./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_false-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_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/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 d98587a14b872cd91c7aef8f28f1f51cdacaf3d4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 06:06:14,752 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:06:14,754 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:06:14,764 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:06:14,765 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:06:14,765 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:06:14,766 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:06:14,767 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:06:14,768 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:06:14,769 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:06:14,770 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:06:14,770 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:06:14,770 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:06:14,772 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:06:14,773 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:06:14,773 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:06:14,774 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:06:14,776 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:06:14,777 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:06:14,778 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:06:14,779 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:06:14,780 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:06:14,781 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:06:14,781 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:06:14,782 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:06:14,782 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:06:14,784 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:06:14,784 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:06:14,785 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:06:14,786 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:06:14,786 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:06:14,786 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:06:14,787 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:06:14,787 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:06:14,788 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:06:14,788 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:06:14,789 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-10-27 06:06:14,800 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:06:14,800 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:06:14,801 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 06:06:14,801 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 06:06:14,801 INFO L133 SettingsManager]: * Use SBE=true [2018-10-27 06:06:14,801 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-10-27 06:06:14,802 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-10-27 06:06:14,802 INFO L133 SettingsManager]: * Use old map elimination=false [2018-10-27 06:06:14,802 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-10-27 06:06:14,802 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-10-27 06:06:14,802 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-10-27 06:06:14,802 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:06:14,802 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 06:06:14,804 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 06:06:14,804 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:06:14,804 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 06:06:14,804 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:06:14,804 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-10-27 06:06:14,804 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-10-27 06:06:14,804 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-10-27 06:06:14,805 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 06:06:14,805 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:06:14,805 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-10-27 06:06:14,805 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-10-27 06:06:14,805 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:06:14,805 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:06:14,805 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-10-27 06:06:14,806 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:06:14,806 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-27 06:06:14,806 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-10-27 06:06:14,807 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-27 06:06:14,807 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_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/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 -> d98587a14b872cd91c7aef8f28f1f51cdacaf3d4 [2018-10-27 06:06:14,834 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:06:14,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:06:14,850 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:06:14,851 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:06:14,855 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:06:14,856 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_false-unreach-call_true-termination.c [2018-10-27 06:06:14,901 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/data/5c1670801/034f43f84a934a45b65100d51c6e274f/FLAGe971611c2 [2018-10-27 06:06:15,245 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:06:15,245 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/sv-benchmarks/c/recursive-simple/fibo_2calls_6_false-unreach-call_true-termination.c [2018-10-27 06:06:15,250 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/data/5c1670801/034f43f84a934a45b65100d51c6e274f/FLAGe971611c2 [2018-10-27 06:06:15,260 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/data/5c1670801/034f43f84a934a45b65100d51c6e274f [2018-10-27 06:06:15,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:06:15,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 06:06:15,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:06:15,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:06:15,271 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:06:15,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c4ac005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15, skipping insertion in model container [2018-10-27 06:06:15,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,281 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:06:15,292 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:06:15,410 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:06:15,413 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:06:15,425 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:06:15,435 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:06:15,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15 WrapperNode [2018-10-27 06:06:15,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:06:15,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:06:15,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:06:15,437 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:06:15,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:06:15,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:06:15,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:06:15,460 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:06:15,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... [2018-10-27 06:06:15,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:06:15,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:06:15,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:06:15,471 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:06:15,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:15,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:06:15,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:06:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-10-27 06:06:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-10-27 06:06:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-10-27 06:06:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-10-27 06:06:15,890 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:06:15,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:06:15 BoogieIcfgContainer [2018-10-27 06:06:15,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:06:15,891 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-10-27 06:06:15,891 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-10-27 06:06:15,894 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-10-27 06:06:15,907 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:06:15,907 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.10 06:06:15" (1/3) ... [2018-10-27 06:06:15,908 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7c83caa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:06:15, skipping insertion in model container [2018-10-27 06:06:15,909 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:06:15,909 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:06:15" (2/3) ... [2018-10-27 06:06:15,909 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7c83caa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:06:15, skipping insertion in model container [2018-10-27 06:06:15,909 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:06:15,909 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:06:15" (3/3) ... [2018-10-27 06:06:15,911 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_6_false-unreach-call_true-termination.c [2018-10-27 06:06:16,005 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-27 06:06:16,006 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-10-27 06:06:16,006 INFO L375 BuchiCegarLoop]: Hoare is false [2018-10-27 06:06:16,006 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-10-27 06:06:16,006 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:06:16,006 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:06:16,006 INFO L379 BuchiCegarLoop]: Difference is false [2018-10-27 06:06:16,006 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:06:16,007 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-10-27 06:06:16,034 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states. [2018-10-27 06:06:16,066 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-10-27 06:06:16,066 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:16,066 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:16,080 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:06:16,080 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:16,080 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-10-27 06:06:16,080 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states. [2018-10-27 06:06:16,082 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-10-27 06:06:16,082 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:16,082 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:16,084 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:06:16,085 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:16,091 INFO L793 eck$LassoCheckResult]: Stem: 24#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 17#L37true call main_#t~ret4 := fibo1(main_~x~0);< 25#fibo1ENTRYtrue [2018-10-27 06:06:16,092 INFO L795 eck$LassoCheckResult]: Loop: 25#fibo1ENTRYtrue ~n := #in~n; 13#L8true assume !(~n < 1); 4#L10true assume !(~n == 1); 19#L13true call #t~ret0 := fibo2(~n - 1);< 11#fibo2ENTRYtrue ~n := #in~n; 28#L18true assume !(~n < 1); 26#L20true assume !(~n == 1); 3#L23true call #t~ret2 := fibo1(~n - 1);< 25#fibo1ENTRYtrue [2018-10-27 06:06:16,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:16,098 INFO L82 PathProgramCache]: Analyzing trace with hash 29896, now seen corresponding path program 1 times [2018-10-27 06:06:16,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:16,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:16,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:16,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:16,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:16,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash 181289832, now seen corresponding path program 1 times [2018-10-27 06:06:16,187 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:16,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:16,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:16,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1313669423, now seen corresponding path program 1 times [2018-10-27 06:06:16,204 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:16,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:16,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:16,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:16,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:16,576 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-27 06:06:16,599 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:16,600 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:16,600 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:16,600 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:16,600 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:06:16,600 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:16,601 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:16,601 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:16,601 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration1_Loop [2018-10-27 06:06:16,601 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:16,601 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:16,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,639 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,644 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:16,885 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:16,885 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/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 [2018-10-27 06:06:16,889 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:16,889 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:16,900 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:16,900 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/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 [2018-10-27 06:06:16,923 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:16,923 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:16,927 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:16,927 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:16,946 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:16,946 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:16,959 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:16,959 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:16,977 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:16,977 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:16,980 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:16,980 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:16,998 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:16,998 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:17,027 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:17,027 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret3=0} Honda state: {fibo2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/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) [2018-10-27 06:06:17,056 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:17,056 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:17,067 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:17,067 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 8 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:17,093 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:17,093 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:17,099 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:17,099 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/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) [2018-10-27 06:06:17,118 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:17,118 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:17,123 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:17,124 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret1=0} Honda state: {fibo1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:17,150 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:17,150 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:17,162 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:17,162 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret0=0} Honda state: {fibo1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 11 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:17,182 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:17,182 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:17,205 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:06:17,205 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:17,267 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:06:17,269 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:17,269 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:17,269 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:17,269 