./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 06:07:04,453 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 06:07:04,454 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 06:07:04,465 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 06:07:04,465 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 06:07:04,466 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 06:07:04,468 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 06:07:04,470 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 06:07:04,472 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 06:07:04,472 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 06:07:04,473 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 06:07:04,473 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 06:07:04,474 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 06:07:04,475 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 06:07:04,476 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 06:07:04,477 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 06:07:04,477 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 06:07:04,479 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 06:07:04,480 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 06:07:04,482 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 06:07:04,482 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 06:07:04,483 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 06:07:04,485 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 06:07:04,485 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 06:07:04,486 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 06:07:04,486 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 06:07:04,487 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 06:07:04,488 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 06:07:04,488 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 06:07:04,489 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 06:07:04,489 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 06:07:04,490 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 06:07:04,490 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 06:07:04,490 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 06:07:04,491 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 06:07:04,492 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 06:07:04,492 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-10-27 06:07:04,504 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 06:07:04,505 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 06:07:04,506 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-27 06:07:04,506 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-27 06:07:04,506 INFO L133 SettingsManager]: * Use SBE=true [2018-10-27 06:07:04,506 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-10-27 06:07:04,506 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-10-27 06:07:04,507 INFO L133 SettingsManager]: * Use old map elimination=false [2018-10-27 06:07:04,507 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-10-27 06:07:04,507 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-10-27 06:07:04,507 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-10-27 06:07:04,507 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 06:07:04,507 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 06:07:04,508 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 06:07:04,508 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 06:07:04,508 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 06:07:04,508 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 06:07:04,508 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-10-27 06:07:04,508 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-10-27 06:07:04,508 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-10-27 06:07:04,509 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 06:07:04,509 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 06:07:04,509 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-10-27 06:07:04,509 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-10-27 06:07:04,509 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 06:07:04,509 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 06:07:04,509 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-10-27 06:07:04,510 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 06:07:04,510 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-27 06:07:04,510 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-10-27 06:07:04,511 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-27 06:07:04,511 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_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2018-10-27 06:07:04,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 06:07:04,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 06:07:04,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 06:07:04,555 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 06:07:04,555 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 06:07:04,555 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-10-27 06:07:04,605 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/data/364057c37/d5cc293f76634292b31a6670aa6e2ddd/FLAGadafbda95 [2018-10-27 06:07:04,981 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 06:07:04,982 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/sv-benchmarks/c/recursive-simple/fibo_5_false-unreach-call_true-termination.c [2018-10-27 06:07:04,988 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/data/364057c37/d5cc293f76634292b31a6670aa6e2ddd/FLAGadafbda95 [2018-10-27 06:07:04,999 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/data/364057c37/d5cc293f76634292b31a6670aa6e2ddd [2018-10-27 06:07:05,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 06:07:05,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 06:07:05,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 06:07:05,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 06:07:05,008 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 06:07:05,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7454af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05, skipping insertion in model container [2018-10-27 06:07:05,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 06:07:05,039 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 06:07:05,185 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:07:05,189 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 06:07:05,203 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 06:07:05,217 INFO L193 MainTranslator]: Completed translation [2018-10-27 06:07:05,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05 WrapperNode [2018-10-27 06:07:05,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 06:07:05,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 06:07:05,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 06:07:05,218 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 06:07:05,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 06:07:05,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 06:07:05,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 06:07:05,249 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 06:07:05,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... [2018-10-27 06:07:05,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 06:07:05,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 06:07:05,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 06:07:05,266 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 06:07:05,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 06:07:05,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 06:07:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-10-27 06:07:05,421 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-10-27 06:07:05,727 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 06:07:05,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:07:05 BoogieIcfgContainer [2018-10-27 06:07:05,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 06:07:05,728 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-10-27 06:07:05,728 