./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 11:57:50,600 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:57:50,601 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:57:50,609 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:57:50,609 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:57:50,609 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:57:50,610 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:57:50,611 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:57:50,612 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:57:50,613 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:57:50,614 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:57:50,614 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:57:50,615 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:57:50,615 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:57:50,616 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:57:50,617 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:57:50,617 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:57:50,619 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:57:50,620 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:57:50,621 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:57:50,622 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:57:50,623 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:57:50,625 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:57:50,625 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:57:50,625 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:57:50,626 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:57:50,626 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:57:50,627 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:57:50,628 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:57:50,628 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:57:50,628 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:57:50,629 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:57:50,629 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:57:50,629 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:57:50,630 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:57:50,630 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:57:50,630 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-18 11:57:50,639 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:57:50,640 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:57:50,641 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 11:57:50,641 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 11:57:50,641 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 11:57:50,641 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-18 11:57:50,641 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-18 11:57:50,641 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-18 11:57:50,641 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-18 11:57:50,642 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-18 11:57:50,642 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-18 11:57:50,642 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:57:50,642 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:57:50,642 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 11:57:50,642 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:57:50,642 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:57:50,642 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:57:50,643 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-18 11:57:50,643 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-18 11:57:50,643 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-18 11:57:50,643 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:57:50,643 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:57:50,643 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-18 11:57:50,643 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:57:50,643 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-18 11:57:50,644 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:57:50,644 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:57:50,644 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-18 11:57:50,644 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:57:50,646 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 11:57:50,647 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-18 11:57:50,647 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-18 11:57:50,648 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_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2018-11-18 11:57:50,671 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:57:50,680 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:57:50,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:57:50,684 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:57:50,684 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:57:50,685 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-11-18 11:57:50,730 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/data/36f05e03f/90eb8cf55ed04d2f9404b0215795884a/FLAGda4be31fc [2018-11-18 11:57:51,074 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:57:51,075 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-11-18 11:57:51,080 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/data/36f05e03f/90eb8cf55ed04d2f9404b0215795884a/FLAGda4be31fc [2018-11-18 11:57:51,498 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/data/36f05e03f/90eb8cf55ed04d2f9404b0215795884a [2018-11-18 11:57:51,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:57:51,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:57:51,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:57:51,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:57:51,505 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:57:51,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c1d420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51, skipping insertion in model container [2018-11-18 11:57:51,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:57:51,525 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:57:51,627 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:57:51,629 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:57:51,638 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:57:51,647 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:57:51,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51 WrapperNode [2018-11-18 11:57:51,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:57:51,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:57:51,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:57:51,648 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:57:51,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:57:51,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:57:51,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:57:51,665 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:57:51,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... [2018-11-18 11:57:51,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:57:51,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:57:51,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:57:51,674 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:57:51,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:57:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:57:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-18 11:57:51,745 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-18 11:57:51,832 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:57:51,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:57:51 BoogieIcfgContainer [2018-11-18 11:57:51,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:57:51,833 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-18 11:57:51,833 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-18 11:57:51,835 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-18 11:57:51,835 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 11:57:51,835 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 11:57:51" (1/3) ... [2018-11-18 11:57:51,836 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a89eaff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 11:57:51, skipping insertion in model container [2018-11-18 11:57:51,836 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 11:57:51,836 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:57:51" (2/3) ... [2018-11-18 11:57:51,836 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1a89eaff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 11:57:51, skipping insertion in model container [2018-11-18 11:57:51,836 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 11:57:51,837 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:57:51" (3/3) ... [2018-11-18 