:05:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 462 transitions. [2018-11-23 16:05:33,561 INFO L728 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-11-23 16:05:33,561 INFO L608 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-11-23 16:05:33,561 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-23 16:05:33,561 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 320 states and 462 transitions. [2018-11-23 16:05:33,563 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:33,563 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:33,563 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:33,565 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [17, 15, 12, 11, 9, 5, 5, 4, 4, 3, 2, 1, 1] [2018-11-23 16:05:33,565 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 16:05:33,565 INFO L794 eck$LassoCheckResult]: Stem: 11349#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 11350#L25 call main_#t~ret2 := fibo(main_~x~0);< 11387#fiboENTRY ~n := #in~n; 11464#L6 assume !(~n < 1); 11462#L8 assume !(1 == ~n); 11459#L11 call #t~ret0 := fibo(~n - 1);< 11460#fiboENTRY ~n := #in~n; 11474#L6 assume !(~n < 1); 11472#L8 assume !(1 == ~n); 11469#L11 call #t~ret0 := fibo(~n - 1);< 11470#fiboENTRY ~n := #in~n; 11482#L6 assume !(~n < 1); 11481#L8 assume !(1 == ~n); 11466#L11 call #t~ret0 := fibo(~n - 1);< 11480#fiboENTRY ~n := #in~n; 11489#L6 assume !(~n < 1); 11486#L8 assume !(1 == ~n); 11406#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11490#L6 assume !(~n < 1); 11487#L8 assume !(1 == ~n); 11405#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11490#L6 assume !(~n < 1); 11487#L8 assume !(1 == ~n); 11405#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11490#L6 assume !(~n < 1); 11487#L8 assume !(1 == ~n); 11405#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11490#L6 assume !(~n < 1); 11487#L8 assume !(1 == ~n); 11405#L11 call #t~ret0 := fibo(~n - 1);< 11484#fiboENTRY ~n := #in~n; 11493#L6 assume !(~n < 1); 11611#L8 assume 1 == ~n;#res := 1; 11610#fiboFINAL assume true; 11608#fiboEXIT >#32#return; 11605#L11-1 call #t~ret1 := fibo(~n - 2);< 11606#fiboENTRY ~n := #in~n; 11609#L6 assume ~n < 1;#res := 0; 11607#fiboFINAL assume true; 11604#fiboEXIT >#34#return; 11602#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 11601#fiboFINAL assume true; 11599#fiboEXIT >#32#return; 11578#L11-1 call #t~ret1 := fibo(~n - 2);< 11580#fiboENTRY ~n := #in~n; 11595#L6 assume !(~n < 1); 11594#L8 assume 1 == ~n;#res := 1; 11492#fiboFINAL assume true; 11577#fiboEXIT >#34#return; 11574#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 11563#fiboFINAL assume true; 11558#fiboEXIT >#32#return; 11559#L11-1 call #t~ret1 := fibo(~n - 2);< 11562#fiboENTRY ~n := #in~n; 11596#L6 assume !(~n < 1); 11592#L8 assume !(1 == ~n); 11593#L11 call #t~ret0 := fibo(~n - 1);< 11619#fiboENTRY ~n := #in~n; 11622#L6 assume !(~n < 1); 11621#L8 assume 1 == ~n;#res := 1; 11620#fiboFINAL assume true; 11617#fiboEXIT >#32#return; 11569#L11-1 call #t~ret1 := fibo(~n - 2);< 11571#fiboENTRY ~n := #in~n; 11582#L6 assume ~n < 1;#res := 0; 11581#fiboFINAL assume true; 11568#fiboEXIT >#34#return; 11567#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 11565#fiboFINAL assume true; 11560#fiboEXIT >#34#return; 11478#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 11485#fiboFINAL assume true; 11475#fiboEXIT >#32#return; 11397#L11-1 call #t~ret1 := fibo(~n - 2);< 11402#fiboENTRY ~n := #in~n; 11395#L6 assume !(~n < 1); 11399#L8 assume !(1 == ~n); 11357#L11 call #t~ret0 := fibo(~n - 1);< 11618#fiboENTRY ~n := #in~n; 11623#L6 assume !(~n < 1); 11354#L8 assume !(1 == ~n); 11358#L11 call #t~ret0 := fibo(~n - 1);< 11383#fiboENTRY ~n := #in~n; 11660#L6 assume !(~n < 1); 11652#L8 assume !(1 == ~n); 11630#L11 [2018-11-23 16:05:33,565 INFO L796 eck$LassoCheckResult]: Loop: 11630#L11 call #t~ret0 := fibo(~n - 1);< 11383#fiboENTRY ~n := #in~n; 11660#L6 assume !(~n < 1); 11652#L8 assume !(1 == ~n); 11630#L11 [2018-11-23 16:05:33,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash -789040214, now seen corresponding path program 4 times [2018-11-23 16:05:33,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:33,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:33,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:33,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 16:05:33,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 202 proven. 76 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-11-23 16:05:33,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 16:05:33,641 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 16:05:33,647 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 16:05:33,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 16:05:33,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 16:05:33,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 159 proven. 267 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-11-23 16:05:33,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 16:05:33,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 23 [2018-11-23 16:05:33,752 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 16:05:33,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:33,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 5 times [2018-11-23 16:05:33,753 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:33,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:33,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:33,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 16:05:33,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:33,776 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:33,776 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:33,776 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:33,776 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:33,776 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 16:05:33,776 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:33,776 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:33,776 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:33,776 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration8_Loop [2018-11-23 