./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 f612eebc128d68e9b4bc81ed92184f640c3b9bd4 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-09 23:08:19,887 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-09 23:08:19,888 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-09 23:08:19,895 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-09 23:08:19,895 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-09 23:08:19,895 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-09 23:08:19,896 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-09 23:08:19,897 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-09 23:08:19,898 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-09 23:08:19,899 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-09 23:08:19,899 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-09 23:08:19,899 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-09 23:08:19,900 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-09 23:08:19,900 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-09 23:08:19,901 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-09 23:08:19,902 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-09 23:08:19,902 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-09 23:08:19,904 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-09 23:08:19,905 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-09 23:08:19,906 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-09 23:08:19,907 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-09 23:08:19,907 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-09 23:08:19,909 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-09 23:08:19,909 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-09 23:08:19,909 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-09 23:08:19,910 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-09 23:08:19,911 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-09 23:08:19,911 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-09 23:08:19,912 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-09 23:08:19,913 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-09 23:08:19,913 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-09 23:08:19,913 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-09 23:08:19,913 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-09 23:08:19,913 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-09 23:08:19,914 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-09 23:08:19,914 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-09 23:08:19,915 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-09 23:08:19,926 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-09 23:08:19,926 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-09 23:08:19,927 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-09 23:08:19,927 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-09 23:08:19,927 INFO L133 SettingsManager]: * Use SBE=true [2018-11-09 23:08:19,927 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-09 23:08:19,927 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-09 23:08:19,928 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-09 23:08:19,928 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-09 23:08:19,928 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-09 23:08:19,928 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-09 23:08:19,928 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-09 23:08:19,928 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-09 23:08:19,928 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-09 23:08:19,928 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-09 23:08:19,929 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-09 23:08:19,929 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-09 23:08:19,929 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-09 23:08:19,929 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-09 23:08:19,929 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-09 23:08:19,929 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-09 23:08:19,929 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-09 23:08:19,930 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-09 23:08:19,930 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-09 23:08:19,930 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-09 23:08:19,930 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-09 23:08:19,930 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-09 23:08:19,930 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-09 23:08:19,930 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-09 23:08:19,931 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-09 23:08:19,931 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-09 23:08:19,931 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_7054bdcc-6269-4248-9f98-8197a3e3d215/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 -> f612eebc128d68e9b4bc81ed92184f640c3b9bd4 [2018-11-09 23:08:19,955 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-09 23:08:19,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-09 23:08:19,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-09 23:08:19,970 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-09 23:08:19,970 INFO L276 PluginConnector]: CDTParser initialized [2018-11-09 23:08:19,970 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c [2018-11-09 23:08:20,011 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/data/84e358702/1852f254c5ea47ad911ab20ac399242f/FLAGb93a4bc18 [2018-11-09 23:08:20,401 INFO L298 CDTParser]: Found 1 translation units. [2018-11-09 23:08:20,402 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/sv-benchmarks/c/recursive-simple/fibo_7_true-unreach-call_true-termination.c [2018-11-09 23:08:20,406 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/data/84e358702/1852f254c5ea47ad911ab20ac399242f/FLAGb93a4bc18 [2018-11-09 23:08:20,416 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/data/84e358702/1852f254c5ea47ad911ab20ac399242f [2018-11-09 23:08:20,418 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-09 23:08:20,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-09 23:08:20,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-09 23:08:20,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-09 23:08:20,423 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-09 23:08:20,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62ca410a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20, skipping insertion in model container [2018-11-09 23:08:20,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-09 23:08:20,448 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-09 23:08:20,546 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-09 23:08:20,548 INFO L189 MainTranslator]: Completed pre-run [2018-11-09 23:08:20,557 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-09 23:08:20,565 INFO L193 MainTranslator]: Completed translation [2018-11-09 23:08:20,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20 WrapperNode [2018-11-09 23:08:20,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-09 23:08:20,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-09 23:08:20,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-09 23:08:20,566 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-09 23:08:20,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-09 23:08:20,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-09 23:08:20,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-09 23:08:20,583 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-09 23:08:20,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... [2018-11-09 23:08:20,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-09 23:08:20,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-09 23:08:20,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-09 23:08:20,592 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-09 23:08:20,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-09 23:08:20,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-09 23:08:20,659 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-09 23:08:20,660 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-09 23:08:20,739 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-09 23:08:20,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 11:08:20 BoogieIcfgContainer [2018-11-09 23:08:20,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-09 23:08:20,740 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-09 23:08:20,740 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-09 23:08:20,742 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-09 23:08:20,743 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-09 23:08:20,743 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 09.11 11:08:20" (1/3) ... [2018-11-09 23:08:20,744 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6d539113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 11:08:20, skipping insertion in model container [2018-11-09 23:08:20,744 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-09 23:08:20,744 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:08:20" (2/3) ... [2018-11-09 23:08:20,744 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6d539113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 11:08:20, skipping insertion in model container [2018-11-09 23:08:20,744 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-09 23:08:20,744 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 11:08:20" (3/3) ... [2018-11-09 23:08:20,745 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_7_true-unreach-call_true-termination.c [2018-11-09 23:08:20,796 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-09 23:08:20,797 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-09 23:08:20,797 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-09 23:08:20,797 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-09 23:08:20,797 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-09 23:08:20,797 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-09 23:08:20,797 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-09 23:08:20,797 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-09 23:08:20,797 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-09 23:08:20,806 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-11-09 23:08:20,821 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-09 23:08:20,821 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-09 23:08:20,821 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-09 23:08:20,827 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-09 23:08:20,827 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-09 23:08:20,827 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-09 23:08:20,828 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-11-09 23:08:20,829 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-09 23:08:20,829 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-09 23:08:20,830 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-09 23:08:20,830 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-09 23:08:20,830 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-09 23:08:20,837 INFO L793 eck$LassoCheckResult]: Stem: 9#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 20#L25true call main_#t~ret2 := fibo(main_~x~0);< 12#fiboENTRYtrue [2018-11-09 23:08:20,837 INFO L795 eck$LassoCheckResult]: Loop: 12#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 11#L8true assume !