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-10-27 06:07:05,731 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-10-27 06:07:05,733 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:07:05,733 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.10 06:07:05" (1/3) ... [2018-10-27 06:07:05,734 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@f9e19dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:07:05, skipping insertion in model container [2018-10-27 06:07:05,734 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:07:05,734 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:07:05" (2/3) ... [2018-10-27 06:07:05,735 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@f9e19dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.10 06:07:05, skipping insertion in model container [2018-10-27 06:07:05,735 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-10-27 06:07:05,735 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:07:05" (3/3) ... [2018-10-27 06:07:05,738 INFO L375 chiAutomizerObserver]: Analyzing ICFG fibo_5_false-unreach-call_true-termination.c [2018-10-27 06:07:05,796 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-27 06:07:05,797 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-10-27 06:07:05,797 INFO L375 BuchiCegarLoop]: Hoare is false [2018-10-27 06:07:05,797 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-10-27 06:07:05,797 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 06:07:05,797 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 06:07:05,797 INFO L379 BuchiCegarLoop]: Difference is false [2018-10-27 06:07:05,797 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 06:07:05,797 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-10-27 06:07:05,813 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-10-27 06:07:05,869 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:07:05,869 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:07:05,870 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:07:05,882 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:07:05,883 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-10-27 06:07:05,883 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-10-27 06:07:05,883 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-10-27 06:07:05,885 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:07:05,885 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:07:05,885 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:07:05,885 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-10-27 06:07:05,885 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-10-27 06:07:05,894 INFO L793 eck$LassoCheckResult]: Stem: 9#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 20#L25true call main_#t~ret2 := fibo(main_~x~0);< 12#fiboENTRYtrue [2018-10-27 06:07:05,895 INFO L795 eck$LassoCheckResult]: Loop: 12#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 11#L8true assume !(~n == 1); 19#L11true call #t~ret0 := fibo(~n - 1);< 12#fiboENTRYtrue [2018-10-27 06:07:05,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2018-10-27 06:07:05,911 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:05,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:05,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:05,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:05,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:06,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2018-10-27 06:07:06,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:06,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:06,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:06,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:06,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:06,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2018-10-27 06:07:06,022 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:06,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:06,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:06,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:06,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:06,201 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:07:06,202 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:07:06,202 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:07:06,203 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:07:06,203 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:07:06,203 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:06,203 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:07:06,203 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:07:06,204 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration1_Loop [2018-10-27 06:07:06,204 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:07:06,204 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:07:06,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,237 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,244 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,458 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:07:06,459 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-10-27 06:07:06,466 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:07:06,466 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:06,488 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:07:06,488 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:06,512 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:07:06,513 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:07:06,520 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:07:06,520 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:06,542 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:07:06,542 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:07:06,545 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:07:06,546 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:06,566 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:07:06,566 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:07:06,569 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:07:06,569 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:06,590 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:07:06,590 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:06,619 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:07:06,620 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:07:06,652 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:07:06,653 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:07:06,654 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:07:06,654 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:07:06,654 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:07:06,654 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:07:06,654 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:06,654 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:07:06,654 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:07:06,654 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration1_Loop [2018-10-27 06:07:06,655 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:07:06,655 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:07:06,656 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:06,798 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:07:06,803 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:07:06,806 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:06,809 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:06,809 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:06,810 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:06,811 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:06,811 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:06,814 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:06,815 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:06,820 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:07:06,822 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:06,822 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:06,822 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:06,823 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:06,823 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:06,823 