./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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 0.1.23-5842f4b [2018-11-18 15:12:11,298 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:12:11,299 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:12:11,308 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:12:11,308 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:12:11,310 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:12:11,311 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:12:11,312 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:12:11,313 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:12:11,317 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:12:11,318 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:12:11,318 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:12:11,319 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:12:11,319 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:12:11,320 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:12:11,320 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:12:11,320 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:12:11,322 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:12:11,323 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:12:11,324 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:12:11,324 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:12:11,325 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:12:11,327 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:12:11,328 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:12:11,328 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:12:11,329 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:12:11,330 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:12:11,330 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:12:11,331 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:12:11,332 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:12:11,332 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:12:11,333 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:12:11,333 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:12:11,334 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:12:11,335 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:12:11,335 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:12:11,335 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-11-18 15:12:11,352 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:12:11,353 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:12:11,357 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 15:12:11,358 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 15:12:11,358 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 15:12:11,358 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-18 15:12:11,358 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-18 15:12:11,358 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-18 15:12:11,358 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-18 15:12:11,359 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-18 15:12:11,359 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-18 15:12:11,359 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:12:11,359 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:12:11,359 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 15:12:11,359 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:12:11,359 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:12:11,360 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:12:11,360 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-18 15:12:11,360 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-18 15:12:11,360 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-18 15:12:11,360 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:12:11,360 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:12:11,360 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-18 15:12:11,360 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:12:11,361 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-18 15:12:11,361 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:12:11,361 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:12:11,366 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-18 15:12:11,366 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:12:11,366 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 15:12:11,366 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-18 15:12:11,367 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-18 15:12:11,367 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:11,407 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:12:11,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:12:11,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:12:11,424 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:12:11,424 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:12:11,425 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_false-unreach-call_true-termination.c [2018-11-18 15:12:11,483 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/data/178be254d/cce13bbade584bb08c30997292a44af3/FLAG61dc1a0e1 [2018-11-18 15:12:11,935 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:12:11,938 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/sv-benchmarks/c/recursive-simple/fibo_2calls_6_false-unreach-call_true-termination.c [2018-11-18 15:12:11,944 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/data/178be254d/cce13bbade584bb08c30997292a44af3/FLAG61dc1a0e1 [2018-11-18 15:12:12,446 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/data/178be254d/cce13bbade584bb08c30997292a44af3 [2018-11-18 15:12:12,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:12:12,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:12:12,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:12:12,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:12:12,458 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:12:12,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@598d948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12, skipping insertion in model container [2018-11-18 15:12:12,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:12:12,496 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:12:12,688 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:12:12,700 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:12:12,723 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:12:12,743 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:12:12,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12 WrapperNode [2018-11-18 15:12:12,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:12:12,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 15:12:12,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 15:12:12,744 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 15:12:12,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 15:12:12,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:12:12,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:12:12,786 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:12:12,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... [2018-11-18 15:12:12,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:12:12,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:12:12,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:12:12,802 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:12:12,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:12:12,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:12:12,960 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-18 15:12:12,960 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-18 15:12:12,961 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-18 15:12:12,961 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-18 15:12:13,575 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:12:13,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:12:13 BoogieIcfgContainer [2018-11-18 15:12:13,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:12:13,576 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-18 15:12:13,576 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-18 15:12:13,579 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-18 15:12:13,580 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 15:12:13,580 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 03:12:12" (1/3) ... [2018-11-18 15:12:13,581 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b1918c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 03:12:13, skipping insertion in model container [2018-11-18 15:12:13,581 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 15:12:13,581 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:12:12" (2/3) ... [2018-11-18 15:12:13,582 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b1918c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 03:12:13, skipping insertion in model container [2018-11-18 15:12:13,582 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 15:12:13,582 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:12:13" (3/3) ... [2018-11-18 15:12:13,584 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_6_false-unreach-call_true-termination.c [2018-11-18 15:12:13,639 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 15:12:13,640 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-18 15:12:13,640 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-18 15:12:13,640 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-18 15:12:13,640 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:12:13,640 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:12:13,641 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-18 15:12:13,641 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:12:13,641 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-18 15:12:13,655 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states. [2018-11-18 15:12:13,701 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 15:12:13,702 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:13,702 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:13,709 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 15:12:13,709 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:13,709 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-18 15:12:13,717 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states. [2018-11-18 15:12:13,720 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 15:12:13,720 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:13,721 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:13,722 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 15:12:13,722 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:13,730 INFO L794 eck$LassoCheckResult]: Stem: 24#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 10#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 17#L37true call main_#t~ret4 := fibo1(main_~x~0);< 25#fibo1ENTRYtrue [2018-11-18 15:12:13,730 INFO L796 eck$LassoCheckResult]: Loop: 25#fibo1ENTRYtrue ~n := #in~n; 13#L8true assume !(~n < 1); 4#L10true assume !(1 == ~n); 19#L13true call #t~ret0 := fibo2(~n - 1);< 11#fibo2ENTRYtrue ~n := #in~n; 28#L18true assume !(~n < 1); 26#L20true assume !(1 == ~n); 3#L23true call #t~ret2 := fibo1(~n - 1);< 25#fibo1ENTRYtrue [2018-11-18 15:12:13,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:13,737 INFO L82 PathProgramCache]: Analyzing trace with hash 29896, now seen corresponding path program 1 times [2018-11-18 15:12:13,739 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:13,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:13,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:13,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:13,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:13,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:13,832 INFO L82 PathProgramCache]: Analyzing trace with hash 181289832, now seen corresponding path program 1 times [2018-11-18 15:12:13,832 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:13,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:13,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:13,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:13,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:13,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:13,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1313669423, now seen corresponding path program 1 times [2018-11-18 15:12:13,847 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:13,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:13,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:13,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:13,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:14,141 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:14,142 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:14,142 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:14,143 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:14,143 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 15:12:14,143 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:14,143 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:14,143 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:14,143 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-18 15:12:14,143 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:14,144 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:14,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,195 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:14,401 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:14,402 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-18 15:12:14,408 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:14,409 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:14,420 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:14,421 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:14,453 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:14,453 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:14,458 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:14,459 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:14,484 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:14,484 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:14,497 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:14,497 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:14,646 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:14,646 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:14,682 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:14,682 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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) [2018-11-18 15:12:14,882 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:14,882 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:14,908 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:14,909 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:14,937 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:14,938 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:14,942 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:14,942 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:14,962 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:14,962 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:14,976 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:14,976 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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) [2018-11-18 15:12:14,995 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:14,996 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 [2018-11-18 15:12:15,008 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:15,008 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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) [2018-11-18 15:12:15,035 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:15,035 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:15,042 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:15,042 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:15,063 