11:57:51,838 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_5_false-unreach-call_true-termination.c [2018-11-18 11:57:51,881 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 11:57:51,881 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-18 11:57:51,881 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-18 11:57:51,882 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-18 11:57:51,882 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:57:51,882 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:57:51,882 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-18 11:57:51,882 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:57:51,882 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-18 11:57:51,894 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-11-18 11:57:51,909 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 11:57:51,909 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:57:51,909 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:57:51,918 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 11:57:51,918 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-18 11:57:51,918 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-18 11:57:51,918 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-11-18 11:57:51,920 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 11:57:51,920 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:57:51,920 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:57:51,921 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 11:57:51,921 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-18 11:57:51,928 INFO L794 eck$LassoCheckResult]: Stem: 9#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 20#L25true call main_#t~ret2 := fibo(main_~x~0);< 12#fiboENTRYtrue [2018-11-18 11:57:51,928 INFO L796 eck$LassoCheckResult]: Loop: 12#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 11#L8true assume !(1 == ~n); 19#L11true call #t~ret0 := fibo(~n - 1);< 12#fiboENTRYtrue [2018-11-18 11:57:51,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:51,932 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2018-11-18 11:57:51,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:51,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:51,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:51,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:51,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:52,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:52,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2018-11-18 11:57:52,005 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:52,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:52,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:52,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:52,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:52,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2018-11-18 11:57:52,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:52,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:52,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:52,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:52,093 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:57:52,094 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:57:52,094 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:57:52,094 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:57:52,094 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 11:57:52,094 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:52,094 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:57:52,095 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:57:52,095 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-18 11:57:52,095 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:57:52,095 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:57:52,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,176 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:57:52,177 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:52,189 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:57:52,190 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:57:52,195 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 11:57:52,195 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:52,211 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:57:52,211 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:57:52,213 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 11:57:52,214 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:52,229 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:57:52,229 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:57:52,231 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 11:57:52,231 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:52,246 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:57:52,247 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:57:52,249 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 11:57:52,249 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:52,264 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:57:52,264 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:52,282 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 11:57:52,282 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:57:52,300 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 11:57:52,301 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:57:52,302 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:57:52,302 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:57:52,302 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:57:52,302 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 11:57:52,302 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:52,302 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:57:52,302 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:57:52,302 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-18 11:57:52,302 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:57:52,303 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:57:52,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,312 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,377 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:57:52,381 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 11:57:52,383 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:52,384 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:52,384 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:52,385 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:52,385 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:52,385 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:52,387 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:52,387 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:52,390 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:57:52,391 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:52,391 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:52,391 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:52,392 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:52,392 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:52,392 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:52,392 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:52,392 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:52,393 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:57:52,394 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:52,394 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:52,394 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:52,394 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:52,395 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:52,395 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:52,395 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:52,395 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:52,396 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:57:52,397 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:52,397 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:52,397 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:52,397 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:52,397 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:52,397 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:52,398 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:52,398 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:52,399 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:57:52,399 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:52,400 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:52,400 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:52,400 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:52,400 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:52,400 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:52,401 