./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5_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_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 c7b71b458b3f08f188a62c7539b715f43fd7f97d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 04:49:08,353 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 04:49:08,354 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 04:49:08,362 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 04:49:08,362 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 04:49:08,363 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 04:49:08,363 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 04:49:08,364 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 04:49:08,366 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 04:49:08,366 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 04:49:08,367 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 04:49:08,367 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 04:49:08,368 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 04:49:08,368 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 04:49:08,369 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 04:49:08,369 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 04:49:08,370 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 04:49:08,371 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 04:49:08,372 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 04:49:08,373 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 04:49:08,374 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 04:49:08,375 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 04:49:08,377 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 04:49:08,377 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 04:49:08,377 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 04:49:08,378 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 04:49:08,378 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 04:49:08,379 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 04:49:08,379 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 04:49:08,380 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 04:49:08,380 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 04:49:08,381 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 04:49:08,381 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 04:49:08,381 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 04:49:08,382 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 04:49:08,382 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 04:49:08,382 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-23 04:49:08,393 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 04:49:08,394 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 04:49:08,394 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 04:49:08,395 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 04:49:08,395 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 04:49:08,395 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 04:49:08,395 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 04:49:08,395 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 04:49:08,395 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 04:49:08,395 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 04:49:08,395 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 04:49:08,396 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 04:49:08,396 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 04:49:08,396 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 04:49:08,396 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 04:49:08,396 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 04:49:08,396 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 04:49:08,396 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 04:49:08,396 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 04:49:08,397 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 04:49:08,397 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 04:49:08,397 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 04:49:08,397 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 04:49:08,397 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 04:49:08,397 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 04:49:08,397 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 04:49:08,397 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 04:49:08,397 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 04:49:08,398 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 04:49:08,398 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 04:49:08,398 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 04:49:08,398 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 04:49:08,399 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_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2018-11-23 04:49:08,421 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 04:49:08,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 04:49:08,431 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 04:49:08,432 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 04:49:08,433 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 04:49:08,433 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-11-23 04:49:08,470 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/data/fd31e2313/692c65e7454543e487f39e90311d5472/FLAGbb3bc9b7f [2018-11-23 04:49:08,776 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 04:49:08,777 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-11-23 04:49:08,781 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/data/fd31e2313/692c65e7454543e487f39e90311d5472/FLAGbb3bc9b7f [2018-11-23 04:49:08,790 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/bin-2019/uautomizer/data/fd31e2313/692c65e7454543e487f39e90311d5472 [2018-11-23 04:49:08,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 04:49:08,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 04:49:08,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 04:49:08,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 04:49:08,797 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 04:49:08,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa3a850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08, skipping insertion in model container [2018-11-23 04:49:08,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 04:49:08,823 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 04:49:08,935 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 04:49:08,938 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 04:49:08,946 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 04:49:08,956 INFO L195 MainTranslator]: Completed translation [2018-11-23 04:49:08,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08 WrapperNode [2018-11-23 04:49:08,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 04:49:08,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 04:49:08,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 04:49:08,957 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 04:49:08,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 04:49:08,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 04:49:08,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 04:49:08,980 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 04:49:08,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... [2018-11-23 04:49:08,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 04:49:08,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 04:49:08,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 04:49:08,990 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 04:49:08,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:09,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 04:49:09,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 04:49:09,066 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-23 04:49:09,067 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-23 04:49:09,156 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 04:49:09,157 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-23 04:49:09,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:49:09 BoogieIcfgContainer [2018-11-23 04:49:09,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 04:49:09,158 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 04:49:09,158 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 04:49:09,161 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 04:49:09,161 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 04:49:09,161 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 04:49:08" (1/3) ... [2018-11-23 04:49:09,162 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@18bf68d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 04:49:09, skipping insertion in model container [2018-11-23 04:49:09,162 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 04:49:09,163 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:49:08" (2/3) ... [2018-11-23 04:49:09,163 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@18bf68d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 04:49:09, skipping insertion in model