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:15,063 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:15,089 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 15:12:15,089 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:15,139 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 15:12:15,141 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:15,141 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:15,141 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:15,141 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:15,141 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 15:12:15,142 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:15,142 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:15,142 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:15,142 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration1_Loop [2018-11-18 15:12:15,142 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:15,142 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:15,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:15,559 WARN L180 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-11-18 15:12:15,906 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-18 15:12:15,930 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:15,935 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 15:12:15,937 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:15,938 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:15,939 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:15,940 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:15,940 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:15,940 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:15,941 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:15,942 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:15,945 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:15,945 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 [2018-11-18 15:12:15,946 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:15,946 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:15,946 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:15,946 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:15,946 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:15,947 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:15,947 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:15,948 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:15,948 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 [2018-11-18 15:12:15,949 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:15,949 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:15,949 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:15,949 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:15,949 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:15,950 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:15,950 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:15,951 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:15,952 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:15,952 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:15,952 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:15,952 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:15,953 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:15,953 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:15,958 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:15,958 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:15,960 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:15,960 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 [2018-11-18 15:12:15,960 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:15,961 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:15,961 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:15,961 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:15,961 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:15,962 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:15,962 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:15,963 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:15,963 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:15,964 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:15,964 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:15,964 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:15,964 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:15,965 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:15,965 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:15,970 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:15,971 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:15,971 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:15,972 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:15,972 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:15,972 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:15,972 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:15,972 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:15,973 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:15,973 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:15,974 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:15,974 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:15,975 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:15,975 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:15,975 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:15,975 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:15,976 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:15,976 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:15,976 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:15,977 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:15,978 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:15,978 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:15,978 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:15,978 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:15,978 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:15,978 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:15,979 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:15,979 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:15,983 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 15:12:15,987 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 15:12:15,987 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 15:12:15,988 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 15:12:15,989 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 15:12:15,989 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 15:12:15,989 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2018-11-18 15:12:15,990 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 15:12:16,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:16,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:16,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:16,244 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 [2018-11-18 15:12:16,245 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 26 states. Second operand 6 states. [2018-11-18 15:12:16,541 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. [2018-11-18 15:12:16,543 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 [2018-11-18 15:12:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-18 15:12:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2018-11-18 15:12:16,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2018-11-18 15:12:16,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:16,549 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2018-11-18 15:12:16,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:16,549 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2018-11-18 15:12:16,550 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:16,551 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 84 states and 116 transitions. [2018-11-18 15:12:16,556 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 15:12:16,565 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 84 states to 61 states and 82 transitions. [2018-11-18 15:12:16,566 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2018-11-18 15:12:16,567 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2018-11-18 15:12:16,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2018-11-18 15:12:16,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:16,569 INFO L705 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2018-11-18 15:12:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2018-11-18 15:12:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2018-11-18 15:12:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-18 15:12:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2018-11-18 15:12:16,604 INFO L728 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2018-11-18 15:12:16,604 INFO L608 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2018-11-18 15:12:16,604 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-18 15:12:16,604 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2018-11-18 15:12:16,606 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 15:12:16,606 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:16,606 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:16,607 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:16,608 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:16,608 INFO L794 eck$LassoCheckResult]: Stem: 231#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 227#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 214#L37 call main_#t~ret4 := fibo1(main_~x~0);< 216#fibo1ENTRY ~n := #in~n; 228#L8 assume !(~n < 1); 213#L10 assume !(1 == ~n); 205#L13 call #t~ret0 := fibo2(~n - 1);< 221#fibo2ENTRY ~n := #in~n; 248#L18 assume !(~n < 1); 249#L20 assume !(1 == ~n); 200#L23 call #t~ret2 := fibo1(~n - 1);< 203#fibo1ENTRY ~n := #in~n; 229#L8 assume ~n < 1;#res := 0; 212#fibo1FINAL assume true; 219#fibo1EXIT >#46#return; 215#L23-1 [2018-11-18 15:12:16,608 INFO L796 eck$LassoCheckResult]: Loop: 215#L23-1 call #t~ret3 := fibo1(~n - 2);< 199#fibo1ENTRY ~n := #in~n; 244#L8 assume !(~n < 1); 242#L10 assume !(1 == ~n); 198#L13 call #t~ret0 := fibo2(~n - 1);< 222#fibo2ENTRY ~n := #in~n; 241#L18 assume !(~n < 1); 237#L20 assume !(1 == ~n); 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 [2018-11-18 15:12:16,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1888024054, now seen corresponding path program 1 times [2018-11-18 15:12:16,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:16,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:16,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:16,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:16,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 15:12:16,778 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:12:16,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:12:16,780 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 15:12:16,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:16,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1730504828, now seen corresponding path program 1 times [2018-11-18 15:12:16,780 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:16,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:16,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:16,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:16,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 15:12:17,006 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:12:17,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 15:12:17,007 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 15:12:17,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 15:12:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:12:17,011 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2018-11-18 15:12:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:12:17,232 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2018-11-18 15:12:17,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:12:17,235 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2018-11-18 15:12:17,238 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 15:12:17,240 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2018-11-18 15:12:17,240 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2018-11-18 15:12:17,240 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2018-11-18 15:12:17,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2018-11-18 15:12:17,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:17,241 INFO L705 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2018-11-18 15:12:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2018-11-18 15:12:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2018-11-18 15:12:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-18 15:12:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2018-11-18 15:12:17,249 INFO L728 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2018-11-18 15:12:17,249 INFO L608 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2018-11-18 15:12:17,249 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-18 15:12:17,249 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2018-11-18 15:12:17,252 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-18 15:12:17,252 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:17,253 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:17,253 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:17,253 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:17,254 INFO L794 eck$LassoCheckResult]: Stem: 365#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 364#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 343#L37 call main_#t~ret4 := fibo1(main_~x~0);< 344#fibo1ENTRY ~n := #in~n; 372#L8 assume !(~n < 1); 348#L10 assume !(1 == ~n); 339#L13 call #t~ret0 := fibo2(~n - 1);< 358#fibo2ENTRY ~n := #in~n; 388#L18 assume !(~n < 1); 389#L20 assume !(1 == ~n); 337#L23 call #t~ret2 := fibo1(~n - 1);< 342#fibo1ENTRY ~n := #in~n; 367#L8 assume !(~n < 1); 383#L10 assume 1 == ~n;#res := 1; 382#fibo1FINAL assume true; 378#fibo1EXIT >#46#return; 346#L23-1 [2018-11-18 15:12:17,254 INFO L796 eck$LassoCheckResult]: Loop: 346#L23-1 call #t~ret3 := fibo1(~n - 2);< 336#fibo1ENTRY ~n := #in~n; 366#L8 assume !(~n < 1); 345#L10 assume !(1 == ~n); 335#L13 call #t~ret0 := fibo2(~n - 1);< 381#fibo2ENTRY ~n := #in~n; 386#L18 assume !(~n < 1); 376#L20 assume !(1 == ~n); 333#L23 call #t~ret2 := fibo1(~n - 1);< 336#fibo1ENTRY ~n := #in~n; 366#L8 assume !