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:17,270 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:06:17,270 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:17,270 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:17,270 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:17,270 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration1_Loop [2018-10-27 06:06:17,270 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:17,270 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:17,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:17,603 WARN L179 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-10-27 06:06:17,879 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-27 06:06:17,901 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:17,905 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:06:17,907 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:17,908 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:17,908 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:17,909 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:17,909 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:17,909 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:17,911 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:17,911 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:17,914 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:17,915 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:17,915 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:17,915 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:17,916 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:17,916 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:17,916 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:17,916 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:17,917 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:17,918 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:17,918 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:17,919 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:17,919 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:17,919 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:17,919 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:17,919 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:17,919 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:17,920 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:17,921 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:17,921 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:17,922 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:17,922 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:17,922 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:17,922 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:17,922 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:17,923 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:17,923 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:17,924 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:17,925 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:17,925 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:17,925 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:17,926 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:17,926 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:17,926 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:17,926 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:17,926 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:17,928 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:17,928 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:17,929 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:17,929 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:17,929 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:17,929 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:17,929 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:17,929 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:17,930 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:17,931 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:17,931 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:17,932 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:17,932 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:17,932 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:17,932 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:17,932 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:17,933 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:17,933 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:17,934 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:17,935 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:17,935 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:17,935 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:17,936 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:17,936 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:17,936 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:17,936 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:17,936 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:17,938 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:17,938 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:17,939 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:17,939 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:17,939 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:17,939 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:17,939 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:17,940 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:17,940 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:17,945 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:06:17,956 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:06:17,956 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:06:17,958 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:06:17,958 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:06:17,958 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:06:17,958 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2018-10-27 06:06:17,959 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:06:18,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:18,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:18,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:18,321 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2018-10-27 06:06:18,322 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 26 states. Second operand 6 states. [2018-10-27 06:06:18,678 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 26 states.. Second operand 6 states. Result 84 states and 116 transitions. Complement of second has 24 states. [2018-10-27 06:06:18,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-27 06:06:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2018-10-27 06:06:18,685 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2018-10-27 06:06:18,687 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:18,687 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2018-10-27 06:06:18,687 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:18,687 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2018-10-27 06:06:18,688 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:18,689 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 84 states and 116 transitions. [2018-10-27 06:06:18,696 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-10-27 06:06:18,704 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 84 states to 61 states and 82 transitions. [2018-10-27 06:06:18,705 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2018-10-27 06:06:18,705 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2018-10-27 06:06:18,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2018-10-27 06:06:18,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:18,708 INFO L705 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2018-10-27 06:06:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2018-10-27 06:06:18,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2018-10-27 06:06:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-27 06:06:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2018-10-27 06:06:18,738 INFO L728 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2018-10-27 06:06:18,738 INFO L608 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2018-10-27 06:06:18,738 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-10-27 06:06:18,738 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2018-10-27 06:06:18,740 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-10-27 06:06:18,740 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:18,740 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:18,741 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:18,741 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:18,742 INFO L793 eck$LassoCheckResult]: Stem: 231#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 227#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 214#L37 call main_#t~ret4 := fibo1(main_~x~0);< 216#fibo1ENTRY ~n := #in~n; 228#L8 assume !(~n < 1); 213#L10 assume !(~n == 1); 205#L13 call #t~ret0 := fibo2(~n - 1);< 221#fibo2ENTRY ~n := #in~n; 248#L18 assume !(~n < 1); 249#L20 assume !(~n == 1); 200#L23 call #t~ret2 := fibo1(~n - 1);< 203#fibo1ENTRY ~n := #in~n; 229#L8 assume ~n < 1;#res := 0; 212#fibo1FINAL assume true; 219#fibo1EXIT >#46#return; 215#L23-1 [2018-10-27 06:06:18,742 INFO L795 eck$LassoCheckResult]: Loop: 215#L23-1 call #t~ret3 := fibo1(~n - 2);< 199#fibo1ENTRY ~n := #in~n; 244#L8 assume !(~n < 1); 242#L10 assume !(~n == 1); 198#L13 call #t~ret0 := fibo2(~n - 1);< 222#fibo2ENTRY ~n := #in~n; 241#L18 assume !(~n < 1); 237#L20 assume !(~n == 1); 196#L23 call #t~ret2 := fibo1(~n - 1);< 199#fibo1ENTRY ~n := #in~n; 244#L8 assume ~n < 1;#res := 0; 224#fibo1FINAL assume true; 225#fibo1EXIT >#46#return; 215#L23-1 [2018-10-27 06:06:18,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:18,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1888024054, now seen corresponding path program 1 times [2018-10-27 06:06:18,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:18,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:18,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:18,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:18,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 06:06:18,871 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:06:18,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 06:06:18,872 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:06:18,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1730504828, now seen corresponding path program 1 times [2018-10-27 06:06:18,873 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:18,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:18,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:18,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:18,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 06:06:18,936 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:06:18,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 06:06:18,937 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-10-27 06:06:18,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:06:18,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:06:18,940 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2018-10-27 06:06:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:06:19,061 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2018-10-27 06:06:19,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 06:06:19,063 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2018-10-27 06:06:19,066 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-10-27 06:06:19,068 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2018-10-27 06:06:19,069 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2018-10-27 06:06:19,069 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2018-10-27 06:06:19,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2018-10-27 06:06:19,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:19,069 INFO L705 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2018-10-27 06:06:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2018-10-27 06:06:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2018-10-27 06:06:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-27 06:06:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2018-10-27 06:06:19,077 INFO L728 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2018-10-27 06:06:19,077 INFO L608 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2018-10-27 06:06:19,077 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-10-27 06:06:19,077 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2018-10-27 06:06:19,080 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-10-27 06:06:19,080 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:19,080 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:19,081 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:19,081 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:19,081 INFO L793 eck$LassoCheckResult]: Stem: 365#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 364#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 343#L37 call main_#t~ret4 := fibo1(main_~x~0);< 344#fibo1ENTRY ~n := #in~n; 372#L8 assume !(~n < 1); 348#L10 assume !(~n == 1); 339#L13 call #t~ret0 := fibo2(~n - 1);< 358#fibo2ENTRY ~n := #in~n; 388#L18 assume !(~n < 1); 389#L20 assume !(~n == 1); 337#L23 call #t~ret2 := fibo1(~n - 1);< 342#fibo1ENTRY ~n := #in~n; 367#L8 assume !(~n < 1); 383#L10 assume ~n == 1;#res := 1; 382#fibo1FINAL assume true; 378#fibo1EXIT >#46#return; 346#L23-1 [2018-10-27 06:06:19,081 INFO L795 eck$LassoCheckResult]: Loop: 346#L23-1 call #t~ret3 := fibo1(~n - 2);< 336#fibo1ENTRY ~n := #in~n; 366#L8 assume !(~n < 1); 345#L10 assume !(~n == 1); 335#L13 call #t~ret0 := fibo2(~n - 1);< 381#fibo2ENTRY ~n := #in~n; 386#L18 assume !(~n < 1); 376#L20 assume !(~n == 1); 333#L23 call #t~ret2 := fibo1(~n - 1);< 336#fibo1ENTRY ~n := #in~n; 366#L8 assume !(~n < 1); 345#L10 assume ~n == 1;#res := 1; 347#fibo1FINAL assume true; 362#fibo1EXIT >#46#return; 346#L23-1 [2018-10-27 06:06:19,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:19,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1600771562, now seen corresponding path program 1 times [2018-10-27 06:06:19,082 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:19,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:19,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:19,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:19,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:19,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:19,213 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:06:19,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:19,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:19,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:06:19,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-27 06:06:19,251 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:06:19,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:19,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2106067024, now seen corresponding path program 1 times [2018-10-27 06:06:19,252 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:19,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:19,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:19,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:19,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:19,397 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:19,398 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:19,398 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:19,398 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:19,398 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:06:19,398 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:19,398 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:19,398 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:19,398 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration3_Loop [2018-10-27 06:06:19,398 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:19,399 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:19,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:19,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:19,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:19,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:19,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:19,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:19,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:19,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:19,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:19,456 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:19,456 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 14 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:19,459 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:19,460 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:19,462 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:19,463 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:19,480 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:19,481 