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:52,401 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:52,406 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 11:57:52,409 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 11:57:52,409 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 11:57:52,411 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 11:57:52,411 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 11:57:52,411 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 11:57:52,412 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-18 11:57:52,412 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 11:57:52,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:52,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:52,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:52,498 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-18 11:57:52,499 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states. Second operand 4 states. [2018-11-18 11:57:52,579 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. [2018-11-18 11:57:52,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 11:57:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-18 11:57:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2018-11-18 11:57:52,583 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2018-11-18 11:57:52,584 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:52,584 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2018-11-18 11:57:52,584 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:52,584 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2018-11-18 11:57:52,585 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:52,585 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2018-11-18 11:57:52,588 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 11:57:52,592 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2018-11-18 11:57:52,593 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-11-18 11:57:52,593 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2018-11-18 11:57:52,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2018-11-18 11:57:52,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 11:57:52,594 INFO L705 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2018-11-18 11:57:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2018-11-18 11:57:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-11-18 11:57:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-18 11:57:52,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2018-11-18 11:57:52,614 INFO L728 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-11-18 11:57:52,614 INFO L608 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-11-18 11:57:52,614 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-18 11:57:52,614 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2018-11-18 11:57:52,615 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 11:57:52,615 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:57:52,615 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:57:52,615 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:52,615 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:52,616 INFO L794 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 125#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 126#L25 call main_#t~ret2 := fibo(main_~x~0);< 131#fiboENTRY ~n := #in~n; 132#L6 assume !(~n < 1); 130#L8 assume !(1 == ~n); 123#L11 call #t~ret0 := fibo(~n - 1);< 133#fiboENTRY ~n := #in~n; 134#L6 assume ~n < 1;#res := 0; 129#fiboFINAL assume true; 122#fiboEXIT >#33#return; 124#L11-1 [2018-11-18 11:57:52,616 INFO L796 eck$LassoCheckResult]: Loop: 124#L11-1 call #t~ret1 := fibo(~n - 2);< 138#fiboENTRY ~n := #in~n; 141#L6 assume !(~n < 1); 140#L8 assume !(1 == ~n); 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 [2018-11-18 11:57:52,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:52,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2018-11-18 11:57:52,616 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:52,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:52,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:52,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:52,678 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:57:52,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 11:57:52,680 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 11:57:52,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2018-11-18 11:57:52,680 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:52,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:52,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:52,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:52,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:57:52,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 11:57:52,717 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 11:57:52,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:57:52,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:57:52,721 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-18 11:57:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:52,805 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-11-18 11:57:52,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:57:52,805 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2018-11-18 11:57:52,807 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 11:57:52,808 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2018-11-18 11:57:52,808 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2018-11-18 11:57:52,808 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2018-11-18 11:57:52,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2018-11-18 11:57:52,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 11:57:52,809 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-11-18 11:57:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2018-11-18 11:57:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 11:57:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 11:57:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2018-11-18 11:57:52,812 INFO L728 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-11-18 11:57:52,812 INFO L608 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-11-18 11:57:52,812 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-18 11:57:52,812 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2018-11-18 11:57:52,813 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 11:57:52,813 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:57:52,813 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:57:52,813 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:52,813 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:52,814 INFO L794 eck$LassoCheckResult]: Stem: 192#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 190#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 191#L25 call main_#t~ret2 := fibo(main_~x~0);< 196#fiboENTRY ~n := #in~n; 197#L6 assume !(~n < 1); 195#L8 assume !(1 == ~n); 188#L11 call #t~ret0 := fibo(~n - 1);< 198#fiboENTRY ~n := #in~n; 199#L6 assume !(~n < 1); 193#L8 assume 1 == ~n;#res := 1; 194#fiboFINAL assume true; 187#fiboEXIT >#33#return; 189#L11-1 [2018-11-18 11:57:52,814 INFO L796 eck$LassoCheckResult]: Loop: 189#L11-1 call #t~ret1 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume !(1 == ~n); 201#L11 call #t~ret0 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume 1 == ~n;#res := 1; 207#fiboFINAL assume true; 205#fiboEXIT >#33#return; 189#L11-1 [2018-11-18 11:57:52,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2018-11-18 11:57:52,814 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:52,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:52,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:52,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:52,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:52,848 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:57:52,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:52,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:52,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 11:57:52,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-18 11:57:52,883 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 11:57:52,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:52,883 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2018-11-18 11:57:52,883 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:52,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:52,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:52,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:52,966 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:57:52,966 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:57:52,966 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:57:52,966 