container [2018-11-23 04:49:09,163 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 04:49:09,163 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:49:09" (3/3) ... [2018-11-23 04:49:09,164 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_5_true-unreach-call_true-termination.c [2018-11-23 04:49:09,203 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 04:49:09,204 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 04:49:09,204 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 04:49:09,204 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 04:49:09,204 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 04:49:09,204 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 04:49:09,204 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 04:49:09,204 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 04:49:09,205 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 04:49:09,213 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 04:49:09,230 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 04:49:09,231 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 04:49:09,231 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 04:49:09,236 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 04:49:09,236 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 04:49:09,236 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 04:49:09,236 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2018-11-23 04:49:09,237 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 04:49:09,237 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 04:49:09,238 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 04:49:09,238 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 04:49:09,238 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 04:49:09,243 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2018-11-23 04:49:09,243 INFO L796 eck$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 04:49:09,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:09,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2018-11-23 04:49:09,248 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:09,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:09,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:09,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:09,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:09,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:09,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2018-11-23 04:49:09,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:09,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:09,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:09,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:09,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:09,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:09,326 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2018-11-23 04:49:09,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:09,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:09,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:09,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:09,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:09,408 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 04:49:09,409 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 04:49:09,409 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 04:49:09,409 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 04:49:09,410 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 04:49:09,410 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 04:49:09,410 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 04:49:09,410 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 04:49:09,410 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 04:49:09,410 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 04:49:09,411 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 04:49:09,427 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 04:49:09,432 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 04:49:09,440 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 04:49:09,443 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 04:49:09,445 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 04:49:09,492 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 04:49:09,493 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:09,505 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 04:49:09,505 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 04:49:09,516 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 04:49:09,516 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_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:09,540 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 04:49:09,540 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 04:49:09,543 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 04:49:09,543 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_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:09,559 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 04:49:09,559 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 04:49:09,564 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 04:49:09,564 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_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:09,587 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 04:49:09,588 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 04:49:09,590 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 04:49:09,590 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_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:09,605 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 04:49:09,605 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:09,623 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 04:49:09,623 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 04:49:09,645 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 04:49:09,646 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 04:49:09,646 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 04:49:09,646 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 04:49:09,646 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 04:49:09,646 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 04:49:09,646 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 04:49:09,646 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 04:49:09,646 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 04:49:09,646 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-23 04:49:09,647 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 04:49:09,647 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 04:49:09,647 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 04:49:09,649 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 04:49:09,651 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 04:49:09,657 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 04:49:09,658 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 04:49:09,690 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 04:49:09,693 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 04:49:09,694 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 04:49:09,695 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:09,695 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:09,696 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:09,696 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:09,696 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:09,697 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:09,697 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:09,700 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 04:49:09,700 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 04:49:09,701 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:09,701 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:09,701 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:09,701 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:09,701 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:09,702 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:09,702 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:09,703 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 04:49:09,703 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 04:49:09,703 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:09,703 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:09,703 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:09,704 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:09,704 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:09,704 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:09,704 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:09,708 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 04:49:09,709 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 04:49:09,709 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:09,709 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:09,710 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:09,710 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:09,710 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:09,710 