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:19,482 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:19,483 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:19,500 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:19,500 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:19,520 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:06:19,520 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:20,437 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:06:20,438 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:20,438 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:20,438 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:20,438 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:20,438 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:06:20,439 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:20,439 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:20,439 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:20,439 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration3_Loop [2018-10-27 06:06:20,439 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:20,439 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:20,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:20,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:20,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:20,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:20,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:20,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:20,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:20,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:20,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:20,570 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:20,570 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:06:20,570 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:20,571 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:20,571 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:20,571 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:20,572 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:20,572 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:20,572 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:20,572 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:20,576 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:20,576 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:20,577 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:20,577 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:20,577 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:20,577 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:20,577 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:20,578 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:20,578 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:20,578 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:20,583 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:20,583 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:20,583 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:20,583 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:20,584 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:20,584 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:20,584 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:20,584 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:20,592 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:06:20,596 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:06:20,596 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:06:20,596 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:06:20,596 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:06:20,596 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:06:20,596 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2018-10-27 06:06:20,597 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:06:20,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:20,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:20,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:20,782 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2018-10-27 06:06:20,782 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 9 states. [2018-10-27 06:06:21,075 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 9 states. Result 191 states and 263 transitions. Complement of second has 26 states. [2018-10-27 06:06:21,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-27 06:06:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2018-10-27 06:06:21,077 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 68 transitions. Stem has 16 letters. Loop has 14 letters. [2018-10-27 06:06:21,077 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:21,077 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 68 transitions. Stem has 30 letters. Loop has 14 letters. [2018-10-27 06:06:21,078 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:21,078 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 68 transitions. Stem has 16 letters. Loop has 28 letters. [2018-10-27 06:06:21,078 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:21,079 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2018-10-27 06:06:21,084 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-10-27 06:06:21,088 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2018-10-27 06:06:21,088 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2018-10-27 06:06:21,089 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2018-10-27 06:06:21,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2018-10-27 06:06:21,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:21,090 INFO L705 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2018-10-27 06:06:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2018-10-27 06:06:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2018-10-27 06:06:21,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-27 06:06:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2018-10-27 06:06:21,108 INFO L728 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2018-10-27 06:06:21,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 06:06:21,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-27 06:06:21,109 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 9 states. [2018-10-27 06:06:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:06:21,249 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2018-10-27 06:06:21,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 06:06:21,250 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2018-10-27 06:06:21,254 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-10-27 06:06:21,260 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2018-10-27 06:06:21,261 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2018-10-27 06:06:21,262 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2018-10-27 06:06:21,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2018-10-27 06:06:21,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:21,268 INFO L705 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2018-10-27 06:06:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2018-10-27 06:06:21,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2018-10-27 06:06:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-27 06:06:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2018-10-27 06:06:21,281 INFO L728 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2018-10-27 06:06:21,281 INFO L608 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2018-10-27 06:06:21,281 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-10-27 06:06:21,281 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2018-10-27 06:06:21,285 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-10-27 06:06:21,286 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:21,286 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:21,289 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-27 06:06:21,289 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-10-27 06:06:21,290 INFO L793 eck$LassoCheckResult]: Stem: 1176#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1171#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 1154#L37 call main_#t~ret4 := fibo1(main_~x~0);< 1155#fibo1ENTRY ~n := #in~n; 1219#L8 assume !(~n < 1); 1218#L10 assume !(~n == 1); 1132#L13 call #t~ret0 := fibo2(~n - 1);< 1164#fibo2ENTRY ~n := #in~n; 1281#L18 assume !(~n < 1); 1280#L20 assume !(~n == 1); 1167#L23 call #t~ret2 := fibo1(~n - 1);< 1130#fibo1ENTRY ~n := #in~n; 1216#L8 assume !(~n < 1); 1215#L10 assume !(~n == 1); 1128#L13 call #t~ret0 := fibo2(~n - 1);< 1208#fibo2ENTRY ~n := #in~n; 1212#L18 assume !(~n < 1); 1213#L20 assume !(~n == 1); 1127#L23 call #t~ret2 := fibo1(~n - 1);< 1130#fibo1ENTRY ~n := #in~n; 1216#L8 assume !(~n < 1); 1215#L10 assume !(~n == 1); 1128#L13 call #t~ret0 := fibo2(~n - 1);< 1208#fibo2ENTRY ~n := #in~n; 1212#L18 assume ~n < 1;#res := 0; 1211#fibo2FINAL assume true; 1207#fibo2EXIT >#50#return; 1129#L13-1 call #t~ret1 := fibo2(~n - 2);< 1168#fibo2ENTRY ~n := #in~n; 1178#L18 assume !(~n < 1); 1185#L20 assume !(~n == 1); 1127#L23 call #t~ret2 := fibo1(~n - 1);< 1130#fibo1ENTRY ~n := #in~n; 1217#L8 assume !(~n < 1); 1223#L10 assume ~n == 1;#res := 1; 1222#fibo1FINAL assume true; 1220#fibo1EXIT >#46#return; 1204#L23-1 call #t~ret3 := fibo1(~n - 2);< 1136#fibo1ENTRY ~n := #in~n; 1210#L8 assume !(~n < 1); 1206#L10 assume !(~n == 1); 1134#L13 call #t~ret0 := fibo2(~n - 1);< 1203#fibo2ENTRY ~n := #in~n; 1200#L18 assume ~n < 1;#res := 0; 1201#fibo2FINAL assume true; 1209#fibo2EXIT >#50#return; 1135#L13-1 call #t~ret1 := fibo2(~n - 2);< 1203#fibo2ENTRY ~n := #in~n; 1200#L18 assume !(~n < 1); 1196#L20 assume ~n == 1;#res := 1; 1137#fibo2FINAL assume true; 1138#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#48#return; 1274#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 1271#fibo2FINAL assume true; 1268#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#46#return; 1162#L23-1 call #t~ret3 := fibo1(~n - 2);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(~n == 1); 1123#L13 call #t~ret0 := fibo2(~n - 1);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#50#return; 1125#L13-1 call #t~ret1 := fibo2(~n - 2);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#48#return; 1274#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 1271#fibo2FINAL assume true; 1268#fibo2EXIT >#50#return; 1125#L13-1 [2018-10-27 06:06:21,290 INFO L795 eck$LassoCheckResult]: Loop: 1125#L13-1 call #t~ret1 := fibo2(~n - 2);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume !(~n < 1); 1183#L20 assume !(~n == 1); 1122#L23 call #t~ret2 := fibo1(~n - 1);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(~n == 1); 1123#L13 call #t~ret0 := fibo2(~n - 1);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume !(~n < 1); 1183#L20 assume !(~n == 1); 1122#L23 call #t~ret2 := fibo1(~n - 1);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(~n == 1); 1123#L13 call #t~ret0 := fibo2(~n - 1);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#50#return; 1125#L13-1 call #t~ret1 := fibo2(~n - 2);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#46#return; 1162#L23-1 call #t~ret3 := fibo1(~n - 2);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(~n == 1); 1123#L13 call #t~ret0 := fibo2(~n - 1);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#50#return; 1125#L13-1 call #t~ret1 := fibo2(~n - 2);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume ~n < 1;#res := 0; 1184#fibo2FINAL assume true; 1269#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1279#fibo1FINAL assume true; 1276#fibo1EXIT >#48#return; 1274#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 1271#fibo2FINAL assume true; 1268#fibo2EXIT >#50#return; 1125#L13-1 [2018-10-27 06:06:21,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:21,290 INFO L82 PathProgramCache]: Analyzing trace with hash 376035563, now seen corresponding path program 1 times [2018-10-27 06:06:21,290 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:21,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:21,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:21,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:21,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-10-27 06:06:21,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:21,371 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-27 06:06:21,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:06:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:21,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-10-27 06:06:21,449 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:06:21,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-10-27 06:06:21,450 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:06:21,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:21,450 INFO L82 PathProgramCache]: Analyzing trace with hash 36254641, now seen corresponding path program 1 times [2018-10-27 06:06:21,450 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:21,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:21,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:21,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:21,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-27 06:06:21,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:21,639 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:06:21,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:21,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-27 06:06:21,700 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 06:06:21,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-10-27 06:06:21,701 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-10-27 06:06:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:06:21,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:06:21,701 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 6 states. [2018-10-27 06:06:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:06:21,744 INFO L93 Difference]: Finished difference Result 184 states and 236 transitions. [2018-10-27 06:06:21,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 06:06:21,746 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 184 states and 236 transitions. [2018-10-27 06:06:21,748 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-10-27 06:06:21,750 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 184 states to 172 states and 222 transitions. [2018-10-27 06:06:21,751 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 110 [2018-10-27 06:06:21,751 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2018-10-27 06:06:21,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 172 states and 222 transitions. [2018-10-27 06:06:21,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:21,752 INFO L705 BuchiCegarLoop]: Abstraction has 172 states and 222 transitions. [2018-10-27 06:06:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states and 222 transitions. [2018-10-27 06:06:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2018-10-27 06:06:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-27 06:06:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 206 transitions. [2018-10-27 06:06:21,762 INFO L728 BuchiCegarLoop]: Abstraction has 158 states and 206 transitions. [2018-10-27 06:06:21,763 INFO L608 BuchiCegarLoop]: Abstraction has 158 states and 206 transitions. [2018-10-27 06:06:21,763 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-10-27 06:06:21,764 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 158 states and 206 transitions. [2018-10-27 06:06:21,765 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-10-27 06:06:21,765 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:21,765 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:21,768 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-10-27 06:06:21,768 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-10-27 06:06:21,769 INFO L793 eck$LassoCheckResult]: Stem: 1925#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1919#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 1894#L37 call main_#t~ret4 := fibo1(main_~x~0);< 1900#fibo1ENTRY ~n := #in~n; 1932#L8 assume !(~n < 1); 1893#L10 assume !(~n == 1); 1895#L13 call #t~ret0 := fibo2(~n - 1);< 1909#fibo2ENTRY ~n := #in~n; 1927#L18 assume !(~n < 1); 1934#L20 assume !(~n == 1); 1915#L23 call #t~ret2 := fibo1(~n - 1);< 1881#fibo1ENTRY ~n := #in~n; 1923#L8 assume !(~n < 1); 1968#L10 assume !(~n == 1); 1879#L13 call #t~ret0 := fibo2(~n - 1);< 1963#fibo2ENTRY ~n := #in~n; 1967#L18 assume !(~n < 1); 1965#L20 assume !(~n == 1); 1878#L23 call #t~ret2 := fibo1(~n - 1);< 1881#fibo1ENTRY ~n := #in~n; 1923#L8 assume !(~n < 1); 1968#L10 assume !(~n == 1); 1879#L13 call #t~ret0 := fibo2(~n - 1);< 1963#fibo2ENTRY ~n := #in~n; 1967#L18 assume !(~n < 1); 1965#L20 assume ~n == 1;#res := 1; 1962#fibo2FINAL assume true; 1930#fibo2EXIT >#50#return; 1880#L13-1 call #t~ret1 := fibo2(~n - 2);< 1916#fibo2ENTRY ~n := #in~n; 2012#L18 assume !(~n < 1); 2011#L20 assume !(~n == 1); 1878#L23 call #t~ret2 := fibo1(~n - 1);< 1881#fibo1ENTRY ~n := #in~n; 1924#L8 assume !(~n < 1); 1971#L10 assume ~n == 1;#res := 1; 1970#fibo1FINAL assume true; 1969#fibo1EXIT >#46#return; 1891#L23-1 call #t~ret3 := fibo1(~n - 2);< 1899#fibo1ENTRY ~n := #in~n; 1959#L8 assume !(~n < 1); 1957#L10 assume !