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:06,824 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:06,824 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:06,825 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:07:06,825 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:06,826 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:06,826 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:06,826 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:06,826 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:06,826 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:06,826 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:06,826 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:06,830 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:07:06,831 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 [2018-10-27 06:07:06,831 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:06,831 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:06,832 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:06,832 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:06,832 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:06,833 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:06,833 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:06,834 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:07:06,835 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:06,838 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:06,838 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:06,838 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:06,839 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:06,839 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:06,840 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:06,840 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:06,848 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:07:06,853 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:07:06,853 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:07:06,855 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:07:06,855 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:07:06,856 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:07:06,856 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-10-27 06:07:06,858 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:07:06,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:07,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:07,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:07,362 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-10-27 06:07:07,364 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states. Second operand 4 states. [2018-10-27 06:07:07,524 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states.. Second operand 4 states. Result 48 states and 60 transitions. Complement of second has 12 states. [2018-10-27 06:07:07,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-10-27 06:07:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-27 06:07:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2018-10-27 06:07:07,529 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2018-10-27 06:07:07,530 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:07,530 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2018-10-27 06:07:07,530 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:07,531 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2018-10-27 06:07:07,531 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:07,532 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2018-10-27 06:07:07,538 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:07:07,544 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2018-10-27 06:07:07,546 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-10-27 06:07:07,546 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2018-10-27 06:07:07,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2018-10-27 06:07:07,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:07:07,548 INFO L705 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2018-10-27 06:07:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2018-10-27 06:07:07,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-10-27 06:07:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-27 06:07:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2018-10-27 06:07:07,583 INFO L728 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-10-27 06:07:07,583 INFO L608 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-10-27 06:07:07,583 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-10-27 06:07:07,584 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2018-10-27 06:07:07,585 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:07:07,585 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:07:07,586 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:07:07,587 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:07:07,587 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:07:07,588 INFO L793 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 125#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 126#L25 call main_#t~ret2 := fibo(main_~x~0);< 131#fiboENTRY ~n := #in~n; 132#L6 assume !(~n < 1); 130#L8 assume !(~n == 1); 123#L11 call #t~ret0 := fibo(~n - 1);< 133#fiboENTRY ~n := #in~n; 134#L6 assume ~n < 1;#res := 0; 129#fiboFINAL assume true; 122#fiboEXIT >#33#return; 124#L11-1 [2018-10-27 06:07:07,589 INFO L795 eck$LassoCheckResult]: Loop: 124#L11-1 call #t~ret1 := fibo(~n - 2);< 138#fiboENTRY ~n := #in~n; 141#L6 assume !(~n < 1); 140#L8 assume !(~n == 1); 136#L11 call #t~ret0 := fibo(~n - 1);< 138#fiboENTRY ~n := #in~n; 141#L6 assume ~n < 1;#res := 0; 137#fiboFINAL assume true; 139#fiboEXIT >#33#return; 124#L11-1 [2018-10-27 06:07:07,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2018-10-27 06:07:07,589 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:07,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:07,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:07,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:07,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 06:07:07,779 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:07:07,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 06:07:07,783 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:07:07,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:07,783 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2018-10-27 06:07:07,783 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:07,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:07,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:07,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:07,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 06:07:08,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 06:07:08,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 06:07:08,146 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-10-27 06:07:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 06:07:08,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-27 06:07:08,150 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2018-10-27 06:07:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:07:08,320 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-10-27 06:07:08,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 06:07:08,321 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2018-10-27 06:07:08,323 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:07:08,324 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2018-10-27 06:07:08,324 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2018-10-27 06:07:08,324 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2018-10-27 06:07:08,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2018-10-27 06:07:08,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:07:08,325 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-10-27 06:07:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2018-10-27 06:07:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-27 06:07:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-27 06:07:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2018-10-27 06:07:08,330 INFO L728 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-10-27 06:07:08,330 INFO L608 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2018-10-27 06:07:08,330 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-10-27 06:07:08,331 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2018-10-27 06:07:08,332 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-10-27 06:07:08,332 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:07:08,332 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:07:08,333 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:07:08,333 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-27 06:07:08,333 INFO L793 eck$LassoCheckResult]: Stem: 192#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 190#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 191#L25 call main_#t~ret2 := fibo(main_~x~0);< 196#fiboENTRY ~n := #in~n; 197#L6 assume !