(~n == 1); 19#L11true call #t~ret0 := fibo(~n - 1);< 12#fiboENTRYtrue [2018-11-09 23:08:20,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:20,842 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2018-11-09 23:08:20,844 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:20,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:20,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:20,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:20,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:20,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2018-11-09 23:08:20,909 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:20,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:20,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:20,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:20,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:20,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2018-11-09 23:08:20,918 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:20,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:20,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:20,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:20,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:21,004 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:21,005 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:21,005 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:21,005 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:21,005 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-09 23:08:21,005 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:21,006 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:21,006 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:21,006 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-09 23:08:21,006 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:21,006 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:21,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,028 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,092 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:21,092 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:21,109 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:21,109 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:21,126 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-09 23:08:21,126 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:21,143 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:21,143 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:21,145 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-09 23:08:21,145 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:21,171 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:21,171 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:21,173 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-09 23:08:21,173 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:21,190 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:21,190 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:21,192 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-09 23:08:21,193 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:21,209 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:21,209 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:21,227 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-09 23:08:21,227 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:21,245 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-09 23:08:21,246 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:21,246 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:21,247 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:21,247 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:21,247 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-09 23:08:21,247 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:21,247 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:21,247 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:21,247 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration1_Loop [2018-11-09 23:08:21,247 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:21,247 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:21,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,253 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,298 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:21,302 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-09 23:08:21,304 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 [2018-11-09 23:08:21,305 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:21,305 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:21,306 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:21,306 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:21,306 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:21,307 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:21,308 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:21,311 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-09 23:08:21,311 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 [2018-11-09 23:08:21,312 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:21,312 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:21,312 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:21,312 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:21,312 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:21,313 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:21,313 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:21,314 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-09 23:08:21,314 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 [2018-11-09 23:08:21,314 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:21,315 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:21,315 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:21,315 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:21,315 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:21,315 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:21,315 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:21,316 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-09 23:08:21,317 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 [2018-11-09 23:08:21,317 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:21,317 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:21,317 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:21,318 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:21,318 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:21,318 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:21,318 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:21,319 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-09 23:08:21,319 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 [2018-11-09 23:08:21,320 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:21,320 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:21,320 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:21,320 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:21,320 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:21,321 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:21,321 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:21,325 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-09 23:08:21,328 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-09 23:08:21,329 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-09 23:08:21,330 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-09 23:08:21,330 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-09 23:08:21,330 INFO L517 LassoAnalysis]: Proved termination. [2018-11-09 23:08:21,330 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-09 23:08:21,331 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-09 23:08:21,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:21,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:21,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:21,435 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 [2018-11-09 23:08:21,436 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states. Second operand 4 states. [2018-11-09 23:08:21,499 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. [2018-11-09 23:08:21,499 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 [2018-11-09 23:08:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-09 23:08:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2018-11-09 23:08:21,502 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2018-11-09 23:08:21,503 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:21,503 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2018-11-09 23:08:21,504 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:21,504 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2018-11-09 23:08:21,504 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:21,505 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2018-11-09 23:08:21,507 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-09 23:08:21,511 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2018-11-09 23:08:21,512 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-11-09 23:08:21,512 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2018-11-09 23:08:21,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2018-11-09 23:08:21,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:21,513 INFO L705 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2018-11-09 23:08:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2018-11-09 23:08:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-11-09 23:08:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-09 23:08:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2018-11-09 23:08:21,532 INFO L728 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-11-09 23:08:21,532 INFO L608 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-11-09 23:08:21,533 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-09 23:08:21,533 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2018-11-09 23:08:21,533 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-09 23:08:21,533 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-09 23:08:21,533 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-09 23:08:21,534 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:08:21,534 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:08:21,534 INFO L793 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 125#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 126#L25 call main_#t~ret2 := fibo(main_~x~0);< 131#fiboENTRY ~n := #in~n; 132#L6 assume !(~n < 1); 130#L8 assume !(~n == 1); 123#L11 call #t~ret0 := fibo(~n - 1);< 133#fiboENTRY ~n := #in~n; 134#L6 assume ~n < 1;#res := 0; 129#fiboFINAL assume true; 122#fiboEXIT >#33#return; 124#L11-1 [2018-11-09 23:08:21,534 INFO L795 eck$LassoCheckResult]: Loop: 124#L11-1 call #t~ret1 := fibo(~n - 2);< 138#fiboENTRY ~n := #in~n; 141#L6 assume !(~n < 1); 140#L8 assume !