(~n == 1); 1898#L13 call #t~ret0 := fibo2(~n - 1);< 1955#fibo2ENTRY ~n := #in~n; 1953#L18 assume !(~n < 1); 1947#L20 assume ~n == 1;#res := 1; 1948#fibo2FINAL assume true; 1928#fibo2EXIT >#50#return; 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume ~n < 1;#res := 0; 1937#fibo2FINAL assume true; 2018#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#48#return; 2006#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 1993#fibo2FINAL assume true; 1987#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#46#return; 1991#L23-1 call #t~ret3 := fibo1(~n - 2);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(~n == 1); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume ~n == 1;#res := 1; 2005#fibo2FINAL assume true; 2004#fibo2EXIT >#50#return; 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume ~n < 1;#res := 0; 1937#fibo2FINAL assume true; 2018#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#48#return; 2006#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 1993#fibo2FINAL assume true; 1987#fibo2EXIT >#50#return; 1929#L13-1 [2018-10-27 06:06:21,769 INFO L795 eck$LassoCheckResult]: Loop: 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume !(~n == 1); 1990#L23 call #t~ret2 := fibo1(~n - 1);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(~n == 1); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume !(~n == 1); 1990#L23 call #t~ret2 := fibo1(~n - 1);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(~n == 1); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume ~n == 1;#res := 1; 2005#fibo2FINAL assume true; 2004#fibo2EXIT >#50#return; 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume ~n < 1;#res := 0; 1937#fibo2FINAL assume true; 2018#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#46#return; 1991#L23-1 call #t~ret3 := fibo1(~n - 2);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(~n == 1); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume ~n == 1;#res := 1; 2005#fibo2FINAL assume true; 2004#fibo2EXIT >#50#return; 1929#L13-1 call #t~ret1 := fibo2(~n - 2);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume ~n < 1;#res := 0; 1937#fibo2FINAL assume true; 2018#fibo2EXIT >#52#return; 1988#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 2017#fibo1FINAL assume true; 2007#fibo1EXIT >#48#return; 2006#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 1993#fibo2FINAL assume true; 1987#fibo2EXIT >#50#return; 1929#L13-1 [2018-10-27 06:06:21,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash 821073247, now seen corresponding path program 2 times [2018-10-27 06:06:21,769 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:21,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:21,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:21,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:21,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 31 proven. 84 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-27 06:06:21,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:21,899 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:06:21,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 06:06:21,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 06:06:21,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 06:06:21,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 31 proven. 84 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-27 06:06:21,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:06:21,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-27 06:06:21,984 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:06:21,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:21,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1445694181, now seen corresponding path program 1 times [2018-10-27 06:06:21,984 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:21,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:21,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:21,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:06:21,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-27 06:06:22,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:22,112 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:06:22,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:22,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-27 06:06:22,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:06:22,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2018-10-27 06:06:22,240 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-10-27 06:06:22,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 06:06:22,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-10-27 06:06:22,240 INFO L87 Difference]: Start difference. First operand 158 states and 206 transitions. cyclomatic complexity: 53 Second operand 13 states. [2018-10-27 06:06:22,467 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2018-10-27 06:06:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:06:22,807 INFO L93 Difference]: Finished difference Result 209 states and 285 transitions. [2018-10-27 06:06:22,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 06:06:22,808 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 209 states and 285 transitions. [2018-10-27 06:06:22,810 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 30 [2018-10-27 06:06:22,812 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 209 states to 209 states and 285 transitions. [2018-10-27 06:06:22,812 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 139 [2018-10-27 06:06:22,817 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2018-10-27 06:06:22,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 209 states and 285 transitions. [2018-10-27 06:06:22,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:22,818 INFO L705 BuchiCegarLoop]: Abstraction has 209 states and 285 transitions. [2018-10-27 06:06:22,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states and 285 transitions. [2018-10-27 06:06:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2018-10-27 06:06:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-27 06:06:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 263 transitions. [2018-10-27 06:06:22,841 INFO L728 BuchiCegarLoop]: Abstraction has 192 states and 263 transitions. [2018-10-27 06:06:22,841 INFO L608 BuchiCegarLoop]: Abstraction has 192 states and 263 transitions. [2018-10-27 06:06:22,841 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-10-27 06:06:22,841 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 192 states and 263 transitions. [2018-10-27 06:06:22,842 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 30 [2018-10-27 06:06:22,842 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:22,846 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:22,847 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:22,847 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:22,847 INFO L793 eck$LassoCheckResult]: Stem: 2745#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 2738#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 2708#L37 call main_#t~ret4 := fibo1(main_~x~0);< 2709#fibo1ENTRY ~n := #in~n; 2785#L8 assume !(~n < 1); 2784#L10 assume !(~n == 1); 2727#L13 call #t~ret0 := fibo2(~n - 1);< 2728#fibo2ENTRY ~n := #in~n; 2747#L18 assume !(~n < 1); 2753#L20 assume !(~n == 1); 2732#L23 call #t~ret2 := fibo1(~n - 1);< 2840#fibo1ENTRY ~n := #in~n; 2841#L8 assume !(~n < 1); 2838#L10 assume !(~n == 1); 2698#L13 call #t~ret0 := fibo2(~n - 1);< 2781#fibo2ENTRY ~n := #in~n; 2845#L18 assume !(~n < 1); 2844#L20 assume ~n == 1;#res := 1; 2697#fibo2FINAL assume true; 2699#fibo2EXIT >#50#return; 2693#L13-1 call #t~ret1 := fibo2(~n - 2);< 2734#fibo2ENTRY ~n := #in~n; 2846#L18 assume !(~n < 1); 2752#L20 assume !(~n == 1); 2691#L23 call #t~ret2 := fibo1(~n - 1);< 2694#fibo1ENTRY ~n := #in~n; 2743#L8 assume !(~n < 1); 2707#L10 assume !(~n == 1); 2692#L13 call #t~ret0 := fibo2(~n - 1);< 2787#fibo2ENTRY ~n := #in~n; 2786#L18 assume !(~n < 1); 2783#L20 assume !(~n == 1); 2691#L23 call #t~ret2 := fibo1(~n - 1);< 2694#fibo1ENTRY ~n := #in~n; 2744#L8 assume !(~n < 1); 2790#L10 assume ~n == 1;#res := 1; 2789#fibo1FINAL assume true; 2788#fibo1EXIT >#46#return; 2741#L23-1 call #t~ret3 := fibo1(~n - 2);< 2739#fibo1ENTRY ~n := #in~n; 2742#L8 assume ~n < 1;#res := 0; 2875#fibo1FINAL assume true; 2825#fibo1EXIT >#48#return; 2821#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 2820#fibo2FINAL assume true; 2810#fibo2EXIT >#50#return; 2807#L13-1 [2018-10-27 06:06:22,847 INFO L795 eck$LassoCheckResult]: Loop: 2807#L13-1 call #t~ret1 := fibo2(~n - 2);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume !(~n < 1); 2862#L20 assume !(~n == 1); 2813#L23 call #t~ret2 := fibo1(~n - 1);< 2834#fibo1ENTRY ~n := #in~n; 2831#L8 assume !(~n < 1); 2829#L10 assume !(~n == 1); 2808#L13 call #t~ret0 := fibo2(~n - 1);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume !(~n < 1); 2862#L20 assume !(~n == 1); 2813#L23 call #t~ret2 := fibo1(~n - 1);< 2834#fibo1ENTRY ~n := #in~n; 2831#L8 assume !(~n < 1); 2829#L10 assume !(~n == 1); 2808#L13 call #t~ret0 := fibo2(~n - 1);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume !(~n < 1); 2862#L20 assume ~n == 1;#res := 1; 2848#fibo2FINAL assume true; 2823#fibo2EXIT >#50#return; 2807#L13-1 call #t~ret1 := fibo2(~n - 2);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume ~n < 1;#res := 0; 2851#fibo2FINAL assume true; 2849#fibo2EXIT >#52#return; 2809#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 2860#fibo1FINAL assume true; 2836#fibo1EXIT >#46#return; 2815#L23-1 call #t~ret3 := fibo1(~n - 2);< 2834#fibo1ENTRY ~n := #in~n; 2831#L8 assume ~n < 1;#res := 0; 2832#fibo1FINAL assume true; 2861#fibo1EXIT >#48#return; 2827#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 2819#fibo2FINAL assume true; 2806#fibo2EXIT >#50#return; 2807#L13-1 [2018-10-27 06:06:22,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:22,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1519288695, now seen corresponding path program 1 times [2018-10-27 06:06:22,848 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:22,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:22,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:22,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:22,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-27 06:06:22,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:22,931 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/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 [2018-10-27 06:06:22,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:22,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-10-27 06:06:23,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:06:23,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-10-27 06:06:23,094 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:06:23,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1513837346, now seen corresponding path program 1 times [2018-10-27 06:06:23,094 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:23,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:23,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:23,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:23,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-27 06:06:23,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:23,211 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:06:23,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:23,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-27 06:06:23,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:06:23,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-10-27 06:06:23,441 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-10-27 06:06:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-27 06:06:23,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-27 06:06:23,442 INFO L87 Difference]: Start difference. First operand 192 states and 263 transitions. cyclomatic complexity: 78 Second operand 11 states. [2018-10-27 06:06:23,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:06:23,544 INFO L93 Difference]: Finished difference Result 229 states and 318 transitions. [2018-10-27 06:06:23,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 06:06:23,545 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 229 states and 318 transitions. [2018-10-27 06:06:23,548 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 32 [2018-10-27 06:06:23,550 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 229 states to 229 states and 318 transitions. [2018-10-27 06:06:23,550 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2018-10-27 06:06:23,551 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-10-27 06:06:23,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 229 states and 318 transitions. [2018-10-27 06:06:23,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:23,551 INFO L705 BuchiCegarLoop]: Abstraction has 229 states and 318 transitions. [2018-10-27 06:06:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states and 318 transitions. [2018-10-27 06:06:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 211. [2018-10-27 06:06:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-27 06:06:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 293 transitions. [2018-10-27 06:06:23,562 INFO L728 BuchiCegarLoop]: Abstraction has 211 states and 293 transitions. [2018-10-27 06:06:23,562 INFO L608 BuchiCegarLoop]: Abstraction has 211 states and 293 transitions. [2018-10-27 06:06:23,562 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-10-27 06:06:23,562 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 211 states and 293 transitions. [2018-10-27 06:06:23,565 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 32 [2018-10-27 06:06:23,566 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:23,566 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:23,567 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:23,567 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:23,567 INFO L793 eck$LassoCheckResult]: Stem: 3439#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3438#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 3395#L37 call main_#t~ret4 := fibo1(main_~x~0);< 3396#fibo1ENTRY ~n := #in~n; 3496#L8 assume !(~n < 1); 3497#L10 assume !(~n == 1); 3427#L13 call #t~ret0 := fibo2(~n - 1);< 3428#fibo2ENTRY ~n := #in~n; 3464#L18 assume !(~n < 1); 3465#L20 assume !(~n == 1); 3403#L23 call #t~ret2 := fibo1(~n - 1);< 3441#fibo1ENTRY ~n := #in~n; 3443#L8 assume !(~n < 1); 3401#L10 assume !(~n == 1); 3404#L13 call #t~ret0 := fibo2(~n - 1);< 3447#fibo2ENTRY ~n := #in~n; 3448#L18 assume !(~n < 1); 3540#L20 assume ~n == 1;#res := 1; 3407#fibo2FINAL assume true; 3408#fibo2EXIT >#50#return; 3392#L13-1 call #t~ret1 := fibo2(~n - 2);< 3434#fibo2ENTRY ~n := #in~n; 3514#L18 assume !(~n < 1); 3460#L20 assume !(~n == 1); 3391#L23 call #t~ret2 := fibo1(~n - 1);< 3394#fibo1ENTRY ~n := #in~n; 3455#L8 assume !(~n < 1); 3456#L10 assume !(~n == 1); 3393#L13 call #t~ret0 := fibo2(~n - 1);< 3486#fibo2ENTRY ~n := #in~n; 3503#L18 assume !(~n < 1); 3502#L20 assume !(~n == 1); 3391#L23 call #t~ret2 := fibo1(~n - 1);< 3394#fibo1ENTRY ~n := #in~n; 3442#L8 assume !(~n < 1); 3510#L10 assume ~n == 1;#res := 1; 3511#fibo1FINAL assume true; 3578#fibo1EXIT >#46#return; 3494#L23-1 call #t~ret3 := fibo1(~n - 2);< 3576#fibo1ENTRY ~n := #in~n; 3593#L8 assume ~n < 1;#res := 0; 3582#fibo1FINAL assume true; 3574#fibo1EXIT >#48#return; 3572#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 3569#fibo2FINAL assume true; 3549#fibo2EXIT >#50#return; 3516#L13-1 [2018-10-27 06:06:23,567 INFO L795 eck$LassoCheckResult]: Loop: 3516#L13-1 call #t~ret1 := fibo2(~n - 2);< 3546#fibo2ENTRY ~n := #in~n; 3544#L18 assume !(~n < 1); 3541#L20 assume !(~n == 1); 3530#L23 call #t~ret2 := fibo1(~n - 1);< 3538#fibo1ENTRY ~n := #in~n; 3555#L8 assume !(~n < 1); 3547#L10 assume !(~n == 1); 3537#L13 call #t~ret0 := fibo2(~n - 1);< 3546#fibo2ENTRY ~n := #in~n; 3544#L18 assume !(~n < 1); 3541#L20 assume !(~n == 1); 3530#L23 call #t~ret2 := fibo1(~n - 1);< 3538#fibo1ENTRY ~n := #in~n; 3555#L8 assume !