16:05:33,776 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:33,776 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:33,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:33,778 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:33,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:33,784 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:33,807 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:33,807 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:33,809 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:33,809 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:33,811 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 16:05:33,811 INFO L448 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:33,827 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:33,827 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:33,829 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 16:05:33,829 INFO L448 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_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:33,849 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:33,849 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:33,867 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 16:05:33,867 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:34,558 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 16:05:34,560 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:34,560 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:34,560 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:34,560 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:34,560 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 16:05:34,560 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:34,560 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:34,560 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:34,560 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration8_Loop [2018-11-23 16:05:34,560 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:34,560 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:34,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:34,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:34,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:34,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:34,586 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:34,586 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 16:05:34,586 INFO L122 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 [2018-11-23 16:05:34,586 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:34,586 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:34,586 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:34,587 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:34,587 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:34,587 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:34,587 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:34,587 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:34,588 INFO L122 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 [2018-11-23 16:05:34,588 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:34,588 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:34,588 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:34,588 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:34,588 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:34,588 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:34,588 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:34,589 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:34,589 INFO L122 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 [2018-11-23 16:05:34,589 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:34,589 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:34,589 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:34,589 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:34,590 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:34,590 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:34,590 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:34,590 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 16:05:34,590 INFO L122 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 [2018-11-23 16:05:34,590 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:34,590 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:34,591 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:34,591 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:34,591 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:34,591 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:34,591 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:34,594 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 16:05:34,595 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 16:05:34,595 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 16:05:34,595 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 16:05:34,595 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 16:05:34,596 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 16:05:34,596 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 16:05:34,596 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 16:05:34,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:34,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:34,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:34,733 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 [2018-11-23 16:05:34,733 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146 Second operand 6 states. [2018-11-23 16:05:34,760 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146. Second operand 6 states. Result 335 states and 478 transitions. Complement of second has 18 states. [2018-11-23 16:05:34,761 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 [2018-11-23 16:05:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 16:05:34,761 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 89 letters. Loop has 4 letters. [2018-11-23 16:05:34,761 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:34,761 