(~n < 1); 345#L10 assume 1 == ~n;#res := 1; 347#fibo1FINAL assume true; 362#fibo1EXIT >#46#return; 346#L23-1 [2018-11-18 15:12:17,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1600771562, now seen corresponding path program 1 times [2018-11-18 15:12:17,254 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:17,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:17,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:17,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:17,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:17,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:17,406 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:17,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:17,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:17,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:12:17,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 15:12:17,452 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 15:12:17,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:17,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2106067024, now seen corresponding path program 1 times [2018-11-18 15:12:17,453 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:17,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:17,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:17,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:17,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:17,840 WARN L180 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-18 15:12:18,125 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-11-18 15:12:18,315 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:18,315 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:18,315 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:18,316 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:18,316 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 15:12:18,316 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:18,316 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:18,316 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:18,316 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-18 15:12:18,316 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:18,316 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:18,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:18,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:18,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:18,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:18,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:18,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:18,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:18,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:18,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:18,676 WARN L180 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-18 15:12:18,782 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:18,782 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:18,786 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:18,786 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:18,789 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:18,789 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:18,810 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:18,810 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:18,824 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:18,824 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:18,851 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:18,851 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:18,882 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 15:12:18,882 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:19,978 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 15:12:19,980 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:19,980 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:19,980 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:19,980 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:19,980 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 15:12:19,980 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:19,981 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:19,981 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:19,981 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration3_Loop [2018-11-18 15:12:19,981 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:19,981 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:19,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:19,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:20,007 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:20,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:20,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:20,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:20,037 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:20,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:20,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:20,146 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:20,146 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 15:12:20,147 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:20,147 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:20,147 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:20,148 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:20,148 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:20,148 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:20,148 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:20,148 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:20,150 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:20,150 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:20,151 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:20,151 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:20,151 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:20,151 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:20,151 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:20,152 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:20,152 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:20,153 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:20,156 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:20,157 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:20,157 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:20,157 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:20,157 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:20,158 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:20,158 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:20,158 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:20,168 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 15:12:20,172 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 15:12:20,172 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 15:12:20,173 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 15:12:20,173 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 15:12:20,173 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 15:12:20,173 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2018-11-18 15:12:20,174 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 15:12:20,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:20,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:20,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:20,392 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 [2018-11-18 15:12:20,392 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 9 states. [2018-11-18 15:12:20,755 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. [2018-11-18 15:12:20,756 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 [2018-11-18 15:12:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-18 15:12:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2018-11-18 15:12:20,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 68 transitions. Stem has 16 letters. Loop has 14 letters. [2018-11-18 15:12:20,757 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:20,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 68 transitions. Stem has 30 letters. Loop has 14 letters. [2018-11-18 15:12:20,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:20,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 68 transitions. Stem has 16 letters. Loop has 28 letters. [2018-11-18 15:12:20,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:20,758 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2018-11-18 15:12:20,763 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 15:12:20,767 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2018-11-18 15:12:20,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2018-11-18 15:12:20,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2018-11-18 15:12:20,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2018-11-18 15:12:20,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:20,768 INFO L705 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2018-11-18 15:12:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2018-11-18 15:12:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2018-11-18 15:12:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-11-18 15:12:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2018-11-18 15:12:20,784 INFO L728 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2018-11-18 15:12:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 15:12:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-18 15:12:20,784 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 9 states. [2018-11-18 15:12:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:12:20,934 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2018-11-18 15:12:20,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 15:12:20,934 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2018-11-18 15:12:20,938 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 15:12:20,941 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2018-11-18 15:12:20,941 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2018-11-18 15:12:20,942 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2018-11-18 15:12:20,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2018-11-18 15:12:20,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:20,943 INFO L705 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2018-11-18 15:12:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2018-11-18 15:12:20,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2018-11-18 15:12:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-11-18 15:12:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2018-11-18 15:12:20,954 INFO L728 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2018-11-18 15:12:20,954 INFO L608 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2018-11-18 15:12:20,954 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-18 15:12:20,954 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2018-11-18 15:12:20,956 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 15:12:20,956 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:20,956 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:20,958 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] [2018-11-18 15:12:20,958 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] [2018-11-18 15:12:20,959 INFO L794 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 !(1 == ~n); 1132#L13 call #t~ret0 := fibo2(~n - 1);< 1164#fibo2ENTRY ~n := #in~n; 1281#L18 assume !(~n < 1); 1280#L20 assume !(1 == ~n); 1167#L23 call #t~ret2 := fibo1(~n - 1);< 1130#fibo1ENTRY ~n := #in~n; 1216#L8 assume !(~n < 1); 1215#L10 assume !(1 == ~n); 1128#L13 call #t~ret0 := fibo2(~n - 1);< 1208#fibo2ENTRY ~n := #in~n; 1212#L18 assume !(~n < 1); 1213#L20 assume !(1 == ~n); 1127#L23 call #t~ret2 := fibo1(~n - 1);< 1130#fibo1ENTRY ~n := #in~n; 1216#L8 assume !(~n < 1); 1215#L10 assume !(1 == ~n); 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 !(1 == ~n); 1127#L23 call #t~ret2 := fibo1(~n - 1);< 1130#fibo1ENTRY ~n := #in~n; 1217#L8 assume !(~n < 1); 1223#L10 assume 1 == ~n;#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 !(1 == ~n); 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 1 == ~n;#res := 1; 1137#fibo2FINAL assume true; 1138#fibo2EXIT >#52#return; 1266#L13-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 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~ret0;havoc #t~ret1; 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 !(1 == ~n); 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~ret0;havoc #t~ret1; 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 [2018-11-18 15:12:20,959 INFO L796 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 !(1 == ~n); 1122#L23 call #t~ret2 := fibo1(~n - 1);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(1 == ~n); 1123#L13 call #t~ret0 := fibo2(~n - 1);< 1163#fibo2ENTRY ~n := #in~n; 1177#L18 assume !(~n < 1); 1183#L20 assume !(1 == ~n); 1122#L23 call #t~ret2 := fibo1(~n - 1);< 1126#fibo1ENTRY ~n := #in~n; 1263#L8 assume !(~n < 1); 1260#L10 assume !(1 == ~n); 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~ret0;havoc #t~ret1; 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 !(1 == ~n); 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~ret0;havoc #t~ret1; 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 [2018-11-18 15:12:20,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash 376035563, now seen corresponding path program 1 times [2018-11-18 15:12:20,959 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:20,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:20,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:20,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:20,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-11-18 15:12:21,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:21,033 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:12:21,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:21,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-11-18 15:12:21,150 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 15:12:21,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-18 15:12:21,150 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 15:12:21,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash 36254641, now seen corresponding path program 1 times [2018-11-18 15:12:21,151 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:21,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:21,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:21,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:21,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-18 15:12:21,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:21,266 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:21,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:21,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-11-18 15:12:21,324 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 15:12:21,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-18 15:12:21,324 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 15:12:21,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 15:12:21,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 15:12:21,325 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 6 states. [2018-11-18 15:12:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:12:21,380 INFO L93 Difference]: Finished difference Result 184 states and 236 transitions. [2018-11-18 15:12:21,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 15:12:21,381 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 184 states and 236 transitions. [2018-11-18 15:12:21,383 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 15:12:21,388 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 184 states to 172 states and 222 transitions. [2018-11-18 15:12:21,388 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 110 [2018-11-18 15:12:21,388 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2018-11-18 15:12:21,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 172 states and 222 transitions. [2018-11-18 15:12:21,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:21,389 INFO L705 BuchiCegarLoop]: Abstraction has 172 states and 222 transitions. [2018-11-18 15:12:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states and 222 transitions. [2018-11-18 15:12:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2018-11-18 15:12:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-11-18 15:12:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 206 transitions. [2018-11-18 15:12:21,402 INFO L728 BuchiCegarLoop]: Abstraction has 158 states and 206 transitions. [2018-11-18 15:12:21,402 INFO L608 BuchiCegarLoop]: Abstraction has 158 states and 206 transitions. [2018-11-18 15:12:21,402 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-18 15:12:21,402 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 158 states and 206 transitions. [2018-11-18 15:12:21,403 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2018-11-18 15:12:21,403 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:21,403 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:21,406 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] [2018-11-18 15:12:21,406 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] [2018-11-18 15:12:21,406 INFO L794 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 !(1 == ~n); 1895#L13 call #t~ret0 := fibo2(~n - 1);< 1909#fibo2ENTRY ~n := #in~n; 1927#L18 assume !(~n < 1); 1934#L20 assume !(1 == ~n); 1915#L23 call #t~ret2 := fibo1(~n - 1);< 1881#fibo1ENTRY ~n := #in~n; 1923#L8 assume !(~n < 1); 1968#L10 assume !(1 == ~n); 1879#L13 call #t~ret0 := fibo2(~n - 1);< 1963#fibo2ENTRY ~n := #in~n; 1967#L18 assume !