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:57:52,966 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 11:57:52,966 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:52,966 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:57:52,966 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:57:52,967 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-18 11:57:52,967 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:57:52,967 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:57:52,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,974 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:52,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:53,022 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:57:53,023 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:53,025 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:57:53,025 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:53,042 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 11:57:53,042 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:57:53,547 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 11:57:53,548 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:57:53,548 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:57:53,548 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:57:53,549 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:57:53,549 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 11:57:53,549 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:53,549 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:57:53,549 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:57:53,549 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-18 11:57:53,549 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:57:53,549 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:57:53,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:53,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:53,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:53,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:53,604 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:57:53,605 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 11:57:53,605 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:53,606 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:53,606 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:53,606 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:53,606 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:53,606 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:53,607 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:53,607 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:53,609 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:57:53,609 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:53,609 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:53,609 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:53,610 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:53,610 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:53,610 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:53,611 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:53,611 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:53,614 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 11:57:53,616 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 11:57:53,617 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 11:57:53,617 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 11:57:53,617 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 11:57:53,617 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 11:57:53,617 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-18 11:57:53,618 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 11:57:53,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:53,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:53,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:53,705 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 11:57:53,705 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-18 11:57:53,807 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. [2018-11-18 11:57:53,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 11:57:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 11:57:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-11-18 11:57:53,808 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 10 letters. [2018-11-18 11:57:53,809 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:53,809 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 22 letters. Loop has 10 letters. [2018-11-18 11:57:53,809 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:53,809 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 20 letters. [2018-11-18 11:57:53,809 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:53,810 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2018-11-18 11:57:53,815 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-18 11:57:53,819 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2018-11-18 11:57:53,819 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2018-11-18 11:57:53,820 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-11-18 11:57:53,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2018-11-18 11:57:53,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 11:57:53,820 INFO L705 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2018-11-18 11:57:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2018-11-18 11:57:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2018-11-18 11:57:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-18 11:57:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2018-11-18 11:57:53,831 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2018-11-18 11:57:53,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 11:57:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 11:57:53,831 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 7 states. [2018-11-18 11:57:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:53,879 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2018-11-18 11:57:53,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 11:57:53,879 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2018-11-18 11:57:53,881 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-18 11:57:53,883 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2018-11-18 11:57:53,883 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2018-11-18 11:57:53,884 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-11-18 11:57:53,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2018-11-18 11:57:53,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 11:57:53,884 INFO L705 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2018-11-18 11:57:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2018-11-18 11:57:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2018-11-18 11:57:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-18 11:57:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2018-11-18 11:57:53,891 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-11-18 11:57:53,891 INFO L608 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-11-18 11:57:53,891 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-18 11:57:53,891 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2018-11-18 11:57:53,893 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-18 11:57:53,893 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:57:53,893 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:57:53,894 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:53,894 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:53,894 INFO L794 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 !(1 == ~n); 727#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(1 == ~n); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(1 == ~n); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 740#L6 assume !(~n < 1); 775#L8 assume 1 == ~n;#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~ret0;havoc #t~ret1; 797#fiboFINAL assume true; 790#fiboEXIT >#33#return; 723#L11-1 [2018-11-18 11:57:53,894 INFO L796 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 !(1 == ~n); 724#L11 call #t~ret0 := fibo(~n - 1);< 750#fiboENTRY ~n := #in~n; 776#L6 assume !