./Ultimate.py --spec ../../sv-benchmarks/c/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 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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_cade5e77-42c9-4950-a7e2-50100f026b72/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 0.1.23-1dbac8b [2018-10-27 06:11:46,785 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:11:46,787 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:11:46,800 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:11:46,801 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:11:46,802 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:11:46,802 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:11:46,804 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:11:46,806 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:11:46,807 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:11:46,807 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:11:46,808 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:11:46,808 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:11:46,809 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:11:46,810 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:11:46,810 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:11:46,811 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:11:46,813 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:11:46,815 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:11:46,816 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:11:46,817 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:11:46,818 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:11:46,819 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:11:46,820 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:11:46,820 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:11:46,821 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:11:46,822 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:11:46,822 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:11:46,823 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:11:46,824 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:11:46,825 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:11:46,825 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:11:46,825 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:11:46,825 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:11:46,826 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:11:46,827 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:11:46,827 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-10-27 06:11:46,839 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:11:46,840 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:11:46,841 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 06:11:46,841 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 06:11:46,841 INFO L133 SettingsManager]: * Use SBE=true [2018-10-27 06:11:46,841 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-10-27 06:11:46,841 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-10-27 06:11:46,842 INFO L133 SettingsManager]: * Use old map elimination=false [2018-10-27 06:11:46,842 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-10-27 06:11:46,842 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-10-27 06:11:46,842 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-10-27 06:11:46,842 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:11:46,842 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 06:11:46,842 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 06:11:46,843 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:11:46,843 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 06:11:46,843 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:11:46,843 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-10-27 06:11:46,843 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-10-27 06:11:46,843 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-10-27 06:11:46,843 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 06:11:46,844 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:11:46,844 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-10-27 06:11:46,846 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-10-27 06:11:46,846 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:11:46,846 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:11:46,846 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-10-27 06:11:46,846 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:11:46,846 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-27 06:11:46,847 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-10-27 06:11:46,847 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-27 06:11:46,847 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_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:46,872 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:11:46,882 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:11:46,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:11:46,886 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:11:46,886 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:11:46,887 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-10-27 06:11:46,939 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/bin-2019/uautomizer/data/66b911dc0/8595adda0eab4b4f893d681cde3c67ae/FLAG929793647 [2018-10-27 06:11:47,320 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:11:47,321 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-10-27 06:11:47,326 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/bin-2019/uautomizer/data/66b911dc0/8595adda0eab4b4f893d681cde3c67ae/FLAG929793647 [2018-10-27 06:11:47,338 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/bin-2019/uautomizer/data/66b911dc0/8595adda0eab4b4f893d681cde3c67ae [2018-10-27 06:11:47,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:11:47,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 06:11:47,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:11:47,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:11:47,346 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:11:47,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67ed68ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47, skipping insertion in model container [2018-10-27 06:11:47,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:11:47,372 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:11:47,487 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:11:47,489 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:11:47,499 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:11:47,510 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:11:47,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47 WrapperNode [2018-10-27 06:11:47,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:11:47,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:11:47,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:11:47,512 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:11:47,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:11:47,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:11:47,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:11:47,534 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:11:47,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... [2018-10-27 06:11:47,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:11:47,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:11:47,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:11:47,545 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:11:47,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:47,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:11:47,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:11:47,644 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-10-27 06:11:47,644 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-10-27 06:11:47,971 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:11:47,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:47 BoogieIcfgContainer [2018-10-27 06:11:47,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:11:47,972 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-10-27 06:11:47,972 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-10-27 06:11:47,975 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-10-27 06:11:47,984 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:11:47,984 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.10 06:11:47" (1/3) ... [2018-10-27 06:11:47,985 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@41237456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:11:47, skipping insertion in model container [2018-10-27 06:11:47,985 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:11:47,986 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:11:47" (2/3) ... [2018-10-27 06:11:47,986 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@41237456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:11:47, skipping insertion in model container [2018-10-27 06:11:47,986 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:11:47,986 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:47" (3/3) ... [2018-10-27 06:11:47,988 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_5_true-unreach-call_true-termination.c [2018-10-27 06:11:48,059 