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:09,710 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:09,711 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 04:49:09,711 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 04:49:09,711 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:09,711 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:09,712 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:09,712 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:09,712 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:09,712 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:09,712 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:09,715 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 04:49:09,718 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 04:49:09,718 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 04:49:09,719 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 04:49:09,719 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 04:49:09,719 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 04:49:09,719 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 04:49:09,720 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 04:49:09,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:09,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:09,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:09,811 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 04:49:09,821 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 04:49:09,822 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2018-11-23 04:49:09,899 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 04:49:09,899 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 04:49:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 04:49:09,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-11-23 04:49:09,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2018-11-23 04:49:09,903 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:09,903 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2018-11-23 04:49:09,904 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:09,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-23 04:49:09,904 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:09,904 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2018-11-23 04:49:09,907 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 04:49:09,911 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2018-11-23 04:49:09,911 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-23 04:49:09,912 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-23 04:49:09,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2018-11-23 04:49:09,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 04:49:09,913 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2018-11-23 04:49:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2018-11-23 04:49:09,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2018-11-23 04:49:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 04:49:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2018-11-23 04:49:09,932 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 04:49:09,932 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-11-23 04:49:09,932 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 04:49:09,932 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2018-11-23 04:49:09,933 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 04:49:09,933 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 04:49:09,933 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 04:49:09,934 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 04:49:09,934 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 04:49:09,934 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2018-11-23 04:49:09,934 INFO L796 eck$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 04:49:09,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:09,935 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2018-11-23 04:49:09,935 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:09,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:09,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:09,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:09,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:10,008 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 04:49:10,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 04:49:10,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 04:49:10,012 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 04:49:10,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:10,012 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2018-11-23 04:49:10,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:10,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:10,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:10,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:10,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 04:49:10,042 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 04:49:10,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 04:49:10,042 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 04:49:10,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 04:49:10,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 04:49:10,045 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-23 04:49:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 04:49:10,120 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-11-23 04:49:10,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 04:49:10,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2018-11-23 04:49:10,122 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 04:49:10,123 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2018-11-23 04:49:10,123 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2018-11-23 04:49:10,123 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2018-11-23 04:49:10,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2018-11-23 04:49:10,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 04:49:10,124 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 04:49:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2018-11-23 04:49:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-23 04:49:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 04:49:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2018-11-23 04:49:10,127 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 04:49:10,127 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2018-11-23 04:49:10,127 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 04:49:10,127 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2018-11-23 04:49:10,127 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 04:49:10,127 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 04:49:10,127 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 04:49:10,128 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 04:49:10,128 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 04:49:10,128 INFO L794 eck$LassoCheckResult]: Stem: 183#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 184#L25 call main_#t~ret2 := fibo(main_~x~0);< 188#fiboENTRY ~n := #in~n; 189#L6 assume !(~n < 1); 187#L8 assume !(1 == ~n); 181#L11 call #t~ret0 := fibo(~n - 1);< 190#fiboENTRY ~n := #in~n; 191#L6 assume !(~n < 1); 185#L8 assume 1 == ~n;#res := 1; 186#fiboFINAL assume true; 180#fiboEXIT >#32#return; 182#L11-1 [2018-11-23 04:49:10,128 INFO L796 eck$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 04:49:10,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2018-11-23 04:49:10,129 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:10,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:10,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:10,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:10,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:10,166 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 04:49:10,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 04:49:10,166 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:10,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:10,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:10,183 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 04:49:10,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 04:49:10,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 04:49:10,199 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 04:49:10,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:10,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2018-11-23 04:49:10,199 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:10,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:10,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:10,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:10,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:10,309 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 04:49:10,309 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 04:49:10,309 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 04:49:10,309 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 04:49:10,309 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 04:49:10,310 