(~n < 1); 1965#L20 assume !(1 == ~n); 1878#L23 call #t~ret2 := fibo1(~n - 1);< 1881#fibo1ENTRY ~n := #in~n; 1923#L8 assume !(~n < 1); 1968#L10 assume !(1 == ~n); 1879#L13 call #t~ret0 := fibo2(~n - 1);< 1963#fibo2ENTRY ~n := #in~n; 1967#L18 assume !(~n < 1); 1965#L20 assume 1 == ~n;#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 !(1 == ~n); 1878#L23 call #t~ret2 := fibo1(~n - 1);< 1881#fibo1ENTRY ~n := #in~n; 1924#L8 assume !(~n < 1); 1971#L10 assume 1 == ~n;#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 !(1 == ~n); 1898#L13 call #t~ret0 := fibo2(~n - 1);< 1955#fibo2ENTRY ~n := #in~n; 1953#L18 assume !(~n < 1); 1947#L20 assume 1 == ~n;#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~ret0;havoc #t~ret1; 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~ret0;havoc #t~ret1; 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 !(1 == ~n); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume 1 == ~n;#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~ret0;havoc #t~ret1; 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 [2018-11-18 15:12:21,407 INFO L796 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 !(1 == ~n); 1990#L23 call #t~ret2 := fibo1(~n - 1);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(1 == ~n); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume !(1 == ~n); 1990#L23 call #t~ret2 := fibo1(~n - 1);< 2002#fibo1ENTRY ~n := #in~n; 1998#L8 assume !(~n < 1); 1995#L10 assume !(1 == ~n); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume 1 == ~n;#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~ret0;havoc #t~ret1; 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 !(1 == ~n); 1936#L13 call #t~ret0 := fibo2(~n - 1);< 1914#fibo2ENTRY ~n := #in~n; 1935#L18 assume !(~n < 1); 1938#L20 assume 1 == ~n;#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~ret0;havoc #t~ret1; 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 [2018-11-18 15:12:21,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash 821073247, now seen corresponding path program 2 times [2018-11-18 15:12:21,407 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:21,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:21,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 31 proven. 84 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-18 15:12:21,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:21,639 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:21,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:12:21,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:12:21,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:12:21,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 31 proven. 84 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-18 15:12:21,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:12:21,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-18 15:12:21,720 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 15:12:21,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:21,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1445694181, now seen corresponding path program 1 times [2018-11-18 15:12:21,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:21,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:21,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:21,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:12:21,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-18 15:12:21,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:21,879 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:21,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:21,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-18 15:12:21,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:12:21,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2018-11-18 15:12:21,998 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 15:12:21,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 15:12:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-11-18 15:12:21,998 INFO L87 Difference]: Start difference. First operand 158 states and 206 transitions. cyclomatic complexity: 53 Second operand 13 states. [2018-11-18 15:12:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:12:22,569 INFO L93 Difference]: Finished difference Result 209 states and 285 transitions. [2018-11-18 15:12:22,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 15:12:22,570 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 209 states and 285 transitions. [2018-11-18 15:12:22,572 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 30 [2018-11-18 15:12:22,575 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 209 states to 209 states and 285 transitions. [2018-11-18 15:12:22,575 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 139 [2018-11-18 15:12:22,576 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2018-11-18 15:12:22,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 209 states and 285 transitions. [2018-11-18 15:12:22,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:22,577 INFO L705 BuchiCegarLoop]: Abstraction has 209 states and 285 transitions. [2018-11-18 15:12:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states and 285 transitions. [2018-11-18 15:12:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2018-11-18 15:12:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-18 15:12:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 263 transitions. [2018-11-18 15:12:22,597 INFO L728 BuchiCegarLoop]: Abstraction has 192 states and 263 transitions. [2018-11-18 15:12:22,597 INFO L608 BuchiCegarLoop]: Abstraction has 192 states and 263 transitions. [2018-11-18 15:12:22,598 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-18 15:12:22,598 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 192 states and 263 transitions. [2018-11-18 15:12:22,599 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 30 [2018-11-18 15:12:22,599 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:22,599 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:22,600 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] [2018-11-18 15:12:22,600 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] [2018-11-18 15:12:22,601 INFO L794 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 !(1 == ~n); 2727#L13 call #t~ret0 := fibo2(~n - 1);< 2728#fibo2ENTRY ~n := #in~n; 2747#L18 assume !(~n < 1); 2753#L20 assume !(1 == ~n); 2732#L23 call #t~ret2 := fibo1(~n - 1);< 2840#fibo1ENTRY ~n := #in~n; 2841#L8 assume !(~n < 1); 2838#L10 assume !(1 == ~n); 2698#L13 call #t~ret0 := fibo2(~n - 1);< 2781#fibo2ENTRY ~n := #in~n; 2845#L18 assume !(~n < 1); 2844#L20 assume 1 == ~n;#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 !(1 == ~n); 2691#L23 call #t~ret2 := fibo1(~n - 1);< 2694#fibo1ENTRY ~n := #in~n; 2743#L8 assume !(~n < 1); 2707#L10 assume !(1 == ~n); 2692#L13 call #t~ret0 := fibo2(~n - 1);< 2787#fibo2ENTRY ~n := #in~n; 2786#L18 assume !(~n < 1); 2783#L20 assume !(1 == ~n); 2691#L23 call #t~ret2 := fibo1(~n - 1);< 2694#fibo1ENTRY ~n := #in~n; 2744#L8 assume !(~n < 1); 2790#L10 assume 1 == ~n;#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 [2018-11-18 15:12:22,601 INFO L796 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 !(1 == ~n); 2813#L23 call #t~ret2 := fibo1(~n - 1);< 2834#fibo1ENTRY ~n := #in~n; 2831#L8 assume !(~n < 1); 2829#L10 assume !(1 == ~n); 2808#L13 call #t~ret0 := fibo2(~n - 1);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume !(~n < 1); 2862#L20 assume !(1 == ~n); 2813#L23 call #t~ret2 := fibo1(~n - 1);< 2834#fibo1ENTRY ~n := #in~n; 2831#L8 assume !(~n < 1); 2829#L10 assume !(1 == ~n); 2808#L13 call #t~ret0 := fibo2(~n - 1);< 2818#fibo2ENTRY ~n := #in~n; 2864#L18 assume !(~n < 1); 2862#L20 assume 1 == ~n;#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~ret0;havoc #t~ret1; 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 [2018-11-18 15:12:22,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:22,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1519288695, now seen corresponding path program 1 times [2018-11-18 15:12:22,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:22,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:22,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:22,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:22,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 15:12:22,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:22,713 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:12:22,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:22,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-18 15:12:23,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:12:23,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-18 15:12:23,018 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 15:12:23,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1513837346, now seen corresponding path program 1 times [2018-11-18 15:12:23,018 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:23,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:23,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:23,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:23,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 15:12:23,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:23,157 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:23,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:23,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 15:12:23,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:12:23,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-11-18 15:12:23,377 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 15:12:23,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 15:12:23,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-18 15:12:23,378 INFO L87 Difference]: Start difference. First operand 192 states and 263 transitions. cyclomatic complexity: 78 Second operand 11 states. [2018-11-18 15:12:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:12:23,551 INFO L93 Difference]: Finished difference Result 229 states and 318 transitions. [2018-11-18 15:12:23,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 15:12:23,551 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 229 states and 318 transitions. [2018-11-18 15:12:23,554 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 32 [2018-11-18 15:12:23,556 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 229 states to 229 states and 318 transitions. [2018-11-18 15:12:23,557 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2018-11-18 15:12:23,557 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 154 [2018-11-18 15:12:23,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 229 states and 318 transitions. [2018-11-18 15:12:23,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:23,559 INFO L705 BuchiCegarLoop]: Abstraction has 229 states and 318 transitions. [2018-11-18 15:12:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states and 318 transitions. [2018-11-18 15:12:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 211. [2018-11-18 15:12:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-11-18 15:12:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 293 transitions. [2018-11-18 15:12:23,576 INFO L728 BuchiCegarLoop]: Abstraction has 211 states and 293 transitions. [2018-11-18 15:12:23,576 INFO L608 BuchiCegarLoop]: Abstraction has 211 states and 293 transitions. [2018-11-18 15:12:23,576 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-18 15:12:23,576 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 211 states and 293 transitions. [2018-11-18 15:12:23,578 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 32 [2018-11-18 15:12:23,578 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:23,578 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:23,579 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] [2018-11-18 15:12:23,579 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:23,579 INFO L794 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 !(1 == ~n); 3427#L13 call #t~ret0 := fibo2(~n - 1);< 3428#fibo2ENTRY ~n := #in~n; 3464#L18 assume !(~n < 1); 3465#L20 assume !(1 == ~n); 3403#L23 call #t~ret2 := fibo1(~n - 1);< 3441#fibo1ENTRY ~n := #in~n; 3443#L8 assume !(~n < 1); 3401#L10 assume !(1 == ~n); 3404#L13 call #t~ret0 := fibo2(~n - 1);< 3447#fibo2ENTRY ~n := #in~n; 3448#L18 assume !(~n < 1); 3540#L20 assume 1 == ~n;#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 !(1 == ~n); 3391#L23 call #t~ret2 := fibo1(~n - 1);< 3394#fibo1ENTRY ~n := #in~n; 3455#L8 assume !(~n < 1); 3456#L10 assume !(1 == ~n); 3393#L13 call #t~ret0 := fibo2(~n - 1);< 3486#fibo2ENTRY ~n := #in~n; 3503#L18 assume !(~n < 1); 3502#L20 assume !(1 == ~n); 3391#L23 call #t~ret2 := fibo1(~n - 1);< 3394#fibo1ENTRY ~n := #in~n; 3442#L8 assume !(~n < 1); 3510#L10 assume 1 == ~n;#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 [2018-11-18 15:12:23,580 INFO L796 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 !(1 == ~n); 3530#L23 call #t~ret2 := fibo1(~n - 1);< 3538#fibo1ENTRY ~n := #in~n; 3555#L8 assume !(~n < 1); 3547#L10 assume !(1 == ~n); 3537#L13 call #t~ret0 := fibo2(~n - 1);< 3546#fibo2ENTRY ~n := #in~n; 3544#L18 assume !(~n < 1); 3541#L20 assume !(1 == ~n); 3530#L23 call #t~ret2 := fibo1(~n - 1);< 3538#fibo1ENTRY ~n := #in~n; 3555#L8 assume !(~n < 1); 3547#L10 assume 1 == ~n;#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 [2018-11-18 15:12:23,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1519288695, now seen corresponding path program 2 times [2018-11-18 15:12:23,580 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:23,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:23,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:23,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:23,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 15:12:23,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:23,645 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:23,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:12:23,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:12:23,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:12:23,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-18 15:12:23,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:12:23,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2018-11-18 15:12:23,904 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 15:12:23,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1626884941, now seen corresponding path program 1 times [2018-11-18 15:12:23,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:23,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:23,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:23,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:12:23,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:24,105 WARN L180 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-11-18 15:12:24,374 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:24,374 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:24,374 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:24,374 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:24,374 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 15:12:24,374 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:24,374 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:24,374 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:24,374 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-18 15:12:24,374 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:24,375 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:24,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:24,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:24,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:24,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:24,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:24,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:24,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:24,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:24,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:24,460 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:24,460 