(~n < 1); 195#L8 assume !(~n == 1); 188#L11 call #t~ret0 := fibo(~n - 1);< 198#fiboENTRY ~n := #in~n; 199#L6 assume !(~n < 1); 193#L8 assume ~n == 1;#res := 1; 194#fiboFINAL assume true; 187#fiboEXIT >#33#return; 189#L11-1 [2018-10-27 06:07:08,333 INFO L795 eck$LassoCheckResult]: Loop: 189#L11-1 call #t~ret1 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume !(~n == 1); 201#L11 call #t~ret0 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 210#L6 assume !(~n < 1); 209#L8 assume ~n == 1;#res := 1; 207#fiboFINAL assume true; 205#fiboEXIT >#33#return; 189#L11-1 [2018-10-27 06:07:08,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:08,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2018-10-27 06:07:08,334 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:08,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:08,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:08,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:08,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:08,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:07:08,412 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:07:08,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:08,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:08,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:07:08,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-27 06:07:08,460 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:07:08,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:08,460 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2018-10-27 06:07:08,460 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:08,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:08,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:08,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:08,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:08,599 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:07:08,599 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:07:08,600 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:07:08,600 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:07:08,600 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:07:08,600 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:08,600 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:07:08,600 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:07:08,600 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration3_Loop [2018-10-27 06:07:08,601 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:07:08,601 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:07:08,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:08,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:08,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:08,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:08,703 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:07:08,703 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:08,705 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:07:08,706 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:08,730 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:07:08,730 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:07:09,784 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:07:09,785 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:07:09,785 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:07:09,785 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:07:09,785 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:07:09,786 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:07:09,786 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:09,786 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:07:09,786 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:07:09,786 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration3_Loop [2018-10-27 06:07:09,786 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:07:09,786 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:07:09,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:09,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:09,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:09,816 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:09,898 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:07:09,898 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:07:09,898 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:09,899 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:09,899 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:09,900 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:09,900 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:09,900 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:09,900 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:09,900 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:09,906 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:07:09,906 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:09,908 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:09,908 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:09,909 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:09,909 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:09,909 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:09,910 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:09,910 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:09,918 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:07:09,924 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:07:09,925 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:07:09,925 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:07:09,925 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:07:09,925 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:07:09,926 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-10-27 06:07:09,926 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:07:09,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:09,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:10,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:10,124 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:07:10,124 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 7 states. [2018-10-27 06:07:10,313 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 135 states and 183 transitions. Complement of second has 28 states. [2018-10-27 06:07:10,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-10-27 06:07:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:07:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-10-27 06:07:10,318 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 10 letters. [2018-10-27 06:07:10,318 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:10,318 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 22 letters. Loop has 10 letters. [2018-10-27 06:07:10,319 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:10,319 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 12 letters. Loop has 20 letters. [2018-10-27 06:07:10,319 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:10,319 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2018-10-27 06:07:10,329 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-10-27 06:07:10,337 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2018-10-27 06:07:10,339 