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 04:49:10,310 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 04:49:10,310 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 04:49:10,310 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 04:49:10,310 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 04:49:10,310 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 04:49:10,311 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 04:49:10,320 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 04:49:10,328 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 04:49:10,330 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 04:49:10,359 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 04:49:10,359 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:10,373 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 04:49:10,373 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:10,391 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 04:49:10,391 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 04:49:10,885 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 04:49:10,886 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 04:49:10,886 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 04:49:10,886 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 04:49:10,887 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 04:49:10,887 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 04:49:10,887 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 04:49:10,887 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 04:49:10,887 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 04:49:10,887 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-23 04:49:10,887 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 04:49:10,887 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 04:49:10,888 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 04:49:10,890 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 04:49:10,895 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 04:49:10,897 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 04:49:10,937 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 04:49:10,938 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 04:49:10,938 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 04:49:10,938 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:10,938 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:10,939 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:10,939 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:10,939 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:10,939 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:10,939 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:10,941 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 04:49:10,942 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 04:49:10,942 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:10,942 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:10,943 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:10,943 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:10,943 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:10,943 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:10,943 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:10,946 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 04:49:10,949 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 04:49:10,949 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 04:49:10,949 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 04:49:10,950 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 04:49:10,950 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 04:49:10,950 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 04:49:10,950 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 04:49:10,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:10,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:11,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:11,052 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 04:49:11,053 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 04:49:11,053 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-23 04:49:11,153 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 04:49:11,154 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 04:49:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 04:49:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 04:49:11,155 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2018-11-23 04:49:11,155 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:11,155 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2018-11-23 04:49:11,156 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:11,156 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2018-11-23 04:49:11,156 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:11,156 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2018-11-23 04:49:11,161 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 04:49:11,164 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2018-11-23 04:49:11,164 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2018-11-23 04:49:11,164 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 04:49:11,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2018-11-23 04:49:11,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 04:49:11,165 INFO L705 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2018-11-23 04:49:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2018-11-23 04:49:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2018-11-23 04:49:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 04:49:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2018-11-23 04:49:11,173 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2018-11-23 04:49:11,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 04:49:11,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 04:49:11,173 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 7 states. [2018-11-23 04:49:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 04:49:11,221 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2018-11-23 04:49:11,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 04:49:11,221 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2018-11-23 04:49:11,224 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 04:49:11,226 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2018-11-23 04:49:11,226 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2018-11-23 04:49:11,226 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2018-11-23 04:49:11,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-11-23 04:49:11,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 04:49:11,227 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-11-23 04:49:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-11-23 04:49:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2018-11-23 04:49:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-23 04:49:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2018-11-23 04:49:11,234 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 04:49:11,234 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2018-11-23 04:49:11,234 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 04:49:11,234 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2018-11-23 04:49:11,236 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-23 04:49:11,237 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 04:49:11,237 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 04:49:11,237 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 04:49:11,237 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-23 04:49:11,238 INFO L794 eck$LassoCheckResult]: Stem: 703#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 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~ret1;havoc #t~ret0; 771#fiboFINAL assume true; 759#fiboEXIT >#32#return; 760#L11-1 [2018-11-23 04:49:11,238 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 04:49:11,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:11,238 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2018-11-23 04:49:11,238 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:11,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:11,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:11,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:11,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:11,315 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 04:49:11,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 04:49:11,315 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:11,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:11,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:11,337 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 04:49:11,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 04:49:11,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-23 04:49:11,353 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 04:49:11,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:11,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 2 times [2018-11-23 