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:24,462 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:24,462 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:24,465 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:24,465 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:24,483 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:24,484 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:24,489 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:24,489 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:24,508 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:24,508 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:24,510 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:24,510 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:24,532 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:24,532 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:24,534 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:24,534 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:24,555 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:24,555 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:24,577 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 15:12:24,577 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:25,178 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 15:12:25,180 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:25,180 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:25,180 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:25,180 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:25,180 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 15:12:25,180 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:25,180 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:25,180 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:25,180 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration7_Loop [2018-11-18 15:12:25,181 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:25,181 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:25,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:25,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:25,188 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:25,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:25,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:25,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:25,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:25,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:25,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:25,516 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:25,516 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 15:12:25,516 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:25,517 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:25,517 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:25,517 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:25,517 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:25,517 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:25,517 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:25,517 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:25,518 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:25,518 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:25,518 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:25,518 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:25,518 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:25,519 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:25,519 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:25,519 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:25,519 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:25,519 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:25,519 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:25,519 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:25,520 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:25,520 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:25,520 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:25,520 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:25,520 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:25,520 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:25,523 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:25,523 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:25,523 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:25,523 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:25,524 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:25,524 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:25,524 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:25,524 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:25,524 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:25,524 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:25,524 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:25,525 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:25,525 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:25,525 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:25,525 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:25,525 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:25,525 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:25,525 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:25,527 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 15:12:25,535 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 15:12:25,535 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 15:12:25,535 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 15:12:25,535 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 15:12:25,536 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 15:12:25,536 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2018-11-18 15:12:25,536 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 15:12:25,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:25,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:25,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 15:12:25,905 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 [2018-11-18 15:12:25,905 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 211 states and 293 transitions. cyclomatic complexity: 89 Second operand 10 states. [2018-11-18 15:12:26,296 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. [2018-11-18 15:12:26,296 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 [2018-11-18 15:12:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-11-18 15:12:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 70 transitions. [2018-11-18 15:12:26,297 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 70 transitions. Stem has 46 letters. Loop has 26 letters. [2018-11-18 15:12:26,298 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:26,298 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 70 transitions. Stem has 72 letters. Loop has 26 letters. [2018-11-18 15:12:26,299 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:26,299 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 70 transitions. Stem has 46 letters. Loop has 52 letters. [2018-11-18 15:12:26,299 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:26,299 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1106 states and 1518 transitions. [2018-11-18 15:12:26,314 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 73 [2018-11-18 15:12:26,325 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1106 states to 890 states and 1248 transitions. [2018-11-18 15:12:26,325 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 431 [2018-11-18 15:12:26,326 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 442 [2018-11-18 15:12:26,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 890 states and 1248 transitions. [2018-11-18 15:12:26,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:26,327 INFO L705 BuchiCegarLoop]: Abstraction has 890 states and 1248 transitions. [2018-11-18 15:12:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states and 1248 transitions. [2018-11-18 15:12:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 830. [2018-11-18 15:12:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2018-11-18 15:12:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1162 transitions. [2018-11-18 15:12:26,357 INFO L728 BuchiCegarLoop]: Abstraction has 830 states and 1162 transitions. [2018-11-18 15:12:26,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:12:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:12:26,358 INFO L87 Difference]: Start difference. First operand 830 states and 1162 transitions. Second operand 14 states. [2018-11-18 15:12:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:12:27,411 INFO L93 Difference]: Finished difference Result 823 states and 1146 transitions. [2018-11-18 15:12:27,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 15:12:27,411 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 823 states and 1146 transitions. [2018-11-18 15:12:27,422 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 73 [2018-11-18 15:12:27,432 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 823 states to 793 states and 1106 transitions. [2018-11-18 15:12:27,432 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 409 [2018-11-18 15:12:27,433 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 409 [2018-11-18 15:12:27,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 793 states and 1106 transitions. [2018-11-18 15:12:27,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:27,435 INFO L705 BuchiCegarLoop]: Abstraction has 793 states and 1106 transitions. [2018-11-18 15:12:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states and 1106 transitions. [2018-11-18 15:12:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 728. [2018-11-18 15:12:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 728 states. [2018-11-18 15:12:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1025 transitions. [2018-11-18 15:12:27,461 INFO L728 BuchiCegarLoop]: Abstraction has 728 states and 1025 transitions. [2018-11-18 15:12:27,461 INFO L608 BuchiCegarLoop]: Abstraction has 728 states and 1025 transitions. [2018-11-18 15:12:27,461 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-18 15:12:27,461 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 728 states and 1025 transitions. [2018-11-18 15:12:27,465 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 73 [2018-11-18 15:12:27,465 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:27,465 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:27,466 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:27,466 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:27,466 INFO L794 eck$LassoCheckResult]: Stem: 6892#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6886#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret4, main_~x~0, main_~result~0;main_~x~0 := 6; 6850#L37 call main_#t~ret4 := fibo1(main_~x~0);< 6851#fibo1ENTRY ~n := #in~n; 6970#L8 assume !(~n < 1); 6969#L10 assume !(1 == ~n); 6965#L13 call #t~ret0 := fibo2(~n - 1);< 6968#fibo2ENTRY ~n := #in~n; 6967#L18 assume !(~n < 1); 6966#L20 assume !(1 == ~n); 6939#L23 call #t~ret2 := fibo1(~n - 1);< 6964#fibo1ENTRY ~n := #in~n; 6962#L8 assume !(~n < 1); 6963#L10 assume !(1 == ~n); 6931#L13 call #t~ret0 := fibo2(~n - 1);< 6938#fibo2ENTRY ~n := #in~n; 6937#L18 assume !(~n < 1); 6936#L20 assume !(1 == ~n); 6883#L23 call #t~ret2 := fibo1(~n - 1);< 6935#fibo1ENTRY ~n := #in~n; 6950#L8 assume !(~n < 1); 6946#L10 assume 1 == ~n;#res := 1; 6943#fibo1FINAL assume true; 6944#fibo1EXIT >#46#return; 6921#L23-1 call #t~ret3 := fibo1(~n - 2);< 6932#fibo1ENTRY ~n := #in~n; 6926#L8 assume !(~n < 1); 6927#L10 assume !(1 == ~n); 6917#L13 call #t~ret0 := fibo2(~n - 1);< 6923#fibo2ENTRY ~n := #in~n; 6916#L18 assume !(~n < 1); 6918#L20 assume !(1 == ~n); 7006#L23 call #t~ret2 := fibo1(~n - 1);< 7187#fibo1ENTRY ~n := #in~n; 7188#L8 assume !(~n < 1); 7176#L10 assume !(1 == ~n); 7178#L13 call #t~ret0 := fibo2(~n - 1);< 7197#fibo2ENTRY [2018-11-18 15:12:27,466 INFO L796 eck$LassoCheckResult]: Loop: 7197#fibo2ENTRY ~n := #in~n; 7196#L18 assume !(~n < 1); 7194#L20 assume !(1 == ~n); 7183#L23 call #t~ret2 := fibo1(~n - 1);< 7190#fibo1ENTRY ~n := #in~n; 7182#L8 assume !(~n < 1); 7186#L10 assume !(1 == ~n); 7189#L13 call #t~ret0 := fibo2(~n - 1);< 7197#fibo2ENTRY [2018-11-18 15:12:27,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:27,466 INFO L82 PathProgramCache]: Analyzing trace with hash 11031926, now seen corresponding path program 1 times [2018-11-18 15:12:27,467 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:27,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:27,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:27,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:27,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 15:12:27,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:27,800 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:27,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:27,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 15:12:28,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:12:28,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-11-18 15:12:28,018 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 15:12:28,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:28,018 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 2 times [2018-11-18 15:12:28,018 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:28,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:28,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:28,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:28,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:28,163 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:28,163 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:28,163 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:28,163 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:28,163 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 15:12:28,163 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:28,163 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:28,164 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:28,164 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration8_Loop [2018-11-18 15:12:28,164 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:28,164 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:28,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,172 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,176 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,180 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,256 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:28,257 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,278 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,278 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,280 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:28,280 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,299 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,299 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,302 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:28,302 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,321 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,321 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,325 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:28,325 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,344 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,344 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,347 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:28,347 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,363 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,363 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,365 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:28,365 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,381 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,382 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,384 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:28,384 