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2018-10-27 06:07:10,340 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-10-27 06:07:10,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2018-10-27 06:07:10,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:07:10,340 INFO L705 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2018-10-27 06:07:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2018-10-27 06:07:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2018-10-27 06:07:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-27 06:07:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2018-10-27 06:07:10,356 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2018-10-27 06:07:10,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 06:07:10,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-27 06:07:10,357 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 7 states. [2018-10-27 06:07:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:07:10,434 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2018-10-27 06:07:10,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 06:07:10,436 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2018-10-27 06:07:10,439 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-10-27 06:07:10,443 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2018-10-27 06:07:10,443 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2018-10-27 06:07:10,444 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2018-10-27 06:07:10,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2018-10-27 06:07:10,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:07:10,445 INFO L705 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2018-10-27 06:07:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2018-10-27 06:07:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2018-10-27 06:07:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-27 06:07:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2018-10-27 06:07:10,458 INFO L728 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-10-27 06:07:10,458 INFO L608 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2018-10-27 06:07:10,458 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-10-27 06:07:10,458 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2018-10-27 06:07:10,462 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-10-27 06:07:10,462 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:07:10,462 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:07:10,463 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:07:10,463 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-27 06:07:10,465 INFO L793 eck$LassoCheckResult]: Stem: 720#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 710#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 711#L25 call main_#t~ret2 := fibo(main_~x~0);< 752#fiboENTRY ~n := #in~n; 755#L6 assume !(~n < 1); 726#L8 assume !(~n == 1); 727#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(~n == 1); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 741#L6 assume !(~n < 1); 774#L8 assume !(~n == 1); 739#L11 call #t~ret0 := fibo(~n - 1);< 738#fiboENTRY ~n := #in~n; 740#L6 assume !(~n < 1); 775#L8 assume ~n == 1;#res := 1; 773#fiboFINAL assume true; 772#fiboEXIT >#33#return; 729#L11-1 call #t~ret1 := fibo(~n - 2);< 771#fiboENTRY ~n := #in~n; 801#L6 assume ~n < 1;#res := 0; 800#fiboFINAL assume true; 799#fiboEXIT >#35#return; 798#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 797#fiboFINAL assume true; 790#fiboEXIT >#33#return; 723#L11-1 [2018-10-27 06:07:10,465 INFO L795 eck$LassoCheckResult]: Loop: 723#L11-1 call #t~ret1 := fibo(~n - 2);< 750#fiboENTRY ~n := #in~n; 776#L6 assume !(~n < 1); 721#L8 assume !(~n == 1); 724#L11 call #t~ret0 := fibo(~n - 1);< 750#fiboENTRY ~n := #in~n; 776#L6 assume !(~n < 1); 721#L8 assume ~n == 1;#res := 1; 725#fiboFINAL assume true; 791#fiboEXIT >#33#return; 723#L11-1 [2018-10-27 06:07:10,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2018-10-27 06:07:10,465 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:10,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:10,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:10,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:10,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 06:07:10,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:07:10,554 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:07:10,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:10,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 06:07:10,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:07:10,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-27 06:07:10,633 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:07:10,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 2 times [2018-10-27 06:07:10,633 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:10,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:10,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:10,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:10,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:10,779 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:07:10,779 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:07:10,779 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:07:10,779 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:07:10,779 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:07:10,779 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:10,779 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:07:10,779 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:07:10,780 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration4_Loop [2018-10-27 06:07:10,780 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:07:10,780 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:07:10,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:10,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:10,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:10,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:10,820 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:07:10,820 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:10,823 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:07:10,823 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:10,848 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:07:10,848 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:07:11,912 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:07:11,913 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:07:11,913 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:07:11,914 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:07:11,914 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:07:11,914 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:07:11,914 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:11,914 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:07:11,914 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:07:11,914 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration4_Loop [2018-10-27 06:07:11,914 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:07:11,914 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:07:11,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:11,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:11,923 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:11,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:11,998 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:07:11,998 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:07:11,999 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:12,000 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:12,000 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:12,000 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:12,000 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:12,000 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:12,001 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:12,001 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:12,002 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:07:12,002 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:12,003 