(~n == 1); 136#L11 call #t~ret0 := fibo(~n - 1);< 138#fiboENTRY ~n := #in~n; 141#L6 assume ~n < 1;#res := 0; 137#fiboFINAL assume true; 139#fiboEXIT >#33#return; 124#L11-1 [2018-11-09 23:08:21,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2018-11-09 23:08:21,535 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:21,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:21,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:21,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:21,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-09 23:08:21,597 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-09 23:08:21,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-09 23:08:21,599 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-11-09 23:08:21,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:21,599 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2018-11-09 23:08:21,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:21,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:21,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:21,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:21,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-09 23:08:21,634 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-09 23:08:21,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-09 23:08:21,634 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-11-09 23:08:21,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-09 23:08:21,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-09 23:08:21,638 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-11-09 23:08:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:08:21,705 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-11-09 23:08:21,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-09 23:08:21,706 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2018-11-09 23:08:21,707 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-09 23:08:21,708 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2018-11-09 23:08:21,708 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2018-11-09 23:08:21,708 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2018-11-09 23:08:21,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2018-11-09 23:08:21,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:21,709 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-11-09 23:08:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2018-11-09 23:08:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-09 23:08:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-09 23:08:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2018-11-09 23:08:21,713 INFO L728 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-11-09 23:08:21,713 INFO L608 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-11-09 23:08:21,714 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-09 23:08:21,714 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2018-11-09 23:08:21,714 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-09 23:08:21,714 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-09 23:08:21,714 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-09 23:08:21,715 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:08:21,715 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-09 23:08:21,715 INFO L793 eck$LassoCheckResult]: Stem: 192#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 190#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 191#L25 call main_#t~ret2 := fibo(main_~x~0);< 196#fiboENTRY ~n := #in~n; 197#L6 assume !(~n < 1); 195#L8 assume !(~n == 1); 188#L11 call #t~ret0 := fibo(~n - 1);< 198#fiboENTRY ~n := #in~n; 199#L6 assume !(~n < 1); 193#L8 assume ~n == 1;#res := 1; 194#fiboFINAL assume true; 187#fiboEXIT >#33#return; 189#L11-1 [2018-11-09 23:08:21,715 INFO L795 eck$LassoCheckResult]: Loop: 189#L11-1 call #t~ret1 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume !(~n == 1); 201#L11 call #t~ret0 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume ~n == 1;#res := 1; 207#fiboFINAL assume true; 205#fiboEXIT >#33#return; 189#L11-1 [2018-11-09 23:08:21,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:21,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2018-11-09 23:08:21,716 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:21,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:21,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:21,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:21,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:21,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:08:21,751 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:21,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:21,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:21,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:08:21,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-09 23:08:21,792 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-11-09 23:08:21,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:21,793 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2018-11-09 23:08:21,793 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:21,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:21,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:21,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:21,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:21,863 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:21,864 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:21,864 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:21,864 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:21,864 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-09 23:08:21,864 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:21,864 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:21,864 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:21,864 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-09 23:08:21,865 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:21,865 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:21,866 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:21,907 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:21,907 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:21,909 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:21,910 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:21,929 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-09 23:08:21,929 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:22,827 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-09 23:08:22,828 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:22,829 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:22,829 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:22,829 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:22,829 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-09 23:08:22,829 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:22,829 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:22,829 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:22,829 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration3_Loop [2018-11-09 23:08:22,829 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:22,829 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:22,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:22,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:22,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:22,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:22,876 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:22,876 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-09 23:08:22,876 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 [2018-11-09 23:08:22,877 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:22,877 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:22,877 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:22,878 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:22,878 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:22,878 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:22,878 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:22,881 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-09 23:08:22,881 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 [2018-11-09 23:08:22,881 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:22,882 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:22,882 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:22,882 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:22,882 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:22,883 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:22,883 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:22,888 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-09 23:08:22,891 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-09 23:08:22,891 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-09 23:08:22,891 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-09 23:08:22,891 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-09 23:08:22,892 INFO L517 LassoAnalysis]: Proved termination. [2018-11-09 23:08:22,892 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-09 23:08:22,892 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-09 23:08:22,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:22,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:22,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:22,993 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 [2018-11-09 23:08:22,993 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-11-09 23:08:23,093 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. [2018-11-09 23:08:23,093 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 [2018-11-09 23:08:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-09 23:08:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-11-09 23:08:23,094 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 10 letters. [2018-11-09 23:08:23,094 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:23,094 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 22 letters. Loop has 10 letters. [2018-11-09 23:08:23,094 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:23,094 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 20 letters. [2018-11-09 23:08:23,095 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:23,095 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2018-11-09 23:08:23,100 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-09 23:08:23,103 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2018-11-09 23:08:23,103 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2018-11-09 23:08:23,104 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-11-09 23:08:23,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2018-11-09 23:08:23,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:23,104 INFO L705 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2018-11-09 23:08:23,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2018-11-09 23:08:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2018-11-09 23:08:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-09 23:08:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2018-11-09 23:08:23,113 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2018-11-09 23:08:23,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-09 23:08:23,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-09 23:08:23,114 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 7 states. [2018-11-09 23:08:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:08:23,171 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2018-11-09 23:08:23,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-09 23:08:23,172 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2018-11-09 23:08:23,175 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-09 23:08:23,177 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2018-11-09 23:08:23,177 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2018-11-09 23:08:23,178 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-11-09 23:08:23,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2018-11-09 23:08:23,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:23,178 INFO L705 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2018-11-09 23:08:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2018-11-09 23:08:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2018-11-09 23:08:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-09 23:08:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2018-11-09 23:08:23,188 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-11-09 23:08:23,188 INFO L608 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-11-09 23:08:23,188 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-09 23:08:23,188 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2018-11-09 23:08:23,189 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-09 23:08:23,190 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-09 23:08:23,190 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-09 23:08:23,191 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:08:23,191 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-09 23:08:23,191 INFO L793 eck$LassoCheckResult]: Stem: 720#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 710#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 711#L25 call main_#t~ret2 := fibo(main_~x~0);< 752#fiboENTRY ~n := #in~n; 755#L6 assume !