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:34,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:34,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:34,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:34,847 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 [2018-11-23 16:05:34,848 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146 Second operand 6 states. [2018-11-23 16:05:34,889 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146. Second operand 6 states. Result 341 states and 484 transitions. Complement of second has 17 states. [2018-11-23 16:05:34,889 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 [2018-11-23 16:05:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 16:05:34,889 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 89 letters. Loop has 4 letters. [2018-11-23 16:05:34,890 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:34,890 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:34,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:34,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:34,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:34,991 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 [2018-11-23 16:05:34,991 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146 Second operand 6 states. [2018-11-23 16:05:35,036 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 320 states and 462 transitions. cyclomatic complexity: 146. Second operand 6 states. Result 398 states and 562 transitions. Complement of second has 27 states. [2018-11-23 16:05:35,037 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 [2018-11-23 16:05:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 16:05:35,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 89 letters. Loop has 4 letters. [2018-11-23 16:05:35,039 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:35,040 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 93 letters. Loop has 4 letters. [2018-11-23 16:05:35,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:35,040 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 89 letters. Loop has 8 letters. [2018-11-23 16:05:35,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:35,041 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 398 states and 562 transitions. [2018-11-23 16:05:35,044 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:35,047 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 398 states to 320 states and 462 transitions. [2018-11-23 16:05:35,047 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 137 [2018-11-23 16:05:35,047 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 150 [2018-11-23 16:05:35,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 320 states and 462 transitions. [2018-11-23 16:05:35,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:35,048 INFO L705 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-11-23 16:05:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states and 462 transitions. [2018-11-23 16:05:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2018-11-23 16:05:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-11-23 16:05:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 462 transitions. [2018-11-23 16:05:35,056 INFO L728 BuchiCegarLoop]: Abstraction has 320 states and 462 transitions. [2018-11-23 16:05:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 16:05:35,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2018-11-23 16:05:35,056 INFO L87 Difference]: Start difference. First operand 320 states and 462 transitions. Second operand 23 states. [2018-11-23 16:05:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 16:05:35,459 INFO L93 Difference]: Finished difference Result 561 states and 861 transitions. [2018-11-23 16:05:35,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-23 16:05:35,461 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 561 states and 861 transitions. [2018-11-23 16:05:35,467 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:35,472 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 561 states to 547 states and 842 transitions. [2018-11-23 16:05:35,472 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 260 [2018-11-23 16:05:35,473 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2018-11-23 16:05:35,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 547 states and 842 transitions. [2018-11-23 16:05:35,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:35,473 INFO L705 BuchiCegarLoop]: Abstraction has 547 states and 842 transitions. [2018-11-23 16:05:35,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states and 842 transitions. [2018-11-23 16:05:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 442. [2018-11-23 16:05:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2018-11-23 16:05:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 678 transitions. [2018-11-23 16:05:35,488 INFO L728 BuchiCegarLoop]: Abstraction has 442 states and 678 transitions. [2018-11-23 16:05:35,488 INFO L608 BuchiCegarLoop]: Abstraction has 442 states and 678 transitions. [2018-11-23 16:05:35,488 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-23 16:05:35,488 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 442 states and 678 transitions. [2018-11-23 16:05:35,490 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:35,490 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 16:05:35,490 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 16:05:35,491 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [24, 21, 16, 15, 15, 8, 8, 7, 7, 5, 3, 1, 1] [2018-11-23 16:05:35,491 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 16:05:35,492 INFO L794 eck$LassoCheckResult]: Stem: 14872#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 10; 14873#L25 call main_#t~ret2 := fibo(main_~x~0);< 14934#fiboENTRY ~n := #in~n; 15105#L6 assume !(~n < 1); 15101#L8 assume !(1 == ~n); 15086#L11 call #t~ret0 := fibo(~n - 1);< 15091#fiboENTRY ~n := #in~n; 15089#L6 assume !(~n < 1); 15088#L8 assume !(1 == ~n); 15074#L11 call #t~ret0 := fibo(~n - 1);< 15084#fiboENTRY ~n := #in~n; 15082#L6 assume !(~n < 1); 15078#L8 assume !(1 == ~n); 15069#L11 call #t~ret0 := fibo(~n - 1);< 15073#fiboENTRY ~n := #in~n; 15071#L6 assume !(~n < 1); 15070#L8 assume !