(~n < 1); 721#L8 assume 1 == ~n;#res := 1; 725#fiboFINAL assume true; 791#fiboEXIT >#33#return; 723#L11-1 [2018-11-18 11:57:53,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2018-11-18 11:57:53,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:53,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:53,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:53,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:53,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 11:57:53,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:53,950 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:57:53,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:53,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 11:57:54,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 11:57:54,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 11:57:54,000 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 11:57:54,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 2 times [2018-11-18 11:57:54,001 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:54,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:54,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:54,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:54,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:54,062 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:57:54,063 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:57:54,063 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:57:54,063 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:57:54,063 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 11:57:54,063 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:54,063 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:57:54,063 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:57:54,063 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-18 11:57:54,063 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:57:54,063 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:57:54,064 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:54,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:54,070 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:54,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:54,090 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:57:54,090 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:54,092 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:57:54,092 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:54,110 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 11:57:54,110 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:57:54,612 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 11:57:54,614 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:57:54,614 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:57:54,614 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:57:54,614 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:57:54,614 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 11:57:54,615 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:54,615 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:57:54,615 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:57:54,615 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration4_Loop [2018-11-18 11:57:54,615 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:57:54,615 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:57:54,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:54,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:54,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:54,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:54,643 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:57:54,643 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 11:57:54,644 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:54,644 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:54,644 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:54,644 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:54,644 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:54,645 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:54,645 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:54,645 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:54,646 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:57:54,646 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:54,646 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:54,647 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:54,647 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:54,647 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:54,647 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:54,647 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:54,647 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:54,648 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:57:54,648 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:54,649 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:54,649 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:54,649 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:54,649 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:54,649 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:54,650 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:54,650 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:54,651 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:57:54,651 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:54,652 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:54,652 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:54,652 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:54,652 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:54,652 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:54,653 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:54,653 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:54,656 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 11:57:54,658 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 11:57:54,659 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 11:57:54,659 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 11:57:54,659 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 11:57:54,659 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 11:57:54,659 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-18 11:57:54,660 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 11:57:54,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:54,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:54,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:54,738 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 11:57:54,738 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-18 11:57:54,843 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. [2018-11-18 11:57:54,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 11:57:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 11:57:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-11-18 11:57:54,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 28 letters. Loop has 10 letters. [2018-11-18 11:57:54,846 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:54,846 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 11:57:54,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:54,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:54,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:54,931 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 11:57:54,931 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-18 11:57:55,027 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. [2018-11-18 11:57:55,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 11:57:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 11:57:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2018-11-18 11:57:55,029 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2018-11-18 11:57:55,029 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:55,029 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 11:57:55,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:55,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:55,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:55,122 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 11:57:55,122 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-18 11:57:55,240 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. [2018-11-18 11:57:55,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-11-18 11:57:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 11:57:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 40 transitions. [2018-11-18 11:57:55,243 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 10 letters. [2018-11-18 11:57:55,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:55,244 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 38 letters. Loop has 10 letters. [2018-11-18 11:57:55,245 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:55,245 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 20 letters. [2018-11-18 11:57:55,246 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:55,246 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 826 states and 1091 transitions. [2018-11-18 11:57:55,257 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-18 11:57:55,266 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 826 states to 413 states and 595 transitions. [2018-11-18 11:57:55,266 