(~n < 1); 3547#L10 assume ~n == 1;#res := 1; 3548#fibo1FINAL assume true; 3561#fibo1EXIT >#46#return; 3531#L23-1 call #t~ret3 := fibo1(~n - 2);< 3538#fibo1ENTRY ~n := #in~n; 3555#L8 assume ~n < 1;#res := 0; 3556#fibo1FINAL assume true; 3559#fibo1EXIT >#48#return; 3560#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 3564#fibo2FINAL assume true; 3552#fibo2EXIT >#50#return; 3516#L13-1 [2018-10-27 06:06:23,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:23,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1519288695, now seen corresponding path program 2 times [2018-10-27 06:06:23,567 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:23,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:23,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:23,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:23,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-27 06:06:23,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:23,799 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:06:23,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-27 06:06:23,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-27 06:06:23,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 06:06:23,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-10-27 06:06:24,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:06:24,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-10-27 06:06:24,039 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:06:24,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:24,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1626884941, now seen corresponding path program 1 times [2018-10-27 06:06:24,039 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:24,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:24,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:24,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:06:24,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:24,167 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-10-27 06:06:24,351 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:24,351 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:24,351 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:24,351 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:24,351 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:06:24,351 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:24,351 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:24,351 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:24,351 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration7_Loop [2018-10-27 06:06:24,352 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:24,352 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:24,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,361 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,367 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,397 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:24,397 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/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 [2018-10-27 06:06:24,403 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:24,403 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:24,419 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:24,420 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret0=1} Honda state: {fibo1_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:24,423 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:24,423 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:24,425 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:24,425 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:24,441 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:24,442 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:24,444 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:24,444 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:24,462 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:24,462 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:24,467 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:24,467 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:24,484 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:24,484 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:24,504 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:06:24,504 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:24,989 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:06:24,990 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:24,990 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:24,990 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:24,990 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:24,990 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:06:24,990 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:24,990 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:24,990 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:24,991 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration7_Loop [2018-10-27 06:06:24,991 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:24,991 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:24,991 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,994 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:24,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:25,001 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:25,002 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:25,010 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:25,011 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:25,012 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:25,013 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:25,240 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:25,240 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:06:25,240 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:25,241 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:25,241 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:25,241 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:25,241 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:25,241 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:25,241 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:25,242 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:25,242 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:25,243 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:25,243 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:25,243 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:25,243 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:25,243 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:25,243 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:25,244 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:25,244 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:25,244 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:25,244 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:25,245 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:25,245 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:25,245 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:25,245 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:25,245 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:25,245 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:25,245 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:25,246 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:25,255 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:25,255 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:25,255 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:25,256 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:25,256 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:25,256 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:25,256 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:25,256 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:25,257 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:25,257 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:25,257 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:25,257 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:25,257 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:25,257 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:25,258 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:25,258 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:25,258 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:25,264 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:06:25,266 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:06:25,266 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:06:25,266 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:06:25,266 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:06:25,266 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:06:25,266 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2018-10-27 06:06:25,267 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:06:25,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:25,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:25,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-27 06:06:25,492 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2018-10-27 06:06:25,493 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 211 states and 293 transitions. cyclomatic complexity: 89 Second operand 10 states. [2018-10-27 06:06:25,764 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 211 states and 293 transitions. cyclomatic complexity: 89. Second operand 10 states. Result 1106 states and 1518 transitions. Complement of second has 40 states. [2018-10-27 06:06:25,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-27 06:06:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 70 transitions. [2018-10-27 06:06:25,772 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 70 transitions. Stem has 46 letters. Loop has 26 letters. [2018-10-27 06:06:25,772 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:25,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 70 transitions. Stem has 72 letters. Loop has 26 letters. [2018-10-27 06:06:25,773 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:25,773 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 70 transitions. Stem has 46 letters. Loop has 52 letters. [2018-10-27 06:06:25,774 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:25,774 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1106 states and 1518 transitions. [2018-10-27 06:06:25,789 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 73 [2018-10-27 06:06:25,800 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1106 states to 890 states and 1248 transitions. [2018-10-27 06:06:25,800 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 431 [2018-10-27 06:06:25,800 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 442 [2018-10-27 06:06:25,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 890 states and 1248 transitions. [2018-10-27 06:06:25,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:25,801 INFO L705 BuchiCegarLoop]: Abstraction has 890 states and 1248 transitions. [2018-10-27 06:06:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states and 1248 transitions. [2018-10-27 06:06:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 830. [2018-10-27 06:06:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-10-27 06:06:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1162 transitions. [2018-10-27 06:06:25,833 INFO L728 BuchiCegarLoop]: Abstraction has 830 states and 1162 transitions. [2018-10-27 06:06:25,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 06:06:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:06:25,834 INFO L87 Difference]: Start difference. First operand 830 states and 1162 transitions. Second operand 14 states. [2018-10-27 06:06:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:06:26,141 INFO L93 Difference]: Finished difference Result 823 states and 1146 transitions. [2018-10-27 06:06:26,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 06:06:26,143 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 823 states and 1146 transitions. [2018-10-27 06:06:26,152 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 73 [2018-10-27 06:06:26,163 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 823 states to 793 states and 1106 transitions. [2018-10-27 06:06:26,163 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 409 [2018-10-27 06:06:26,164 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 409 [2018-10-27 06:06:26,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 793 states and 1106 transitions. [2018-10-27 06:06:26,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:26,168 INFO L705 BuchiCegarLoop]: Abstraction has 793 states and 1106 transitions. [2018-10-27 06:06:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states and 1106 transitions. [2018-10-27 06:06:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 728. [2018-10-27 06:06:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 728 states. [2018-10-27 06:06:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1025 transitions. [2018-10-27 06:06:26,198 INFO L728 BuchiCegarLoop]: Abstraction has 728 states and 1025 transitions. [2018-10-27 06:06:26,198 INFO L608 BuchiCegarLoop]: Abstraction has 728 states and 1025 transitions. [2018-10-27 06:06:26,198 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-10-27 06:06:26,198 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 728 states and 1025 transitions. [2018-10-27 06:06:26,202 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 73 [2018-10-27 06:06:26,202 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:26,202 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:26,205 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:26,206 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:26,206 INFO L793 eck$LassoCheckResult]: Stem: 6893#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6889#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 6840#L37 call main_#t~ret4 := fibo1(main_~x~0);< 6841#fibo1ENTRY ~n := #in~n; 6962#L8 assume !(~n < 1); 6961#L10 assume !(~n == 1); 6957#L13 call #t~ret0 := fibo2(~n - 1);< 6960#fibo2ENTRY ~n := #in~n; 6959#L18 assume !(~n < 1); 6958#L20 assume !(~n == 1); 6935#L23 call #t~ret2 := fibo1(~n - 1);< 6956#fibo1ENTRY ~n := #in~n; 6954#L8 assume !(~n < 1); 6955#L10 assume !(~n == 1); 6924#L13 call #t~ret0 := fibo2(~n - 1);< 6934#fibo2ENTRY ~n := #in~n; 6933#L18 assume !(~n < 1); 6932#L20 assume !(~n == 1); 6930#L23 call #t~ret2 := fibo1(~n - 1);< 6931#fibo1ENTRY ~n := #in~n; 6942#L8 assume !(~n < 1); 6938#L10 assume ~n == 1;#res := 1; 6936#fibo1FINAL assume true; 6929#fibo1EXIT >#46#return; 6916#L23-1 call #t~ret3 := fibo1(~n - 2);< 6920#fibo1ENTRY ~n := #in~n; 6921#L8 assume !(~n < 1); 6915#L10 assume !(~n == 1); 6830#L13 call #t~ret0 := fibo2(~n - 1);< 6911#fibo2ENTRY ~n := #in~n; 6910#L18 assume !(~n < 1); 6907#L20 assume !(~n == 1); 6908#L23 call #t~ret2 := fibo1(~n - 1);< 7179#fibo1ENTRY ~n := #in~n; 7180#L8 assume !(~n < 1); 7173#L10 assume !(~n == 1); 7175#L13 call #t~ret0 := fibo2(~n - 1);< 7189#fibo2ENTRY [2018-10-27 06:06:26,206 INFO L795 eck$LassoCheckResult]: Loop: 7189#fibo2ENTRY ~n := #in~n; 7188#L18 assume !(~n < 1); 7186#L20 assume !(~n == 1); 6885#L23 call #t~ret2 := fibo1(~n - 1);< 7182#fibo1ENTRY ~n := #in~n; 7176#L8 assume !(~n < 1); 7178#L10 assume !(~n == 1); 7181#L13 call #t~ret0 := fibo2(~n - 1);< 7189#fibo2ENTRY [2018-10-27 06:06:26,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:26,206 INFO L82 PathProgramCache]: Analyzing trace with hash 11031926, now seen corresponding path program 1 times [2018-10-27 06:06:26,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:26,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:26,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:26,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:26,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 06:06:26,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:26,360 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:06:26,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:26,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-27 06:06:26,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:06:26,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-10-27 06:06:26,485 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:06:26,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 2 times [2018-10-27 06:06:26,485 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:26,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:26,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:26,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:26,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:26,537 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:26,537 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:26,537 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:26,537 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:26,537 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:06:26,538 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,538 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:26,538 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:26,538 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration8_Loop [2018-10-27 06:06:26,538 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:26,538 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:26,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,607 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,611 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,643 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:26,644 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,647 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,647 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,649 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:26,649 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret1=0} Honda state: {fibo1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,666 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,666 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,667 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:26,668 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 34 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,685 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,685 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,687 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:26,687 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 35 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,704 