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,403 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,403 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,405 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:28,405 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,424 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,424 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,426 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:28,426 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,443 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,443 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,445 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:28,445 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,464 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:28,464 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:28,483 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 15:12:28,484 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:28,535 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 15:12:28,537 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:28,537 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:28,537 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:28,537 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:28,537 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 15:12:28,537 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:28,537 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:28,537 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:28,537 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration8_Loop [2018-11-18 15:12:28,537 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:28,537 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:28,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,546 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,609 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:28,827 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:28,827 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 15:12:28,827 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:28,828 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:28,828 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:28,828 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:28,828 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:28,828 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:28,828 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:28,828 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:28,829 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:28,829 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:28,829 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:28,830 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:28,830 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:28,830 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:28,830 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:28,830 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:28,830 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:28,831 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:28,831 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:28,831 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:28,831 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:28,831 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:28,831 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:28,831 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:28,832 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:28,832 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:28,832 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:28,832 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:28,833 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:28,833 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:28,833 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:28,833 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:28,833 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:28,833 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:28,833 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:28,834 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:28,834 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:28,834 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:28,834 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:28,835 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:28,835 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:28,835 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:28,835 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:28,835 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:28,836 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:28,836 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:28,836 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:28,836 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:28,836 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:28,836 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:28,837 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:28,837 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:28,837 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:28,837 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:28,838 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:28,838 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:28,838 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:28,838 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:28,838 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:28,838 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:28,839 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:28,839 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:28,840 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:28,840 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:28,841 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:28,841 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:28,842 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:28,842 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:28,842 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:28,842 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:28,842 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:28,843 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:28,843 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:28,844 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:28,844 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:28,844 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:28,844 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:28,844 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:28,844 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:28,844 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:28,845 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 15:12:28,846 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 15:12:28,846 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 15:12:28,846 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 15:12:28,847 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 15:12:28,847 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 15:12:28,847 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2018-11-18 15:12:28,847 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 15:12:28,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:28,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:28,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:29,077 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 15:12:29,078 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 728 states and 1025 transitions. cyclomatic complexity: 318 Second operand 7 states. [2018-11-18 15:12:29,602 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. [2018-11-18 15:12:29,605 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 [2018-11-18 15:12:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 15:12:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2018-11-18 15:12:29,606 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 37 letters. Loop has 8 letters. [2018-11-18 15:12:29,606 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:29,606 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 45 letters. Loop has 8 letters. [2018-11-18 15:12:29,606 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:29,607 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 37 letters. Loop has 16 letters. [2018-11-18 15:12:29,607 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:29,607 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 852 states and 1156 transitions. [2018-11-18 15:12:29,617 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 64 [2018-11-18 15:12:29,624 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 852 states to 776 states and 1074 transitions. [2018-11-18 15:12:29,624 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 377 [2018-11-18 15:12:29,625 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 387 [2018-11-18 15:12:29,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 776 states and 1074 transitions. [2018-11-18 15:12:29,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:29,626 INFO L705 BuchiCegarLoop]: Abstraction has 776 states and 1074 transitions. [2018-11-18 15:12:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states and 1074 transitions. [2018-11-18 15:12:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 767. [2018-11-18 15:12:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-11-18 15:12:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1065 transitions. [2018-11-18 15:12:29,646 INFO L728 BuchiCegarLoop]: Abstraction has 767 states and 1065 transitions. [2018-11-18 15:12:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 15:12:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2018-11-18 15:12:29,647 INFO L87 Difference]: Start difference. First operand 767 states and 1065 transitions. Second operand 24 states. [2018-11-18 15:12:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:12:31,578 INFO L93 Difference]: Finished difference Result 309 states and 410 transitions. [2018-11-18 15:12:31,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-18 15:12:31,580 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 309 states and 410 transitions. [2018-11-18 15:12:31,583 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 27 [2018-11-18 15:12:31,589 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 309 states to 291 states and 387 transitions. [2018-11-18 15:12:31,589 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 210 [2018-11-18 15:12:31,590 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 211 [2018-11-18 15:12:31,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 291 states and 387 transitions. [2018-11-18 15:12:31,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:31,593 INFO L705 BuchiCegarLoop]: Abstraction has 291 states and 387 transitions. [2018-11-18 15:12:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states and 387 transitions. [2018-11-18 15:12:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 263. [2018-11-18 15:12:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-11-18 15:12:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 349 transitions. [2018-11-18 15:12:31,605 INFO L728 BuchiCegarLoop]: Abstraction has 263 states and 349 transitions. [2018-11-18 15:12:31,605 INFO L608 BuchiCegarLoop]: Abstraction has 263 states and 349 transitions. [2018-11-18 15:12:31,605 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-18 15:12:31,605 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 263 states and 349 transitions. [2018-11-18 15:12:31,607 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 27 [2018-11-18 15:12:31,607 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:31,607 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:31,608 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] [2018-11-18 15:12:31,608 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:31,608 INFO L794 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 !(1 == ~n); 9823#L13 call #t~ret0 := fibo2(~n - 1);< 9856#fibo2ENTRY ~n := #in~n; 9871#L18 assume !(~n < 1); 9877#L20 assume !(1 == ~n); 9822#L23 call #t~ret2 := fibo1(~n - 1);< 9824#fibo1ENTRY ~n := #in~n; 9929#L8 assume !(~n < 1); 9927#L10 assume !(1 == ~n); 9914#L13 call #t~ret0 := fibo2(~n - 1);< 9925#fibo2ENTRY ~n := #in~n; 9923#L18 assume !(~n < 1); 9921#L20 assume !(1 == ~n); 9896#L23 call #t~ret2 := fibo1(~n - 1);< 9909#fibo1ENTRY ~n := #in~n; 9910#L8 assume !(~n < 1); 10042#L10 assume !(1 == ~n); 10040#L13 call #t~ret0 := fibo2(~n - 1);< 10041#fibo2ENTRY ~n := #in~n; 10049#L18 assume !(~n < 1); 10048#L20 assume 1 == ~n;#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~ret0;havoc #t~ret1; 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 1 == ~n;#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 [2018-11-18 15:12:31,608 INFO L796 eck$LassoCheckResult]: Loop: 9968#fibo2ENTRY ~n := #in~n; 9996#L18 assume !(~n < 1); 9994#L20 assume !(1 == ~n); 9951#L23 call #t~ret2 := fibo1(~n - 1);< 9958#fibo1ENTRY ~n := #in~n; 9978#L8 assume !(~n < 1); 9975#L10 assume !(1 == ~n); 9965#L13 call #t~ret0 := fibo2(~n - 1);< 9968#fibo2ENTRY [2018-11-18 15:12:31,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash -177678082, now seen corresponding path program 3 times [2018-11-18 15:12:31,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:31,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:31,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:31,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:12:31,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:31,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:31,630 INFO L82 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 3 times [2018-11-18 15:12:31,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:31,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:31,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:31,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:12:31,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:31,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:31,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1358906085, now seen corresponding path program 4 times [2018-11-18 15:12:31,635 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:31,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:31,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:31,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:12:31,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 15:12:32,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:12:32,057 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:32,066 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 15:12:32,080 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 15:12:32,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:12:32,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 15:12:32,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:12:32,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-18 15:12:32,352 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:32,352 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:32,352 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:32,352 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:32,352 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 15:12:32,352 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:32,353 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:32,353 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:32,353 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration9_Loop [2018-11-18 15:12:32,353 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:32,353 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:32,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,382 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,587 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:32,587 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:32,595 