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-27 06:11:48,059 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-10-27 06:11:48,059 INFO L375 BuchiCegarLoop]: Hoare is false [2018-10-27 06:11:48,060 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-10-27 06:11:48,060 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:11:48,060 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:11:48,060 INFO L379 BuchiCegarLoop]: Difference is false [2018-10-27 06:11:48,060 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:11:48,060 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-10-27 06:11:48,081 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-10-27 06:11:48,121 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:11:48,122 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:48,122 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:48,132 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:11:48,132 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-10-27 06:11:48,132 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-10-27 06:11:48,132 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-10-27 06:11:48,134 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:11:48,135 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:48,135 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:48,135 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:11:48,136 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-10-27 06:11:48,144 INFO L793 eck$LassoCheckResult]: Stem: 9#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 20#L25true call main_#t~ret2 := fibo(main_~x~0);< 12#fiboENTRYtrue [2018-10-27 06:11:48,145 INFO L795 eck$LassoCheckResult]: Loop: 12#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 11#L8true assume !(~n == 1); 19#L11true call #t~ret0 := fibo(~n - 1);< 12#fiboENTRYtrue [2018-10-27 06:11:48,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:48,152 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2018-10-27 06:11:48,154 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:48,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:48,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:48,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:48,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:48,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2018-10-27 06:11:48,247 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:48,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:48,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:48,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:48,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:48,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2018-10-27 06:11:48,261 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:48,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:48,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:48,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:48,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:48,429 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:48,430 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:48,430 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:48,430 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:48,430 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:11:48,431 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:48,431 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:48,431 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:48,431 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration1_Loop [2018-10-27 06:11:48,431 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:48,431 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:48,450 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,480 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,482 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,633 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:48,634 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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) [2018-10-27 06:11:48,639 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:48,639 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:48,660 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:48,660 INFO L446 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_cade5e77-42c9-4950-a7e2-50100f026b72/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) [2018-10-27 06:11:48,693 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:48,693 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:48,708 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:48,708 INFO L446 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_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:48,725 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:48,725 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:48,728 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:48,728 INFO L446 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_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:48,745 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:48,745 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:48,747 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:48,747 INFO L446 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_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:48,766 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:48,766 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:48,788 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:11:48,788 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:48,820 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:11:48,824 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:48,824 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:48,825 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:48,825 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:48,825 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:11:48,825 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:48,825 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:48,825 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:48,825 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration1_Loop [2018-10-27 06:11:48,825 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:48,825 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:48,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,861 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:48,995 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:48,999 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:11:49,001 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 [2018-10-27 06:11:49,002 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:49,002 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:49,003 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:49,003 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:49,003 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:49,005 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:49,005 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:49,008 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:49,009 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 [2018-10-27 06:11:49,009 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:49,010 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:49,010 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:49,010 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:49,010 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:49,011 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:49,011 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:49,012 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:49,013 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 [2018-10-27 06:11:49,013 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:49,013 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:49,013 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:49,014 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:49,014 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:49,014 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:49,014 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:49,016 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:49,016 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 [2018-10-27 06:11:49,017 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:49,017 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:49,017 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:49,017 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:49,017 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:49,018 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:49,020 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:49,021 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:49,022 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 [2018-10-27 06:11:49,022 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:49,022 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:49,022 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:49,022 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:49,023 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:49,023 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:49,023 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:49,028 