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:12,003 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:12,003 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:12,008 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:12,008 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:12,009 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:12,009 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:12,010 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:07:12,011 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:12,014 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:12,015 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:12,015 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:12,015 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:12,015 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:12,016 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:12,016 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:12,018 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-10-27 06:07:12,019 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:12,019 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:12,023 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:12,023 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:12,023 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:12,023 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:12,024 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:12,024 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:12,031 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:07:12,037 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:07:12,038 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:07:12,038 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:07:12,038 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:07:12,038 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:07:12,039 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2018-10-27 06:07:12,039 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:07:12,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:12,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:12,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:12,224 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:07:12,224 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-10-27 06:07:12,444 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 163 states and 217 transitions. Complement of second has 25 states. [2018-10-27 06:07:12,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-10-27 06:07:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:07:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2018-10-27 06:07:12,448 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 35 transitions. Stem has 28 letters. Loop has 10 letters. [2018-10-27 06:07:12,449 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:12,449 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:07:12,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:12,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:12,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:12,586 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:07:12,586 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-10-27 06:07:12,719 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 288 states and 387 transitions. Complement of second has 25 states. [2018-10-27 06:07:12,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-10-27 06:07:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:07:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2018-10-27 06:07:12,723 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2018-10-27 06:07:12,724 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:12,724 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:07:12,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:12,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:12,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:13,185 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2018-10-27 06:07:13,185 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand 7 states. [2018-10-27 06:07:13,501 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 94 states and 125 transitions. cyclomatic complexity: 36. Second operand 7 states. Result 826 states and 1091 transitions. Complement of second has 112 states. [2018-10-27 06:07:13,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2018-10-27 06:07:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-27 06:07:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 40 transitions. [2018-10-27 06:07:13,503 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 10 letters. [2018-10-27 06:07:13,504 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:13,504 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 38 letters. Loop has 10 letters. [2018-10-27 06:07:13,505 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:13,505 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 40 transitions. Stem has 28 letters. Loop has 20 letters. [2018-10-27 06:07:13,506 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:13,506 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 826 states and 1091 transitions. [2018-10-27 06:07:13,522 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-10-27 06:07:13,533 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 826 states to 413 states and 595 transitions. [2018-10-27 06:07:13,533 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2018-10-27 06:07:13,534 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 180 [2018-10-27 06:07:13,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 413 states and 595 transitions. [2018-10-27 06:07:13,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:07:13,535 INFO L705 BuchiCegarLoop]: Abstraction has 413 states and 595 transitions. [2018-10-27 06:07:13,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states and 595 transitions. [2018-10-27 06:07:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 336. [2018-10-27 06:07:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2018-10-27 06:07:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 463 transitions. [2018-10-27 06:07:13,570 INFO L728 BuchiCegarLoop]: Abstraction has 336 states and 463 transitions. [2018-10-27 06:07:13,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 06:07:13,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-10-27 06:07:13,571 INFO L87 Difference]: Start difference. First operand 336 states and 463 transitions. Second operand 10 states. [2018-10-27 06:07:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:07:14,092 INFO L93 Difference]: Finished difference Result 498 states and 788 transitions. [2018-10-27 06:07:14,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 06:07:14,093 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 498 states and 788 transitions. [2018-10-27 06:07:14,103 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2018-10-27 06:07:14,113 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 498 states to 496 states and 785 transitions. [2018-10-27 06:07:14,113 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 243 [2018-10-27 06:07:14,114 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 243 [2018-10-27 06:07:14,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 496 states and 785 transitions. [2018-10-27 06:07:14,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:07:14,115 INFO L705 BuchiCegarLoop]: Abstraction has 496 states and 785 transitions. [2018-10-27 06:07:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states and 785 transitions. [2018-10-27 06:07:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 366. [2018-10-27 06:07:14,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-10-27 06:07:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 518 transitions. [2018-10-27 06:07:14,143 INFO L728 BuchiCegarLoop]: Abstraction has 366 states and 518 transitions. [2018-10-27 06:07:14,143 INFO L608 BuchiCegarLoop]: Abstraction has 366 states and 518 transitions. [2018-10-27 06:07:14,144 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-10-27 06:07:14,144 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 366 states and 518 transitions. [2018-10-27 06:07:14,147 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-10-27 06:07:14,149 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-10-27 06:07:14,149 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-10-27 06:07:14,150 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 06:07:14,150 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-10-27 06:07:14,150 INFO L793 eck$LassoCheckResult]: Stem: 3580#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3578#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 3579#L25 call main_#t~ret2 := fibo(main_~x~0);< 3620#fiboENTRY ~n := #in~n; 3636#L6 assume !