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,704 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,711 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:26,711 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 36 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,727 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,728 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,730 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:26,731 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 37 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,747 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,747 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,751 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:26,751 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 38 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,768 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,768 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,770 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:26,770 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret0=0} Honda state: {fibo1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,793 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,793 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,795 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:26,795 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,812 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,812 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,814 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:26,814 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret3=0} Honda state: {fibo2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,831 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:26,831 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 42 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,850 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:06:26,850 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:26,896 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:06:26,897 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:26,897 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:26,897 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:26,897 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:26,897 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:06:26,897 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:26,897 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:26,898 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:26,898 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration8_Loop [2018-10-27 06:06:26,898 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:26,898 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:26,898 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,903 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,911 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,918 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:26,944 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:26,944 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:06:26,945 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:26,945 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:26,945 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:26,945 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:26,945 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:26,945 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:26,946 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:26,946 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:26,946 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:26,946 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:26,947 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:26,947 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:26,947 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:26,947 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:26,947 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:26,947 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:26,948 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:26,948 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:26,948 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:26,948 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:26,949 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:26,949 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:26,949 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:26,949 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:26,949 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:26,949 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:26,950 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:26,950 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:26,950 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:26,950 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:26,950 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:26,950 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:26,950 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:26,954 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:26,954 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:26,955 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:26,955 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:26,955 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:26,955 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:26,956 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:26,956 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:26,956 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:26,956 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:26,956 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:26,956 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:26,957 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:26,957 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:26,957 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:26,957 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:26,957 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:26,957 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:26,958 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:26,958 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:26,960 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:26,960 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:26,961 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:26,961 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:26,961 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:26,961 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:26,961 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:26,961 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:26,961 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:26,962 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:26,962 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:26,962 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:26,963 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:26,963 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:26,963 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:26,963 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:26,963 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:26,963 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:26,964 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:26,964 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:26,964 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:26,964 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:26,964 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:26,964 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:26,965 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:26,965 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:26,965 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:26,966 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:06:26,972 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:06:26,972 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:06:26,972 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:06:26,972 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:06:26,972 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:06:26,972 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2018-10-27 06:06:26,973 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:06:27,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:27,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:27,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:27,196 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:06:27,196 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 728 states and 1025 transitions. cyclomatic complexity: 318 Second operand 7 states. [2018-10-27 06:06:27,328 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 728 states and 1025 transitions. cyclomatic complexity: 318. Second operand 7 states. Result 852 states and 1156 transitions. Complement of second has 23 states. [2018-10-27 06:06:27,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:06:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2018-10-27 06:06:27,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 37 letters. Loop has 8 letters. [2018-10-27 06:06:27,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:27,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 45 letters. Loop has 8 letters. [2018-10-27 06:06:27,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:27,335 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 37 letters. Loop has 16 letters. [2018-10-27 06:06:27,335 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:27,335 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 852 states and 1156 transitions. [2018-10-27 06:06:27,344 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 64 [2018-10-27 06:06:27,352 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 852 states to 776 states and 1074 transitions. [2018-10-27 06:06:27,352 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 377 [2018-10-27 06:06:27,353 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 387 [2018-10-27 06:06:27,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 776 states and 1074 transitions. [2018-10-27 06:06:27,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:27,353 INFO L705 BuchiCegarLoop]: Abstraction has 776 states and 1074 transitions. [2018-10-27 06:06:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states and 1074 transitions. [2018-10-27 06:06:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 767. [2018-10-27 06:06:27,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-10-27 06:06:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1065 transitions. [2018-10-27 06:06:27,378 INFO L728 BuchiCegarLoop]: Abstraction has 767 states and 1065 transitions. [2018-10-27 06:06:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-27 06:06:27,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2018-10-27 06:06:27,379 INFO L87 Difference]: Start difference. First operand 767 states and 1065 transitions. Second operand 24 states. [2018-10-27 06:06:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:06:28,117 INFO L93 Difference]: Finished difference Result 309 states and 410 transitions. [2018-10-27 06:06:28,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-27 06:06:28,117 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 309 states and 410 transitions. [2018-10-27 06:06:28,119 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 27 [2018-10-27 06:06:28,123 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 309 states to 291 states and 387 transitions. [2018-10-27 06:06:28,123 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 210 [2018-10-27 06:06:28,124 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 211 [2018-10-27 06:06:28,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 291 states and 387 transitions. [2018-10-27 06:06:28,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:28,124 INFO L705 BuchiCegarLoop]: Abstraction has 291 states and 387 transitions. [2018-10-27 06:06:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states and 387 transitions. [2018-10-27 06:06:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 263. [2018-10-27 06:06:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-27 06:06:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 349 transitions. [2018-10-27 06:06:28,135 INFO L728 BuchiCegarLoop]: Abstraction has 263 states and 349 transitions. [2018-10-27 06:06:28,135 INFO L608 BuchiCegarLoop]: Abstraction has 263 states and 349 transitions. [2018-10-27 06:06:28,135 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-10-27 06:06:28,135 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 263 states and 349 transitions. [2018-10-27 06:06:28,136 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 27 [2018-10-27 06:06:28,136 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:28,137 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:28,137 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:28,137 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:28,137 INFO L793 eck$LassoCheckResult]: Stem: 9869#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 9864#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 9843#L37 call main_#t~ret4 := fibo1(main_~x~0);< 9844#fibo1ENTRY ~n := #in~n; 9873#L8 assume !(~n < 1); 9842#L10 assume !(~n == 1); 9823#L13 call #t~ret0 := fibo2(~n - 1);< 9856#fibo2ENTRY ~n := #in~n; 9871#L18 assume !(~n < 1); 9877#L20 assume !(~n == 1); 9822#L23 call #t~ret2 := fibo1(~n - 1);< 9824#fibo1ENTRY ~n := #in~n; 9929#L8 assume !(~n < 1); 9927#L10 assume !(~n == 1); 9914#L13 call #t~ret0 := fibo2(~n - 1);< 9925#fibo2ENTRY ~n := #in~n; 9923#L18 assume !(~n < 1); 9921#L20 assume !(~n == 1); 9896#L23 call #t~ret2 := fibo1(~n - 1);< 9909#fibo1ENTRY ~n := #in~n; 9910#L8 assume !(~n < 1); 10042#L10 assume !(~n == 1); 10040#L13 call #t~ret0 := fibo2(~n - 1);< 10041#fibo2ENTRY ~n := #in~n; 10049#L18 assume !(~n < 1); 10048#L20 assume ~n == 1;#res := 1; 10045#fibo2FINAL assume true; 10039#fibo2EXIT >#50#return; 10036#L13-1 call #t~ret1 := fibo2(~n - 2);< 10037#fibo2ENTRY ~n := #in~n; 10051#L18 assume ~n < 1;#res := 0; 10050#fibo2FINAL assume true; 10035#fibo2EXIT >#52#return; 10032#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 10028#fibo1FINAL assume true; 10026#fibo1EXIT >#46#return; 10023#L23-1 call #t~ret3 := fibo1(~n - 2);< 10025#fibo1ENTRY ~n := #in~n; 10038#L8 assume !(~n < 1); 10033#L10 assume ~n == 1;#res := 1; 10029#fibo1FINAL assume true; 10022#fibo1EXIT >#48#return; 9992#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 10058#fibo2FINAL assume true; 9970#fibo2EXIT >#50#return; 9964#L13-1 call #t~ret1 := fibo2(~n - 2);< 9968#fibo2ENTRY [2018-10-27 06:06:28,137 INFO L795 eck$LassoCheckResult]: Loop: 9968#fibo2ENTRY ~n := #in~n; 9996#L18 assume !(~n < 1); 9994#L20 assume !(~n == 1); 9951#L23 call #t~ret2 := fibo1(~n - 1);< 9958#fibo1ENTRY ~n := #in~n; 9978#L8 assume !(~n < 1); 9975#L10 assume !