04:49:11,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:11,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:11,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:11,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:11,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:11,408 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 04:49:11,408 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 04:49:11,408 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 04:49:11,408 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 04:49:11,408 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 04:49:11,409 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 04:49:11,409 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 04:49:11,409 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 04:49:11,409 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 04:49:11,409 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 04:49:11,409 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 04:49:11,410 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 04:49:11,414 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 04:49:11,416 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 04:49:11,417 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 04:49:11,440 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 04:49:11,440 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:11,443 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 04:49:11,443 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:11,460 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 04:49:11,460 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 04:49:11,960 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 04:49:11,961 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 04:49:11,962 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 04:49:11,962 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 04:49:11,962 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 04:49:11,962 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 04:49:11,962 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 04:49:11,962 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 04:49:11,962 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 04:49:11,962 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration4_Loop [2018-11-23 04:49:11,962 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 04:49:11,962 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 04:49:11,963 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 04:49:11,964 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 04:49:11,968 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 04:49:11,970 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 04:49:11,991 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 04:49:11,991 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 04:49:11,992 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 04:49:11,992 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:11,992 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:11,992 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:11,993 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:11,993 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:11,993 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:11,993 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:11,994 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 04:49:11,994 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 04:49:11,994 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:11,995 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:11,995 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:11,995 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:11,995 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:11,995 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:11,995 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:11,996 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 04:49:11,996 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 04:49:11,996 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:11,997 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:11,997 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:11,997 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:11,997 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:11,997 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:11,997 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:11,999 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 04:49:11,999 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 04:49:11,999 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:11,999 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:12,000 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:12,000 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:12,000 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:12,000 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:12,000 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:12,003 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 04:49:12,004 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 04:49:12,005 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 04:49:12,005 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 04:49:12,005 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 04:49:12,005 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 04:49:12,005 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-23 04:49:12,005 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 04:49:12,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:12,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:12,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:12,089 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 04:49:12,089 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 04:49:12,090 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 04:49:12,170 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 04:49:12,171 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 04:49:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 04:49:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2018-11-23 04:49:12,172 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 04:49:12,172 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:12,172 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 04:49:12,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:12,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:12,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:12,261 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 04:49:12,261 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 04:49:12,262 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 04:49:12,346 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 04:49:12,348 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 04:49:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 04:49:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2018-11-23 04:49:12,349 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 04:49:12,349 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:12,350 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 04:49:12,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:12,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:12,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:12,424 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 04:49:12,425 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 04:49:12,425 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-23 04:49:12,552 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 04:49:12,555 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 04:49:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 04:49:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 39 transitions. [2018-11-23 04:49:12,555 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 10 letters. [2018-11-23 04:49:12,556 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:12,556 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 37 letters. Loop has 10 letters. [2018-11-23 04:49:12,556 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:12,556 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 39 transitions. Stem has 27 letters. Loop has 20 letters. [2018-11-23 04:49:12,557 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:12,557 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 825 states and 1090 transitions. [2018-11-23 04:49:12,569 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 04:49:12,578 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 825 states to 412 states and 594 transitions. [2018-11-23 04:49:12,578 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-23 04:49:12,578 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 179 [2018-11-23 04:49:12,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 412 states and 594 transitions. [2018-11-23 04:49:12,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 04:49:12,579 INFO L705 BuchiCegarLoop]: Abstraction has 412 states and 594 transitions. [2018-11-23 04:49:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states and 594 transitions. [2018-11-23 04:49:12,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 335. [2018-11-23 