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:32,595 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:32,605 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:32,605 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:32,633 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:32,633 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:32,646 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:32,646 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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) [2018-11-18 15:12:32,664 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:32,664 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:32,666 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:32,666 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:32,693 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:32,693 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:32,696 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:32,696 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:32,722 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:32,722 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:32,725 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:32,725 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:32,744 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:32,744 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:32,761 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 15:12:32,761 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:32,807 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 15:12:32,809 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:32,809 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:32,809 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:32,809 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:32,809 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 15:12:32,809 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:32,809 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:32,809 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:32,809 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration9_Loop [2018-11-18 15:12:32,809 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:32,809 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:32,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,901 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,918 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:32,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:33,090 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:33,090 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 15:12:33,090 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:33,091 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:33,091 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:33,091 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:33,091 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:33,091 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:33,091 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:33,091 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:33,092 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:33,092 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:33,092 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:33,092 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:33,093 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:33,093 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:33,093 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:33,093 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:33,093 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:33,093 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:33,094 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:33,094 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:33,094 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:33,094 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:33,094 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:33,094 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:33,095 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:33,095 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:33,095 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:33,096 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:33,096 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:33,096 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:33,096 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:33,096 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:33,096 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:33,097 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:33,097 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:33,099 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:33,099 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:33,099 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:33,100 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:33,100 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:33,100 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:33,100 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:33,100 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:33,100 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:33,101 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:33,101 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:33,101 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:33,101 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:33,102 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:33,102 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:33,102 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:33,102 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:33,102 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:33,103 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:33,103 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:33,103 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:33,103 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:33,103 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:33,103 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:33,104 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:33,104 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:33,104 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:33,104 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:33,105 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:33,110 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:33,111 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:33,111 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:33,111 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:33,111 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:33,111 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:33,111 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:33,113 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 15:12:33,114 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 15:12:33,114 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 15:12:33,115 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 15:12:33,115 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 15:12:33,115 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 15:12:33,115 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2018-11-18 15:12:33,115 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 15:12:33,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:33,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:33,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:33,427 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 15:12:33,427 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92 Second operand 7 states. [2018-11-18 15:12:33,842 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. [2018-11-18 15:12:33,846 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 [2018-11-18 15:12:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 15:12:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2018-11-18 15:12:33,846 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 46 letters. Loop has 8 letters. [2018-11-18 15:12:33,847 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:33,847 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 15:12:33,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:33,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:34,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:34,234 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 15:12:34,234 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92 Second operand 7 states. [2018-11-18 15:12:34,637 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. [2018-11-18 15:12:34,638 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 [2018-11-18 15:12:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 15:12:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2018-11-18 15:12:34,639 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 46 letters. Loop has 8 letters. [2018-11-18 15:12:34,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:34,639 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 15:12:34,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:34,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:34,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:34,860 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 15:12:34,860 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 263 states and 349 transitions. cyclomatic complexity: 92 Second operand 7 states. [2018-11-18 15:12:35,222 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. [2018-11-18 15:12:35,223 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 [2018-11-18 15:12:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 15:12:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2018-11-18 15:12:35,223 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 46 letters. Loop has 8 letters. [2018-11-18 15:12:35,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:35,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 54 letters. Loop has 8 letters. [2018-11-18 15:12:35,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:35,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 46 letters. Loop has 16 letters. [2018-11-18 15:12:35,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:35,224 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 641 transitions. [2018-11-18 15:12:35,228 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 55 [2018-11-18 15:12:35,231 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 380 states and 503 transitions. [2018-11-18 15:12:35,231 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 223 [2018-11-18 15:12:35,231 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 242 [2018-11-18 15:12:35,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 380 states and 503 transitions. [2018-11-18 15:12:35,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:35,231 INFO L705 BuchiCegarLoop]: Abstraction has 380 states and 503 transitions. [2018-11-18 15:12:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states and 503 transitions. [2018-11-18 15:12:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 353. [2018-11-18 15:12:35,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2018-11-18 15:12:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 455 transitions. [2018-11-18 15:12:35,238 INFO L728 BuchiCegarLoop]: Abstraction has 353 states and 455 transitions. [2018-11-18 15:12:35,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 15:12:35,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2018-11-18 15:12:35,239 INFO L87 Difference]: Start difference. First operand 353 states and 455 transitions. Second operand 14 states. [2018-11-18 15:12:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:12:35,687 INFO L93 Difference]: Finished difference Result 243 states and 301 transitions. [2018-11-18 15:12:35,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 15:12:35,701 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 243 states and 301 transitions. [2018-11-18 15:12:35,703 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-11-18 15:12:35,704 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 243 states to 208 states and 253 transitions. [2018-11-18 15:12:35,704 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2018-11-18 15:12:35,705 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 174 [2018-11-18 15:12:35,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 208 states and 253 transitions. [2018-11-18 15:12:35,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 15:12:35,705 INFO L705 BuchiCegarLoop]: Abstraction has 208 states and 253 transitions. [2018-11-18 15:12:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states and 253 transitions. [2018-11-18 15:12:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2018-11-18 15:12:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-18 15:12:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2018-11-18 15:12:35,720 INFO L728 BuchiCegarLoop]: Abstraction has 192 states and 230 transitions. [2018-11-18 15:12:35,720 INFO L608 BuchiCegarLoop]: Abstraction has 192 states and 230 transitions. [2018-11-18 15:12:35,720 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-11-18 15:12:35,721 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 192 states and 230 transitions. [2018-11-18 15:12:35,734 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2018-11-18 15:12:35,734 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 15:12:35,734 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 15:12:35,735 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] [2018-11-18 15:12:35,735 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:12:35,735 INFO L794 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 !(1 == ~n); 12856#L13 call #t~ret0 := fibo2(~n - 1);< 12857#fibo2ENTRY ~n := #in~n; 12913#L18 assume !(~n < 1); 12912#L20 assume !(1 == ~n); 12847#L23 call #t~ret2 := fibo1(~n - 1);< 12870#fibo1ENTRY ~n := #in~n; 12871#L8 assume !(~n < 1); 12846#L10 assume !(1 == ~n); 12848#L13 call #t~ret0 := fibo2(~n - 1);< 12902#fibo2ENTRY ~n := #in~n; 12899#L18 assume !(~n < 1); 12900#L20 assume !(1 == ~n); 12854#L23 call #t~ret2 := fibo1(~n - 1);< 12887#fibo1ENTRY ~n := #in~n; 12889#L8 assume !(~n < 1); 12907#L10 assume !(1 == ~n); 12852#L13 call #t~ret0 := fibo2(~n - 1);< 12855#fibo2ENTRY ~n := #in~n; 12993#L18 assume !(~n < 1); 12991#L20 assume 1 == ~n;#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~ret0;havoc #t~ret1; 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 1 == ~n;#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 !(1 == ~n); 12830#L23 call #t~ret2 := fibo1(~n - 1);< 12833#fibo1ENTRY ~n := #in~n; 12869#L8 assume !(~n < 1); 12844#L10 assume 1 == ~n;#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~ret0;havoc #t~ret1; 12922#fibo1FINAL assume true; 12921#fibo1EXIT >#46#return; 12865#L23-1 call #t~ret3 := fibo1(~n - 2);< 12890#fibo1ENTRY [2018-11-18 15:12:35,735 INFO L796 eck$LassoCheckResult]: Loop: 12890#fibo1ENTRY ~n := #in~n; 12891#L8 assume !(~n < 1); 12879#L10 assume !(1 == ~n); 12881#L13 call #t~ret0 := fibo2(~n - 1);< 12903#fibo2ENTRY ~n := #in~n; 12904#L18 assume !(~n < 1); 12959#L20 assume !