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:11:49,032 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:11:49,032 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:11:49,034 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:11:49,034 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:11:49,034 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:11:49,035 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-10-27 06:11:49,036 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:11:49,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:49,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:49,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:49,418 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 [2018-10-27 06:11:49,419 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states. Second operand 4 states. [2018-10-27 06:11:49,601 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states.. Second operand 4 states. Result 48 states and 60 transitions. Complement of second has 12 states. [2018-10-27 06:11:49,601 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 [2018-10-27 06:11:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-27 06:11:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2018-10-27 06:11:49,605 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2018-10-27 06:11:49,607 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:49,607 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2018-10-27 06:11:49,607 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:49,607 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2018-10-27 06:11:49,608 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:49,608 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2018-10-27 06:11:49,613 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:11:49,618 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2018-10-27 06:11:49,619 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-10-27 06:11:49,620 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2018-10-27 06:11:49,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2018-10-27 06:11:49,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:49,620 INFO L705 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2018-10-27 06:11:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2018-10-27 06:11:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-10-27 06:11:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-27 06:11:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2018-10-27 06:11:49,645 INFO L728 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-10-27 06:11:49,646 INFO L608 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-10-27 06:11:49,646 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-10-27 06:11:49,646 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2018-10-27 06:11:49,647 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:11:49,647 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:49,647 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:49,648 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:49,648 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:49,648 INFO L793 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 125#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 126#L25 call main_#t~ret2 := fibo(main_~x~0);< 131#fiboENTRY ~n := #in~n; 132#L6 assume !(~n < 1); 130#L8 assume !(~n == 1); 123#L11 call #t~ret0 := fibo(~n - 1);< 133#fiboENTRY ~n := #in~n; 134#L6 assume ~n < 1;#res := 0; 129#fiboFINAL assume true; 122#fiboEXIT >#33#return; 124#L11-1 [2018-10-27 06:11:49,648 INFO L795 eck$LassoCheckResult]: Loop: 124#L11-1 call #t~ret1 := fibo(~n - 2);< 138#fiboENTRY ~n := #in~n; 141#L6 assume !(~n < 1); 140#L8 assume !(~n == 1); 136#L11 call #t~ret0 := fibo(~n - 1);< 138#fiboENTRY ~n := #in~n; 141#L6 assume ~n < 1;#res := 0; 137#fiboFINAL assume true; 139#fiboEXIT >#33#return; 124#L11-1 [2018-10-27 06:11:49,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2018-10-27 06:11:49,649 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:49,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:49,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:49,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:49,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 06:11:49,855 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:11:49,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 06:11:49,858 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:11:49,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2018-10-27 06:11:49,858 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:49,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:49,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:49,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:49,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:50,153 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 06:11:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 06:11:50,160 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:11:50,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 06:11:50,161 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-10-27 06:11:50,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:11:50,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:11:50,163 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-10-27 06:11:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:11:50,292 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-10-27 06:11:50,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 06:11:50,293 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2018-10-27 06:11:50,294 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:11:50,295 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2018-10-27 06:11:50,295 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2018-10-27 06:11:50,295 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2018-10-27 06:11:50,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2018-10-27 06:11:50,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:50,295 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-10-27 06:11:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2018-10-27 06:11:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-27 06:11:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-27 06:11:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2018-10-27 06:11:50,298 INFO L728 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-10-27 06:11:50,298 INFO L608 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-10-27 06:11:50,298 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-10-27 06:11:50,298 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2018-10-27 06:11:50,299 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:11:50,299 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:50,299 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:50,299 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:50,299 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:50,300 INFO L793 eck$LassoCheckResult]: Stem: 192#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 190#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 191#L25 call main_#t~ret2 := fibo(main_~x~0);< 196#fiboENTRY ~n := #in~n; 197#L6 assume !(~n < 1); 195#L8 assume !(~n == 1); 188#L11 call #t~ret0 := fibo(~n - 1);< 198#fiboENTRY ~n := #in~n; 199#L6 assume !(~n < 1); 193#L8 assume ~n == 1;#res := 1; 194#fiboFINAL assume true; 187#fiboEXIT >#33#return; 189#L11-1 [2018-10-27 06:11:50,300 INFO L795 eck$LassoCheckResult]: Loop: 189#L11-1 call #t~ret1 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume !(~n == 1); 201#L11 call #t~ret0 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume ~n == 1;#res := 1; 207#fiboFINAL assume true; 205#fiboEXIT >#33#return; 189#L11-1 [2018-10-27 06:11:50,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:50,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2018-10-27 06:11:50,302 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:50,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:50,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:50,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:50,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:50,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:11:50,344 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:50,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:50,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:50,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:11:50,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-27 06:11:50,387 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:11:50,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:50,388 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2018-10-27 06:11:50,388 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:50,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:50,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:50,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:50,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:50,486 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:50,486 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:50,486 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:50,486 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:50,486 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:11:50,487 