04:49:12,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-11-23 04:49:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 462 transitions. [2018-11-23 04:49:12,607 INFO L728 BuchiCegarLoop]: Abstraction has 335 states and 462 transitions. [2018-11-23 04:49:12,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 04:49:12,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-23 04:49:12,607 INFO L87 Difference]: Start difference. First operand 335 states and 462 transitions. Second operand 10 states. [2018-11-23 04:49:12,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 04:49:12,751 INFO L93 Difference]: Finished difference Result 497 states and 787 transitions. [2018-11-23 04:49:12,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 04:49:12,753 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 497 states and 787 transitions. [2018-11-23 04:49:12,760 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-23 04:49:12,767 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 497 states to 495 states and 784 transitions. [2018-11-23 04:49:12,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2018-11-23 04:49:12,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-23 04:49:12,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 495 states and 784 transitions. [2018-11-23 04:49:12,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 04:49:12,768 INFO L705 BuchiCegarLoop]: Abstraction has 495 states and 784 transitions. [2018-11-23 04:49:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states and 784 transitions. [2018-11-23 04:49:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 365. [2018-11-23 04:49:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2018-11-23 04:49:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 517 transitions. [2018-11-23 04:49:12,789 INFO L728 BuchiCegarLoop]: Abstraction has 365 states and 517 transitions. [2018-11-23 04:49:12,789 INFO L608 BuchiCegarLoop]: Abstraction has 365 states and 517 transitions. [2018-11-23 04:49:12,789 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 04:49:12,789 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 365 states and 517 transitions. [2018-11-23 04:49:12,792 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 04:49:12,792 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 04:49:12,792 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 04:49:12,793 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-23 04:49:12,793 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-23 04:49:12,793 INFO L794 eck$LassoCheckResult]: Stem: 3543#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 3544#L25 call main_#t~ret2 := fibo(main_~x~0);< 3586#fiboENTRY ~n := #in~n; 3598#L6 assume !(~n < 1); 3597#L8 assume !(1 == ~n); 3592#L11 call #t~ret0 := fibo(~n - 1);< 3596#fiboENTRY ~n := #in~n; 3594#L6 assume !(~n < 1); 3595#L8 assume !(1 == ~n); 3555#L11 call #t~ret0 := fibo(~n - 1);< 3589#fiboENTRY ~n := #in~n; 3591#L6 assume !(~n < 1); 3593#L8 assume !(1 == ~n); 3554#L11 call #t~ret0 := fibo(~n - 1);< 3589#fiboENTRY ~n := #in~n; 3590#L6 assume !(~n < 1); 3553#L8 assume 1 == ~n;#res := 1; 3556#fiboFINAL assume true; 3672#fiboEXIT >#32#return; 3617#L11-1 call #t~ret1 := fibo(~n - 2);< 3618#fiboENTRY ~n := #in~n; 3739#L6 assume !(~n < 1); 3736#L8 assume !(1 == ~n); 3737#L11 call #t~ret0 := fibo(~n - 1);< 3749#fiboENTRY ~n := #in~n; 3865#L6 assume !(~n < 1); 3863#L8 assume !(1 == ~n); 3666#L11 call #t~ret0 := fibo(~n - 1);< 3872#fiboENTRY [2018-11-23 04:49:12,793 INFO L796 eck$LassoCheckResult]: Loop: 3872#fiboENTRY ~n := #in~n; 3879#L6 assume !(~n < 1); 3878#L8 assume !(1 == ~n); 3667#L11 call #t~ret0 := fibo(~n - 1);< 3872#fiboENTRY [2018-11-23 04:49:12,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1902381534, now seen corresponding path program 1 times [2018-11-23 04:49:12,793 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:12,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:12,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:12,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 04:49:12,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-23 04:49:12,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 04:49:12,891 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:12,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:12,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:13,019 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 04:49:13,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 04:49:13,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-11-23 04:49:13,035 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 04:49:13,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:13,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2018-11-23 04:49:13,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 04:49:13,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 04:49:13,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:13,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 04:49:13,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 04:49:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 04:49:13,057 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 04:49:13,057 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 04:49:13,057 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 04:49:13,057 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 04:49:13,057 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 04:49:13,057 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 04:49:13,057 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 04:49:13,057 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 04:49:13,057 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 04:49:13,057 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 04:49:13,058 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 04:49:13,058 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 04:49:13,063 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 04:49:13,067 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 04:49:13,068 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 04:49:13,069 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 04:49:13,085 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 04:49:13,085 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:13,087 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 04:49:13,087 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 04:49:13,089 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 04:49:13,089 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_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:13,104 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 04:49:13,104 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_ff24d18c-4373-4c8c-9cba-6eecd913d680/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 04:49:13,121 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 04:49:13,121 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 04:49:13,136 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 04:49:13,138 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 04:49:13,138 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 04:49:13,138 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 04:49:13,138 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 04:49:13,138 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 04:49:13,138 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 04:49:13,138 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 04:49:13,138 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 04:49:13,138 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration5_Loop [2018-11-23 04:49:13,138 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 04:49:13,138 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 04:49:13,139 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 04:49:13,144 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 04:49:13,145 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 04:49:13,149 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 04:49:13,150 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 04:49:13,171 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 04:49:13,171 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 04:49:13,171 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 04:49:13,172 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 04:49:13,172 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 04:49:13,172 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 04:49:13,172 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 04:49:13,172 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 04:49:13,172 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 04:49:13,173 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 04:49:13,174 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 04:49:13,176 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 04:49:13,176 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 04:49:13,176 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 04:49:13,176 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 04:49:13,176 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 04:49:13,176 