(1 == ~n); 12864#L23 call #t~ret2 := fibo1(~n - 1);< 12890#fibo1ENTRY [2018-11-18 15:12:35,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:35,735 INFO L82 PathProgramCache]: Analyzing trace with hash 944778444, now seen corresponding path program 1 times [2018-11-18 15:12:35,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:35,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:35,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:35,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:12:35,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:35,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:35,769 INFO L82 PathProgramCache]: Analyzing trace with hash 181289832, now seen corresponding path program 4 times [2018-11-18 15:12:35,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:35,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:35,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:35,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:12:35,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:35,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1215722803, now seen corresponding path program 2 times [2018-11-18 15:12:35,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:12:35,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:12:35,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:35,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:12:35,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:12:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 15:12:35,977 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-18 15:12:36,267 WARN L180 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-18 15:12:36,434 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:36,434 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:36,435 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:36,435 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:36,435 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 15:12:36,435 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:36,435 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:36,435 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:36,435 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration10_Loop [2018-11-18 15:12:36,435 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:36,435 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:36,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,511 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,604 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:36,604 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:36,606 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:36,606 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:36,619 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:36,619 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:36,647 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:36,647 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:36,649 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:36,649 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:36,678 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:36,678 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:36,680 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:36,680 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:36,698 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:36,698 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:36,701 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:36,702 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:36,719 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:36,719 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:36,721 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 15:12:36,721 INFO L448 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_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:36,739 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 15:12:36,739 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6da00e6-4339-4e99-94f7-828e456098a0/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 [2018-11-18 15:12:36,764 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 15:12:36,764 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 15:12:36,824 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 15:12:36,826 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 15:12:36,826 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 15:12:36,826 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 15:12:36,826 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 15:12:36,826 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 15:12:36,826 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 15:12:36,826 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 15:12:36,827 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 15:12:36,827 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6_false-unreach-call_true-termination.c_Iteration10_Loop [2018-11-18 15:12:36,827 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 15:12:36,827 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 15:12:36,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,857 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,859 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,861 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,889 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:36,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 15:12:37,014 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 15:12:37,014 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 15:12:37,014 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:37,015 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:37,015 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:37,015 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:37,015 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:37,015 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:37,015 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:37,015 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:37,016 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:37,016 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:37,016 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:37,016 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:37,017 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:37,017 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:37,017 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:37,017 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:37,017 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:37,018 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:37,018 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:37,018 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:37,018 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:37,018 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:37,018 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:37,019 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:37,019 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:37,019 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:37,019 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:37,020 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:37,020 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:37,020 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:37,020 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:37,020 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:37,020 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:37,020 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:37,021 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:37,021 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:37,021 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:37,022 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:37,022 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:37,022 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:37,022 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:37,022 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:37,022 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:37,022 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:37,023 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 15:12:37,023 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 15:12:37,023 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 15:12:37,023 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 15:12:37,023 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 15:12:37,024 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 15:12:37,024 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 15:12:37,024 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 15:12:37,024 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 15:12:37,025 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 15:12:37,026 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 15:12:37,026 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 15:12:37,027 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 15:12:37,027 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 15:12:37,027 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 15:12:37,027 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2018-11-18 15:12:37,027 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 15:12:37,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:37,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:37,350 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-11-18 15:12:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:37,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:37,523 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 15:12:37,523 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42 Second operand 7 states. [2018-11-18 15:12:37,597 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. [2018-11-18 15:12:37,598 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 [2018-11-18 15:12:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 15:12:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2018-11-18 15:12:37,599 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 67 letters. Loop has 8 letters. [2018-11-18 15:12:37,599 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:37,599 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 15:12:37,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:37,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:37,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:37,926 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 15:12:37,926 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42 Second operand 7 states. [2018-11-18 15:12:37,994 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. [2018-11-18 15:12:37,995 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 [2018-11-18 15:12:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 15:12:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2018-11-18 15:12:37,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 67 letters. Loop has 8 letters. [2018-11-18 15:12:37,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:37,995 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 15:12:38,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:12:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:38,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:12:38,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:12:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:12:38,238 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-11-18 15:12:38,239 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 230 transitions. cyclomatic complexity: 42 Second operand 7 states. [2018-11-18 15:12:38,495 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. [2018-11-18 15:12:38,495 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 [2018-11-18 15:12:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 15:12:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2018-11-18 15:12:38,495 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 67 letters. Loop has 8 letters. [2018-11-18 15:12:38,496 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:38,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 75 letters. Loop has 8 letters. [2018-11-18 15:12:38,496 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:38,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 67 letters. Loop has 16 letters. [2018-11-18 15:12:38,496 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 15:12:38,496 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 266 states and 322 transitions. [2018-11-18 15:12:38,498 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 15:12:38,498 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 266 states to 0 states and 0 transitions. [2018-11-18 15:12:38,498 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-18 15:12:38,499 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-18 15:12:38,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-18 15:12:38,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-18 15:12:38,499 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:12:38,499 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:12:38,500 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:12:38,500 INFO L442 BuchiCegarLoop]: ======== Iteration 11============ [2018-11-18 15:12:38,500 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-18 15:12:38,500 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 15:12:38,500 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-18 15:12:38,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 03:12:38 BoogieIcfgContainer [2018-11-18 15:12:38,505 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-18 15:12:38,505 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:12:38,505 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:12:38,505 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:12:38,506 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:12:13" (3/4) ... [2018-11-18 15:12:38,509 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 15:12:38,509 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:12:38,510 INFO L168 Benchmark]: Toolchain (without parser) took 26059.27 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 357.0 MB). Free memory was 958.5 MB in the beginning and 903.2 MB in the end (delta: 55.3 MB). Peak memory consumption was 412.3 MB. Max. memory is 11.5 GB. [2018-11-18 15:12:38,510 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:12:38,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.55 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 MB in the beginning and 947.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:12:38,511 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.94 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:12:38,511 INFO L168 Benchmark]: Boogie Preprocessor took 16.75 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:12:38,511 INFO L168 Benchmark]: RCFGBuilder took 773.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 945.0 MB in the beginning and 1.2 GB in the end (delta: -211.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-18 15:12:38,512 INFO L168 Benchmark]: BuchiAutomizer took 24929.19 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 183.0 MB). Free memory was 1.2 GB in the beginning and 903.2 MB in the end (delta: 253.7 MB). Peak memory consumption was 436.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:12:38,512 INFO L168 Benchmark]: Witness Printer took 4.10 ms. Allocated memory is still 1.4 GB. Free memory is still 903.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:12:38,514 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 291.55 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 MB in the beginning and 947.7 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 40.94 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.75 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 773.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 945.0 MB in the beginning and 1.2 GB in the end (delta: -211.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 24929.19 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 183.0 MB). Free memory was 1.2 GB in the beginning and 903.2 MB in the end (delta: 253.7 MB). Peak memory consumption was 436.7 MB. Max. memory is 11.5 GB. * Witness Printer took 4.10 ms. Allocated memory is still 1.4 GB. Free memory is still 903.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 24.8s and 11 iterations. TraceHistogramMax:8. Analysis of lassos took 13.5s. Construction of modules took 4.0s. Büchi inclusion checks took 6.7s. 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, 4.0s 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: 2.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...