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:50,487 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:50,487 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:50,487 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration3_Loop [2018-10-27 06:11:50,487 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:50,487 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:50,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:50,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:50,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:50,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:50,572 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:50,572 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:50,575 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:50,575 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:50,598 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:11:50,598 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:51,526 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:11:51,527 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:51,527 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:51,528 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:51,528 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:51,528 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:11:51,528 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:51,528 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:51,528 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:51,529 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration3_Loop [2018-10-27 06:11:51,529 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:51,529 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:51,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:51,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:51,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:51,545 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:51,623 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:51,623 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:11:51,623 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 [2018-10-27 06:11:51,624 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:51,624 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:51,624 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:51,624 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:51,624 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:51,625 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:51,625 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:51,627 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:51,627 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 [2018-10-27 06:11:51,628 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:51,629 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:51,630 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:51,630 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:51,630 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:51,630 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:51,630 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:51,636 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:11:51,644 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:11:51,644 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:11:51,644 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:11:51,644 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:11:51,644 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:11:51,645 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-10-27 06:11:51,645 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:11:51,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:51,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:51,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:51,788 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 [2018-10-27 06:11:51,788 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-10-27 06:11:51,960 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 135 states and 183 transitions. Complement of second has 28 states. [2018-10-27 06:11:51,963 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 [2018-10-27 06:11:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:11:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-10-27 06:11:51,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 10 letters. [2018-10-27 06:11:51,964 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:51,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 22 letters. Loop has 10 letters. [2018-10-27 06:11:51,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:51,965 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 20 letters. [2018-10-27 06:11:51,965 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:51,966 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2018-10-27 06:11:51,972 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-10-27 06:11:51,977 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2018-10-27 06:11:51,977 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2018-10-27 06:11:51,977 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-10-27 06:11:51,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2018-10-27 06:11:51,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:51,978 INFO L705 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2018-10-27 06:11:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2018-10-27 06:11:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2018-10-27 06:11:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-27 06:11:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2018-10-27 06:11:51,990 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2018-10-27 06:11:51,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 06:11:51,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:11:51,999 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 7 states. [2018-10-27 06:11:52,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:11:52,074 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2018-10-27 06:11:52,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 06:11:52,075 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2018-10-27 06:11:52,080 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-10-27 06:11:52,083 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2018-10-27 06:11:52,083 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2018-10-27 06:11:52,083 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-10-27 06:11:52,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2018-10-27 06:11:52,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:52,084 INFO L705 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2018-10-27 06:11:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2018-10-27 06:11:52,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2018-10-27 06:11:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-27 06:11:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2018-10-27 06:11:52,095 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-10-27 06:11:52,095 INFO L608 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-10-27 06:11:52,095 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-10-27 06:11:52,095 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2018-10-27 06:11:52,097 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-10-27 06:11:52,097 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:52,097 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:52,098 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:52,098 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:52,098 INFO L793 eck$LassoCheckResult]: Stem: 720#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 710#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 711#L25 call main_#t~ret2 := fibo(main_~x~0);< 752#fiboENTRY ~n := #in~n; 755#L6 assume !(~n < 1); 726#L8 assume !(~n == 1); 727#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(~n == 1); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(~n == 1); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 740#L6 assume !(~n < 1); 775#L8 assume ~n == 1;#res := 1; 773#fiboFINAL assume true; 772#fiboEXIT >#33#return; 729#L11-1 call #t~ret1 := fibo(~n - 2);< 771#fiboENTRY ~n := #in~n; 801#L6 assume ~n < 1;#res := 0; 800#fiboFINAL assume true; 799#fiboEXIT >#35#return; 798#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 797#fiboFINAL assume true; 790#fiboEXIT >#33#return; 723#L11-1 [2018-10-27 06:11:52,098 INFO L795 eck$LassoCheckResult]: Loop: 723#L11-1 call #t~ret1 := fibo(~n - 2);< 750#fiboENTRY ~n := #in~n; 776#L6 assume !(~n < 1); 721#L8 assume !(~n == 1); 724#L11 call #t~ret0 := fibo(~n - 1);< 750#fiboENTRY ~n := #in~n; 776#L6 assume !