(~n == 1); 9965#L13 call #t~ret0 := fibo2(~n - 1);< 9968#fibo2ENTRY [2018-10-27 06:06:28,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash -177678082, now seen corresponding path program 3 times [2018-10-27 06:06:28,138 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:28,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:28,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:28,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:06:28,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:28,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:28,157 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 3 times [2018-10-27 06:06:28,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:28,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:28,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:28,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:06:28,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:28,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:28,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1358906085, now seen corresponding path program 4 times [2018-10-27 06:06:28,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:28,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:28,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:28,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:06:28,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-27 06:06:28,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:06:28,316 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:06:28,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 06:06:28,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 06:06:28,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 06:06:28,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-27 06:06:28,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:06:28,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-27 06:06:28,419 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:28,419 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:28,419 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:28,419 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:28,419 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:06:28,419 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:28,419 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:28,419 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:28,419 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration9_Loop [2018-10-27 06:06:28,419 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:28,420 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:28,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,438 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,486 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:28,486 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 44 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:28,489 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:28,489 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:28,495 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:28,495 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret3=0} Honda state: {fibo2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:28,512 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:28,512 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:28,515 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:28,515 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:28,532 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:28,532 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:28,534 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:28,534 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 47 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:28,560 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:28,560 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:28,562 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:28,562 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret0=0} Honda state: {fibo1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 48 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:28,582 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:28,582 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:28,584 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:28,584 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:28,601 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:28,601 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 50 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:28,620 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:06:28,620 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:28,665 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:06:28,666 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:28,666 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:28,666 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:28,666 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:28,666 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:06:28,666 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:28,667 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:28,667 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:28,667 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration9_Loop [2018-10-27 06:06:28,667 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:28,667 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:28,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:28,758 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:28,758 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:06:28,758 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:28,759 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:28,759 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:28,759 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:28,759 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:28,759 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:28,759 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:28,759 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:28,760 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:28,760 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:28,761 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:28,761 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:28,761 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:28,761 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:28,761 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:28,761 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:28,761 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:28,762 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:28,762 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:28,762 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:28,762 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:28,762 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:28,764 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:28,764 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:28,764 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:28,764 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:28,765 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:28,765 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:28,765 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:28,766 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:28,766 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:28,766 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:28,766 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:28,766 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:28,766 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:28,767 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:28,767 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:28,767 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:28,767 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:28,767 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:28,767 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:28,768 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:28,768 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:28,768 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:28,768 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:28,769 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:28,769 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:28,769 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:28,769 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:28,769 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:28,769 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:28,769 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:28,770 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:28,770 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:28,770 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:28,770 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:28,771 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:28,774 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:28,774 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:28,774 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:28,774 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:28,774 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:28,775 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:28,775 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:28,776 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:28,776 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:28,776 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:28,776 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:28,776 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:28,776 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:28,776 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:28,777 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:06:28,778 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:06:28,795 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:06:28,795 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:06:28,795 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:06:28,795 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:06:28,795 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2018-10-27 06:06:28,796 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:06:28,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:28,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:28,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:28,966 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:06:28,966 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92 Second operand 7 states. [2018-10-27 06:06:29,221 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92. Second operand 7 states. Result 423 states and 540 transitions. Complement of second has 26 states. [2018-10-27 06:06:29,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:06:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2018-10-27 06:06:29,223 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 46 letters. Loop has 8 letters. [2018-10-27 06:06:29,223 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:29,223 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:06:29,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:29,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:29,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:29,445 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:06:29,445 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92 Second operand 7 states. [2018-10-27 06:06:29,555 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92. Second operand 7 states. Result 423 states and 540 transitions. Complement of second has 26 states. [2018-10-27 06:06:29,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:06:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2018-10-27 06:06:29,556 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 46 letters. Loop has 8 letters. [2018-10-27 06:06:29,556 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:29,556 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:06:29,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:29,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:29,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:29,656 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:06:29,656 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92 Second operand 7 states. [2018-10-27 06:06:29,766 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92. Second operand 7 states. Result 495 states and 641 transitions. Complement of second has 25 states. [2018-10-27 06:06:29,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:06:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2018-10-27 06:06:29,768 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 46 letters. Loop has 8 letters. [2018-10-27 06:06:29,769 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:29,769 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 54 letters. Loop has 8 letters. [2018-10-27 06:06:29,769 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:29,769 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 46 letters. Loop has 16 letters. [2018-10-27 06:06:29,770 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:29,770 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 641 transitions. [2018-10-27 06:06:29,773 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 55 [2018-10-27 06:06:29,777 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 380 states and 503 transitions. [2018-10-27 06:06:29,777 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 223 [2018-10-27 06:06:29,778 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-10-27 06:06:29,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 380 states and 503 transitions. [2018-10-27 06:06:29,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:29,778 INFO L705 BuchiCegarLoop]: Abstraction has 380 states and 503 transitions. [2018-10-27 06:06:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states and 503 transitions. [2018-10-27 06:06:29,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 353. [2018-10-27 06:06:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2018-10-27 06:06:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 455 transitions. [2018-10-27 06:06:29,794 INFO L728 BuchiCegarLoop]: Abstraction has 353 states and 455 transitions. [2018-10-27 06:06:29,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-27 06:06:29,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-10-27 06:06:29,795 INFO L87 Difference]: Start difference. First operand 353 states and 455 transitions. Second operand 14 states. [2018-10-27 06:06:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:06:30,430 INFO L93 Difference]: Finished difference Result 243 states and 301 transitions. [2018-10-27 06:06:30,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-27 06:06:30,435 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 243 states and 301 transitions. [2018-10-27 06:06:30,437 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-10-27 06:06:30,438 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 243 states to 208 states and 253 transitions. [2018-10-27 06:06:30,439 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2018-10-27 06:06:30,439 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 174 [2018-10-27 06:06:30,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 208 states and 253 transitions. [2018-10-27 06:06:30,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:06:30,439 INFO L705 BuchiCegarLoop]: Abstraction has 208 states and 253 transitions. [2018-10-27 06:06:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states and 253 transitions. [2018-10-27 06:06:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2018-10-27 06:06:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-27 06:06:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2018-10-27 06:06:30,448 INFO L728 BuchiCegarLoop]: Abstraction has 192 states and 230 transitions. [2018-10-27 06:06:30,448 INFO L608 BuchiCegarLoop]: Abstraction has 192 states and 230 transitions. [2018-10-27 06:06:30,448 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-10-27 06:06:30,448 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 192 states and 230 transitions. [2018-10-27 06:06:30,449 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-10-27 06:06:30,449 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:06:30,450 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:06:30,450 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:30,450 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:06:30,456 INFO L793 eck$LassoCheckResult]: Stem: 12868#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 12867#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 12842#L37 call main_#t~ret4 := fibo1(main_~x~0);< 12843#fibo1ENTRY ~n := #in~n; 12909#L8 assume !(~n < 1); 12910#L10 assume !(~n == 1); 12856#L13 call #t~ret0 := fibo2(~n - 1);< 12857#fibo2ENTRY ~n := #in~n; 12913#L18 assume !(~n < 1); 12912#L20 assume !(~n == 1); 12847#L23 call #t~ret2 := fibo1(~n - 1);< 12870#fibo1ENTRY ~n := #in~n; 12871#L8 assume !(~n < 1); 12846#L10 assume !(~n == 1); 12848#L13 call #t~ret0 := fibo2(~n - 1);< 12902#fibo2ENTRY ~n := #in~n; 12899#L18 assume !(~n < 1); 12900#L20 assume !(~n == 1); 12854#L23 call #t~ret2 := fibo1(~n - 1);< 12887#fibo1ENTRY ~n := #in~n; 12889#L8 assume !(~n < 1); 12907#L10 assume !(~n == 1); 12852#L13 call #t~ret0 := fibo2(~n - 1);< 12855#fibo2ENTRY ~n := #in~n; 12993#L18 assume !(~n < 1); 12991#L20 assume ~n == 1;#res := 1; 12990#fibo2FINAL assume true; 12989#fibo2EXIT >#50#return; 12858#L13-1 call #t~ret1 := fibo2(~n - 2);< 12859#fibo2ENTRY ~n := #in~n; 13003#L18 assume ~n < 1;#res := 0; 13001#fibo2FINAL assume true; 13000#fibo2EXIT >#52#return; 12998#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 12997#fibo1FINAL assume true; 12996#fibo1EXIT >#46#return; 12931#L23-1 call #t~ret3 := fibo1(~n - 2);< 12934#fibo1ENTRY ~n := #in~n; 13007#L8 assume !(~n < 1); 13006#L10 assume ~n == 1;#res := 1; 12994#fibo1FINAL assume true; 12930#fibo1EXIT >#48#return; 12929#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 12927#fibo2FINAL assume true; 12926#fibo2EXIT >#50#return; 12831#L13-1 call #t~ret1 := fibo2(~n - 2);< 12925#fibo2ENTRY ~n := #in~n; 13004#L18 assume !(~n < 1); 13002#L20 assume !(~n == 1); 12830#L23 call #t~ret2 := fibo1(~n - 1);< 12833#fibo1ENTRY ~n := #in~n; 12869#L8 assume !(~n < 1); 12844#L10 assume ~n == 1;#res := 1; 12845#fibo1FINAL assume true; 12860#fibo1EXIT >#46#return; 12838#L23-1 call #t~ret3 := fibo1(~n - 2);< 12839#fibo1ENTRY ~n := #in~n; 13020#L8 assume ~n < 1;#res := 0; 13017#fibo1FINAL assume true; 12851#fibo1EXIT >#48#return; 12849#L23-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 12850#fibo2FINAL assume true; 12924#fibo2EXIT >#52#return; 12923#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 12922#fibo1FINAL assume true; 12921#fibo1EXIT >#46#return; 12865#L23-1 call #t~ret3 := fibo1(~n - 2);< 12890#fibo1ENTRY [2018-10-27 06:06:30,456 INFO L795 eck$LassoCheckResult]: Loop: 12890#fibo1ENTRY ~n := #in~n; 12891#L8 assume !(~n < 1); 12879#L10 assume !(~n == 1); 12881#L13 call #t~ret0 := fibo2(~n - 1);< 12903#fibo2ENTRY ~n := #in~n; 12904#L18 assume !(~n < 1); 12959#L20 assume !