(1 == ~n); 14977#L11 call #t~ret0 := fibo(~n - 1);< 15002#fiboENTRY ~n := #in~n; 14997#L6 assume !(~n < 1); 14994#L8 assume !(1 == ~n); 14955#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14981#L6 assume !(~n < 1); 14979#L8 assume !(1 == ~n); 14956#L11 call #t~ret0 := fibo(~n - 1);< 14969#fiboENTRY ~n := #in~n; 14983#L6 assume !(~n < 1); 15241#L8 assume 1 == ~n;#res := 1; 15240#fiboFINAL assume true; 15237#fiboEXIT >#32#return; 15233#L11-1 call #t~ret1 := fibo(~n - 2);< 15234#fiboENTRY ~n := #in~n; 15239#L6 assume ~n < 1;#res := 0; 15236#fiboFINAL assume true; 15232#fiboEXIT >#34#return; 15230#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 15228#fiboFINAL assume true; 15226#fiboEXIT >#32#return; 15059#L11-1 call #t~ret1 := fibo(~n - 2);< 15061#fiboENTRY ~n := #in~n; 15200#L6 assume !(~n < 1); 15068#L8 assume 1 == ~n;#res := 1; 14947#fiboFINAL assume true; 15058#fiboEXIT >#34#return; 15043#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 15042#fiboFINAL assume true; 15027#fiboEXIT >#32#return; 15006#L11-1 call #t~ret1 := fibo(~n - 2);< 15008#fiboENTRY ~n := #in~n; 15077#L6 assume !(~n < 1); 15067#L8 assume !(1 == ~n); 15036#L11 call #t~ret0 := fibo(~n - 1);< 15220#fiboENTRY ~n := #in~n; 15219#L6 assume !(~n < 1); 15054#L8 assume 1 == ~n;#res := 1; 15050#fiboFINAL assume true; 15034#fiboEXIT >#32#return; 14903#L11-1 call #t~ret1 := fibo(~n - 2);< 14900#fiboENTRY ~n := #in~n; 14905#L6 assume ~n < 1;#res := 0; 15033#fiboFINAL assume true; 15013#fiboEXIT >#34#return; 15012#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 15010#fiboFINAL assume true; 15005#fiboEXIT >#34#return; 14998#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 14974#fiboFINAL assume true; 14966#fiboEXIT >#32#return; 14946#L11-1 call #t~ret1 := fibo(~n - 2);< 14954#fiboENTRY ~n := #in~n; 14953#L6 assume !(~n < 1); 14945#L8 assume !(1 == ~n); 14948#L11 call #t~ret0 := fibo(~n - 1);< 15216#fiboENTRY ~n := #in~n; 15215#L6 assume !(~n < 1); 15212#L8 assume !(1 == ~n); 15194#L11 call #t~ret0 := fibo(~n - 1);< 15198#fiboENTRY ~n := #in~n; 15165#L6 assume !(~n < 1); 15199#L8 assume 1 == ~n;#res := 1; 15197#fiboFINAL assume true; 15193#fiboEXIT >#32#return; 15186#L11-1 call #t~ret1 := fibo(~n - 2);< 15192#fiboENTRY ~n := #in~n; 15196#L6 assume ~n < 1;#res := 0; 15150#fiboFINAL assume true; 15184#fiboEXIT >#34#return; 15189#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 15225#fiboFINAL assume true; 15224#fiboEXIT >#32#return; 15057#L11-1 call #t~ret1 := fibo(~n - 2);< 15060#fiboENTRY ~n := #in~n; 15175#L6 assume !(~n < 1); 15063#L8 assume 1 == ~n;#res := 1; 15052#fiboFINAL assume true; 15056#fiboEXIT >#34#return; 15043#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 15042#fiboFINAL assume true; 15027#fiboEXIT >#34#return; 14968#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 15177#fiboFINAL assume true; 15028#fiboEXIT >#32#return; 14961#L11-1 call #t~ret1 := fibo(~n - 2);< 14978#fiboENTRY ~n := #in~n; 15151#L6 assume !(~n < 1); 14995#L8 assume !(1 == ~n); 14996#L11 call #t~ret0 := fibo(~n - 1);< 15039#fiboENTRY ~n := #in~n; 15221#L6 assume !(~n < 1); 15288#L8 assume !(1 == ~n); 14893#L11 call #t~ret0 := fibo(~n - 1);< 15249#fiboENTRY ~n := #in~n; 15261#L6 assume !(~n < 1); 15256#L8 assume !(1 == ~n); 14890#L11 [2018-11-23 16:05:35,492 INFO L796 eck$LassoCheckResult]: Loop: 14890#L11 call #t~ret0 := fibo(~n - 1);< 15249#fiboENTRY ~n := #in~n; 15261#L6 assume !(~n < 1); 15256#L8 assume !(1 == ~n); 14890#L11 [2018-11-23 16:05:35,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash -235209217, now seen corresponding path program 5 times [2018-11-23 16:05:35,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:35,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:35,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:35,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 16:05:35,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 346 proven. 454 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2018-11-23 16:05:35,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 16:05:35,709 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 16:05:35,718 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 16:05:35,757 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-11-23 16:05:35,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 16:05:35,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 346 proven. 478 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2018-11-23 16:05:35,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 16:05:35,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 24 [2018-11-23 16:05:35,813 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 16:05:35,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 6 times [2018-11-23 16:05:35,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 16:05:35,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 16:05:35,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:35,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 16:05:35,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 16:05:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 16:05:35,847 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:35,847 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:35,847 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:35,847 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:35,847 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 16:05:35,847 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:35,847 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:35,847 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:35,847 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration9_Loop [2018-11-23 16:05:35,848 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:35,848 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:35,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:35,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:35,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:35,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:35,918 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:35,918 