(~n < 1); 726#L8 assume !(~n == 1); 727#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(~n == 1); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(~n == 1); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 740#L6 assume !(~n < 1); 775#L8 assume ~n == 1;#res := 1; 773#fiboFINAL assume true; 772#fiboEXIT >#33#return; 729#L11-1 call #t~ret1 := fibo(~n - 2);< 771#fiboENTRY ~n := #in~n; 801#L6 assume ~n < 1;#res := 0; 800#fiboFINAL assume true; 799#fiboEXIT >#35#return; 798#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 797#fiboFINAL assume true; 790#fiboEXIT >#33#return; 723#L11-1 [2018-11-09 23:08:23,191 INFO L795 eck$LassoCheckResult]: Loop: 723#L11-1 call #t~ret1 := fibo(~n - 2);< 750#fiboENTRY ~n := #in~n; 776#L6 assume !(~n < 1); 721#L8 assume !(~n == 1); 724#L11 call #t~ret0 := fibo(~n - 1);< 750#fiboENTRY ~n := #in~n; 776#L6 assume !(~n < 1); 721#L8 assume ~n == 1;#res := 1; 725#fiboFINAL assume true; 791#fiboEXIT >#33#return; 723#L11-1 [2018-11-09 23:08:23,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:23,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2018-11-09 23:08:23,193 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:23,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:23,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:23,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:23,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-09 23:08:23,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:08:23,247 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:23,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:23,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-09 23:08:23,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:08:23,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-09 23:08:23,299 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-11-09 23:08:23,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:23,299 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 2 times [2018-11-09 23:08:23,299 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:23,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:23,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:23,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:23,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:23,357 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:23,358 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:23,358 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:23,358 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:23,358 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-09 23:08:23,358 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:23,358 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:23,358 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:23,358 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration4_Loop [2018-11-09 23:08:23,358 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:23,358 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:23,359 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:23,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:23,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:23,367 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:23,389 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:23,389 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:23,391 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:23,391 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:23,410 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-09 23:08:23,410 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:24,311 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-09 23:08:24,312 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:24,312 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:24,312 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:24,313 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:24,313 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-09 23:08:24,313 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:24,313 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:24,313 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:24,313 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration4_Loop [2018-11-09 23:08:24,313 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:24,313 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:24,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:24,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:24,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:24,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:24,347 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:24,347 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-09 23:08:24,347 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 [2018-11-09 23:08:24,348 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:24,348 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:24,348 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:24,348 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:24,348 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:24,348 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:24,349 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:24,349 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-09 23:08:24,350 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 [2018-11-09 23:08:24,350 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:24,350 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:24,350 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:24,350 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:24,350 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:24,351 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:24,351 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:24,351 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-09 23:08:24,352 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 [2018-11-09 23:08:24,352 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:24,352 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:24,352 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:24,352 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:24,352 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:24,353 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:24,353 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:24,354 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-09 23:08:24,355 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 [2018-11-09 23:08:24,355 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:24,355 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:24,355 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:24,355 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:24,355 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:24,356 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:24,356 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:24,359 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-09 23:08:24,360 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-09 23:08:24,360 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-09 23:08:24,360 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-09 23:08:24,360 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-09 23:08:24,361 INFO L517 LassoAnalysis]: Proved termination. [2018-11-09 23:08:24,361 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-09 23:08:24,361 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-09 23:08:24,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:24,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:24,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:24,440 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 [2018-11-09 23:08:24,440 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-09 23:08:24,535 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. [2018-11-09 23:08:24,536 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 [2018-11-09 23:08:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-09 23:08:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-11-09 23:08:24,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 28 letters. Loop has 10 letters. [2018-11-09 23:08:24,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:24,537 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-09 23:08:24,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:24,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:24,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:24,640 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 [2018-11-09 23:08:24,640 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-09 23:08:24,720 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. [2018-11-09 23:08:24,721 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 [2018-11-09 23:08:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-09 23:08:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2018-11-09 23:08:24,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2018-11-09 23:08:24,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:24,722 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-09 23:08:24,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:24,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:24,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:24,801 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 [2018-11-09 23:08:24,801 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-11-09 23:08:24,912 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. [2018-11-09 23:08:24,914 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 [2018-11-09 23:08:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-09 23:08:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 40 transitions. [2018-11-09 23:08:24,914 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 10 letters. [2018-11-09 23:08:24,915 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:24,915 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 38 letters. Loop has 10 letters. [2018-11-09 23:08:24,916 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:24,916 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 20 letters. [2018-11-09 23:08:24,917 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:24,917 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 826 states and 1091 transitions. [2018-11-09 23:08:24,929 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-09 23:08:24,937 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 826 states to 413 states and 595 transitions. [2018-11-09 23:08:24,937 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-11-09 23:08:24,937 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 180 [2018-11-09 23:08:24,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 413 states and 595 transitions. [2018-11-09 