(~n < 1); 721#L8 assume ~n == 1;#res := 1; 725#fiboFINAL assume true; 791#fiboEXIT >#33#return; 723#L11-1 [2018-10-27 06:11:52,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:52,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2018-10-27 06:11:52,099 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:52,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:52,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:52,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:52,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 06:11:52,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:11:52,182 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:52,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:52,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 06:11:52,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:11:52,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-27 06:11:52,232 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:11:52,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:52,233 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 2 times [2018-10-27 06:11:52,233 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:52,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:52,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:52,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:52,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:52,374 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:52,374 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:52,374 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:52,375 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:52,375 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:11:52,375 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:52,375 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:52,375 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:52,375 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration4_Loop [2018-10-27 06:11:52,375 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:52,375 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:52,376 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:52,384 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:52,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:52,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:52,416 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:52,416 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:52,419 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:52,419 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:52,473 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:11:52,474 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:53,410 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:11:53,411 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:53,411 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:53,411 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:53,411 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:53,412 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:11:53,412 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:53,412 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:53,412 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:53,412 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration4_Loop [2018-10-27 06:11:53,412 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:53,412 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:53,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:53,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:53,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:53,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:53,463 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:53,464 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:11:53,464 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 [2018-10-27 06:11:53,464 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:53,465 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:53,465 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:53,465 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:53,465 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:53,465 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:53,465 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:53,466 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:53,466 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 [2018-10-27 06:11:53,467 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:53,467 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:53,467 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:53,467 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:53,467 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:53,468 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:53,468 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:53,468 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:53,469 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 [2018-10-27 06:11:53,469 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:53,469 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:53,469 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:53,469 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:53,469 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:53,470 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:53,470 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:53,472 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:11:53,472 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 [2018-10-27 06:11:53,472 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:53,473 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:53,473 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:53,473 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:53,473 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:53,473 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:53,474 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:53,477 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:11:53,480 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:11:53,480 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:11:53,480 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:11:53,480 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:11:53,480 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:11:53,481 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-10-27 06:11:53,481 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:11:53,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:53,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:53,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:53,606 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 [2018-10-27 06:11:53,606 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-10-27 06:11:53,746 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 163 states and 217 transitions. Complement of second has 25 states. [2018-10-27 06:11:53,748 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 [2018-10-27 06:11:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:11:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-10-27 06:11:53,749 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 28 letters. Loop has 10 letters. [2018-10-27 06:11:53,749 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:53,749 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:53,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:53,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:53,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:53,886 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 [2018-10-27 06:11:53,886 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-10-27 06:11:53,998 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 288 states and 387 transitions. Complement of second has 25 states. [2018-10-27 06:11:54,000 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 [2018-10-27 06:11:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:11:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2018-10-27 06:11:54,001 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2018-10-27 06:11:54,001 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:54,001 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:54,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:54,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:54,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:54,437 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 [2018-10-27 06:11:54,437 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-10-27 06:11:54,758 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 826 states and 1091 transitions. Complement of second has 112 states. [2018-10-27 06:11:54,764 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 [2018-10-27 06:11:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:11:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 40 transitions. [2018-10-27 06:11:54,765 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 10 letters. [2018-10-27 06:11:54,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:54,766 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 38 letters. Loop has 10 letters. [2018-10-27 06:11:54,766 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:54,766 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 20 letters. [2018-10-27 06:11:54,768 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:54,770 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 826 states and 1091 transitions. [2018-10-27 06:11:54,783 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-10-27 06:11:54,792 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 826 states to 413 states and 595 transitions. [2018-10-27 06:11:54,793 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-10-27 06:11:54,793 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 180 [2018-10-27 