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-11-18 11:57:55,267 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 180 [2018-11-18 11:57:55,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 413 states and 595 transitions. [2018-11-18 11:57:55,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 11:57:55,267 INFO L705 BuchiCegarLoop]: Abstraction has 413 states and 595 transitions. [2018-11-18 11:57:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states and 595 transitions. [2018-11-18 11:57:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 336. [2018-11-18 11:57:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2018-11-18 11:57:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 463 transitions. [2018-11-18 11:57:55,292 INFO L728 BuchiCegarLoop]: Abstraction has 336 states and 463 transitions. [2018-11-18 11:57:55,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 11:57:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-18 11:57:55,293 INFO L87 Difference]: Start difference. First operand 336 states and 463 transitions. Second operand 10 states. [2018-11-18 11:57:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:55,429 INFO L93 Difference]: Finished difference Result 498 states and 788 transitions. [2018-11-18 11:57:55,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 11:57:55,430 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 498 states and 788 transitions. [2018-11-18 11:57:55,435 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-18 11:57:55,441 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 498 states to 496 states and 785 transitions. [2018-11-18 11:57:55,441 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 243 [2018-11-18 11:57:55,441 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 243 [2018-11-18 11:57:55,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 496 states and 785 transitions. [2018-11-18 11:57:55,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 11:57:55,442 INFO L705 BuchiCegarLoop]: Abstraction has 496 states and 785 transitions. [2018-11-18 11:57:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states and 785 transitions. [2018-11-18 11:57:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 366. [2018-11-18 11:57:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-11-18 11:57:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 518 transitions. [2018-11-18 11:57:55,459 INFO L728 BuchiCegarLoop]: Abstraction has 366 states and 518 transitions. [2018-11-18 11:57:55,459 INFO L608 BuchiCegarLoop]: Abstraction has 366 states and 518 transitions. [2018-11-18 11:57:55,459 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-18 11:57:55,459 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 366 states and 518 transitions. [2018-11-18 11:57:55,461 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-18 11:57:55,461 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:57:55,461 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:57:55,462 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:57:55,462 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-18 11:57:55,462 INFO L794 eck$LassoCheckResult]: Stem: 3580#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3578#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 3579#L25 call main_#t~ret2 := fibo(main_~x~0);< 3620#fiboENTRY ~n := #in~n; 3636#L6 assume !(~n < 1); 3635#L8 assume !(1 == ~n); 3631#L11 call #t~ret0 := fibo(~n - 1);< 3633#fiboENTRY ~n := #in~n; 3634#L6 assume !(~n < 1); 3630#L8 assume !(1 == ~n); 3582#L11 call #t~ret0 := fibo(~n - 1);< 3627#fiboENTRY ~n := #in~n; 3629#L6 assume !(~n < 1); 3632#L8 assume !(1 == ~n); 3583#L11 call #t~ret0 := fibo(~n - 1);< 3627#fiboENTRY ~n := #in~n; 3628#L6 assume !(~n < 1); 3581#L8 assume 1 == ~n;#res := 1; 3584#fiboFINAL assume true; 3670#fiboEXIT >#33#return; 3653#L11-1 call #t~ret1 := fibo(~n - 2);< 3660#fiboENTRY ~n := #in~n; 3730#L6 assume !(~n < 1); 3695#L8 assume !(1 == ~n); 3697#L11 call #t~ret0 := fibo(~n - 1);< 3863#fiboENTRY ~n := #in~n; 3869#L6 assume !(~n < 1); 3866#L8 assume !(1 == ~n); 3867#L11 call #t~ret0 := fibo(~n - 1);< 3880#fiboENTRY [2018-11-18 11:57:55,462 INFO L796 eck$LassoCheckResult]: Loop: 3880#fiboENTRY ~n := #in~n; 3894#L6 assume !(~n < 1); 3893#L8 assume !(1 == ~n); 3876#L11 call #t~ret0 := fibo(~n - 1);< 3880#fiboENTRY [2018-11-18 11:57:55,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:55,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1816361660, now seen corresponding path program 1 times [2018-11-18 11:57:55,462 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:55,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:55,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:55,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:57:55,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:57:55,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:57:55,550 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:57:55,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:55,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:57:55,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 11:57:55,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-11-18 11:57:55,717 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 11:57:55,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2018-11-18 11:57:55,718 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:57:55,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:57:55,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:55,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:57:55,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:57:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:57:55,736 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:57:55,736 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:57:55,736 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:57:55,737 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:57:55,737 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 11:57:55,737 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:55,737 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:57:55,737 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:57:55,737 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-18 11:57:55,737 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:57:55,737 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:57:55,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,766 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:57:55,766 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:55,768 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:57:55,768 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:57:55,770 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 11:57:55,771 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:55,787 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:57:55,787 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_dc2f7aff-0e20-4a9e-9bf5-18910ceb372b/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:55,804 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 11:57:55,804 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:57:55,821 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 11:57:55,822 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:57:55,823 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:57:55,823 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:57:55,823 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:57:55,823 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 11:57:55,823 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:57:55,823 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:57:55,823 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:57:55,823 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration5_Loop [2018-11-18 11:57:55,823 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:57:55,823 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:57:55,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:57:55,858 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:57:55,859 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 11:57:55,859 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 11:57:55,859 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:57:55,859 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:57:55,859 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:57:55,859 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:57:55,860 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:57:55,860 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:57:55,860 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:57:55,861 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 11:57:55,863 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 11:57:55,863 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 11:57:55,863 