23:08:24,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:24,940 INFO L705 BuchiCegarLoop]: Abstraction has 413 states and 595 transitions. [2018-11-09 23:08:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states and 595 transitions. [2018-11-09 23:08:24,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 336. [2018-11-09 23:08:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2018-11-09 23:08:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 463 transitions. [2018-11-09 23:08:24,964 INFO L728 BuchiCegarLoop]: Abstraction has 336 states and 463 transitions. [2018-11-09 23:08:24,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-09 23:08:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-11-09 23:08:24,965 INFO L87 Difference]: Start difference. First operand 336 states and 463 transitions. Second operand 10 states. [2018-11-09 23:08:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:08:25,116 INFO L93 Difference]: Finished difference Result 498 states and 786 transitions. [2018-11-09 23:08:25,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-09 23:08:25,117 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 498 states and 786 transitions. [2018-11-09 23:08:25,122 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-11-09 23:08:25,128 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 498 states to 496 states and 783 transitions. [2018-11-09 23:08:25,128 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 243 [2018-11-09 23:08:25,129 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 243 [2018-11-09 23:08:25,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 496 states and 783 transitions. [2018-11-09 23:08:25,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:25,129 INFO L705 BuchiCegarLoop]: Abstraction has 496 states and 783 transitions. [2018-11-09 23:08:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states and 783 transitions. [2018-11-09 23:08:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 370. [2018-11-09 23:08:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2018-11-09 23:08:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 523 transitions. [2018-11-09 23:08:25,146 INFO L728 BuchiCegarLoop]: Abstraction has 370 states and 523 transitions. [2018-11-09 23:08:25,146 INFO L608 BuchiCegarLoop]: Abstraction has 370 states and 523 transitions. [2018-11-09 23:08:25,146 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-09 23:08:25,146 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 370 states and 523 transitions. [2018-11-09 23:08:25,148 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-09 23:08:25,148 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-09 23:08:25,148 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-09 23:08:25,149 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:08:25,149 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-09 23:08:25,149 INFO L793 eck$LassoCheckResult]: Stem: 3582#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3580#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 3581#L25 call main_#t~ret2 := fibo(main_~x~0);< 3622#fiboENTRY ~n := #in~n; 3634#L6 assume !(~n < 1); 3633#L8 assume !(~n == 1); 3629#L11 call #t~ret0 := fibo(~n - 1);< 3631#fiboENTRY ~n := #in~n; 3632#L6 assume !(~n < 1); 3628#L8 assume !(~n == 1); 3584#L11 call #t~ret0 := fibo(~n - 1);< 3625#fiboENTRY ~n := #in~n; 3627#L6 assume !(~n < 1); 3630#L8 assume !(~n == 1); 3585#L11 call #t~ret0 := fibo(~n - 1);< 3625#fiboENTRY ~n := #in~n; 3626#L6 assume !(~n < 1); 3583#L8 assume ~n == 1;#res := 1; 3586#fiboFINAL assume true; 3676#fiboEXIT >#33#return; 3652#L11-1 call #t~ret1 := fibo(~n - 2);< 3661#fiboENTRY ~n := #in~n; 3720#L6 assume !(~n < 1); 3712#L8 assume !(~n == 1); 3714#L11 call #t~ret0 := fibo(~n - 1);< 3913#fiboENTRY ~n := #in~n; 3918#L6 assume !(~n < 1); 3915#L8 assume !(~n == 1); 3916#L11 call #t~ret0 := fibo(~n - 1);< 3925#fiboENTRY [2018-11-09 23:08:25,149 INFO L795 eck$LassoCheckResult]: Loop: 3925#fiboENTRY ~n := #in~n; 3932#L6 assume !(~n < 1); 3931#L8 assume !(~n == 1); 3922#L11 call #t~ret0 := fibo(~n - 1);< 3925#fiboENTRY [2018-11-09 23:08:25,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:25,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1816361660, now seen corresponding path program 1 times [2018-11-09 23:08:25,149 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:25,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:25,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:25,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:08:25,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-09 23:08:25,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:08:25,194 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:25,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:25,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-09 23:08:25,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:08:25,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-09 23:08:25,313 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-11-09 23:08:25,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:25,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2018-11-09 23:08:25,314 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:25,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:25,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:25,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-09 23:08:25,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:25,332 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:25,332 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:25,332 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:25,332 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:25,332 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-09 23:08:25,332 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:25,332 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:25,332 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:25,332 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration5_Loop [2018-11-09 23:08:25,333 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:25,333 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:25,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,363 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:25,363 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:25,367 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:25,367 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:25,369 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-09 23:08:25,370 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:25,386 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:25,386 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/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 [2018-11-09 23:08:25,404 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-09 23:08:25,404 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:25,422 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-09 23:08:25,423 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:25,423 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:25,423 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:25,423 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:25,423 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-09 23:08:25,423 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:25,423 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:25,423 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:25,424 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration5_Loop [2018-11-09 23:08:25,424 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:25,424 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:25,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:25,467 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:25,467 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-09 23:08:25,467 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 [2018-11-09 23:08:25,467 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:25,468 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:25,468 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:25,468 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:25,468 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:25,468 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:25,468 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:25,470 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-09 23:08:25,471 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-09 23:08:25,472 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-09 23:08:25,472 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-09 23:08:25,472 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-09 23:08:25,472 INFO L517 LassoAnalysis]: Proved termination. [2018-11-09 23:08:25,472 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-11-09 23:08:25,472 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-09 23:08:25,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:25,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:25,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:25,546 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 [2018-11-09 23:08:25,546 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-09 23:08:25,605 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 380 states and 533 transitions. Complement of second has 13 states. [2018-11-09 23:08:25,606 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 [2018-11-09 23:08:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-09 23:08:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-11-09 23:08:25,607 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-11-09 23:08:25,607 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:25,607 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-09 23:08:25,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:25,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:25,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:25,698 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 [2018-11-09 23:08:25,699 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-09 23:08:25,760 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 380 states and 533 transitions. Complement of second has 13 states. [2018-11-09 23:08:25,761 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 [2018-11-09 23:08:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-09 23:08:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-11-09 23:08:25,762 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-11-09 23:08:25,762 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:25,762 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-09 23:08:25,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:25,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:25,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:25,838 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 [2018-11-09 23:08:25,838 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160 Second operand 5 states. [2018-11-09 23:08:25,901 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 370 states and 523 transitions. cyclomatic complexity: 160. Second operand 5 states. Result 495 states and 657 transitions. Complement of second has 14 states. [2018-11-09 23:08:25,901 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 [2018-11-09 23:08:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-09 23:08:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2018-11-09 23:08:25,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2018-11-09 23:08:25,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:25,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2018-11-09 23:08:25,903 