06:11:54,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 413 states and 595 transitions. [2018-10-27 06:11:54,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:54,794 INFO L705 BuchiCegarLoop]: Abstraction has 413 states and 595 transitions. [2018-10-27 06:11:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states and 595 transitions. [2018-10-27 06:11:54,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 336. [2018-10-27 06:11:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2018-10-27 06:11:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 463 transitions. [2018-10-27 06:11:54,825 INFO L728 BuchiCegarLoop]: Abstraction has 336 states and 463 transitions. [2018-10-27 06:11:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 06:11:54,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-10-27 06:11:54,826 INFO L87 Difference]: Start difference. First operand 336 states and 463 transitions. Second operand 10 states. [2018-10-27 06:11:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:11:55,413 INFO L93 Difference]: Finished difference Result 498 states and 788 transitions. [2018-10-27 06:11:55,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 06:11:55,419 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 498 states and 788 transitions. [2018-10-27 06:11:55,427 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-10-27 06:11:55,442 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 498 states to 496 states and 785 transitions. [2018-10-27 06:11:55,443 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 243 [2018-10-27 06:11:55,443 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 243 [2018-10-27 06:11:55,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 496 states and 785 transitions. [2018-10-27 06:11:55,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:55,444 INFO L705 BuchiCegarLoop]: Abstraction has 496 states and 785 transitions. [2018-10-27 06:11:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states and 785 transitions. [2018-10-27 06:11:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 366. [2018-10-27 06:11:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-10-27 06:11:55,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 518 transitions. [2018-10-27 06:11:55,491 INFO L728 BuchiCegarLoop]: Abstraction has 366 states and 518 transitions. [2018-10-27 06:11:55,492 INFO L608 BuchiCegarLoop]: Abstraction has 366 states and 518 transitions. [2018-10-27 06:11:55,492 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-10-27 06:11:55,492 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 366 states and 518 transitions. [2018-10-27 06:11:55,495 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-10-27 06:11:55,495 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:11:55,495 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:11:55,498 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:11:55,498 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-10-27 06:11:55,498 INFO L793 eck$LassoCheckResult]: Stem: 3580#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3578#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 3579#L25 call main_#t~ret2 := fibo(main_~x~0);< 3623#fiboENTRY ~n := #in~n; 3639#L6 assume !(~n < 1); 3638#L8 assume !(~n == 1); 3634#L11 call #t~ret0 := fibo(~n - 1);< 3636#fiboENTRY ~n := #in~n; 3637#L6 assume !(~n < 1); 3633#L8 assume !(~n == 1); 3582#L11 call #t~ret0 := fibo(~n - 1);< 3630#fiboENTRY ~n := #in~n; 3632#L6 assume !(~n < 1); 3635#L8 assume !(~n == 1); 3583#L11 call #t~ret0 := fibo(~n - 1);< 3630#fiboENTRY ~n := #in~n; 3631#L6 assume !(~n < 1); 3581#L8 assume ~n == 1;#res := 1; 3584#fiboFINAL assume true; 3677#fiboEXIT >#33#return; 3660#L11-1 call #t~ret1 := fibo(~n - 2);< 3667#fiboENTRY ~n := #in~n; 3856#L6 assume !(~n < 1); 3698#L8 assume !(~n == 1); 3700#L11 call #t~ret0 := fibo(~n - 1);< 3911#fiboENTRY ~n := #in~n; 3915#L6 assume !(~n < 1); 3913#L8 assume !(~n == 1); 3625#L11 call #t~ret0 := fibo(~n - 1);< 3922#fiboENTRY [2018-10-27 06:11:55,499 INFO L795 eck$LassoCheckResult]: Loop: 3922#fiboENTRY ~n := #in~n; 3624#L6 assume !(~n < 1); 3628#L8 assume !(~n == 1); 3626#L11 call #t~ret0 := fibo(~n - 1);< 3922#fiboENTRY [2018-10-27 06:11:55,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:55,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1816361660, now seen corresponding path program 1 times [2018-10-27 06:11:55,499 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:55,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:55,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:55,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:11:55,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 06:11:55,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:11:55,641 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:55,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:55,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-27 06:11:55,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:11:55,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-10-27 06:11:55,795 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:11:55,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:55,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2018-10-27 06:11:55,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:11:55,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:11:55,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:55,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:11:55,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:11:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:11:55,828 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:55,828 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:55,828 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:55,828 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:55,828 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:11:55,828 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:55,828 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:55,828 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:55,828 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration5_Loop [2018-10-27 06:11:55,828 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:55,829 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:55,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:55,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:55,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:55,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:55,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:55,865 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:55,866 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:55,868 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:55,868 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:55,870 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:11:55,871 INFO L446 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_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:55,887 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:11:55,887 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cade5e77-42c9-4950-a7e2-50100f026b72/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 [2018-10-27 06:11:55,907 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:11:55,907 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:11:55,925 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:11:55,927 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:11:55,927 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:11:55,927 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:11:55,927 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:11:55,927 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:11:55,927 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:11:55,927 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:11:55,927 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:11:55,927 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_true-unreach-call_true-termination.c_Iteration5_Loop [2018-10-27 06:11:55,928 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:11:55,928 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:11:55,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:55,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:55,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:55,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:55,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:11:56,018 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:11:56,018 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:11:56,018 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 [2018-10-27 06:11:56,019 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:11:56,019 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:11:56,019 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:11:56,019 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:11:56,019 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:11:56,019 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:11:56,020 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:11:56,022 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:11:56,023 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:11:56,023 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:11:56,024 