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/uautomizer/z3 Starting monitored process 32 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:35,920 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 16:05:35,920 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_da864462-057f-4b6b-9d48-92aa6536c54a/bin-2019/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 [2018-11-23 16:05:35,949 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 16:05:35,950 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 16:05:41,199 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 16:05:41,201 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 16:05:41,201 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 16:05:41,201 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 16:05:41,201 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 16:05:41,201 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 16:05:41,201 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 16:05:41,201 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 16:05:41,202 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 16:05:41,202 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_10_true-unreach-call_true-termination.c_Iteration9_Loop [2018-11-23 16:05:41,202 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 16:05:41,202 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 16:05:41,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:41,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:41,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:41,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 16:05:41,230 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 16:05:41,230 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 16:05:41,230 INFO L122 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 [2018-11-23 16:05:41,231 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 16:05:41,231 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 16:05:41,231 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 16:05:41,231 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 16:05:41,231 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 16:05:41,231 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 16:05:41,231 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 16:05:41,233 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 16:05:41,234 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 16:05:41,234 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 16:05:41,234 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 16:05:41,234 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 16:05:41,234 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 16:05:41,234 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 16:05:41,235 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 16:05:41,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:41,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:41,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:41,362 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 [2018-11-23 16:05:41,362 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240 Second operand 6 states. [2018-11-23 16:05:41,395 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240. Second operand 6 states. Result 460 states and 697 transitions. Complement of second has 18 states. [2018-11-23 16:05:41,397 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 [2018-11-23 16:05:41,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2018-11-23 16:05:41,397 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 131 letters. Loop has 4 letters. [2018-11-23 16:05:41,397 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:41,398 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:41,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:41,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:41,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:41,558 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 [2018-11-23 16:05:41,558 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240 Second operand 6 states. [2018-11-23 16:05:41,621 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240. Second operand 6 states. Result 466 states and 703 transitions. Complement of second has 17 states. [2018-11-23 16:05:41,622 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 [2018-11-23 16:05:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-23 16:05:41,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 131 letters. Loop has 4 letters. [2018-11-23 16:05:41,623 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:41,623 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 16:05:41,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 16:05:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:41,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 16:05:41,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 16:05:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 16:05:41,785 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 [2018-11-23 16:05:41,785 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240 Second operand 6 states. [2018-11-23 16:05:41,837 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 442 states and 678 transitions. cyclomatic complexity: 240. Second operand 6 states. Result 563 states and 838 transitions. Complement of second has 27 states. [2018-11-23 16:05:41,838 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 [2018-11-23 16:05:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-23 16:05:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2018-11-23 16:05:41,838 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 131 letters. Loop has 4 letters. [2018-11-23 16:05:41,839 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:41,839 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 135 letters. Loop has 4 letters. [2018-11-23 16:05:41,839 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:41,839 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 131 letters. Loop has 8 letters. [2018-11-23 16:05:41,840 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 16:05:41,840 