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:25,903 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2018-11-09 23:08:25,903 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:25,903 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 657 transitions. [2018-11-09 23:08:25,906 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-11-09 23:08:25,910 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 408 states and 568 transitions. [2018-11-09 23:08:25,910 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 157 [2018-11-09 23:08:25,912 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 163 [2018-11-09 23:08:25,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 408 states and 568 transitions. [2018-11-09 23:08:25,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:25,912 INFO L705 BuchiCegarLoop]: Abstraction has 408 states and 568 transitions. [2018-11-09 23:08:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states and 568 transitions. [2018-11-09 23:08:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 394. [2018-11-09 23:08:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-11-09 23:08:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 547 transitions. [2018-11-09 23:08:25,920 INFO L728 BuchiCegarLoop]: Abstraction has 394 states and 547 transitions. [2018-11-09 23:08:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-09 23:08:25,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-11-09 23:08:25,921 INFO L87 Difference]: Start difference. First operand 394 states and 547 transitions. Second operand 14 states. [2018-11-09 23:08:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:08:26,049 INFO L93 Difference]: Finished difference Result 275 states and 349 transitions. [2018-11-09 23:08:26,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-09 23:08:26,050 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 275 states and 349 transitions. [2018-11-09 23:08:26,052 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-09 23:08:26,053 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 275 states to 245 states and 314 transitions. [2018-11-09 23:08:26,053 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 120 [2018-11-09 23:08:26,054 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 123 [2018-11-09 23:08:26,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 245 states and 314 transitions. [2018-11-09 23:08:26,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:26,054 INFO L705 BuchiCegarLoop]: Abstraction has 245 states and 314 transitions. [2018-11-09 23:08:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states and 314 transitions. [2018-11-09 23:08:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 204. [2018-11-09 23:08:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-11-09 23:08:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2018-11-09 23:08:26,059 INFO L728 BuchiCegarLoop]: Abstraction has 204 states and 261 transitions. [2018-11-09 23:08:26,059 INFO L608 BuchiCegarLoop]: Abstraction has 204 states and 261 transitions. [2018-11-09 23:08:26,059 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-09 23:08:26,059 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 204 states and 261 transitions. [2018-11-09 23:08:26,060 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-09 23:08:26,060 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-09 23:08:26,060 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-09 23:08:26,061 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-09 23:08:26,061 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-09 23:08:26,061 INFO L793 eck$LassoCheckResult]: Stem: 6358#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6356#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 := 7; 6357#L25 call main_#t~ret2 := fibo(main_~x~0);< 6395#fiboENTRY ~n := #in~n; 6465#L6 assume !(~n < 1); 6464#L8 assume !(~n == 1); 6460#L11 call #t~ret0 := fibo(~n - 1);< 6463#fiboENTRY ~n := #in~n; 6462#L6 assume !(~n < 1); 6461#L8 assume !(~n == 1); 6455#L11 call #t~ret0 := fibo(~n - 1);< 6459#fiboENTRY ~n := #in~n; 6457#L6 assume !(~n < 1); 6458#L8 assume !(~n == 1); 6383#L11 call #t~ret0 := fibo(~n - 1);< 6453#fiboENTRY ~n := #in~n; 6454#L6 assume !(~n < 1); 6456#L8 assume !(~n == 1); 6384#L11 call #t~ret0 := fibo(~n - 1);< 6453#fiboENTRY ~n := #in~n; 6454#L6 assume !(~n < 1); 6456#L8 assume !(~n == 1); 6384#L11 call #t~ret0 := fibo(~n - 1);< 6453#fiboENTRY ~n := #in~n; 6449#L6 assume !(~n < 1); 6450#L8 assume ~n == 1;#res := 1; 6550#fiboFINAL assume true; 6549#fiboEXIT >#33#return; 6351#L11-1 call #t~ret1 := fibo(~n - 2);< 6385#fiboENTRY ~n := #in~n; 6553#L6 assume ~n < 1;#res := 0; 6552#fiboFINAL assume true; 6350#fiboEXIT >#35#return; 6352#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 6538#fiboFINAL assume true; 6523#fiboEXIT >#33#return; 6374#L11-1 call #t~ret1 := fibo(~n - 2);< 6522#fiboENTRY ~n := #in~n; 6541#L6 assume !(~n < 1); 6396#L8 assume !(~n == 1); 6360#L11 call #t~ret0 := fibo(~n - 1);< 6389#fiboENTRY ~n := #in~n; 6445#L6 assume !(~n < 1); 6435#L8 assume !(~n == 1); 6417#L11 call #t~ret0 := fibo(~n - 1);< 6418#fiboENTRY ~n := #in~n; 6432#L6 assume !(~n < 1); 6430#L8 assume !(~n == 1); 6416#L11 [2018-11-09 23:08:26,061 INFO L795 eck$LassoCheckResult]: Loop: 6416#L11 call #t~ret0 := fibo(~n - 1);< 6418#fiboENTRY ~n := #in~n; 6432#L6 assume !(~n < 1); 6430#L8 assume !(~n == 1); 6416#L11 [2018-11-09 23:08:26,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:26,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1127026968, now seen corresponding path program 2 times [2018-11-09 23:08:26,061 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:26,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:26,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:26,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:08:26,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 90 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-09 23:08:26,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:08:26,124 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:08:26,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-09 23:08:26,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-09 23:08:26,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-09 23:08:26,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-09 23:08:26,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:08:26,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2018-11-09 23:08:26,269 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-11-09 23:08:26,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 3 times [2018-11-09 23:08:26,269 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:26,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:26,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:26,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:08:26,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:26,300 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:26,300 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:26,300 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:26,300 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:26,300 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-09 23:08:26,300 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:26,300 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:26,300 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:26,300 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration6_Loop [2018-11-09 23:08:26,300 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:26,300 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:26,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:26,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:26,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:26,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:26,333 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:26,334 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:26,348 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:26,348 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:26,364 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-09 23:08:26,364 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:26,388 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:26,388 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:26,418 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-09 23:08:26,419 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:28,660 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-09 23:08:28,662 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:28,662 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:28,662 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:28,662 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:28,662 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-09 23:08:28,662 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:28,662 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:28,662 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:28,662 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration6_Loop [2018-11-09 23:08:28,662 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:28,662 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:28,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:28,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:28,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:28,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:28,698 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:28,698 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-09 23:08:28,698 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 [2018-11-09 23:08:28,698 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:28,699 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:28,699 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:28,699 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:28,699 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:28,699 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:28,699 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:28,701 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-09 23:08:28,703 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-09 23:08:28,703 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-09 23:08:28,703 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-09 23:08:28,703 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-09 23:08:28,703 INFO L517 LassoAnalysis]: Proved termination. [2018-11-09 23:08:28,707 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-09 23:08:28,708 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-09 23:08:28,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:28,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:28,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:28,803 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-09 23:08:28,804 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-09 23:08:28,836 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 216 states and 274 transitions. Complement of second has 18 states. [2018-11-09 23:08:28,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-09 23:08:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-09 23:08:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2018-11-09 23:08:28,837 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2018-11-09 23:08:28,837 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:28,837 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-09 23:08:28,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:28,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:28,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:28,971 