(~n == 1); 12864#L23 call #t~ret2 := fibo1(~n - 1);< 12890#fibo1ENTRY [2018-10-27 06:06:30,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:30,457 INFO L82 PathProgramCache]: Analyzing trace with hash 944778444, now seen corresponding path program 1 times [2018-10-27 06:06:30,457 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:30,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:30,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:06:30,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:30,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:30,477 INFO L82 PathProgramCache]: Analyzing trace with hash 181289832, now seen corresponding path program 4 times [2018-10-27 06:06:30,477 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:30,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:30,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:30,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:06:30,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:30,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:30,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1215722803, now seen corresponding path program 2 times [2018-10-27 06:06:30,484 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:06:30,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:06:30,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:30,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:06:30,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:06:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:06:30,664 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:30,664 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:30,664 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:30,664 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:30,664 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:06:30,664 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:30,664 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:30,664 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:30,664 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration10_Loop [2018-10-27 06:06:30,665 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:30,665 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:30,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,723 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:30,724 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 51 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:30,729 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:30,729 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:30,731 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:30,731 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret1=0} Honda state: {fibo1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 52 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:30,748 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:30,748 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:30,750 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:30,750 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret2=0} Honda state: {fibo2_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 53 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:30,768 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:30,768 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:30,770 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:30,770 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 54 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:30,788 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:30,788 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:30,795 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:30,795 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:30,813 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:30,813 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:30,815 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:06:30,815 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 56 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:30,832 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:06:30,832 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3de6d0b2-f350-45dc-84ba-8281d14a2c6c/bin-2019/uautomizer/z3 Starting monitored process 57 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:30,852 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:06:30,852 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:06:30,919 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:06:30,920 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:06:30,920 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:06:30,920 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:06:30,920 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:06:30,920 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:06:30,920 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:06:30,920 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:06:30,921 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:06:30,921 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration10_Loop [2018-10-27 06:06:30,921 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:06:30,921 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:06:30,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,935 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:06:30,975 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:06:30,975 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:06:30,975 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:30,976 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:30,976 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:30,976 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:30,976 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:30,976 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:30,976 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:30,976 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:30,977 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:30,977 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:30,977 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:30,977 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:30,977 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:30,978 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:30,978 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:30,978 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:30,978 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:30,978 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:30,991 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:30,991 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:30,991 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:30,991 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:30,991 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:30,992 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:30,992 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:30,992 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:30,992 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:30,993 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:30,993 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:30,993 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:30,993 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:30,993 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:30,993 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:30,993 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:30,994 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:30,994 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:30,994 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:30,994 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:30,995 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:30,995 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:30,995 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:30,995 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:30,995 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:30,995 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:30,996 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:06:30,996 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:06:30,996 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:06:30,996 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:06:30,996 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:06:30,996 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:06:30,996 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:06:30,997 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:06:30,997 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:06:30,998 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:06:30,999 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:06:30,999 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:06:30,999 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:06:30,999 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:06:30,999 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:06:30,999 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2018-10-27 06:06:30,999 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:06:31,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:31,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:31,707 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-10-27 06:06:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:31,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:31,781 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:06:31,781 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42 Second operand 7 states. [2018-10-27 06:06:31,823 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42. Second operand 7 states. Result 200 states and 239 transitions. Complement of second has 7 states. [2018-10-27 06:06:31,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:06:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2018-10-27 06:06:31,825 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 67 letters. Loop has 8 letters. [2018-10-27 06:06:31,825 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:31,825 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:06:31,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:31,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:31,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:31,954 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:06:31,954 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42 Second operand 7 states. [2018-10-27 06:06:31,996 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42. Second operand 7 states. Result 200 states and 239 transitions. Complement of second has 7 states. [2018-10-27 06:06:31,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:06:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2018-10-27 06:06:31,997 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 67 letters. Loop has 8 letters. [2018-10-27 06:06:31,997 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:31,997 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:06:32,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:06:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:32,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:06:32,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:06:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:06:32,267 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:06:32,267 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42 Second operand 7 states. [2018-10-27 06:06:32,382 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42. Second operand 7 states. Result 266 states and 322 transitions. Complement of second has 23 states. [2018-10-27 06:06:32,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2018-10-27 06:06:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:06:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2018-10-27 06:06:32,387 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 67 letters. Loop has 8 letters. [2018-10-27 06:06:32,388 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:32,388 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 75 letters. Loop has 8 letters. [2018-10-27 06:06:32,388 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:32,388 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 67 letters. Loop has 16 letters. [2018-10-27 06:06:32,389 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:06:32,389 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 266 states and 322 transitions. [2018-10-27 06:06:32,390 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:06:32,390 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 266 states to 0 states and 0 transitions. [2018-10-27 06:06:32,396 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-10-27 06:06:32,396 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-10-27 06:06:32,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-10-27 06:06:32,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-10-27 06:06:32,397 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:06:32,397 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:06:32,397 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:06:32,397 INFO L442 BuchiCegarLoop]: ======== Iteration 11============ [2018-10-27 06:06:32,397 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-10-27 06:06:32,397 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:06:32,397 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-10-27 06:06:32,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.10 06:06:32 BoogieIcfgContainer [2018-10-27 06:06:32,406 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-10-27 06:06:32,406 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 06:06:32,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 06:06:32,409 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 06:06:32,409 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:06:15" (3/4) ... [2018-10-27 06:06:32,412 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-27 06:06:32,412 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 06:06:32,413 INFO L168 Benchmark]: Toolchain (without parser) took 17150.30 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 241.7 MB). Free memory was 960.7 MB in the beginning and 1.1 GB in the end (delta: -187.2 MB). Peak memory consumption was 54.4 MB. Max. memory is 11.5 GB. [2018-10-27 06:06:32,414 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:06:32,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.71 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 06:06:32,414 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.93 ms. Allocated memory is still 1.0 GB. Free memory is still 950.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:06:32,414 INFO L168 Benchmark]: Boogie Preprocessor took 11.29 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 06:06:32,415 INFO L168 Benchmark]: RCFGBuilder took 419.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -199.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2018-10-27 06:06:32,415 INFO L168 Benchmark]: BuchiAutomizer took 16515.21 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 85.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.5 MB). Peak memory consumption was 83.9 MB. Max. memory is 11.5 GB. [2018-10-27 06:06:32,416 INFO L168 Benchmark]: Witness Printer took 5.82 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:06:32,418 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 171.71 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 950.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.93 ms. Allocated memory is still 1.0 GB. Free memory is still 950.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.29 ms. Allocated memory is still 1.0 GB. Free memory was 950.0 MB in the beginning and 947.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 419.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -199.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 16515.21 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 85.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.5 MB). Peak memory consumption was 83.9 MB. Max. memory is 11.5 GB. * Witness Printer took 5.82 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. 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 14 terminating modules (8 trivial, 4 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 9 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 16.4s and 11 iterations. TraceHistogramMax:8. Analysis of lassos took 8.8s. Construction of modules took 2.2s. Büchi inclusion checks took 4.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 13. Automata minimization 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 299 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 728 states and ocurred in iteration 7. Nontrivial modules had stage [4, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 4/16 HoareTripleCheckerStatistics: 398 SDtfs, 870 SDslu, 1056 SDs, 0 SdLazy, 2173 SolverSat, 436 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT1 SILN0 SILU0 SILI4 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq184 hnf93 smp76 dnf100 smp100 tf111 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 34 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...