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 11:57:55,863 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 11:57:55,864 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 11:57:55,864 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-18 11:57:55,864 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 11:57:55,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:55,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:55,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:55,950 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 11:57:55,950 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-11-18 11:57:55,988 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. [2018-11-18 11:57:55,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 11:57:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 11:57:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-11-18 11:57:55,989 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-11-18 11:57:55,990 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:55,990 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 11:57:56,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:56,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:56,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:56,071 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 11:57:56,071 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-11-18 11:57:56,121 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. [2018-11-18 11:57:56,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 11:57:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 11:57:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-11-18 11:57:56,123 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-11-18 11:57:56,124 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:56,124 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 11:57:56,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:57:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:56,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:57:56,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:57:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:57:56,182 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 11:57:56,182 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-11-18 11:57:56,225 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. [2018-11-18 11:57:56,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 11:57:56,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 11:57:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2018-11-18 11:57:56,226 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2018-11-18 11:57:56,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:56,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2018-11-18 11:57:56,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:56,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2018-11-18 11:57:56,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:57:56,227 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 493 states and 655 transitions. [2018-11-18 11:57:56,230 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-18 11:57:56,234 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 493 states to 406 states and 566 transitions. [2018-11-18 11:57:56,234 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-18 11:57:56,234 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 161 [2018-11-18 11:57:56,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 406 states and 566 transitions. [2018-11-18 11:57:56,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 11:57:56,235 INFO L705 BuchiCegarLoop]: Abstraction has 406 states and 566 transitions. [2018-11-18 11:57:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states and 566 transitions. [2018-11-18 11:57:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 390. [2018-11-18 11:57:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2018-11-18 11:57:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 542 transitions. [2018-11-18 11:57:56,245 INFO L728 BuchiCegarLoop]: Abstraction has 390 states and 542 transitions. [2018-11-18 11:57:56,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-18 11:57:56,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-11-18 11:57:56,245 INFO L87 Difference]: Start difference. First operand 390 states and 542 transitions. Second operand 20 states. [2018-11-18 11:57:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:57:56,524 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2018-11-18 11:57:56,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 11:57:56,525 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 209 transitions. [2018-11-18 11:57:56,527 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 11:57:56,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2018-11-18 11:57:56,527 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-18 11:57:56,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-18 11:57:56,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-18 11:57:56,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-18 11:57:56,527 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 11:57:56,527 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 11:57:56,527 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 11:57:56,528 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-18 11:57:56,528 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-18 11:57:56,528 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 11:57:56,528 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-18 11:57:56,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 11:57:56 BoogieIcfgContainer [2018-11-18 11:57:56,533 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-18 11:57:56,534 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:57:56,534 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:57:56,534 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:57:56,534 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:57:51" (3/4) ... [2018-11-18 11:57:56,537 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 11:57:56,537 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:57:56,538 INFO L168 Benchmark]: Toolchain (without parser) took 5037.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 182.5 MB). Free memory was 959.2 MB in the beginning and 973.7 MB in the end (delta: -14.5 MB). Peak memory consumption was 168.0 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:56,539 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:57:56,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.72 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:56,540 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.03 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:56,541 INFO L168 Benchmark]: Boogie Preprocessor took 9.07 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:57:56,541 INFO L168 Benchmark]: RCFGBuilder took 158.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:56,541 INFO L168 Benchmark]: BuchiAutomizer took 4700.66 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 47.7 MB). Free memory was 1.1 GB in the beginning and 978.4 MB in the end (delta: 145.9 MB). Peak memory consumption was 193.6 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:56,542 INFO L168 Benchmark]: Witness Printer took 3.91 ms. Allocated memory is still 1.2 GB. Free memory was 978.4 MB in the beginning and 973.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. [2018-11-18 11:57:56,545 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 145.72 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.03 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.07 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 158.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.4 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4700.66 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 47.7 MB). Free memory was 1.1 GB in the beginning and 978.4 MB in the end (delta: 145.9 MB). Peak memory consumption was 193.6 MB. Max. memory is 11.5 GB. * Witness Printer took 3.91 ms. Allocated memory is still 1.2 GB. Free memory was 978.4 MB in the beginning and 973.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (4 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 4 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.6s and 6 iterations. TraceHistogramMax:6. Analysis of lassos took 2.5s. Construction of modules took 0.4s. Büchi inclusion checks took 1.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 254 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 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, 0.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp90 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq189 hnf92 smp84 dnf100 smp100 tf110 neg97 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...