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-09 23:08:28,971 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-09 23:08:29,037 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 222 states and 280 transitions. Complement of second has 17 states. [2018-11-09 23:08:29,038 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 [2018-11-09 23:08:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-09 23:08:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2018-11-09 23:08:29,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2018-11-09 23:08:29,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:29,038 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-09 23:08:29,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:29,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:29,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:29,147 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-09 23:08:29,147 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61 Second operand 6 states. [2018-11-09 23:08:29,182 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 204 states and 261 transitions. cyclomatic complexity: 61. Second operand 6 states. Result 272 states and 344 transitions. Complement of second has 27 states. [2018-11-09 23:08:29,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-09 23:08:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-09 23:08:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2018-11-09 23:08:29,184 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2018-11-09 23:08:29,184 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:29,184 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2018-11-09 23:08:29,185 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:29,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2018-11-09 23:08:29,185 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:29,185 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 272 states and 344 transitions. [2018-11-09 23:08:29,187 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-09 23:08:29,190 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 272 states to 208 states and 266 transitions. [2018-11-09 23:08:29,190 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 80 [2018-11-09 23:08:29,191 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 91 [2018-11-09 23:08:29,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 208 states and 266 transitions. [2018-11-09 23:08:29,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:29,191 INFO L705 BuchiCegarLoop]: Abstraction has 208 states and 266 transitions. [2018-11-09 23:08:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states and 266 transitions. [2018-11-09 23:08:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-11-09 23:08:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-11-09 23:08:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2018-11-09 23:08:29,195 INFO L728 BuchiCegarLoop]: Abstraction has 204 states and 261 transitions. [2018-11-09 23:08:29,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-09 23:08:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2018-11-09 23:08:29,195 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 20 states. [2018-11-09 23:08:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:08:29,414 INFO L93 Difference]: Finished difference Result 345 states and 474 transitions. [2018-11-09 23:08:29,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-09 23:08:29,415 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 474 transitions. [2018-11-09 23:08:29,418 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-09 23:08:29,421 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 316 states and 438 transitions. [2018-11-09 23:08:29,421 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 145 [2018-11-09 23:08:29,422 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 155 [2018-11-09 23:08:29,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 316 states and 438 transitions. [2018-11-09 23:08:29,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:29,422 INFO L705 BuchiCegarLoop]: Abstraction has 316 states and 438 transitions. [2018-11-09 23:08:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states and 438 transitions. [2018-11-09 23:08:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 271. [2018-11-09 23:08:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-11-09 23:08:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 365 transitions. [2018-11-09 23:08:29,432 INFO L728 BuchiCegarLoop]: Abstraction has 271 states and 365 transitions. [2018-11-09 23:08:29,432 INFO L608 BuchiCegarLoop]: Abstraction has 271 states and 365 transitions. [2018-11-09 23:08:29,433 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-09 23:08:29,433 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 271 states and 365 transitions. [2018-11-09 23:08:29,434 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-09 23:08:29,434 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-09 23:08:29,434 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-09 23:08:29,437 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2018-11-09 23:08:29,438 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-09 23:08:29,438 INFO L793 eck$LassoCheckResult]: Stem: 8580#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 8569#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 := 7; 8570#L25 call main_#t~ret2 := fibo(main_~x~0);< 8616#fiboENTRY ~n := #in~n; 8678#L6 assume !(~n < 1); 8676#L8 assume !(~n == 1); 8673#L11 call #t~ret0 := fibo(~n - 1);< 8674#fiboENTRY ~n := #in~n; 8689#L6 assume !(~n < 1); 8688#L8 assume !(~n == 1); 8683#L11 call #t~ret0 := fibo(~n - 1);< 8687#fiboENTRY ~n := #in~n; 8691#L6 assume !(~n < 1); 8685#L8 assume !(~n == 1); 8680#L11 call #t~ret0 := fibo(~n - 1);< 8684#fiboENTRY ~n := #in~n; 8710#L6 assume !(~n < 1); 8709#L8 assume !(~n == 1); 8609#L11 call #t~ret0 := fibo(~n - 1);< 8704#fiboENTRY ~n := #in~n; 8719#L6 assume !(~n < 1); 8718#L8 assume !(~n == 1); 8608#L11 call #t~ret0 := fibo(~n - 1);< 8704#fiboENTRY ~n := #in~n; 8719#L6 assume !(~n < 1); 8718#L8 assume !(~n == 1); 8608#L11 call #t~ret0 := fibo(~n - 1);< 8704#fiboENTRY ~n := #in~n; 8719#L6 assume !(~n < 1); 8718#L8 assume !(~n == 1); 8608#L11 call #t~ret0 := fibo(~n - 1);< 8704#fiboENTRY ~n := #in~n; 8720#L6 assume !(~n < 1); 8814#L8 assume ~n == 1;#res := 1; 8812#fiboFINAL assume true; 8810#fiboEXIT >#33#return; 8607#L11-1 call #t~ret1 := fibo(~n - 2);< 8610#fiboENTRY ~n := #in~n; 8767#L6 assume ~n < 1;#res := 0; 8762#fiboFINAL assume true; 8758#fiboEXIT >#35#return; 8742#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8739#fiboFINAL assume true; 8732#fiboEXIT >#33#return; 8727#L11-1 call #t~ret1 := fibo(~n - 2);< 8729#fiboENTRY ~n := #in~n; 8737#L6 assume !(~n < 1); 8735#L8 assume ~n == 1;#res := 1; 8624#fiboFINAL assume true; 8726#fiboEXIT >#35#return; 8694#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 8721#fiboFINAL assume true; 8695#fiboEXIT >#33#return; 8621#L11-1 call #t~ret1 := fibo(~n - 2);< 8701#fiboENTRY ~n := #in~n; 8631#L6 assume !(~n < 1); 8620#L8 assume !(~n == 1); 8572#L11 call #t~ret0 := fibo(~n - 1);< 8613#fiboENTRY ~n := #in~n; 8832#L6 assume !(~n < 1); 8833#L8 assume !(~n == 1); 8635#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8659#L6 assume !(~n < 1); 8657#L8 assume !(~n == 1); 8633#L11 [2018-11-09 23:08:29,438 INFO L795 eck$LassoCheckResult]: Loop: 8633#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8659#L6 assume !(~n < 1); 8657#L8 assume !(~n == 1); 8633#L11 [2018-11-09 23:08:29,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1780673760, now seen corresponding path program 3 times [2018-11-09 23:08:29,438 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:29,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:29,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:29,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:08:29,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 157 proven. 95 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-09 23:08:29,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-09 23:08:29,566 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-09 23:08:29,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-09 23:08:29,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-09 23:08:29,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-09 23:08:29,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 144 proven. 21 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-11-09 23:08:29,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-09 23:08:29,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 26 [2018-11-09 23:08:29,681 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-11-09 23:08:29,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 4 times [2018-11-09 23:08:29,681 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-09 23:08:29,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-09 23:08:29,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:29,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-09 23:08:29,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-09 23:08:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-09 23:08:29,709 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:29,709 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:29,709 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:29,709 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:29,709 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-09 23:08:29,709 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:29,710 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:29,710 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:29,710 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration7_Loop [2018-11-09 23:08:29,710 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:29,710 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:29,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:29,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:29,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:29,716 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:29,740 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:29,740 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:29,742 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:29,742 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:29,744 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-09 23:08:29,744 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:29,759 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-09 23:08:29,759 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7054bdcc-6269-4248-9f98-8197a3e3d215/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:29,778 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-09 23:08:29,778 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-09 23:08:30,767 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-09 23:08:30,768 INFO L214 LassoAnalysis]: Preferences: [2018-11-09 23:08:30,768 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-09 23:08:30,768 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-09 23:08:30,768 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-09 23:08:30,769 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-09 23:08:30,769 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-09 23:08:30,769 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-09 23:08:30,769 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-09 23:08:30,769 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_7_true-unreach-call_true-termination.c_Iteration7_Loop [2018-11-09 23:08:30,769 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-09 23:08:30,769 