(~n < 1); 3635#L8 assume !(~n == 1); 3631#L11 call #t~ret0 := fibo(~n - 1);< 3633#fiboENTRY ~n := #in~n; 3634#L6 assume !(~n < 1); 3630#L8 assume !(~n == 1); 3582#L11 call #t~ret0 := fibo(~n - 1);< 3627#fiboENTRY ~n := #in~n; 3629#L6 assume !(~n < 1); 3632#L8 assume !(~n == 1); 3583#L11 call #t~ret0 := fibo(~n - 1);< 3627#fiboENTRY ~n := #in~n; 3628#L6 assume !(~n < 1); 3581#L8 assume ~n == 1;#res := 1; 3584#fiboFINAL assume true; 3670#fiboEXIT >#33#return; 3653#L11-1 call #t~ret1 := fibo(~n - 2);< 3660#fiboENTRY ~n := #in~n; 3730#L6 assume !(~n < 1); 3695#L8 assume !(~n == 1); 3697#L11 call #t~ret0 := fibo(~n - 1);< 3863#fiboENTRY ~n := #in~n; 3869#L6 assume !(~n < 1); 3866#L8 assume !(~n == 1); 3867#L11 call #t~ret0 := fibo(~n - 1);< 3880#fiboENTRY [2018-10-27 06:07:14,150 INFO L795 eck$LassoCheckResult]: Loop: 3880#fiboENTRY ~n := #in~n; 3894#L6 assume !(~n < 1); 3893#L8 assume !(~n == 1); 3876#L11 call #t~ret0 := fibo(~n - 1);< 3880#fiboENTRY [2018-10-27 06:07:14,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1816361660, now seen corresponding path program 1 times [2018-10-27 06:07:14,151 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:14,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:14,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:14,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 06:07:14,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-27 06:07:14,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 06:07:14,371 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 06:07:14,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:14,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-27 06:07:14,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-27 06:07:14,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-10-27 06:07:14,512 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-10-27 06:07:14,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2018-10-27 06:07:14,513 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-27 06:07:14,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-27 06:07:14,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:14,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 06:07:14,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 06:07:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-27 06:07:14,547 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:07:14,548 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:07:14,548 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:07:14,548 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:07:14,548 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-10-27 06:07:14,548 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:14,548 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:07:14,548 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:07:14,548 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration5_Loop [2018-10-27 06:07:14,548 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:07:14,548 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:07:14,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,568 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,569 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,594 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:07:14,594 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:14,597 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:07:14,597 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:07:14,600 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-10-27 06:07:14,600 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:14,620 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-10-27 06:07:14,621 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_61423522-d094-4aa5-9086-0bc929659e11/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:14,644 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-10-27 06:07:14,644 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-10-27 06:07:14,666 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-10-27 06:07:14,667 INFO L214 LassoAnalysis]: Preferences: [2018-10-27 06:07:14,668 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-10-27 06:07:14,668 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-10-27 06:07:14,668 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-10-27 06:07:14,668 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-10-27 06:07:14,668 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-27 06:07:14,668 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-10-27 06:07:14,668 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-10-27 06:07:14,668 INFO L131 ssoRankerPreferences]: Filename of dumped script: fibo_5_false-unreach-call_true-termination.c_Iteration5_Loop [2018-10-27 06:07:14,668 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-10-27 06:07:14,668 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-10-27 06:07:14,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,721 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-10-27 06:07:14,788 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-10-27 06:07:14,788 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-10-27 06:07:14,789 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-10-27 06:07:14,789 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-10-27 06:07:14,789 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-10-27 06:07:14,789 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-10-27 06:07:14,790 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-10-27 06:07:14,790 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-10-27 06:07:14,790 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-10-27 06:07:14,790 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-10-27 06:07:14,792 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-10-27 06:07:14,794 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-10-27 06:07:14,794 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-10-27 06:07:14,794 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-10-27 06:07:14,795 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-10-27 06:07:14,795 INFO L517 LassoAnalysis]: Proved termination. [2018-10-27 06:07:14,795 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2018-10-27 06:07:14,795 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-10-27 06:07:14,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:14,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:14,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:14,936 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-10-27 06:07:14,936 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-10-27 06:07:15,006 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 376 states and 528 transitions. Complement of second has 13 states. [2018-10-27 06:07:15,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-10-27 06:07:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:07:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-10-27 06:07:15,009 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-10-27 06:07:15,009 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:15,009 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:07:15,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:15,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:15,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:15,227 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-10-27 06:07:15,228 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-10-27 06:07:15,288 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 