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 563 states and 838 transitions. [2018-11-23 16:05:41,844 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-23 16:05:41,848 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 563 states to 446 states and 683 transitions. [2018-11-23 16:05:41,849 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 179 [2018-11-23 16:05:41,849 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 201 [2018-11-23 16:05:41,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 446 states and 683 transitions. [2018-11-23 16:05:41,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 16:05:41,849 INFO L705 BuchiCegarLoop]: Abstraction has 446 states and 683 transitions. [2018-11-23 16:05:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states and 683 transitions. [2018-11-23 16:05:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 442. [2018-11-23 16:05:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2018-11-23 16:05:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 678 transitions. [2018-11-23 16:05:41,859 INFO L728 BuchiCegarLoop]: Abstraction has 442 states and 678 transitions. [2018-11-23 16:05:41,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-23 16:05:41,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2018-11-23 16:05:41,860 INFO L87 Difference]: Start difference. First operand 442 states and 678 transitions. Second operand 24 states. [2018-11-23 16:05:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 16:05:42,706 INFO L93 Difference]: Finished difference Result 575 states and 804 transitions. [2018-11-23 16:05:42,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-23 16:05:42,706 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 575 states and 804 transitions. [2018-11-23 16:05:42,710 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 16:05:42,710 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 575 states to 0 states and 0 transitions. [2018-11-23 16:05:42,710 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 16:05:42,710 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 16:05:42,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 16:05:42,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 16:05:42,710 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 16:05:42,710 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 16:05:42,710 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 16:05:42,710 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-11-23 16:05:42,710 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 16:05:42,711 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 16:05:42,711 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 16:05:42,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 04:05:42 BoogieIcfgContainer [2018-11-23 16:05:42,718 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 16:05:42,718 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 16:05:42,718 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 16:05:42,719 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 16:05:42,719 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:05:20" (3/4) ... [2018-11-23 16:05:42,725 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 16:05:42,725 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 16:05:42,725 INFO L168 Benchmark]: Toolchain (without parser) took 22332.26 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 375.4 MB). Free memory was 953.8 MB in the beginning and 900.5 MB in the end (delta: 53.3 MB). Peak memory consumption was 428.7 MB. Max. memory is 11.5 GB. [2018-11-23 16:05:42,727 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 16:05:42,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.24 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-23 16:05:42,727 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.99 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 16:05:42,728 INFO L168 Benchmark]: Boogie Preprocessor took 9.95 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 16:05:42,728 INFO L168 Benchmark]: RCFGBuilder took 152.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -165.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-23 16:05:42,728 INFO L168 Benchmark]: BuchiAutomizer took 21985.04 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 252.7 MB). Free memory was 1.1 GB in the beginning and 900.5 MB in the end (delta: 205.3 MB). Peak memory consumption was 458.0 MB. Max. memory is 11.5 GB. [2018-11-23 16:05:42,731 INFO L168 Benchmark]: Witness Printer took 6.45 ms. Allocated memory is still 1.4 GB. Free memory is still 900.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 16:05:42,733 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 158.24 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.99 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.95 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 152.63 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -165.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 21985.04 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 252.7 MB). Free memory was 1.1 GB in the beginning and 900.5 MB in the end (delta: 205.3 MB). Peak memory consumption was 458.0 MB. Max. memory is 11.5 GB. * Witness Printer took 6.45 ms. Allocated memory is still 1.4 GB. Free memory is still 900.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 16 terminating modules (8 trivial, 2 deterministic, 6 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.9s and 10 iterations. TraceHistogramMax:24. Analysis of lassos took 16.3s. Construction of modules took 1.2s. Büchi inclusion checks took 4.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 496 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 442 states and ocurred in iteration 8. Nontrivial modules had stage [2, 0, 6, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 338 SDtfs, 934 SDslu, 469 SDs, 0 SdLazy, 1848 SolverSat, 717 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf97 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 9 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 13.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...