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-09 23:08:30,769 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:30,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:30,775 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:30,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-09 23:08:30,797 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-09 23:08:30,798 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-09 23:08:30,798 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 [2018-11-09 23:08:30,798 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:30,798 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:30,798 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:30,798 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:30,798 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:30,799 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:30,799 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:30,799 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-09 23:08:30,799 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 [2018-11-09 23:08:30,799 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-09 23:08:30,800 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-09 23:08:30,800 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-09 23:08:30,800 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-09 23:08:30,800 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-09 23:08:30,800 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-09 23:08:30,800 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-09 23:08:30,801 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-09 23:08:30,803 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-09 23:08:30,803 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-09 23:08:30,803 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-09 23:08:30,803 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-09 23:08:30,803 INFO L517 LassoAnalysis]: Proved termination. [2018-11-09 23:08:30,804 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-11-09 23:08:30,804 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-09 23:08:30,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:30,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:30,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:30,894 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-09 23:08:30,894 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-09 23:08:30,923 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 286 states and 381 transitions. Complement of second has 18 states. [2018-11-09 23:08:30,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-09 23:08:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-09 23:08:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2018-11-09 23:08:30,923 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 65 letters. Loop has 4 letters. [2018-11-09 23:08:30,924 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:30,924 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-09 23:08:30,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:30,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:30,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:31,011 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-09 23:08:31,011 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-09 23:08:31,056 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 292 states and 387 transitions. Complement of second has 17 states. [2018-11-09 23:08:31,057 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 [2018-11-09 23:08:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-09 23:08:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2018-11-09 23:08:31,057 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 65 letters. Loop has 4 letters. [2018-11-09 23:08:31,057 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:31,057 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-09 23:08:31,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-09 23:08:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:31,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-09 23:08:31,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-09 23:08:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-09 23:08:31,153 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2018-11-09 23:08:31,153 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98 Second operand 6 states. [2018-11-09 23:08:31,190 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 271 states and 365 transitions. cyclomatic complexity: 98. Second operand 6 states. Result 350 states and 463 transitions. Complement of second has 27 states. [2018-11-09 23:08:31,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-09 23:08:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-09 23:08:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2018-11-09 23:08:31,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 65 letters. Loop has 4 letters. [2018-11-09 23:08:31,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:31,192 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2018-11-09 23:08:31,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:31,192 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 65 letters. Loop has 8 letters. [2018-11-09 23:08:31,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-09 23:08:31,192 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 350 states and 463 transitions. [2018-11-09 23:08:31,195 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2018-11-09 23:08:31,197 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 350 states to 275 states and 370 transitions. [2018-11-09 23:08:31,197 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 112 [2018-11-09 23:08:31,198 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 123 [2018-11-09 23:08:31,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 275 states and 370 transitions. [2018-11-09 23:08:31,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-09 23:08:31,198 INFO L705 BuchiCegarLoop]: Abstraction has 275 states and 370 transitions. [2018-11-09 23:08:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states and 370 transitions. [2018-11-09 23:08:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 271. [2018-11-09 23:08:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-11-09 23:08:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 365 transitions. [2018-11-09 23:08:31,205 INFO L728 BuchiCegarLoop]: Abstraction has 271 states and 365 transitions. [2018-11-09 23:08:31,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-09 23:08:31,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2018-11-09 23:08:31,205 INFO L87 Difference]: Start difference. First operand 271 states and 365 transitions. Second operand 26 states. [2018-11-09 23:08:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-09 23:08:31,647 INFO L93 Difference]: Finished difference Result 295 states and 336 transitions. [2018-11-09 23:08:31,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-09 23:08:31,648 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 295 states and 336 transitions. [2018-11-09 23:08:31,650 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-09 23:08:31,650 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 295 states to 0 states and 0 transitions. [2018-11-09 23:08:31,650 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-09 23:08:31,651 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-09 23:08:31,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-09 23:08:31,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-09 23:08:31,651 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-09 23:08:31,651 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-09 23:08:31,651 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-09 23:08:31,651 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-09 23:08:31,651 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-09 23:08:31,651 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-09 23:08:31,651 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-09 23:08:31,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.11 11:08:31 BoogieIcfgContainer [2018-11-09 23:08:31,657 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-09 23:08:31,657 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-09 23:08:31,657 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-09 23:08:31,657 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-09 23:08:31,658 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 11:08:20" (3/4) ... [2018-11-09 23:08:31,663 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-09 23:08:31,663 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-09 23:08:31,664 INFO L168 Benchmark]: Toolchain (without parser) took 11244.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.9 MB). Free memory was 960.3 MB in the beginning and 963.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 188.5 MB. Max. memory is 11.5 GB. [2018-11-09 23:08:31,665 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-09 23:08:31,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.27 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-09 23:08:31,665 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.82 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-09 23:08:31,666 INFO L168 Benchmark]: Boogie Preprocessor took 9.12 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-09 23:08:31,666 INFO L168 Benchmark]: RCFGBuilder took 148.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -180.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-11-09 23:08:31,666 INFO L168 Benchmark]: BuchiAutomizer took 10916.66 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 55.1 MB). Free memory was 1.1 GB in the beginning and 963.7 MB in the end (delta: 163.7 MB). Peak memory consumption was 218.7 MB. Max. memory is 11.5 GB. [2018-11-09 23:08:31,667 INFO L168 Benchmark]: Witness Printer took 5.91 ms. Allocated memory is still 1.2 GB. Free memory is still 963.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-09 23:08:31,669 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 145.27 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.82 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.12 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 148.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -180.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 10916.66 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 55.1 MB). Free memory was 1.1 GB in the beginning and 963.7 MB in the end (delta: 163.7 MB). Peak memory consumption was 218.7 MB. Max. memory is 11.5 GB. * Witness Printer took 5.91 ms. Allocated memory is still 1.2 GB. Free memory is still 963.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (6 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 6 modules have a trivial ranking function, the largest among these consists of 26 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.8s and 8 iterations. TraceHistogramMax:13. Analysis of lassos took 7.3s. Construction of modules took 0.7s. Büchi inclusion checks took 2.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 342 StatesRemovedByMinimization, 10 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 370 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 262 SDtfs, 631 SDslu, 392 SDs, 0 SdLazy, 1339 SolverSat, 416 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf98 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq187 hnf92 smp81 dnf100 smp100 tf109 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 7ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 7 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...