376 states and 528 transitions. Complement of second has 13 states. [2018-10-27 06:07:15,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-10-27 06:07:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:07:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-10-27 06:07:15,292 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2018-10-27 06:07:15,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:15,292 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-10-27 06:07:15,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 06:07:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:15,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 06:07:15,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 06:07:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 06:07:15,389 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-10-27 06:07:15,389 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159 Second operand 5 states. [2018-10-27 06:07:15,486 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 366 states and 518 transitions. cyclomatic complexity: 159. Second operand 5 states. Result 493 states and 655 transitions. Complement of second has 14 states. [2018-10-27 06:07:15,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-10-27 06:07:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-27 06:07:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2018-10-27 06:07:15,490 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2018-10-27 06:07:15,490 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:15,491 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2018-10-27 06:07:15,491 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:15,491 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2018-10-27 06:07:15,493 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-10-27 06:07:15,494 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 493 states and 655 transitions. [2018-10-27 06:07:15,502 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 42 [2018-10-27 06:07:15,508 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 493 states to 406 states and 566 transitions. [2018-10-27 06:07:15,509 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-10-27 06:07:15,509 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 161 [2018-10-27 06:07:15,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 406 states and 566 transitions. [2018-10-27 06:07:15,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-10-27 06:07:15,510 INFO L705 BuchiCegarLoop]: Abstraction has 406 states and 566 transitions. [2018-10-27 06:07:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states and 566 transitions. [2018-10-27 06:07:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 390. [2018-10-27 06:07:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2018-10-27 06:07:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 542 transitions. [2018-10-27 06:07:15,531 INFO L728 BuchiCegarLoop]: Abstraction has 390 states and 542 transitions. [2018-10-27 06:07:15,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 06:07:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-10-27 06:07:15,533 INFO L87 Difference]: Start difference. First operand 390 states and 542 transitions. Second operand 20 states. [2018-10-27 06:07:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 06:07:16,294 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2018-10-27 06:07:16,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 06:07:16,295 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 209 transitions. [2018-10-27 06:07:16,296 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:07:16,296 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2018-10-27 06:07:16,297 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-10-27 06:07:16,297 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-10-27 06:07:16,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-10-27 06:07:16,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-10-27 06:07:16,297 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:07:16,297 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:07:16,297 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 06:07:16,297 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-10-27 06:07:16,297 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-10-27 06:07:16,297 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-10-27 06:07:16,297 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-10-27 06:07:16,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.10 06:07:16 BoogieIcfgContainer [2018-10-27 06:07:16,308 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-10-27 06:07:16,309 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 06:07:16,309 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 06:07:16,309 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 06:07:16,309 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:07:05" (3/4) ... [2018-10-27 06:07:16,315 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-27 06:07:16,315 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 06:07:16,316 INFO L168 Benchmark]: Toolchain (without parser) took 11312.92 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 300.9 MB). Free memory was 954.4 MB in the beginning and 1.3 GB in the end (delta: -328.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:07:16,317 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:07:16,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.21 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-10-27 06:07:16,318 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.52 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:07:16,319 INFO L168 Benchmark]: Boogie Preprocessor took 16.22 ms. Allocated memory is still 1.0 GB. Free memory was 943.6 MB in the beginning and 940.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 06:07:16,322 INFO L168 Benchmark]: RCFGBuilder took 461.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Free memory was 940.9 MB in the beginning and 1.2 GB in the end (delta: -236.5 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2018-10-27 06:07:16,322 INFO L168 Benchmark]: BuchiAutomizer took 10580.52 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 110.6 MB). Free memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: -105.6 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-10-27 06:07:16,323 INFO L168 Benchmark]: Witness Printer took 6.51 ms. Allocated memory is still 1.3 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 06:07:16,327 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 213.21 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.52 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.22 ms. Allocated memory is still 1.0 GB. Free memory was 943.6 MB in the beginning and 940.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 461.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Free memory was 940.9 MB in the beginning and 1.2 GB in the end (delta: -236.5 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 10580.52 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 110.6 MB). Free memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: -105.6 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. * Witness Printer took 6.51 ms. Allocated memory is still 1.3 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (4 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 4 modules have a trivial ranking function, the largest among these consists of 20 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.5s and 6 iterations. TraceHistogramMax:6. Analysis of lassos took 5.4s. Construction of modules took 1.2s. Büchi inclusion checks took 3.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 254 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 366 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 161 SDtfs, 363 SDslu, 221 SDs, 0 SdLazy, 743 SolverSat, 193 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf100 lsp90 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq189 hnf92 smp84 dnf100 smp100 tf110 neg97 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 14ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...