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-23 04:49:13,177 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 04:49:13,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:13,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:13,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:13,269 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 04:49:13,269 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 04:49:13,269 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-11-23 04:49:13,313 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 375 states and 527 transitions. Complement of second has 13 states. [2018-11-23 04:49:13,314 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 04:49:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 04:49:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 04:49:13,314 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 04:49:13,315 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:13,315 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 04:49:13,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:13,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:13,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:13,400 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 04:49:13,400 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 04:49:13,400 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-11-23 04:49:13,444 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 375 states and 527 transitions. Complement of second has 13 states. [2018-11-23 04:49:13,445 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 04:49:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 04:49:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-23 04:49:13,446 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 04:49:13,446 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:13,446 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 04:49:13,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 04:49:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:13,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 04:49:13,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 04:49:13,529 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 04:49:13,529 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 04:49:13,529 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-11-23 04:49:13,588 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 365 states and 517 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 492 states and 654 transitions. Complement of second has 14 states. [2018-11-23 04:49:13,592 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 04:49:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 04:49:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-11-23 04:49:13,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 4 letters. [2018-11-23 04:49:13,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:13,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2018-11-23 04:49:13,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:13,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 28 letters. Loop has 8 letters. [2018-11-23 04:49:13,594 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 04:49:13,594 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 492 states and 654 transitions. [2018-11-23 04:49:13,597 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-23 04:49:13,600 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 492 states to 405 states and 565 transitions. [2018-11-23 04:49:13,600 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2018-11-23 04:49:13,601 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 160 [2018-11-23 04:49:13,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 405 states and 565 transitions. [2018-11-23 04:49:13,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 04:49:13,601 INFO L705 BuchiCegarLoop]: Abstraction has 405 states and 565 transitions. [2018-11-23 04:49:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states and 565 transitions. [2018-11-23 04:49:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 389. [2018-11-23 04:49:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2018-11-23 04:49:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 541 transitions. [2018-11-23 04:49:13,611 INFO L728 BuchiCegarLoop]: Abstraction has 389 states and 541 transitions. [2018-11-23 04:49:13,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 04:49:13,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-11-23 04:49:13,611 INFO L87 Difference]: Start difference. First operand 389 states and 541 transitions. Second operand 20 states. [2018-11-23 04:49:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 04:49:13,824 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2018-11-23 04:49:13,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 04:49:13,825 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 169 states and 208 transitions. [2018-11-23 04:49:13,826 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 04:49:13,826 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 169 states to 0 states and 0 transitions. [2018-11-23 04:49:13,827 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 04:49:13,827 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 04:49:13,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 04:49:13,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 04:49:13,827 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 04:49:13,827 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 04:49:13,827 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 04:49:13,827 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 04:49:13,827 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 04:49:13,827 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 04:49:13,827 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 04:49:13,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 04:49:13 BoogieIcfgContainer [2018-11-23 04:49:13,833 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 04:49:13,834 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 04:49:13,834 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 04:49:13,834 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 04:49:13,834 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:49:09" (3/4) ... [2018-11-23 04:49:13,837 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 04:49:13,837 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 04:49:13,838 INFO L168 Benchmark]: Toolchain (without parser) took 5044.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 959.2 MB in the beginning and 977.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 168.5 MB. Max. memory is 11.5 GB. [2018-11-23 04:49:13,838 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 04:49:13,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.67 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 04:49:13,839 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.41 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 04:49:13,839 INFO L168 Benchmark]: Boogie Preprocessor took 10.13 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 04:49:13,840 INFO L168 Benchmark]: RCFGBuilder took 167.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-23 04:49:13,840 INFO L168 Benchmark]: BuchiAutomizer took 4675.74 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 50.9 MB). Free memory was 1.1 GB in the beginning and 977.9 MB in the end (delta: 146.9 MB). Peak memory consumption was 197.8 MB. Max. memory is 11.5 GB. [2018-11-23 04:49:13,841 INFO L168 Benchmark]: Witness Printer took 3.31 ms. Allocated memory is still 1.2 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 04:49:13,843 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 162.67 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.41 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.13 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 167.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -179.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4675.74 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 50.9 MB). Free memory was 1.1 GB in the beginning and 977.9 MB in the end (delta: 146.9 MB). Peak memory consumption was 197.8 MB. Max. memory is 11.5 GB. * Witness Printer took 3.31 ms. Allocated memory is still 1.2 GB. Free memory is still 977.9 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 8 terminating modules (4 trivial, 2 deterministic, 2 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. 4 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.6s and 6 iterations. TraceHistogramMax:6. Analysis of lassos took 2.5s. Construction of modules took 0.4s. Büchi inclusion checks took 1.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 254 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 365 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 149 SDtfs, 379 SDslu, 185 SDs, 0 SdLazy, 716 SolverSat, 197 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp90 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq189 hnf92 smp84 dnf100 smp100 tf110 neg97 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 6ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...