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:11:56,028 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:11:56,028 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:11:56,028 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-10-27 06:11:56,028 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:11:56,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:56,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:56,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:56,142 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 [2018-10-27 06:11:56,142 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-10-27 06:11:56,199 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 376 states and 528 transitions. Complement of second has 13 states. [2018-10-27 06:11:56,200 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 [2018-10-27 06:11:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:11:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-10-27 06:11:56,201 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-10-27 06:11:56,201 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:56,201 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:56,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:56,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:56,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:56,633 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 [2018-10-27 06:11:56,633 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-10-27 06:11:56,674 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 376 states and 528 transitions. Complement of second has 13 states. [2018-10-27 06:11:56,677 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 [2018-10-27 06:11:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:11:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-10-27 06:11:56,678 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-10-27 06:11:56,678 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:56,678 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:11:56,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:11:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:56,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:11:56,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:11:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:11:56,751 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 [2018-10-27 06:11:56,751 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-10-27 06:11:56,824 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 493 states and 655 transitions. Complement of second has 14 states. [2018-10-27 06:11:56,825 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 [2018-10-27 06:11:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:11:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2018-10-27 06:11:56,825 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2018-10-27 06:11:56,826 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:56,826 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2018-10-27 06:11:56,826 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:56,826 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2018-10-27 06:11:56,826 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:11:56,827 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 493 states and 655 transitions. [2018-10-27 06:11:56,834 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-10-27 06:11:56,839 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 493 states to 406 states and 566 transitions. [2018-10-27 06:11:56,839 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-10-27 06:11:56,840 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 161 [2018-10-27 06:11:56,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 406 states and 566 transitions. [2018-10-27 06:11:56,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:11:56,841 INFO L705 BuchiCegarLoop]: Abstraction has 406 states and 566 transitions. [2018-10-27 06:11:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states and 566 transitions. [2018-10-27 06:11:56,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 390. [2018-10-27 06:11:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2018-10-27 06:11:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 542 transitions. [2018-10-27 06:11:56,855 INFO L728 BuchiCegarLoop]: Abstraction has 390 states and 542 transitions. [2018-10-27 06:11:56,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 06:11:56,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-10-27 06:11:56,857 INFO L87 Difference]: Start difference. First operand 390 states and 542 transitions. Second operand 20 states. [2018-10-27 06:11:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:11:57,925 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2018-10-27 06:11:57,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 06:11:57,926 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 209 transitions. [2018-10-27 06:11:57,927 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:11:57,928 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2018-10-27 06:11:57,928 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-10-27 06:11:57,928 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-10-27 06:11:57,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-10-27 06:11:57,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-10-27 06:11:57,928 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:11:57,928 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:11:57,928 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:11:57,928 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-10-27 06:11:57,928 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-10-27 06:11:57,928 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:11:57,928 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-10-27 06:11:57,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.10 06:11:57 BoogieIcfgContainer [2018-10-27 06:11:57,938 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-10-27 06:11:57,939 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 06:11:57,939 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 06:11:57,939 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 06:11:57,941 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:11:47" (3/4) ... [2018-10-27 06:11:57,945 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-27 06:11:57,945 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 06:11:57,945 INFO L168 Benchmark]: Toolchain (without parser) took 10604.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 960.7 MB in the beginning and 984.5 MB in the end (delta: -23.7 MB). Peak memory consumption was 159.8 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:57,948 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:11:57,949 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.35 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 948.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:57,950 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.43 ms. Allocated memory is still 1.0 GB. Free memory is still 948.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:11:57,951 INFO L168 Benchmark]: Boogie Preprocessor took 10.70 ms. Allocated memory is still 1.0 GB. Free memory was 948.8 MB in the beginning and 946.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:57,953 INFO L168 Benchmark]: RCFGBuilder took 426.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:57,954 INFO L168 Benchmark]: BuchiAutomizer took 9966.72 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 30.4 MB). Free memory was 1.1 GB in the beginning and 984.5 MB in the end (delta: 157.9 MB). Peak memory consumption was 188.3 MB. Max. memory is 11.5 GB. [2018-10-27 06:11:57,955 INFO L168 Benchmark]: Witness Printer took 5.98 ms. Allocated memory is still 1.2 GB. Free memory is still 984.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:11:57,958 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.35 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 948.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.43 ms. Allocated memory is still 1.0 GB. Free memory is still 948.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.70 ms. Allocated memory is still 1.0 GB. Free memory was 948.8 MB in the beginning and 946.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 426.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -196.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 9966.72 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 30.4 MB). Free memory was 1.1 GB in the beginning and 984.5 MB in the end (delta: 157.9 MB). Peak memory consumption was 188.3 MB. Max. memory is 11.5 GB. * Witness Printer took 5.98 ms. Allocated memory is still 1.2 GB. Free memory is still 984.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 9.8s and 6 iterations. TraceHistogramMax:6. Analysis of lassos took 4.7s. Construction of modules took 1.7s. Büchi inclusion checks took 3.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 254 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 366 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 161 SDtfs, 363 SDslu, 221 SDs, 0 SdLazy, 743 SolverSat, 193 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s 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: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...